replace serde structs with helix-config toml adapter

remove unused languag.scope option
migrate language server config to new config system
2025-10-06 08:23:27 +02:00 · 2024-01-16 14:44:53 +01:00 · 2024-01-16 14:44:52 +01:00 · 2024-01-16 14:44:52 +01:00 · 2024-01-16 14:44:52 +01:00 · 2024-01-16 14:44:51 +01:00
35 changed files with 2684 additions and 1322 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -62,9 +62,9 @@ dependencies = [

 [[package]]
 name = "anyhow"
-version = "1.0.78"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca87830a3e3fb156dc96cfbd31cb620265dd053be734723f22b760d6cc3c3051"
+checksum = "080e9890a082662b09c1ad45f567faeeb47f22b5fb23895fbe1e651e718e25ca"

 [[package]]
 name = "arc-swap"
@@ -1047,11 +1047,29 @@ dependencies = [
 "allocator-api2",
 ]

+[[package]]
+name = "helix-config"
+version = "23.10.0"
+dependencies = [
+ "ahash",
+ "anyhow",
+ "globset",
+ "hashbrown 0.14.3",
+ "indexmap",
+ "parking_lot",
+ "regex",
+ "regex-syntax",
+ "serde",
+ "serde_json",
+ "which",
+]
+
 [[package]]
 name = "helix-core"
 version = "23.10.0"
 dependencies = [
 "ahash",
+ "anyhow",
 "arc-swap",
 "bitflags 2.4.1",
 "chrono",
@@ -1059,8 +1077,10 @@ dependencies = [
 "encoding_rs",
 "etcetera",
 "hashbrown 0.14.3",
+ "helix-config",
 "helix-loader",
 "imara-diff",
+ "indexmap",
 "indoc",
 "log",
 "nucleo",
@@ -1088,6 +1108,7 @@ version = "23.10.0"
 dependencies = [
 "anyhow",
 "fern",
+ "helix-config",
 "helix-core",
 "log",
 "serde",
@@ -1128,13 +1149,16 @@ dependencies = [
 name = "helix-lsp"
 version = "23.10.0"
 dependencies = [
+ "ahash",
 "anyhow",
 "futures-executor",
 "futures-util",
 "globset",
+ "helix-config",
 "helix-core",
 "helix-loader",
 "helix-parsec",
+ "indexmap",
 "log",
 "lsp-types",
 "parking_lot",
@@ -1235,6 +1259,7 @@ dependencies = [
 "clipboard-win",
 "crossterm",
 "futures-util",
+ "helix-config",
 "helix-core",
 "helix-dap",
 "helix-event",
@@ -1337,12 +1362,13 @@ dependencies = [

 [[package]]
 name = "indexmap"
-version = "2.0.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d5477fe2230a79769d8dc68e0eabf5437907c0457a5614a9e8dddb67f65eb65d"
+checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
 dependencies = [
 "equivalent",
 "hashbrown 0.14.3",
+ "serde",
 ]

 [[package]]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 resolver = "2"
 members = [
  "helix-core",
+  "helix-config",
  "helix-view",
  "helix-term",
  "helix-tui",
--- a/helix-config/Cargo.toml
+++ b/helix-config/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "helix-config"
+description = "Helix editor core editing primitives"
+include = ["src/**/*", "README.md"]
+version.workspace = true
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+rust-version.workspace = true
+categories.workspace = true
+repository.workspace = true
+homepage.workspace = true
+
+[dependencies]
+ahash = "0.8.6"
+hashbrown = { version = "0.14.3", features = ["raw"] }
+parking_lot = "0.12"
+anyhow = "1.0.79"
+indexmap = { version = "2.1.0", features = ["serde"] }
+serde = { version = "1.0" }
+serde_json = "1.0"
+globset = "0.4.14"
+regex = "1.10.2"
+regex-syntax = "0.8.2"
+which = "5.0.0"
+
+regex-syntax = "0.8.2"
+which = "5.0.0"
--- a/helix-config/src/any.rs
+++ b/helix-config/src/any.rs
@@ -0,0 +1,76 @@
+/// this is a reimplementation of dynamic dispatch that only stores the
+/// information we need and stores everythin inline. Values that are smaller or
+/// the same size as a slice (2 usize) are also stored inline. This avoids
+/// significant overallocation when setting lots of simple config
+/// options (integers, strings, lists, enums)
+use std::any::{Any, TypeId};
+use std::mem::{align_of, size_of, MaybeUninit};
+
+pub struct ConfigData {
+    data: MaybeUninit<[usize; 2]>,
+    ty: TypeId,
+    drop_fn: unsafe fn(MaybeUninit<[usize; 2]>),
+}
+
+const fn store_inline<T>() -> bool {
+    size_of::<T>() <= size_of::<[usize; 2]>() && align_of::<T>() <= align_of::<[usize; 2]>()
+}
+
+impl ConfigData {
+    unsafe fn drop_impl<T: Any>(mut data: MaybeUninit<[usize; 2]>) {
+        if store_inline::<T>() {
+            data.as_mut_ptr().cast::<T>().drop_in_place();
+        } else {
+            let ptr = data.as_mut_ptr().cast::<*mut T>().read();
+            drop(Box::from_raw(ptr));
+        }
+    }
+
+    pub fn get<T: Any>(&self) -> &T {
+        assert_eq!(TypeId::of::<T>(), self.ty);
+        unsafe {
+            if store_inline::<T>() {
+                return &*self.data.as_ptr().cast();
+            }
+            let data: *const T = self.data.as_ptr().cast::<*const T>().read();
+            &*data
+        }
+    }
+    pub fn new<T: Any>(val: T) -> Self {
+        let mut data = MaybeUninit::uninit();
+        if store_inline::<T>() {
+            let data: *mut T = data.as_mut_ptr() as _;
+            unsafe {
+                data.write(val);
+            }
+        } else {
+            assert!(store_inline::<*const T>());
+            let data: *mut *const T = data.as_mut_ptr() as _;
+            unsafe {
+                data.write(Box::into_raw(Box::new(val)));
+            }
+        };
+        Self {
+            data,
+            ty: TypeId::of::<T>(),
+            drop_fn: ConfigData::drop_impl::<T>,
+        }
+    }
+}
+
+impl Drop for ConfigData {
+    fn drop(&mut self) {
+        unsafe {
+            (self.drop_fn)(self.data);
+        }
+    }
+}
+
+impl std::fmt::Debug for ConfigData {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("ConfigData").finish_non_exhaustive()
+    }
+}
+
+unsafe impl Send for ConfigData {}
+unsafe impl Sync for ConfigData {}
--- a/helix-config/src/convert.rs
+++ b/helix-config/src/convert.rs
@@ -0,0 +1,42 @@
+use crate::any::ConfigData;
+use crate::validator::Ty;
+use crate::Value;
+
+pub trait IntoTy: Clone {
+    type Ty: Ty;
+    fn into_ty(self) -> Self::Ty;
+}
+
+impl<T: Ty> IntoTy for T {
+    type Ty = Self;
+
+    fn into_ty(self) -> Self::Ty {
+        self
+    }
+}
+impl<T: IntoTy> IntoTy for &[T] {
+    type Ty = Box<[T::Ty]>;
+
+    fn into_ty(self) -> Self::Ty {
+        self.iter().cloned().map(T::into_ty).collect()
+    }
+}
+impl<T: IntoTy, const N: usize> IntoTy for &[T; N] {
+    type Ty = Box<[T::Ty]>;
+
+    fn into_ty(self) -> Self::Ty {
+        self.iter().cloned().map(T::into_ty).collect()
+    }
+}
+
+impl IntoTy for &str {
+    type Ty = Box<str>;
+
+    fn into_ty(self) -> Self::Ty {
+        self.into()
+    }
+}
+
+pub(super) fn ty_into_value<T: Ty>(val: &ConfigData) -> Value {
+    T::to_value(val.get())
+}
--- a/helix-config/src/definition.rs
+++ b/helix-config/src/definition.rs
@@ -0,0 +1,113 @@
+use std::time::Duration;
+
+use crate::*;
+
+mod language;
+mod lsp;
+mod ui;
+
+pub use lsp::init_language_server_config;
+
+options! {
+    use ui::*;
+    use lsp::*;
+    use language::*;
+
+    struct WrapConfig {
+        /// Soft wrap lines that exceed viewport width.
+        enable: bool = false,
+        /// Maximum free space left at the end of the line.
+        /// Automatically limited to a quarter of the viewport.
+        max_wrap: u16 = 20,
+        /// Maximum indentation to carry over when soft wrapping a line.
+        /// Automatically limited to a quarter of the viewport.
+        max_indent_retain: u16 = 40,
+        /// Text inserted before soft wrapped lines, highlighted with `ui.virtual.wrap`.
+        wrap_indicator: String = "↪",
+        /// Soft wrap at `text-width` instead of using the full viewport size.
+        wrap_at_text_width: bool = false,
+        /// Maximum line length. Used for the `:reflow` command and
+        /// soft-wrapping if `soft-wrap.wrap-at-text-width` is set
+        text_width: usize = 80,
+    }
+
+    struct MouseConfig {
+        /// Enable mouse mode
+        #[read = copy]
+        mouse: bool = true,
+        /// Number of lines to scroll per scroll wheel step.
+        #[read = copy]
+        scroll_lines: usize = 3,
+        ///  Middle click paste support
+        #[read = copy]
+        middle_click_paste: bool = true,
+    }
+    struct SmartTabConfig {
+        /// If set to true, then when the cursor is in a position with
+        /// non-whitespace to its left, instead of inserting a tab, it will run
+        /// `move_parent_node_end`. If there is only whitespace to the left,
+        /// then it inserts a tab as normal. With the default bindings, to
+        /// explicitly insert a tab character, press Shift-tab.
+        #[name = "smart-tab.enable"]
+        #[read = copy]
+        enable: bool = true,
+        /// Normally, when a menu is on screen, such as when auto complete
+        /// is triggered, the tab key is bound to cycling through the items.
+        /// This means when menus are on screen, one cannot use the tab key
+        /// to trigger the `smart-tab` command. If this option is set to true,
+        /// the `smart-tab` command always takes precedence, which means one
+        /// cannot use the tab key to cycle through menu items. One of the other
+        /// bindings must be used instead, such as arrow keys or `C-n`/`C-p`.
+        #[name = "smart-tab.supersede-menu"]
+        #[read = copy]
+        supersede_menu: bool = false,
+    }
+
+    struct SearchConfig {
+        /// Enable smart case regex searching (case-insensitive unless pattern
+        /// contains upper case characters)
+        #[name = "search.smart-case"]
+        #[read = copy]
+        smart_case: bool = true,
+        /// Whether the search should wrap after depleting the matches
+        #[name = "search.wrap-round"]
+        #[read = copy]
+        wrap_round: bool = true,
+    }
+
+    struct MiscConfig {
+        /// Number of lines of padding around the edge of the screen when scrolling.
+        #[read = copy]
+        scrolloff: usize = 5,
+        /// Shell to use when running external commands
+        #[read = deref]
+        shell: List<String> = if cfg!(windows) {
+             &["cmd", "/C"]
+        } else {
+            &["sh", "-c"]
+        },
+        /// Enable automatic saving on the focus moving away from Helix.
+        /// Requires [focus event support](https://github.com/helix-editor/
+        /// helix/wiki/Terminal-Support) from your terminal
+        #[read = copy]
+        auto_save: bool = false,
+        /// Whether to automatically insert a trailing line-ending on write
+        /// if missing
+        #[read = copy]
+        insert_final_newline: bool = true,
+        /// Time in milliseconds since last keypress before idle timers trigger.
+        /// Used for autocompletion, set to 0 for instant
+        #[read = copy]
+        idle_timeout: Duration = Duration::from_millis(250),
+    }
+}
+
+impl Ty for Duration {
+    fn from_value(val: Value) -> anyhow::Result<Self> {
+        let val: usize = val.typed()?;
+        Ok(Duration::from_millis(val as _))
+    }
+    fn to_value(&self) -> Value {
+        Value::Int(self.as_millis().try_into().unwrap())
+    }
+}
--- a/helix-config/src/definition/language.rs
+++ b/helix-config/src/definition/language.rs
@@ -0,0 +1,27 @@
+use crate::*;
+
+options! {
+    struct LanguageConfig {
+        /// regex pattern that will be tested against a language name in order to determine whether this language should be used for a potential [language injection][treesitter-language-injection] site.
+        #[validator = regex_str_validator()]
+        injection_regex: Option<String> = None,
+        /// The interpreters from the shebang line, for example `["sh", "bash"]`
+        #[read = deref]
+        shebangs: List<String> = List::default(),
+        /// The token to use as a comment-token
+        #[read = deref]
+        comment_token: String = "//",
+        /// The tree-sitter grammar to use (defaults to the language name)
+        grammar: Option<String> = None,
+    }
+
+    struct FormatterConfiguration {
+        #[read = copy]
+        auto_format: bool = true,
+        #[name = "formatter.command"]
+        formatter_command: Option<String> = None,
+        #[name = "formatter.args"]
+        #[read = deref]
+        formatter_args: List<String> = List::default(),
+    }
+}
--- a/helix-config/src/definition/lsp.rs
+++ b/helix-config/src/definition/lsp.rs
@@ -0,0 +1,266 @@
+use std::fmt::{self, Display};
+
+use serde::{Deserialize, Serialize};
+
+use crate::*;
+
+/// Describes the severity level of a [`Diagnostic`].
+#[derive(Debug, Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Deserialize, Serialize)]
+pub enum Severity {
+    Hint,
+    Info,
+    Warning,
+    Error,
+}
+
+impl Ty for Severity {
+    fn from_value(val: Value) -> anyhow::Result<Self> {
+        let val: String = val.typed()?;
+        match &*val {
+            "hint" => Ok(Severity::Hint),
+            "info" => Ok(Severity::Info),
+            "warning" => Ok(Severity::Warning),
+            "error" => Ok(Severity::Error),
+            _ => bail!("expected one of 'hint', 'info', 'warning' or 'error' (got {val:?})"),
+        }
+    }
+
+    fn to_value(&self) -> Value {
+        match self {
+            Severity::Hint => "hint".into(),
+            Severity::Info => "info".into(),
+            Severity::Warning => "warning".into(),
+            Severity::Error => "error".into(),
+        }
+    }
+}
+
+// TODO: move to stdx
+/// Helper macro that automatically generates an array
+/// that contains all variants of an enum
+macro_rules! variant_list {
+    (
+        $(#[$outer:meta])*
+        $vis: vis enum $name: ident {
+           $($(#[$inner: meta])* $variant: ident $(= $_: literal)?),*$(,)?
+        }
+    ) => {
+        $(#[$outer])*
+        $vis enum $name  {
+           $($(#[$inner])* $variant),*
+        }
+        impl $name {
+            $vis const ALL: &[$name] = &[$(Self::$variant),*];
+        }
+    }
+}
+variant_list! {
+    #[derive(Clone, Copy, PartialEq, Eq, Hash)]
+    pub enum LanguageServerFeature {
+        Format,
+        GotoDeclaration,
+        GotoDefinition,
+        GotoTypeDefinition,
+        GotoReference,
+        GotoImplementation,
+        // Goto, use bitflags, combining previous Goto members?
+        SignatureHelp,
+        Hover,
+        DocumentHighlight,
+        Completion,
+        CodeAction,
+        WorkspaceCommand,
+        DocumentSymbols,
+        WorkspaceSymbols,
+        // Symbols, use bitflags, see above?
+        Diagnostics,
+        RenameSymbol,
+        InlayHints,
+    }
+}
+
+impl LanguageServerFeature {
+    fn to_str(self) -> &'static str {
+        use LanguageServerFeature::*;
+
+        match self {
+            Format => "format",
+            GotoDeclaration => "goto-declaration",
+            GotoDefinition => "goto-definition",
+            GotoTypeDefinition => "goto-type-definition",
+            GotoReference => "goto-reference",
+            GotoImplementation => "goto-implementation",
+            SignatureHelp => "signature-help",
+            Hover => "hover",
+            DocumentHighlight => "document-highlight",
+            Completion => "completion",
+            CodeAction => "code-action",
+            WorkspaceCommand => "workspace-command",
+            DocumentSymbols => "document-symbols",
+            WorkspaceSymbols => "workspace-symbols",
+            Diagnostics => "diagnostics",
+            RenameSymbol => "rename-symbol",
+            InlayHints => "inlay-hints",
+        }
+    }
+    fn description(self) -> &'static str {
+        use LanguageServerFeature::*;
+
+        match self {
+            Format => "Use this language server for autoformatting.",
+            GotoDeclaration => "Use this language server for the goto_declaration command.",
+            GotoDefinition => "Use this language server for the goto_definition command.",
+            GotoTypeDefinition => "Use this language server for the goto_type_definition command.",
+            GotoReference => "Use this language server for the goto_reference command.",
+            GotoImplementation => "Use this language server for the goto_implementation command.",
+            SignatureHelp => "Use this language server to display signature help.",
+            Hover => "Use this language server to display hover information.",
+            DocumentHighlight => {
+                "Use this language server for the select_references_to_symbol_under_cursor command."
+            }
+            Completion => "Request completion items from this language server.",
+            CodeAction => "Use this language server for the code_action command.",
+            WorkspaceCommand => "Use this language server for :lsp-workspace-command.",
+            DocumentSymbols => "Use this language server for the symbol_picker command.",
+            WorkspaceSymbols => "Use this language server for the workspace_symbol_picker command.",
+            Diagnostics => "Display diagnostics emitted by this language server.",
+            RenameSymbol => "Use this language server for the rename_symbol command.",
+            InlayHints => "Display inlay hints form this language server.",
+        }
+    }
+}
+
+impl Display for LanguageServerFeature {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let feature = self.to_str();
+        write!(f, "{feature}",)
+    }
+}
+
+impl Debug for LanguageServerFeature {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{self}")
+    }
+}
+
+impl Ty for LanguageServerFeature {
+    fn from_value(val: Value) -> anyhow::Result<Self> {
+        let val: String = val.typed()?;
+        use LanguageServerFeature::*;
+
+        match &*val {
+            "format" => Ok(Format),
+            "goto-declaration" => Ok(GotoDeclaration),
+            "goto-definition" => Ok(GotoDefinition),
+            "goto-type-definition" => Ok(GotoTypeDefinition),
+            "goto-reference" => Ok(GotoReference),
+            "goto-implementation" => Ok(GotoImplementation),
+            "signature-help" => Ok(SignatureHelp),
+            "hover" => Ok(Hover),
+            "document-highlight" => Ok(DocumentHighlight),
+            "completion" => Ok(Completion),
+            "code-action" => Ok(CodeAction),
+            "workspace-command" => Ok(WorkspaceCommand),
+            "document-symbols" => Ok(DocumentSymbols),
+            "workspace-symbols" => Ok(WorkspaceSymbols),
+            "diagnostics" => Ok(Diagnostics),
+            "rename-symbol" => Ok(RenameSymbol),
+            "inlay-hints" => Ok(InlayHints),
+            _ => bail!("invalid language server feature {val}"),
+        }
+    }
+
+    fn to_value(&self) -> Value {
+        Value::String(self.to_str().into())
+    }
+}
+
+pub fn init_language_server_config(registry: &mut OptionRegistry, languag_server: &str) {
+    registry.register(
+        &format!("language-servers.{languag_server}.active"),
+        "Wether this language servers is used for a buffer",
+        false,
+    );
+    for &feature in LanguageServerFeature::ALL {
+        registry.register(
+            &format!("language-servers.{languag_server}.{feature}"),
+            feature.description(),
+            true,
+        );
+    }
+}
+
+options! {
+    struct LspConfig {
+        /// Enables LSP integration. Setting to false will completely disable language servers.
+        #[name = "lsp.enable"]
+        #[read = copy]
+        enable: bool = true,
+        /// Enables LSP integration. Setting to false will completely disable language servers.
+        #[name = "lsp.display-messages"]
+        #[read = copy]
+        display_messages: bool = false,
+        /// Enable automatic popup of signature help (parameter hints)
+        #[name = "lsp.auto-signature-help"]
+        #[read = copy]
+        auto_signature_help: bool = true,
+        /// Enable automatic popup of signature help (parameter hints)
+        #[name = "lsp.display-inlay-hints"]
+        #[read = copy]
+        display_inlay_hints: bool = false,
+        /// Display docs under signature help popup
+        #[name = "lsp.display-signature-help-docs"]
+        #[read = copy]
+        display_signature_help_docs: bool = true,
+        /// Enables snippet completions. Requires a server restart
+        /// (`:lsp-restart`) to take effect after `:config-reload`/`:set`.
+        #[name = "lsp.snippets"]
+        #[read = copy]
+        snippets: bool = true,
+        /// Include declaration in the goto references popup.
+        #[name = "lsp.goto-reference-include-declaration"]
+        #[read = copy]
+        goto_reference_include_declaration: bool = true,
+        // TODO(breaing): prefix all options below with `lsp.`
+        /// The language-id for language servers, checkout the
+        /// table at [TextDocumentItem](https://microsoft.github.io/
+        /// language-server-protocol/specifications/lsp/3.17/specification/
+        /// #textDocumentItem) for the right id
+        #[name = "languague-id"]
+        language_server_id: Option<String> = None,
+        // TODO(breaking): rename to root-markers to differentiate from workspace-roots
+        // TODO: also makes this setteble on the language server
+        /// A set of marker files to look for when trying to find the workspace
+        /// root. For example `Cargo.lock`, `yarn.lock`
+        roots: List<String> = List::default(),
+        // TODO: also makes this setteble on the language server
+        /// Directories relative to the workspace root that are treated as LSP
+        /// roots. The search for root markers (starting at the path of the
+        /// file) will stop at these paths.
+        #[name = "workspace-lsp-roots"]
+        workspace_roots: List<String> = List::default(),
+        /// An array of LSP diagnostic sources assumed unchanged when the
+        /// language server resends the same set of diagnostics. Helix can track
+        /// the position for these diagnostics internally instead. Useful for
+        /// diagnostics that are recomputed on save.
+        persistent_diagnostic_sources: List<String> = List::default(),
+        /// Minimal severity of diagnostic for it to be displayed. (Allowed
+        /// values: `error`, `warning`, `info`, `hint`)
+        diagnostic_severity: Severity = Severity::Hint,
+    }
+
+    struct CompletionConfig {
+        /// Automatic auto-completion, automatically pop up without user trigger.
+        #[read = copy]
+        auto_completion: bool = true,
+        /// Whether to apply completion item instantly when selected
+        #[read = copy]
+        preview_completion_insert: bool = true,
+        /// Whether to apply completion item instantly when selected
+        #[read = copy]
+        completion_replace: bool = false,
+        /// Whether to apply completion item instantly when selected
+        #[read = copy]
+        completion_trigger_len: u8 = 2,
+    }
+}
--- a/helix-config/src/definition/ui.rs
+++ b/helix-config/src/definition/ui.rs
@@ -0,0 +1,291 @@
+use serde::{Deserialize, Serialize};
+
+use crate::*;
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum StatusLineElement {
+    /// The editor mode (Normal, Insert, Visual/Selection)
+    Mode,
+    /// The LSP activity spinner
+    Spinner,
+    /// The file basename (the leaf of the open file's path)
+    FileBaseName,
+    /// The relative file path
+    FileName,
+    // The file modification indicator
+    FileModificationIndicator,
+    /// An indicator that shows `"[readonly]"` when a file cannot be written
+    ReadOnlyIndicator,
+    /// The file encoding
+    FileEncoding,
+    /// The file line endings (CRLF or LF)
+    FileLineEnding,
+    /// The file type (language ID or "text")
+    FileType,
+    /// A summary of the number of errors and warnings
+    Diagnostics,
+    /// A summary of the number of errors and warnings on file and workspace
+    WorkspaceDiagnostics,
+    /// The number of selections (cursors)
+    Selections,
+    /// The number of characters currently in primary selection
+    PrimarySelectionLength,
+    /// The cursor position
+    Position,
+    /// The separator string
+    Separator,
+    /// The cursor position as a percent of the total file
+    PositionPercentage,
+    /// The total line numbers of the current file
+    TotalLineNumbers,
+    /// A single space
+    Spacer,
+    /// Current version control information
+    VersionControl,
+    /// Indicator for selected register
+    Register,
+}
+
+config_serde_adapter!(StatusLineElement);
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
+#[serde(rename_all = "lowercase")]
+/// UNSTABLE
+pub enum CursorKind {
+    /// █
+    Block,
+    /// |
+    Bar,
+    /// _
+    Underline,
+    /// Hidden cursor, can set cursor position with this to let IME have correct cursor position.
+    Hidden,
+}
+
+impl Default for CursorKind {
+    fn default() -> Self {
+        Self::Block
+    }
+}
+
+config_serde_adapter!(CursorKind);
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum WhitespaceRenderValue {
+    None,
+    // TODO
+    // Selection,
+    All,
+}
+
+config_serde_adapter!(WhitespaceRenderValue);
+
+/// bufferline render modes
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum BufferLine {
+    /// Don't render bufferline
+    Never,
+    /// Always render
+    Always,
+    /// Only if multiple buffers are open
+    Multiple,
+}
+
+config_serde_adapter!(BufferLine);
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum PopupBorderConfig {
+    None,
+    All,
+    Popup,
+    Menu,
+}
+
+config_serde_adapter!(PopupBorderConfig);
+
+options! {
+    struct UiConfig {
+        /// Whether to display info boxes
+        #[read = copy]
+        auto_info: bool = true,
+        /// Renders a line at the top of the editor displaying open buffers.
+        /// Can be `always`, `never` or `multiple` (only shown if more than one
+        /// buffer is in use)
+        #[read = copy]
+        bufferline: BufferLine = BufferLine::Never,
+        /// Highlight all lines with a cursor
+        #[read = copy]
+        cursorline: bool = false,
+        /// Highlight all columns with a cursor
+        #[read = copy]
+        cursorcolumn: bool = false,
+        /// List of column positions at which to display the rulers.
+        #[read = deref]
+        rulers: List<u16> = List::default(),
+        /// Whether to color the mode indicator with different colors depending on the mode itself
+        #[read = copy]
+        popup_border: bool = false,
+        /// Whether to color the mode indicator with different colors depending on the mode itself
+        #[read = copy]
+        color_modes: bool = false,
+    }
+
+    struct WhiteSpaceRenderConfig {
+        #[name = "whitespace.characters.space"]
+        #[read = copy]
+        space_char: char =  '·',   // U+00B7
+        #[name = "whitespace.characters.nbsp"]
+        #[read = copy]
+        nbsp_char: char =  '⍽',    // U+237D
+        #[name = "whitespace.characters.tab"]
+        #[read = copy]
+        tab_char: char =  '→',     // U+2192
+        #[name = "whitespace.characters.tabpad"]
+        #[read = copy]
+        tabpad_char: char =  '⏎', // U+23CE
+        #[name = "whitespace.characters.newline"]
+        #[read = copy]
+        newline_char: char =  ' ',
+        #[name = "whitespace.render.default"]
+        #[read = copy]
+        render: WhitespaceRenderValue = WhitespaceRenderValue::None,
+        #[name = "whitespace.render.space"]
+        #[read = copy]
+        render_space: Option<WhitespaceRenderValue> = None,
+        #[name = "whitespace.render.nbsp"]
+        #[read = copy]
+        render_nbsp: Option<WhitespaceRenderValue> = None,
+        #[name = "whitespace.render.tab"]
+        #[read = copy]
+        render_tab: Option<WhitespaceRenderValue> = None,
+        #[name = "whitespace.render.newline"]
+        #[read = copy]
+        render_newline: Option<WhitespaceRenderValue> = None,
+    }
+
+    struct TerminfoConfig {
+        /// Set to `true` to override automatic detection of terminal truecolor
+        /// support in the event of a false negative
+        #[name = "true-color"]
+        #[read = copy]
+        force_true_color: bool = false,
+        /// Set to `true` to override automatic detection of terminal undercurl
+        /// support in the event of a false negative
+        #[name = "undercurl"]
+        #[read = copy]
+        force_undercurl: bool = false,
+    }
+
+    struct IndentGuidesConfig {
+        /// Whether to render indent guides
+        #[read = copy]
+        render: bool = false,
+        /// Character to use for rendering indent guides
+        #[read = copy]
+        character: char = '│',
+        /// Number of indent levels to skip
+        #[read = copy]
+        skip_levels: u8 = 0,
+    }
+
+    struct CursorShapeConfig {
+        /// Cursor shape in normal mode
+        #[name = "cursor-shape.normal"]
+        #[read = copy]
+        normal_mode_cursor: CursorKind = CursorKind::Block,
+        /// Cursor shape in select mode
+        #[name = "cursor-shape.select"]
+        #[read = copy]
+        select_mode_cursor: CursorKind = CursorKind::Block,
+        /// Cursor shape in insert mode
+        #[name = "cursor-shape.insert"]
+        #[read = copy]
+        insert_mode_cursor: CursorKind = CursorKind::Block,
+    }
+
+    struct FilePickerConfig {
+        /// Whether to exclude hidden files from any file pickers.
+        #[name = "file-picker.hidden"]
+        #[read = copy]
+        hidden: bool = true,
+        /// Follow symlinks instead of ignoring them
+        #[name = "file-picker.follow-symlinks"]
+        #[read = copy]
+        follow_symlinks: bool = true,
+        /// Ignore symlinks that point at files already shown in the picker
+        #[name = "file-picker.deduplicate-links"]
+        #[read = copy]
+        deduplicate_links: bool = true,
+        /// Enables reading ignore files from parent directories.
+        #[name = "file-picker.parents"]
+        #[read = copy]
+        parents: bool = true,
+        /// Enables reading `.ignore` files.
+        #[name = "file-picker.ignore"]
+        #[read = copy]
+        ignore: bool = true,
+        /// Enables reading `.gitignore` files.
+        #[name = "file-picker.git-ignore"]
+        #[read = copy]
+        git_ignore: bool = true,
+        /// Enables reading global .gitignore, whose path is specified in git's config: `core.excludefile` option.
+        #[name = "file-picker.git-global"]
+        #[read = copy]
+        git_global: bool = true,
+        /// Enables reading `.git/info/exclude` files.
+        #[name = "file-picker.git-exclude"]
+        #[read = copy]
+        git_exclude: bool = true,
+        /// Maximum Depth to recurse directories in file picker and global search.
+        #[name = "file-picker.max-depth"]
+        #[read = copy]
+        max_depth: Option<usize> = None,
+    }
+
+    struct StatusLineConfig{
+        /// A list of elements aligned to the left of the statusline
+        #[name = "statusline.left"]
+        #[read = deref]
+        left: List<StatusLineElement> =  &[
+            StatusLineElement::Mode,
+            StatusLineElement::Spinner,
+            StatusLineElement::FileName,
+            StatusLineElement::ReadOnlyIndicator,
+            StatusLineElement::FileModificationIndicator,
+        ],
+        /// A list of elements aligned to the middle of the statusline
+        #[name = "statusline.center"]
+        #[read = deref]
+        center: List<StatusLineElement> =  List::default(),
+        /// A list of elements aligned to the right of the statusline
+        #[name = "statusline.right"]
+        #[read = deref]
+        right: List<StatusLineElement> =  &[
+            StatusLineElement::Diagnostics,
+            StatusLineElement::Selections,
+            StatusLineElement::Register,
+            StatusLineElement::Position,
+            StatusLineElement::FileEncoding,
+        ],
+        /// The character used to separate elements in the statusline
+        #[name = "statusline.seperator"]
+        #[read = deref]
+        seperator: String = "│",
+        /// The text shown in the `mode` element for normal mode
+        #[name = "statusline.mode.normal"]
+        #[read = deref]
+        mode_indicator_normal: String = "NOR",
+        /// The text shown in the `mode` element for insert mode
+        #[name = "statusline.mode.insert"]
+        #[read = deref]
+        mode_indicator_insert: String = "INS",
+        /// The text shown in the `mode` element for select mode
+        #[name = "statusline.mode.select"]
+        #[read = deref]
+        mode_indicator_select: String = "SEL",
+    }
+}
--- a/helix-config/src/env.rs
+++ b/helix-config/src/env.rs
@@ -0,0 +1,10 @@
+// TOOD: move to stdx
+
+pub fn binary_exists(binary_name: &str) -> bool {
+    which::which(binary_name).is_ok()
+}
+
+#[cfg(not(windows))]
+pub fn env_var_is_set(env_var_name: &str) -> bool {
+    std::env::var_os(env_var_name).is_some()
+}
--- a/helix-config/src/lib.rs
+++ b/helix-config/src/lib.rs
@@ -0,0 +1,246 @@
+use std::any::Any;
+use std::fmt::Debug;
+use std::marker::PhantomData;
+use std::ops::Deref;
+use std::sync::Arc;
+
+use anyhow::bail;
+use hashbrown::hash_map::Entry;
+use hashbrown::HashMap;
+use indexmap::IndexMap;
+use parking_lot::{MappedRwLockReadGuard, RwLock, RwLockReadGuard};
+
+use any::ConfigData;
+use convert::ty_into_value;
+pub use convert::IntoTy;
+pub use definition::{init_config, init_language_server_config};
+pub use toml::read_toml_config;
+use validator::StaticValidator;
+pub use validator::{regex_str_validator, ty_validator, IntegerRangeValidator, Ty, Validator};
+pub use value::{from_value, to_value, Value};
+
+mod any;
+mod convert;
+mod definition;
+pub mod env;
+mod macros;
+mod toml;
+mod validator;
+mod value;
+
+pub type Guard<'a, T> = MappedRwLockReadGuard<'a, T>;
+pub type Map<T> = IndexMap<Box<str>, T, ahash::RandomState>;
+pub type String = Box<str>;
+pub type List<T> = Box<[T]>;
+
+#[cfg(test)]
+mod tests;
+
+#[derive(Debug)]
+pub struct OptionInfo {
+    pub name: Arc<str>,
+    pub description: Box<str>,
+    pub validator: Box<dyn Validator>,
+    pub into_value: fn(&ConfigData) -> Value,
+}
+
+#[derive(Debug)]
+pub struct OptionManager {
+    vals: RwLock<HashMap<Arc<str>, ConfigData>>,
+    parent: Option<Arc<OptionManager>>,
+}
+
+impl OptionManager {
+    pub fn get<T: Any>(&self, option: &str) -> Guard<'_, T> {
+        Guard::map(self.get_data(option), ConfigData::get)
+    }
+
+    pub fn get_data(&self, option: &str) -> Guard<'_, ConfigData> {
+        let mut current_scope = self;
+        loop {
+            let lock = current_scope.vals.read();
+            if let Ok(res) = RwLockReadGuard::try_map(lock, |options| options.get(option)) {
+                return res;
+            }
+            let Some(new_scope) = current_scope.parent.as_deref() else{
+                unreachable!("option must be atleast defined in the global scope")
+            };
+            current_scope = new_scope;
+        }
+    }
+
+    pub fn get_deref<T: Deref + Any>(&self, option: &str) -> Guard<'_, T::Target> {
+        Guard::map(self.get::<T>(option), T::deref)
+    }
+
+    pub fn get_folded<T: Any, R>(
+        &self,
+        option: &str,
+        init: R,
+        mut fold: impl FnMut(&T, R) -> R,
+    ) -> R {
+        let mut res = init;
+        let mut current_scope = self;
+        loop {
+            let options = current_scope.vals.read();
+            if let Some(option) = options.get(option).map(|val| val.get()) {
+                res = fold(option, res);
+            }
+            let Some(new_scope) = current_scope.parent.as_deref() else{
+                break
+            };
+            current_scope = new_scope;
+        }
+        res
+    }
+
+    pub fn get_value(
+        &self,
+        option: impl Into<Arc<str>>,
+        registry: &OptionRegistry,
+    ) -> anyhow::Result<Value> {
+        let option: Arc<str> = option.into();
+        let Some(opt) = registry.get(&option) else { bail!("unknown option {option:?}") };
+        let data = self.get_data(&option);
+        let val = (opt.into_value)(&data);
+        Ok(val)
+    }
+
+    pub fn create_scope(self: &Arc<OptionManager>) -> OptionManager {
+        OptionManager {
+            vals: RwLock::default(),
+            parent: Some(self.clone()),
+        }
+    }
+
+    pub fn set_parent_scope(&mut self, parent: Arc<OptionManager>) {
+        self.parent = Some(parent)
+    }
+
+    pub fn set_unchecked(&self, option: Arc<str>, val: ConfigData) {
+        self.vals.write().insert(option, val);
+    }
+
+    pub fn append(
+        &self,
+        option: impl Into<Arc<str>>,
+        val: impl Into<Value>,
+        registry: &OptionRegistry,
+        max_depth: usize,
+    ) -> anyhow::Result<()> {
+        let val = val.into();
+        let option: Arc<str> = option.into();
+        let Some(opt) = registry.get(&option) else { bail!("unknown option {option:?}") };
+        let old_data = self.get_data(&option);
+        let mut old = (opt.into_value)(&old_data);
+        old.append(val, max_depth);
+        let val = opt.validator.validate(old)?;
+        self.set_unchecked(option, val);
+        Ok(())
+    }
+
+    /// Sets the value of a config option. Returns an error if this config
+    /// option doesn't exist or the provided value is not valid.
+    pub fn set(
+        &self,
+        option: impl Into<Arc<str>>,
+        val: impl Into<Value>,
+        registry: &OptionRegistry,
+    ) -> anyhow::Result<()> {
+        let option: Arc<str> = option.into();
+        let val = val.into();
+        let Some(opt) = registry.get(&option) else { bail!("unknown option {option:?}") };
+        let val = opt.validator.validate(val)?;
+        self.set_unchecked(option, val);
+        Ok(())
+    }
+
+    /// unsets an options so that its value will be read from
+    /// the parent scope instead
+    pub fn unset(&self, option: &str) {
+        self.vals.write().remove(option);
+    }
+}
+
+#[derive(Debug)]
+pub struct OptionRegistry {
+    options: HashMap<Arc<str>, OptionInfo>,
+    defaults: Arc<OptionManager>,
+}
+
+impl OptionRegistry {
+    pub fn new() -> Self {
+        Self {
+            options: HashMap::with_capacity(1024),
+            defaults: Arc::new(OptionManager {
+                vals: RwLock::new(HashMap::with_capacity(1024)),
+                parent: None,
+            }),
+        }
+    }
+
+    pub fn register<T: IntoTy>(&mut self, name: &str, description: &str, default: T) {
+        self.register_with_validator(
+            name,
+            description,
+            default,
+            StaticValidator::<T::Ty> { ty: PhantomData },
+        );
+    }
+
+    pub fn register_with_validator<T: IntoTy>(
+        &mut self,
+        name: &str,
+        description: &str,
+        default: T,
+        validator: impl Validator,
+    ) {
+        let mut name: Arc<str> = name.into();
+        // convert from snake case to kebab case in place without an additional
+        // allocation this is save since we only replace ascii with ascii in
+        // place std really ougth to have a function for this :/
+        // TODO: move to stdx as extension trait
+        for byte in unsafe { Arc::get_mut(&mut name).unwrap().as_bytes_mut() } {
+            if *byte == b'-' {
+                *byte = b'_';
+            }
+        }
+        let default = default.into_ty();
+        match self.options.entry(name.clone()) {
+            Entry::Vacant(e) => {
+                // make sure the validator is correct
+                if cfg!(debug_assertions) {
+                    validator.validate(T::Ty::to_value(&default)).unwrap();
+                }
+                let opt = OptionInfo {
+                    name: name.clone(),
+                    description: description.into(),
+                    validator: Box::new(validator),
+                    into_value: ty_into_value::<T::Ty>,
+                };
+                e.insert(opt);
+            }
+            Entry::Occupied(ent) => {
+                ent.get()
+                    .validator
+                    .validate(T::Ty::to_value(&default))
+                    .unwrap();
+            }
+        }
+        self.defaults.set_unchecked(name, ConfigData::new(default));
+    }
+
+    pub fn global_scope(&self) -> Arc<OptionManager> {
+        self.defaults.clone()
+    }
+
+    pub fn get(&self, name: &str) -> Option<&OptionInfo> {
+        self.options.get(name)
+    }
+}
+
+impl Default for OptionRegistry {
+    fn default() -> Self {
+        Self::new()
+    }
+}
--- a/helix-config/src/macros.rs
+++ b/helix-config/src/macros.rs
@@ -0,0 +1,130 @@
+/// This macro allows specifiying a trait of related config
+/// options with a struct like syntax. From that information
+/// two things are generated:
+///
+/// * A `init_config` function that registers the config options with the
+///   `OptionRegistry` registry.
+/// * A **trait** definition with an accessor for every config option that is
+///   implemented for `OptionManager`.
+///
+/// The accessors on the trait allow convenient statically typed access to
+/// config fields. The accessors return `Guard<T>` (which allows derferecning to
+/// &T). Any type that implements copy can be returned as a copy instead by
+/// specifying `#[read = copy]`. Collections like `List<T>` and `String` are not
+/// copy However, they usually implement deref (to &[T] and &str respectively).
+/// Working with the dereferneced &str/&[T] is more convenient then &String and &List<T>. The
+/// accessor will return these if `#[read = deref]` is specified.
+///
+/// The doc comments will be retained for the accessors and also stored in the
+/// option registrry for dispaly in the UI and documentation.
+///
+/// The name of a config option can be changed with #[name = "<name>"],
+/// otherwise the name of the field is used directly. The OptionRegistry
+/// automatically converts all names to kebab-case so a name attribute is only
+/// required if the name is supposed to be significantly altered.
+///
+/// In some cases more complex validation may be necssary. In that case the
+/// valiidtator can be provided with an exprission that implements the `Validator`
+/// trait: `#[validator = create_validator()]`.
+#[macro_export]
+macro_rules! options {
+    (
+        $(use $use: ident::*;)*
+        $($(#[$($meta: tt)*])* struct $ident: ident {
+            $(
+                $(#[doc = $option_desc: literal])*
+                $(#[name = $option_name: literal])?
+                $(#[validator = $option_validator: expr])?
+                $(#[read = $($extra: tt)*])?
+                $option: ident: $ty: ty = $default: expr
+            ),+$(,)?
+        })+
+    ) => {
+        $(pub use $use::*;)*
+        $($(#[$($meta)*])* pub trait $ident {
+            $(
+                $(#[doc = $option_desc])*
+                fn $option(&self) -> $crate::options!(@ret_ty $($($extra)*)? $ty);
+            )+
+        })+
+        pub fn init_config(registry: &mut $crate::OptionRegistry) {
+            $($use::init_config(registry);)*
+            $($(
+                let name = $crate::options!(@name $option $($option_name)?);
+                let docs = concat!("" $(,$option_desc,)" "*);
+                $crate::options!(@register registry name docs $default, $ty $(,$option_validator)?);
+            )+)+
+        }
+        $(impl $ident for $crate::OptionManager {
+            $(
+                $(#[doc = $option_desc])*
+                fn $option(&self) -> $crate::options!(@ret_ty $($($extra)*)? $ty) {
+                    let name = $crate::options!(@name $option $($option_name)?);
+                    $crate::options!(@get $($($extra)*)? self, $ty, name)
+                }
+            )+
+        })+
+    };
+    (@register $registry: ident $name: ident $desc: ident $default: expr, $ty:ty) => {{
+        use $crate::IntoTy;
+        let val: $ty = $default.into_ty();
+        $registry.register($name, $desc, val);
+    }};
+    (@register $registry: ident $name: ident $desc: ident  $default: expr, $ty:ty, $validator: expr) => {{
+        use $crate::IntoTy;
+        let val: $ty = $default.into_ty();
+        $registry.register_with_validator($name, $desc, val, $validator);
+    }};
+    (@name $ident: ident) => {
+        ::std::stringify!($ident)
+    };
+    (@name $ident: ident $name: literal) => {
+        $name
+    };
+    (@ret_ty copy $ty: ty) => {
+        $ty
+    };
+    (@ret_ty map($fn: expr, $ret_ty: ty) $ty: ty) => {
+        $ret_ty
+    };
+    (@ret_ty fold($init: expr, $fn: expr, $ret_ty: ty) $ty: ty) => {
+        $ret_ty
+    };
+    (@ret_ty deref $ty: ty) => {
+        $crate::Guard<'_, <$ty as ::std::ops::Deref>::Target>
+    };
+    (@ret_ty $ty: ty) => {
+        $crate::Guard<'_, $ty>
+    };
+    (@get map($fn: expr, $ret_ty: ty) $config: ident, $ty: ty, $name: ident) => {
+        let val = $config.get::<$ty>($name);
+        $fn(val)
+    };
+    (@get fold($init: expr, $fn: expr, $ret_ty: ty) $config: ident, $ty: ty, $name: ident) => {
+        $config.get_folded::<$ty, $ret_ty>($name, $init, $fn)
+    };
+    (@get copy $config: ident, $ty: ty, $name: ident) => {
+        *$config.get::<$ty>($name)
+    };
+    (@get deref $config: ident, $ty: ty, $name: ident) => {
+        $config.get_deref::<$ty>($name)
+    };
+    (@get $config: ident, $ty: ty, $name: ident) => {
+        $config.get::<$ty>($name)
+    };
+}
+
+#[macro_export]
+macro_rules! config_serde_adapter {
+    ($ty: ident) => {
+        impl $crate::Ty for $ty {
+            fn to_value(&self) -> $crate::Value {
+                $crate::to_value(self).unwrap()
+            }
+            fn from_value(val: $crate::Value) -> ::anyhow::Result<Self> {
+                let val = $crate::from_value(val)?;
+                Ok(val)
+            }
+        }
+    };
+}
--- a/helix-config/src/tests.rs
+++ b/helix-config/src/tests.rs
@@ -0,0 +1,80 @@
+use std::ops::Deref;
+use std::sync::Arc;
+
+use serde::{Deserialize, Serialize};
+
+use crate::config_serde_adapter;
+use crate::OptionRegistry;
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum LineNumber {
+    /// Show absolute line number
+    #[serde(alias = "abs")]
+    Absolute,
+    /// If focused and in normal/select mode, show relative line number to the primary cursor.
+    /// If unfocused or in insert mode, show absolute line number.
+    #[serde(alias = "rel")]
+    Relative,
+}
+
+config_serde_adapter!(LineNumber);
+
+fn setup_registry() -> OptionRegistry {
+    let mut registry = OptionRegistry::new();
+    registry.register(
+        "scrolloff",
+        "Number of lines of padding around the edge of the screen when scrolling",
+        5usize,
+    );
+    registry.register(
+        "shell",
+        "Shell to use when running external commands",
+        &["sh", "-c"],
+    );
+    registry.register("mouse", "Enable mouse mode", true);
+    registry.register(
+        "line-number",
+        "Line number display: `absolute` simply shows each line's number, while \
+        `relative` shows the distance from the current line. When unfocused or in \
+        insert mode, `relative` will still show absolute line numbers",
+        LineNumber::Absolute,
+    );
+    registry
+}
+
+#[test]
+fn default_values() {
+    let registry = setup_registry();
+    let global_scope = registry.global_scope();
+    let scrolloff: usize = *global_scope.get("scrolloff");
+    let shell_ = global_scope.get_deref::<Box<[_]>>("shell");
+    let shell: &[Box<str>] = &shell_;
+    let mouse: bool = *global_scope.get("mouse");
+    let line_number: LineNumber = *global_scope.get("line-number");
+    assert_eq!(scrolloff, 5);
+    assert!(shell.iter().map(Box::deref).eq(["sh", "-c"]));
+    assert!(mouse);
+    assert_eq!(line_number, LineNumber::Absolute);
+}
+
+#[test]
+fn scope_overwrite() {
+    let registry = setup_registry();
+    let global_scope = registry.global_scope();
+    let scope_1 = Arc::new(global_scope.create_scope());
+    let scope_2 = Arc::new(global_scope.create_scope());
+    let mut scope_3 = scope_1.create_scope();
+    scope_1.set("line-number", "rel", &registry).unwrap();
+    let line_number: LineNumber = *scope_3.get("line-number");
+    assert_eq!(line_number, LineNumber::Relative);
+    scope_3.set_parent_scope(scope_2.clone());
+    let line_number: LineNumber = *scope_3.get("line-number");
+    assert_eq!(line_number, LineNumber::Absolute);
+    scope_2.set("line-number", "rel", &registry).unwrap();
+    let line_number: LineNumber = *scope_3.get("line-number");
+    assert_eq!(line_number, LineNumber::Relative);
+    scope_2.set("line-number", "abs", &registry).unwrap();
+    let line_number: LineNumber = *scope_3.get("line-number");
+    assert_eq!(line_number, LineNumber::Absolute);
+}
--- a/helix-config/src/toml.rs
+++ b/helix-config/src/toml.rs
@@ -0,0 +1,69 @@
+use crate::{Map, OptionManager, OptionRegistry, Value};
+
+/// Inserts the config declaration from a map deserialized from toml into
+/// options manager. Returns an error if any of theu config options are
+/// invalid The convresion may not be exactly one-to-one to retain backwards
+/// compatibility
+pub fn read_toml_config(
+    config_entries: Map<Value>,
+    options: &OptionManager,
+    registry: &OptionRegistry,
+) -> anyhow::Result<()> {
+    let mut buf = String::new();
+    for (key, val) in config_entries {
+        if matches!(val, Value::Map(_)) {
+            buf.push_str(&key);
+            visit(&mut buf, val, options, registry)?;
+            buf.clear();
+        } else {
+            visit(&mut key.to_string(), val, options, registry)?;
+        }
+    }
+    Ok(())
+}
+
+fn visit(
+    path: &mut String,
+    val: Value,
+    options: &OptionManager,
+    registry: &OptionRegistry,
+) -> anyhow::Result<()> {
+    match &**path {
+        // don't descend
+        "auto-format" => {
+            // treat as unset
+            if Value::Bool(true) == val {
+                return Ok(());
+            }
+        }
+        "auto-pairs" => return options.set("auto-pairs", val, registry),
+        "enviorment" => return options.set("enviorment", val, registry),
+        "config" => return options.set("config", val, registry),
+        "gutters" if matches!(val, Value::List(_)) => {
+            return options.set("gutters.layout", val, registry);
+        }
+        "gutters" if matches!(val, Value::List(_)) => {
+            return options.set("gutters.layout", val, registry);
+        }
+        "whitespace.render" if matches!(val, Value::String(_)) => {
+            return options.set("whitespace.render.default", val, registry);
+        }
+        "language-servers" => {
+            // merge list/map of language servers but if "only" and "except" are specified overwrite
+            return options.append("language-servers", val, registry, 0);
+        }
+        _ => (),
+    };
+    if let Value::Map(val) = val {
+        let old_path_len = path.len();
+        for (key, val) in val.into_iter() {
+            path.push('.');
+            path.push_str(&key);
+            visit(path, val, options, registry)?;
+            path.truncate(old_path_len);
+        }
+        Ok(())
+    } else {
+        options.set(&**path, val, registry)
+    }
+}
--- a/helix-config/src/validator.rs
+++ b/helix-config/src/validator.rs
@@ -0,0 +1,296 @@
+use std::any::{type_name, Any};
+use std::error::Error;
+use std::fmt::Debug;
+use std::marker::PhantomData;
+
+use anyhow::{bail, ensure, Result};
+
+use crate::any::ConfigData;
+use crate::Value;
+
+pub trait Validator: 'static + Debug {
+    fn validate(&self, val: Value) -> Result<ConfigData>;
+}
+
+pub trait Ty: Sized + Clone + 'static {
+    fn from_value(val: Value) -> Result<Self>;
+    fn to_value(&self) -> Value;
+}
+
+#[derive(Clone, Copy)]
+pub struct IntegerRangeValidator<T> {
+    pub min: isize,
+    pub max: isize,
+    ty: PhantomData<T>,
+}
+impl<E, T> IntegerRangeValidator<T>
+where
+    E: Debug,
+    T: TryInto<isize, Error = E>,
+{
+    pub fn new(min: T, max: T) -> Self {
+        Self {
+            min: min.try_into().unwrap(),
+            max: max.try_into().unwrap(),
+            ty: PhantomData,
+        }
+    }
+}
+
+impl<T> Debug for IntegerRangeValidator<T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("IntegerRangeValidator")
+            .field("min", &self.min)
+            .field("max", &self.max)
+            .field("ty", &type_name::<T>())
+            .finish()
+    }
+}
+
+impl<E, T> IntegerRangeValidator<T>
+where
+    E: Error + Sync + Send + 'static,
+    T: Any + TryFrom<isize, Error = E>,
+{
+    pub fn validate(&self, val: Value) -> Result<T> {
+        let IntegerRangeValidator { min, max, .. } = *self;
+        let Value::Int(val) = val else {
+            bail!("expected an integer")
+        };
+        ensure!(
+            min <= val && val <= max,
+            "expected an integer between {min} and {max} (got {val})",
+        );
+        Ok(T::try_from(val)?)
+    }
+}
+impl<E, T> Validator for IntegerRangeValidator<T>
+where
+    E: Error + Sync + Send + 'static,
+    T: Any + TryFrom<isize, Error = E>,
+{
+    fn validate(&self, val: Value) -> Result<ConfigData> {
+        Ok(ConfigData::new(self.validate(val)))
+    }
+}
+
+macro_rules! integer_tys {
+    ($($ty: ident),*) => {
+        $(
+            impl Ty for $ty {
+                fn to_value(&self) -> Value {
+                    Value::Int((*self).try_into().unwrap())
+                }
+
+                fn from_value(val: Value) -> Result<Self> {
+                    IntegerRangeValidator::new($ty::MIN, $ty::MAX).validate(val)
+                }
+            }
+        )*
+
+    };
+}
+
+integer_tys! {
+    i8, i16, i32, isize,
+    u8, u16, u32
+}
+
+impl Ty for usize {
+    fn to_value(&self) -> Value {
+        Value::Int((*self).try_into().unwrap())
+    }
+
+    fn from_value(val: Value) -> Result<Self> {
+        IntegerRangeValidator::new(0usize, isize::MAX as usize).validate(val)
+    }
+}
+
+impl Ty for u64 {
+    fn to_value(&self) -> Value {
+        Value::Int((*self).try_into().unwrap())
+    }
+
+    fn from_value(val: Value) -> Result<Self> {
+        IntegerRangeValidator::new(0u64, isize::MAX as u64).validate(val)
+    }
+}
+
+impl Ty for bool {
+    fn to_value(&self) -> Value {
+        Value::Bool(*self)
+    }
+    fn from_value(val: Value) -> Result<Self> {
+        let Value::Bool(val) = val else {
+            bail!("expected a boolean")
+        };
+        Ok(val)
+    }
+}
+
+impl Ty for Box<str> {
+    fn to_value(&self) -> Value {
+        Value::String(self.clone().into_string())
+    }
+    fn from_value(val: Value) -> Result<Self> {
+        let Value::String(val) = val else {
+            bail!("expected a string")
+        };
+        Ok(val.into_boxed_str())
+    }
+}
+
+impl Ty for char {
+    fn to_value(&self) -> Value {
+        Value::String(self.to_string())
+    }
+
+    fn from_value(val: Value) -> Result<Self> {
+        let Value::String(val) = val else {
+            bail!("expected a string")
+        };
+        ensure!(
+            val.chars().count() == 1,
+            "expecet a single character (got {val:?})"
+        );
+        Ok(val.chars().next().unwrap())
+    }
+}
+
+impl Ty for std::string::String {
+    fn to_value(&self) -> Value {
+        Value::String(self.clone())
+    }
+    fn from_value(val: Value) -> Result<Self> {
+        let Value::String(val) = val else {
+            bail!("expected a string")
+        };
+        Ok(val)
+    }
+}
+
+impl<T: Ty> Ty for Option<T> {
+    fn to_value(&self) -> Value {
+        match self {
+            Some(_) => todo!(),
+            None => todo!(),
+        }
+    }
+
+    fn from_value(val: Value) -> Result<Self> {
+        if val == Value::Null {
+            return Ok(None);
+        }
+        Ok(Some(T::from_value(val)?))
+    }
+}
+
+impl<T: Ty> Ty for Box<T> {
+    fn from_value(val: Value) -> Result<Self> {
+        Ok(Box::new(T::from_value(val)?))
+    }
+
+    fn to_value(&self) -> Value {
+        T::to_value(self)
+    }
+}
+
+impl<T: Ty> Ty for indexmap::IndexMap<Box<str>, T, ahash::RandomState> {
+    fn from_value(val: Value) -> Result<Self> {
+        let Value::Map(map) = val else {
+            bail!("expected a map");
+        };
+        map.into_iter()
+            .map(|(k, v)| Ok((k, T::from_value(v)?)))
+            .collect()
+    }
+
+    fn to_value(&self) -> Value {
+        let map = self
+            .iter()
+            .map(|(k, v)| (k.clone(), v.to_value()))
+            .collect();
+        Value::Map(Box::new(map))
+    }
+}
+
+impl<T: Ty> Ty for Box<[T]> {
+    fn to_value(&self) -> Value {
+        Value::List(self.iter().map(T::to_value).collect())
+    }
+    fn from_value(val: Value) -> Result<Self> {
+        let Value::List(val) = val else {
+            bail!("expected a list")
+        };
+        val.iter().cloned().map(T::from_value).collect()
+    }
+}
+
+impl Ty for serde_json::Value {
+    fn from_value(val: Value) -> Result<Self> {
+        Ok(val.into())
+    }
+
+    fn to_value(&self) -> Value {
+        self.into()
+    }
+}
+
+pub(super) struct StaticValidator<T: Ty> {
+    pub(super) ty: PhantomData<fn(&T)>,
+}
+
+impl<T: Ty> Debug for StaticValidator<T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("StaticValidator")
+            .field("ty", &type_name::<T>())
+            .finish()
+    }
+}
+
+impl<T: Ty> Validator for StaticValidator<T> {
+    fn validate(&self, val: Value) -> Result<ConfigData> {
+        let val = <T as Ty>::from_value(val)?;
+        Ok(ConfigData::new(val))
+    }
+}
+
+pub struct TyValidator<F, T: Ty> {
+    pub(super) ty: PhantomData<fn(&T)>,
+    f: F,
+}
+
+impl<T: Ty, F> Debug for TyValidator<F, T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("TyValidator")
+            .field("ty", &type_name::<T>())
+            .finish()
+    }
+}
+
+impl<T, F> Validator for TyValidator<F, T>
+where
+    T: Ty,
+    F: Fn(&T) -> anyhow::Result<()> + 'static,
+{
+    fn validate(&self, val: Value) -> Result<ConfigData> {
+        let val = <T as Ty>::from_value(val)?;
+        (self.f)(&val)?;
+        Ok(ConfigData::new(val))
+    }
+}
+
+pub fn ty_validator<T, F>(f: F) -> impl Validator
+where
+    T: Ty,
+    F: Fn(&T) -> anyhow::Result<()> + 'static,
+{
+    TyValidator { ty: PhantomData, f }
+}
+
+pub fn regex_str_validator() -> impl Validator {
+    ty_validator(|val: &crate::String| {
+        regex_syntax::parse(val)?;
+        Ok(())
+    })
+}
--- a/helix-config/src/value.rs
+++ b/helix-config/src/value.rs
@@ -0,0 +1,448 @@
+use std::fmt::Display;
+
+use indexmap::IndexMap;
+use serde::de::DeserializeOwned;
+use serde::ser::{Error as _, Impossible};
+use serde::{Deserialize, Serialize};
+use serde_json::{Error, Result};
+
+use crate::Ty;
+
+#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum Value {
+    List(Vec<Value>),
+    Map(Box<IndexMap<Box<str>, Value, ahash::RandomState>>),
+    Int(isize),
+    Float(f64),
+    Bool(bool),
+    String(String),
+    Null,
+}
+
+impl Value {
+    pub fn typed<T: Ty>(self) -> anyhow::Result<T> {
+        T::from_value(self)
+    }
+
+    pub fn append(&mut self, val: Value, depth: usize) {
+        match (self, val) {
+            (Value::List(dst), Value::List(ref mut val)) => dst.append(val),
+            (Value::Map(dst), Value::Map(val)) if depth == 0 || dst.is_empty() => {
+                dst.extend(val.into_iter())
+            }
+            (Value::Map(dst), Value::Map(val)) => {
+                dst.reserve(val.len());
+                for (k, v) in val.into_iter() {
+                    // we don't use the entry api because we want
+                    // to maintain thhe ordering
+                    let merged = match dst.shift_remove(&k) {
+                        Some(mut old) => {
+                            old.append(v, depth - 1);
+                            old
+                        }
+                        None => v,
+                    };
+                    dst.insert(k, merged);
+                }
+            }
+            (dst, val) => *dst = val,
+        }
+    }
+}
+
+impl From<&str> for Value {
+    fn from(value: &str) -> Self {
+        Value::String(value.to_owned())
+    }
+}
+
+macro_rules! from_int {
+    ($($ty: ident),*) => {
+        $(
+            impl From<$ty> for Value {
+                fn from(value: $ty) -> Self {
+                    Value::Int(value.try_into().unwrap())
+                }
+            }
+        )*
+    };
+}
+
+impl From<serde_json::Value> for Value {
+    fn from(value: serde_json::Value) -> Self {
+        to_value(value).unwrap()
+    }
+}
+impl From<&serde_json::Value> for Value {
+    fn from(value: &serde_json::Value) -> Self {
+        to_value(value).unwrap()
+    }
+}
+
+impl From<Value> for serde_json::Value {
+    fn from(value: Value) -> Self {
+        serde_json::to_value(value).unwrap()
+    }
+}
+
+from_int!(isize, usize, u32, i32, i16, u16, i8, u8);
+
+pub fn to_value<T>(value: T) -> Result<Value>
+where
+    T: Serialize,
+{
+    value.serialize(Serializer)
+}
+
+pub fn from_value<T>(value: Value) -> Result<T>
+where
+    T: DeserializeOwned,
+{
+    // roundtripping trough json is very inefficient *and incorrect* (captures
+    // json semantics that don't apply to us)
+    // TODO: implement a custom deserializer just like serde_json does
+    serde_json::from_value(value.into())
+}
+
+// We only use our own error type; no need for From conversions provided by the
+// standard library's try! macro. This reduces lines of LLVM IR by 4%.
+macro_rules! tri {
+    ($e:expr $(,)?) => {
+        match $e {
+            core::result::Result::Ok(val) => val,
+            core::result::Result::Err(err) => return core::result::Result::Err(err),
+        }
+    };
+}
+
+/// Serializer whose output is a `Value`.
+///
+/// This is the serializer that backs [`serde_json::to_value`][crate::to_value].
+/// Unlike the main serde_json serializer which goes from some serializable
+/// value of type `T` to JSON text, this one goes from `T` to
+/// `serde_json::Value`.
+///
+/// The `to_value` function is implementable as:
+///
+/// ```
+/// use serde::Serialize;
+/// use serde_json::{Error, Value};
+///
+/// pub fn to_value<T>(input: T) -> Result<Value, Error>
+/// where
+///     T: Serialize,
+/// {
+///     input.serialize(serde_json::value::Serializer)
+/// }
+/// ```
+pub struct Serializer;
+
+impl serde::Serializer for Serializer {
+    type Ok = Value;
+    type Error = Error;
+
+    type SerializeSeq = SerializeVec;
+    type SerializeTuple = SerializeVec;
+    type SerializeTupleStruct = SerializeVec;
+    type SerializeTupleVariant = Impossible<Value, Error>;
+    type SerializeMap = SerializeMap;
+    type SerializeStruct = SerializeMap;
+    type SerializeStructVariant = Impossible<Value, Error>;
+
+    #[inline]
+    fn serialize_bool(self, value: bool) -> Result<Value> {
+        Ok(Value::Bool(value))
+    }
+
+    #[inline]
+    fn serialize_i8(self, value: i8) -> Result<Value> {
+        self.serialize_i64(value as i64)
+    }
+
+    #[inline]
+    fn serialize_i16(self, value: i16) -> Result<Value> {
+        self.serialize_i64(value as i64)
+    }
+
+    #[inline]
+    fn serialize_i32(self, value: i32) -> Result<Value> {
+        self.serialize_i64(value as i64)
+    }
+
+    fn serialize_i64(self, value: i64) -> Result<Value> {
+        Ok(Value::Int(value.try_into().unwrap()))
+    }
+
+    fn serialize_i128(self, _value: i128) -> Result<Value> {
+        unreachable!()
+    }
+
+    #[inline]
+    fn serialize_u8(self, value: u8) -> Result<Value> {
+        self.serialize_u64(value as u64)
+    }
+
+    #[inline]
+    fn serialize_u16(self, value: u16) -> Result<Value> {
+        self.serialize_u64(value as u64)
+    }
+
+    #[inline]
+    fn serialize_u32(self, value: u32) -> Result<Value> {
+        self.serialize_u64(value as u64)
+    }
+
+    #[inline]
+    fn serialize_u64(self, value: u64) -> Result<Value> {
+        Ok(Value::Int(value.try_into().unwrap()))
+    }
+
+    fn serialize_u128(self, _value: u128) -> Result<Value> {
+        unreachable!()
+    }
+
+    #[inline]
+    fn serialize_f32(self, float: f32) -> Result<Value> {
+        Ok(Value::Float(float as f64))
+    }
+
+    #[inline]
+    fn serialize_f64(self, float: f64) -> Result<Value> {
+        Ok(Value::Float(float))
+    }
+
+    #[inline]
+    fn serialize_char(self, value: char) -> Result<Value> {
+        let mut s = String::new();
+        s.push(value);
+        Ok(Value::String(s))
+    }
+
+    #[inline]
+    fn serialize_str(self, value: &str) -> Result<Value> {
+        Ok(Value::String(value.into()))
+    }
+
+    fn serialize_bytes(self, value: &[u8]) -> Result<Value> {
+        let vec = value.iter().map(|&b| Value::Int(b.into())).collect();
+        Ok(Value::List(vec))
+    }
+
+    #[inline]
+    fn serialize_unit(self) -> Result<Value> {
+        Ok(Value::Null)
+    }
+
+    #[inline]
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Value> {
+        unimplemented!()
+    }
+
+    #[inline]
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Value> {
+        self.serialize_str(variant)
+    }
+
+    #[inline]
+    fn serialize_newtype_struct<T>(self, _name: &'static str, _value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        unimplemented!()
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        unimplemented!()
+    }
+
+    #[inline]
+    fn serialize_none(self) -> Result<Value> {
+        self.serialize_unit()
+    }
+
+    #[inline]
+    fn serialize_some<T>(self, value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
+        Ok(SerializeVec {
+            vec: Vec::with_capacity(len.unwrap_or(0)),
+        })
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleStruct> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant> {
+        unimplemented!()
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
+        Ok(SerializeMap {
+            map: IndexMap::default(),
+            next_key: None,
+        })
+    }
+
+    fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
+        unreachable!()
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant> {
+        unreachable!()
+    }
+
+    fn collect_str<T>(self, value: &T) -> Result<Value>
+    where
+        T: ?Sized + Display,
+    {
+        Ok(Value::String(value.to_string()))
+    }
+}
+
+pub struct SerializeVec {
+    vec: Vec<Value>,
+}
+
+impl serde::ser::SerializeSeq for SerializeVec {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        self.vec.push(tri!(to_value(value)));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Value> {
+        Ok(Value::List(self.vec))
+    }
+}
+
+impl serde::ser::SerializeTuple for SerializeVec {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Value> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+impl serde::ser::SerializeTupleStruct for SerializeVec {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Value> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+pub struct SerializeMap {
+    map: IndexMap<Box<str>, Value, ahash::RandomState>,
+    next_key: Option<Box<str>>,
+}
+
+impl serde::ser::SerializeMap for SerializeMap {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_key<T>(&mut self, key: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        let key = to_value(key)?;
+        let Value::String(val) = key else {
+            return Err(Error::custom("only string keys are supported"));
+        };
+        self.next_key = Some(val.into_boxed_str());
+        Ok(())
+    }
+
+    fn serialize_value<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        let key = self.next_key.take();
+        // Panic because this indicates a bug in the program rather than an
+        // expected failure.
+        let key = key.expect("serialize_value called before serialize_key");
+        self.map.insert(key, tri!(to_value(value)));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Value> {
+        Ok(Value::Map(Box::new(self.map)))
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeMap {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        serde::ser::SerializeMap::serialize_entry(self, key, value)
+    }
+
+    fn end(self) -> Result<Value> {
+        serde::ser::SerializeMap::end(self)
+    }
+}
--- a/helix-core/Cargo.toml
+++ b/helix-core/Cargo.toml
@@ -17,6 +17,7 @@ integration = []

 [dependencies]
 helix-loader = { path = "../helix-loader" }
+helix-config = { path = "../helix-config" }

 ropey = { version = "1.6.1", default-features = false, features = ["simd"] }
 smallvec = "1.11"
@@ -51,6 +52,8 @@ textwrap = "0.16.0"

 nucleo.workspace = true
 parking_lot = "0.12"
+anyhow = "1.0.79"
+indexmap = { version = "2.1.0", features = ["serde"] }

 [dev-dependencies]
 quickcheck = { version = "1", default-features = false }
--- a/helix-core/src/auto_pairs.rs
+++ b/helix-core/src/auto_pairs.rs
@@ -2,8 +2,10 @@
 //! this module provides the functionality to insert the paired closing character.

 use crate::{graphemes, movement::Direction, Range, Rope, Selection, Tendril, Transaction};
-use std::collections::HashMap;

+use anyhow::{bail, ensure};
+use helix_config::options;
+use indexmap::IndexMap;
 use smallvec::SmallVec;

 // Heavily based on https://github.com/codemirror/closebrackets/
@@ -19,7 +21,7 @@ pub const DEFAULT_PAIRS: &[(char, char)] = &[
 /// The type that represents the collection of auto pairs,
 /// keyed by both opener and closer.
 #[derive(Debug, Clone)]
-pub struct AutoPairs(HashMap<char, Pair>);
+pub struct AutoPairs(IndexMap<char, Pair, ahash::RandomState>);

 /// Represents the config for a particular pairing.
 #[derive(Debug, Clone, Copy)]
@@ -75,15 +77,15 @@ impl From<(&char, &char)> for Pair {

 impl AutoPairs {
    /// Make a new AutoPairs set with the given pairs and default conditions.
-    pub fn new<'a, V: 'a, A>(pairs: V) -> Self
+    pub fn new<'a, V: 'a, A>(pairs: V) -> anyhow::Result<Self>
    where
-        V: IntoIterator<Item = A>,
+        V: IntoIterator<Item = anyhow::Result<A>>,
        A: Into<Pair>,
    {
-        let mut auto_pairs = HashMap::new();
+        let mut auto_pairs = IndexMap::default();

        for pair in pairs.into_iter() {
-            let auto_pair = pair.into();
+            let auto_pair = pair?.into();

            auto_pairs.insert(auto_pair.open, auto_pair);

@@ -92,7 +94,7 @@ impl AutoPairs {
            }
        }

-        Self(auto_pairs)
+        Ok(Self(auto_pairs))
    }

    pub fn get(&self, ch: char) -> Option<&Pair> {
@@ -102,7 +104,7 @@ impl AutoPairs {

 impl Default for AutoPairs {
    fn default() -> Self {
-        AutoPairs::new(DEFAULT_PAIRS.iter())
+        AutoPairs::new(DEFAULT_PAIRS.iter().map(Ok)).unwrap()
    }
 }

@@ -371,3 +373,43 @@ fn handle_same(doc: &Rope, selection: &Selection, pair: &Pair) -> Transaction {
    log::debug!("auto pair transaction: {:#?}", t);
    t
 }
+
+options! {
+    struct AutopairConfig {
+        /// Mapping of character pairs like `{ '(' = ')', '`' = '`' }` that are
+        /// automatically closed by the editor when typed.
+        auto_pairs: AutoPairs = AutoPairs::default(),
+    }
+}
+
+impl helix_config::Ty for AutoPairs {
+    fn from_value(val: helix_config::Value) -> anyhow::Result<Self> {
+        let map = match val {
+            helix_config::Value::Map(map) => map,
+            helix_config::Value::Bool(false) => return Ok(Self(IndexMap::default())),
+            _ => bail!("expect 'false' or a map of pairs"),
+        };
+        let pairs = map.into_iter().map(|(open, close)| {
+            let open = helix_config::Value::String(open.into_string());
+            Ok(Pair {
+                open: open.typed()?,
+                close: close.typed()?,
+            })
+        });
+        AutoPairs::new(pairs)
+    }
+
+    fn to_value(&self) -> helix_config::Value {
+        let map = self
+            .0
+            .values()
+            .map(|pair| {
+                (
+                    pair.open.to_string().into(),
+                    helix_config::Value::String(pair.close.into()),
+                )
+            })
+            .collect();
+        helix_config::Value::Map(Box::new(map))
+    }
+}
--- a/helix-core/src/config.rs
+++ b/helix-core/src/config.rs
@@ -1,10 +0,0 @@
-/// Syntax configuration loader based on built-in languages.toml.
-pub fn default_syntax_loader() -> crate::syntax::Configuration {
-    helix_loader::config::default_lang_config()
-        .try_into()
-        .expect("Could not serialize built-in languages.toml")
-}
-/// Syntax configuration loader based on user configured languages.toml.
-pub fn user_syntax_loader() -> Result<crate::syntax::Configuration, toml::de::Error> {
-    helix_loader::config::user_lang_config()?.try_into()
-}
--- a/helix-core/src/indent.rs
+++ b/helix-core/src/indent.rs
@@ -1,16 +1,36 @@
 use std::{borrow::Cow, collections::HashMap};

+use anyhow::{anyhow, bail};
+use helix_config::{config_serde_adapter, options, IntegerRangeValidator};
+use serde::{Deserialize, Serialize};
 use tree_sitter::{Query, QueryCursor, QueryPredicateArg};

 use crate::{
    chars::{char_is_line_ending, char_is_whitespace},
    find_first_non_whitespace_char,
    graphemes::{grapheme_width, tab_width_at},
-    syntax::{IndentationHeuristic, LanguageConfiguration, RopeProvider, Syntax},
+    syntax::{LanguageConfiguration, RopeProvider, Syntax},
    tree_sitter::Node,
    Position, Rope, RopeGraphemes, RopeSlice,
 };

+/// How the indentation for a newly inserted line should be determined.
+/// If the selected heuristic is not available (e.g. because the current
+/// language has no tree-sitter indent queries), a simpler one will be used.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum IndentationHeuristic {
+    /// Just copy the indentation of the line that the cursor is currently on.
+    Simple,
+    /// Use tree-sitter indent queries to compute the expected absolute indentation level of the new line.
+    TreeSitter,
+    /// Use tree-sitter indent queries to compute the expected difference in indentation between the new line
+    /// and the line before. Add this to the actual indentation level of the line before.
+    #[default]
+    Hybrid,
+}
+config_serde_adapter!(IndentationHeuristic);
+
 /// Enum representing indentation style.
 ///
 /// Only values 1-8 are valid for the `Spaces` variant.
@@ -20,6 +40,50 @@ pub enum IndentStyle {
    Spaces(u8),
 }

+options! {
+    struct IndentationConfig {
+        /// The number columns that a tabs are aligned to.
+        #[name = "ident.tab_width"]
+        #[read = copy]
+        tab_width: usize = 4,
+        /// Indentation inserted/removed into the document when indenting/dedenting.
+        /// This can be set to an integer representing N spaces or "tab" for tabs.
+        #[name = "ident.unit"]
+        #[read = copy]
+        indent_style: IndentStyle = IndentStyle::Tabs,
+        /// How the indentation for a newly  inserted line is computed:
+        /// `simple` just copies the indentation level from the previous line,
+        /// `tree-sitter` computes the indentation based on the syntax tree and
+        /// `hybrid` combines both approaches.
+        /// If the chosen heuristic is not available, a different one will
+        /// be used as a fallback (the fallback order being `hybrid` ->
+        /// `tree-sitter` -> `simple`).
+        #[read = copy]
+        indent_heuristic: IndentationHeuristic = IndentationHeuristic::Hybrid
+    }
+}
+
+impl helix_config::Ty for IndentStyle {
+    fn from_value(val: helix_config::Value) -> anyhow::Result<Self> {
+        match val {
+            helix_config::Value::String(s) if s == "t" || s == "tab" => Ok(IndentStyle::Tabs),
+            helix_config::Value::Int(_) => {
+                let spaces = IntegerRangeValidator::new(0, MAX_INDENT)
+                    .validate(val)
+                    .map_err(|err| anyhow!("invalid number of spaces! {err}"))?;
+                Ok(IndentStyle::Spaces(spaces))
+            }
+            _ => bail!("expected an integer (spaces) or 'tab'"),
+        }
+    }
+    fn to_value(&self) -> helix_config::Value {
+        match *self {
+            IndentStyle::Tabs => helix_config::Value::String("tab".into()),
+            IndentStyle::Spaces(spaces) => helix_config::Value::Int(spaces as _),
+        }
+    }
+}
+
 // 16 spaces
 const INDENTS: &str = "                ";
 pub const MAX_INDENT: u8 = 16;
--- a/helix-core/src/lib.rs
+++ b/helix-core/src/lib.rs
@@ -3,7 +3,6 @@ pub use encoding_rs as encoding;
 pub mod auto_pairs;
 pub mod chars;
 pub mod comment;
-pub mod config;
 pub mod diagnostic;
 pub mod diff;
 pub mod doc_formatter;
@@ -36,6 +35,7 @@ pub mod unicode {
    pub use unicode_width as width;
 }

+use helix_config::OptionRegistry;
 pub use helix_loader::find_workspace;

 pub fn find_first_non_whitespace_char(line: RopeSlice) -> Option<usize> {
@@ -70,3 +70,9 @@ pub use diagnostic::Diagnostic;

 pub use line_ending::{LineEnding, NATIVE_LINE_ENDING};
 pub use transaction::{Assoc, Change, ChangeSet, Deletion, Operation, Transaction};
+
+pub fn init_config(registry: &mut OptionRegistry) {
+    line_ending::init_config(registry);
+    auto_pairs::init_config(registry);
+    indent::init_config(registry);
+}
--- a/helix-core/src/line_ending.rs
+++ b/helix-core/src/line_ending.rs
@@ -1,3 +1,6 @@
+use anyhow::bail;
+use helix_config::{options, Ty};
+
 use crate::{Rope, RopeSlice};

 #[cfg(target_os = "windows")]
@@ -5,6 +8,61 @@ pub const NATIVE_LINE_ENDING: LineEnding = LineEnding::Crlf;
 #[cfg(not(target_os = "windows"))]
 pub const NATIVE_LINE_ENDING: LineEnding = LineEnding::LF;

+options! {
+    struct LineEndingConfig {
+        /// The line ending to use for new documents. Can be `lf` or `crlf`. If
+        /// helix was compiled with the `unicode-lines` feature then `vt`, `ff`,
+        /// `cr`, `nel`, `ls` or `ps` are also allowed.
+        #[read = copy]
+        default_line_ending: LineEnding = NATIVE_LINE_ENDING,
+    }
+}
+
+impl Ty for LineEnding {
+    fn from_value(val: helix_config::Value) -> anyhow::Result<Self> {
+        let val: String = val.typed()?;
+        match &*val {
+            "crlf" => Ok(LineEnding::Crlf),
+            "lf" => Ok(LineEnding::LF),
+            #[cfg(feature = "unicode-lines")]
+            "vt" => Ok(LineEnding::VT),
+            #[cfg(feature = "unicode-lines")]
+            "ff" => Ok(LineEnding::FF),
+            #[cfg(feature = "unicode-lines")]
+            "cr" => Ok(LineEnding::CR),
+            #[cfg(feature = "unicode-lines")]
+            "nel" => Ok(LineEnding::Nel),
+            #[cfg(feature = "unicode-lines")]
+            "ls" => Ok(LineEnding::LS),
+            #[cfg(feature = "unicode-lines")]
+            "ps" => Ok(LineEnding::PS),
+            #[cfg(feature = "unicode-lines")]
+            _ => bail!("expecte one of 'lf', 'crlf', 'vt', 'ff', 'cr', 'nel', 'ls' or 'ps'"),
+            #[cfg(not(feature = "unicode-lines"))]
+            _ => bail!("expecte one of 'lf' or 'crlf'"),
+        }
+    }
+
+    fn to_value(&self) -> helix_config::Value {
+        match self {
+            LineEnding::Crlf => "crlf".into(),
+            LineEnding::LF => "lf".into(),
+            #[cfg(feature = "unicode-lines")]
+            VT => "vt".into(),
+            #[cfg(feature = "unicode-lines")]
+            FF => "ff".into(),
+            #[cfg(feature = "unicode-lines")]
+            CR => "cr".into(),
+            #[cfg(feature = "unicode-lines")]
+            Nel => "nel".into(),
+            #[cfg(feature = "unicode-lines")]
+            LS => "ls".into(),
+            #[cfg(feature = "unicode-lines")]
+            PS => "ps".into(),
+        }
+    }
+}
+
 /// Represents one of the valid Unicode line endings.
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
 pub enum LineEnding {
--- a/helix-core/src/syntax.rs
+++ b/helix-core/src/syntax.rs
@@ -84,422 +84,8 @@ pub struct Configuration {

 impl Default for Configuration {
    fn default() -> Self {
-        crate::config::default_syntax_loader()
-    }
-}
-
-// largely based on tree-sitter/cli/src/loader.rs
-#[derive(Debug, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", deny_unknown_fields)]
-pub struct LanguageConfiguration {
-    #[serde(rename = "name")]
-    pub language_id: String, // c-sharp, rust, tsx
-    #[serde(rename = "language-id")]
-    // see the table under https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentItem
-    pub language_server_language_id: Option<String>, // csharp, rust, typescriptreact, for the language-server
-    pub scope: String,             // source.rust
-    pub file_types: Vec<FileType>, // filename extension or ends_with? <Gemfile, rb, etc>
-    #[serde(default)]
-    pub shebangs: Vec<String>, // interpreter(s) associated with language
-    #[serde(default)]
-    pub roots: Vec<String>, // these indicate project roots <.git, Cargo.toml>
-    pub comment_token: Option<String>,
-    pub text_width: Option<usize>,
-    pub soft_wrap: Option<SoftWrap>,
-
-    #[serde(default)]
-    pub auto_format: bool,
-
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub formatter: Option<FormatterConfiguration>,
-
-    #[serde(default)]
-    pub diagnostic_severity: Severity,
-
-    pub grammar: Option<String>, // tree-sitter grammar name, defaults to language_id
-
-    // content_regex
-    #[serde(default, skip_serializing, deserialize_with = "deserialize_regex")]
-    pub injection_regex: Option<Regex>,
-    // first_line_regex
-    //
-    #[serde(skip)]
-    pub(crate) highlight_config: OnceCell<Option<Arc<HighlightConfiguration>>>,
-    // tags_config OnceCell<> https://github.com/tree-sitter/tree-sitter/pull/583
-    #[serde(
-        default,
-        skip_serializing_if = "Vec::is_empty",
-        serialize_with = "serialize_lang_features",
-        deserialize_with = "deserialize_lang_features"
-    )]
-    pub language_servers: Vec<LanguageServerFeatures>,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub indent: Option<IndentationConfiguration>,
-
-    #[serde(skip)]
-    pub(crate) indent_query: OnceCell<Option<Query>>,
-    #[serde(skip)]
-    pub(crate) textobject_query: OnceCell<Option<TextObjectQuery>>,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub debugger: Option<DebugAdapterConfig>,
-
-    /// Automatic insertion of pairs to parentheses, brackets,
-    /// etc. Defaults to true. Optionally, this can be a list of 2-tuples
-    /// to specify a list of characters to pair. This overrides the
-    /// global setting.
-    #[serde(default, skip_serializing, deserialize_with = "deserialize_auto_pairs")]
-    pub auto_pairs: Option<AutoPairs>,
-
-    pub rulers: Option<Vec<u16>>, // if set, override editor's rulers
-
-    /// Hardcoded LSP root directories relative to the workspace root, like `examples` or `tools/fuzz`.
-    /// Falling back to the current working directory if none are configured.
-    pub workspace_lsp_roots: Option<Vec<PathBuf>>,
-    #[serde(default)]
-    pub persistent_diagnostic_sources: Vec<String>,
-}
-
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub enum FileType {
-    /// The extension of the file, either the `Path::extension` or the full
-    /// filename if the file does not have an extension.
-    Extension(String),
-    /// The suffix of a file. This is compared to a given file's absolute
-    /// path, so it can be used to detect files based on their directories.
-    Suffix(String),
-}
-
-impl Serialize for FileType {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        use serde::ser::SerializeMap;
-
-        match self {
-            FileType::Extension(extension) => serializer.serialize_str(extension),
-            FileType::Suffix(suffix) => {
-                let mut map = serializer.serialize_map(Some(1))?;
-                map.serialize_entry("suffix", &suffix.replace(std::path::MAIN_SEPARATOR, "/"))?;
-                map.end()
-            }
-        }
-    }
-}
-
-impl<'de> Deserialize<'de> for FileType {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: serde::de::Deserializer<'de>,
-    {
-        struct FileTypeVisitor;
-
-        impl<'de> serde::de::Visitor<'de> for FileTypeVisitor {
-            type Value = FileType;
-
-            fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
-                formatter.write_str("string or table")
-            }
-
-            fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
-            where
-                E: serde::de::Error,
-            {
-                Ok(FileType::Extension(value.to_string()))
-            }
-
-            fn visit_map<M>(self, mut map: M) -> Result<Self::Value, M::Error>
-            where
-                M: serde::de::MapAccess<'de>,
-            {
-                match map.next_entry::<String, String>()? {
-                    Some((key, suffix)) if key == "suffix" => Ok(FileType::Suffix({
-                        suffix.replace('/', std::path::MAIN_SEPARATOR_STR)
-                    })),
-                    Some((key, _value)) => Err(serde::de::Error::custom(format!(
-                        "unknown key in `file-types` list: {}",
-                        key
-                    ))),
-                    None => Err(serde::de::Error::custom(
-                        "expected a `suffix` key in the `file-types` entry",
-                    )),
-                }
-            }
-        }
-
-        deserializer.deserialize_any(FileTypeVisitor)
-    }
-}
-
-#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq, Hash)]
-#[serde(rename_all = "kebab-case")]
-pub enum LanguageServerFeature {
-    Format,
-    GotoDeclaration,
-    GotoDefinition,
-    GotoTypeDefinition,
-    GotoReference,
-    GotoImplementation,
-    // Goto, use bitflags, combining previous Goto members?
-    SignatureHelp,
-    Hover,
-    DocumentHighlight,
-    Completion,
-    CodeAction,
-    WorkspaceCommand,
-    DocumentSymbols,
-    WorkspaceSymbols,
-    // Symbols, use bitflags, see above?
-    Diagnostics,
-    RenameSymbol,
-    InlayHints,
-}
-
-impl Display for LanguageServerFeature {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        use LanguageServerFeature::*;
-        let feature = match self {
-            Format => "format",
-            GotoDeclaration => "goto-declaration",
-            GotoDefinition => "goto-definition",
-            GotoTypeDefinition => "goto-type-definition",
-            GotoReference => "goto-type-definition",
-            GotoImplementation => "goto-implementation",
-            SignatureHelp => "signature-help",
-            Hover => "hover",
-            DocumentHighlight => "document-highlight",
-            Completion => "completion",
-            CodeAction => "code-action",
-            WorkspaceCommand => "workspace-command",
-            DocumentSymbols => "document-symbols",
-            WorkspaceSymbols => "workspace-symbols",
-            Diagnostics => "diagnostics",
-            RenameSymbol => "rename-symbol",
-            InlayHints => "inlay-hints",
-        };
-        write!(f, "{feature}",)
-    }
-}
-
-#[derive(Debug, Serialize, Deserialize)]
-#[serde(untagged, rename_all = "kebab-case", deny_unknown_fields)]
-enum LanguageServerFeatureConfiguration {
-    #[serde(rename_all = "kebab-case")]
-    Features {
-        #[serde(default, skip_serializing_if = "HashSet::is_empty")]
-        only_features: HashSet<LanguageServerFeature>,
-        #[serde(default, skip_serializing_if = "HashSet::is_empty")]
-        except_features: HashSet<LanguageServerFeature>,
-        name: String,
-    },
-    Simple(String),
-}
-
-#[derive(Debug, Default)]
-pub struct LanguageServerFeatures {
-    pub name: String,
-    pub only: HashSet<LanguageServerFeature>,
-    pub excluded: HashSet<LanguageServerFeature>,
-}
-
-impl LanguageServerFeatures {
-    pub fn has_feature(&self, feature: LanguageServerFeature) -> bool {
-        (self.only.is_empty() || self.only.contains(&feature)) && !self.excluded.contains(&feature)
-    }
-}
-
-fn deserialize_lang_features<'de, D>(
-    deserializer: D,
-) -> Result<Vec<LanguageServerFeatures>, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    let raw: Vec<LanguageServerFeatureConfiguration> = Deserialize::deserialize(deserializer)?;
-    let res = raw
-        .into_iter()
-        .map(|config| match config {
-            LanguageServerFeatureConfiguration::Simple(name) => LanguageServerFeatures {
-                name,
-                ..Default::default()
-            },
-            LanguageServerFeatureConfiguration::Features {
-                only_features,
-                except_features,
-                name,
-            } => LanguageServerFeatures {
-                name,
-                only: only_features,
-                excluded: except_features,
-            },
-        })
-        .collect();
-    Ok(res)
-}
-fn serialize_lang_features<S>(
-    map: &Vec<LanguageServerFeatures>,
-    serializer: S,
-) -> Result<S::Ok, S::Error>
-where
-    S: serde::Serializer,
-{
-    let mut serializer = serializer.serialize_seq(Some(map.len()))?;
-    for features in map {
-        let features = if features.only.is_empty() && features.excluded.is_empty() {
-            LanguageServerFeatureConfiguration::Simple(features.name.to_owned())
-        } else {
-            LanguageServerFeatureConfiguration::Features {
-                only_features: features.only.clone(),
-                except_features: features.excluded.clone(),
-                name: features.name.to_owned(),
-            }
-        };
-        serializer.serialize_element(&features)?;
-    }
-    serializer.end()
-}
-
-#[derive(Debug, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub struct LanguageServerConfiguration {
-    pub command: String,
-    #[serde(default)]
-    #[serde(skip_serializing_if = "Vec::is_empty")]
-    pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "HashMap::is_empty")]
-    pub environment: HashMap<String, String>,
-    #[serde(default, skip_serializing, deserialize_with = "deserialize_lsp_config")]
-    pub config: Option<serde_json::Value>,
-    #[serde(default = "default_timeout")]
-    pub timeout: u64,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub struct FormatterConfiguration {
-    pub command: String,
-    #[serde(default)]
-    #[serde(skip_serializing_if = "Vec::is_empty")]
-    pub args: Vec<String>,
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
-#[serde(rename_all = "kebab-case")]
-pub struct AdvancedCompletion {
-    pub name: Option<String>,
-    pub completion: Option<String>,
-    pub default: Option<String>,
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
-#[serde(rename_all = "kebab-case", untagged)]
-pub enum DebugConfigCompletion {
-    Named(String),
-    Advanced(AdvancedCompletion),
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
-#[serde(untagged)]
-pub enum DebugArgumentValue {
-    String(String),
-    Array(Vec<String>),
-    Boolean(bool),
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
-#[serde(rename_all = "kebab-case")]
-pub struct DebugTemplate {
-    pub name: String,
-    pub request: String,
-    pub completion: Vec<DebugConfigCompletion>,
-    pub args: HashMap<String, DebugArgumentValue>,
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
-#[serde(rename_all = "kebab-case")]
-pub struct DebugAdapterConfig {
-    pub name: String,
-    pub transport: String,
-    #[serde(default)]
-    pub command: String,
-    #[serde(default)]
-    pub args: Vec<String>,
-    pub port_arg: Option<String>,
-    pub templates: Vec<DebugTemplate>,
-    #[serde(default)]
-    pub quirks: DebuggerQuirks,
-}
-
-// Different workarounds for adapters' differences
-#[derive(Debug, Default, PartialEq, Eq, Clone, Serialize, Deserialize)]
-pub struct DebuggerQuirks {
-    #[serde(default)]
-    pub absolute_paths: bool,
-}
-
-#[derive(Debug, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub struct IndentationConfiguration {
-    #[serde(deserialize_with = "deserialize_tab_width")]
-    pub tab_width: usize,
-    pub unit: String,
-}
-
-/// How the indentation for a newly inserted line should be determined.
-/// If the selected heuristic is not available (e.g. because the current
-/// language has no tree-sitter indent queries), a simpler one will be used.
-#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum IndentationHeuristic {
-    /// Just copy the indentation of the line that the cursor is currently on.
-    Simple,
-    /// Use tree-sitter indent queries to compute the expected absolute indentation level of the new line.
-    TreeSitter,
-    /// Use tree-sitter indent queries to compute the expected difference in indentation between the new line
-    /// and the line before. Add this to the actual indentation level of the line before.
-    #[default]
-    Hybrid,
-}
-
-/// Configuration for auto pairs
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", deny_unknown_fields, untagged)]
-pub enum AutoPairConfig {
-    /// Enables or disables auto pairing. False means disabled. True means to use the default pairs.
-    Enable(bool),
-
-    /// The mappings of pairs.
-    Pairs(HashMap<char, char>),
-}
-
-impl Default for AutoPairConfig {
-    fn default() -> Self {
-        AutoPairConfig::Enable(true)
-    }
-}
-
-impl From<&AutoPairConfig> for Option<AutoPairs> {
-    fn from(auto_pair_config: &AutoPairConfig) -> Self {
-        match auto_pair_config {
-            AutoPairConfig::Enable(false) => None,
-            AutoPairConfig::Enable(true) => Some(AutoPairs::default()),
-            AutoPairConfig::Pairs(pairs) => Some(AutoPairs::new(pairs.iter())),
-        }
-    }
-}
-
-impl From<AutoPairConfig> for Option<AutoPairs> {
-    fn from(auto_pairs_config: AutoPairConfig) -> Self {
-        (&auto_pairs_config).into()
-    }
-}
-
-impl FromStr for AutoPairConfig {
-    type Err = std::str::ParseBoolError;
-
-    // only do bool parsing for runtime setting
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let enable: bool = s.parse()?;
-        Ok(AutoPairConfig::Enable(enable))
+        todo!()
+        // crate::config::default_syntax_loader()
    }
 }

@@ -700,10 +286,6 @@ impl LanguageConfiguration {
            .as_ref()
    }

-    pub fn scope(&self) -> &str {
-        &self.scope
-    }
-
    fn load_query(&self, kind: &str) -> Option<Query> {
        let query_text = read_query(&self.language_id, kind);
        if query_text.is_empty() {
@@ -722,6 +304,7 @@ impl LanguageConfiguration {
            .ok()
    }
 }
+
 #[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case", deny_unknown_fields)]
 pub struct SoftWrap {
@@ -848,13 +431,6 @@ impl Loader {
        configuration_id.and_then(|&id| self.language_configs.get(id).cloned())
    }

-    pub fn language_config_for_scope(&self, scope: &str) -> Option<Arc<LanguageConfiguration>> {
-        self.language_configs
-            .iter()
-            .find(|config| config.scope == scope)
-            .cloned()
-    }
-
    pub fn language_config_for_language_id(&self, id: &str) -> Option<Arc<LanguageConfiguration>> {
        self.language_configs
            .iter()
--- a/helix-dap/Cargo.toml
+++ b/helix-dap/Cargo.toml
@@ -14,6 +14,7 @@ homepage.workspace = true

 [dependencies]
 helix-core = { path = "../helix-core" }
+helix-config = { path = "../helix-config" }

 anyhow = "1.0"
 log = "0.4"
--- a/helix-dap/src/config.rs
+++ b/helix-dap/src/config.rs
@@ -0,0 +1,146 @@
+use anyhow::bail;
+use helix_config::*;
+use serde::{Deserialize, Serialize};
+
+options! {
+    struct DebugAdapterConfig {
+        #[name = "debugger.name"]
+        name: Option<String> = None,
+        #[name = "debugger.transport"]
+        #[read = copy]
+        transport: Transport = Transport::Stdio,
+        #[name = "debugger.command"]
+        #[read = deref]
+        command: String = "",
+        #[name = "debugger.args"]
+        #[read = deref]
+        args: List<String> = List::default(),
+        #[name = "debugger.port-arg"]
+        #[read = deref]
+        port_arg: String = "",
+        #[name = "debugger.templates"]
+        #[read = deref]
+        templates: List<DebugTemplate> = List::default(),
+        #[name = "debugger.quirks.absolut-path"]
+        #[read = copy]
+        absolut_path: bool = false,
+        #[name = "terminal.command"]
+        terminal_command: Option<String> = get_terminal_provider().map(|term| term.command),
+        #[name = "terminal.args"]
+        #[read = deref]
+        terminal_args: List<String> = get_terminal_provider().map(|term| term.args.into_boxed_slice()).unwrap_or_default(),
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+pub enum Transport {
+    Stdio,
+    Tcp,
+}
+
+impl Ty for Transport {
+    fn from_value(val: Value) -> anyhow::Result<Self> {
+        match &*String::from_value(val)? {
+            "stdio" => Ok(Transport::Stdio),
+            "tcp" => Ok(Transport::Tcp),
+            val => bail!("expected 'stdio' or 'tcp' (got {val:?})"),
+        }
+    }
+    fn to_value(&self) -> Value {
+        match self {
+            Transport::Stdio => "stdio".into(),
+            Transport::Tcp => "tcp".into(),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
+#[serde(untagged)]
+pub enum DebugArgumentValue {
+    String(String),
+    Array(Vec<String>),
+    Boolean(bool),
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "kebab-case")]
+pub struct AdvancedCompletion {
+    pub name: Option<String>,
+    pub completion: Option<String>,
+    pub default: Option<String>,
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "kebab-case", untagged)]
+pub enum DebugConfigCompletion {
+    Named(String),
+    Advanced(AdvancedCompletion),
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "kebab-case")]
+pub struct DebugTemplate {
+    pub name: String,
+    pub request: String,
+    pub completion: Vec<DebugConfigCompletion>,
+    pub args: Map<DebugArgumentValue>,
+}
+
+// TODO: integrate this better with the new config system (less nesting)
+// the best way to do that is probably a rewrite. I think these templates
+// are probably overkill here. This may be easier to solve by moving the logic
+// to scheme
+config_serde_adapter!(DebugTemplate);
+
+#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(default, rename_all = "kebab-case", deny_unknown_fields)]
+pub struct TerminalConfig {
+    pub command: String,
+    #[serde(default)]
+    #[serde(skip_serializing_if = "Vec::is_empty")]
+    pub args: Vec<String>,
+}
+
+#[cfg(windows)]
+pub fn get_terminal_provider() -> Option<TerminalConfig> {
+    use helix_config::env::binary_exists;
+
+    if binary_exists("wt") {
+        return Some(TerminalConfig {
+            command: "wt".into(),
+            args: vec![
+                "new-tab".into(),
+                "--title".into(),
+                "DEBUG".into(),
+                "cmd".into(),
+                "/C".into(),
+            ],
+        });
+    }
+
+    Some(TerminalConfig {
+        command: "conhost".into(),
+        args: vec!["cmd".into(), "/C".into()],
+    })
+}
+
+#[cfg(not(any(windows, target_os = "wasm32")))]
+fn get_terminal_provider() -> Option<TerminalConfig> {
+    use helix_config::env::{binary_exists, env_var_is_set};
+
+    if env_var_is_set("TMUX") && binary_exists("tmux") {
+        return Some(TerminalConfig {
+            command: "tmux".into(),
+            args: vec!["split-window".into()],
+        });
+    }
+
+    if env_var_is_set("WEZTERM_UNIX_SOCKET") && binary_exists("wezterm") {
+        return Some(TerminalConfig {
+            command: "wezterm".into(),
+            args: vec!["cli".into(), "split-pane".into()],
+        });
+    }
+
+    None
+}
--- a/helix-dap/src/lib.rs
+++ b/helix-dap/src/lib.rs
@@ -1,4 +1,5 @@
 mod client;
+mod config;
 mod transport;
 mod types;

--- a/helix-lsp/Cargo.toml
+++ b/helix-lsp/Cargo.toml
@@ -14,6 +14,7 @@ homepage.workspace = true

 [dependencies]
 helix-core = { path = "../helix-core" }
+helix-config = { path = "../helix-config" }
 helix-loader = { path = "../helix-loader" }
 helix-parsec = { path = "../helix-parsec" }

@@ -30,3 +31,5 @@ tokio = { version = "1.35", features = ["rt", "rt-multi-thread", "io-util", "io-
 tokio-stream = "0.1.14"
 which = "5.0.0"
 parking_lot = "0.12.1"
+ahash = "0.8.6"
+indexmap = { version = "2.1.0", features = ["serde"] }
--- a/helix-lsp/src/client.rs
+++ b/helix-lsp/src/client.rs
@@ -1,9 +1,12 @@
 use crate::{
+    config::LanguageServerConfig,
    find_lsp_workspace, jsonrpc,
    transport::{Payload, Transport},
    Call, Error, OffsetEncoding, Result,
 };

+use anyhow::Context;
+use helix_config::{self as config, OptionManager};
 use helix_core::{find_workspace, path, syntax::LanguageServerFeature, ChangeSet, Rope};
 use helix_loader::{self, VERSION_AND_GIT_HASH};
 use lsp::{
@@ -13,15 +16,14 @@ use lsp::{
 };
 use lsp_types as lsp;
 use parking_lot::Mutex;
-use serde::Deserialize;
 use serde_json::Value;
 use std::future::Future;
+use std::path::PathBuf;
 use std::process::Stdio;
 use std::sync::{
    atomic::{AtomicU64, Ordering},
    Arc,
 };
-use std::{collections::HashMap, path::PathBuf};
 use tokio::{
    io::{BufReader, BufWriter},
    process::{Child, Command},
@@ -50,13 +52,11 @@ pub struct Client {
    server_tx: UnboundedSender<Payload>,
    request_counter: AtomicU64,
    pub(crate) capabilities: OnceCell<lsp::ServerCapabilities>,
-    config: Option<Value>,
    root_path: std::path::PathBuf,
    root_uri: Option<lsp::Url>,
    workspace_folders: Mutex<Vec<lsp::WorkspaceFolder>>,
    initialize_notify: Arc<Notify>,
-    /// workspace folders added while the server is still initializing
-    req_timeout: u64,
+    config: Arc<OptionManager>,
 }

 impl Client {
@@ -170,23 +170,20 @@ impl Client {

    #[allow(clippy::type_complexity, clippy::too_many_arguments)]
    pub fn start(
-        cmd: &str,
-        args: &[String],
-        config: Option<Value>,
-        server_environment: HashMap<String, String>,
+        config: Arc<OptionManager>,
        root_markers: &[String],
        manual_roots: &[PathBuf],
        id: usize,
        name: String,
-        req_timeout: u64,
        doc_path: Option<&std::path::PathBuf>,
    ) -> Result<(Self, UnboundedReceiver<(usize, Call)>, Arc<Notify>)> {
        // Resolve path to the binary
-        let cmd = which::which(cmd).map_err(|err| anyhow::anyhow!(err))?;
+        let cmd = which::which(config.command().as_deref().context("no command defined")?)
+            .map_err(|err| anyhow::anyhow!(err))?;

        let process = Command::new(cmd)
-            .envs(server_environment)
-            .args(args)
+            .envs(config.enviorment().iter().map(|(k, v)| (&**k, &**v)))
+            .args(config.args().iter().map(|v| &**v))
            .stdin(Stdio::piped())
            .stdout(Stdio::piped())
            .stderr(Stdio::piped())
@@ -233,7 +230,6 @@ impl Client {
            request_counter: AtomicU64::new(0),
            capabilities: OnceCell::new(),
            config,
-            req_timeout,
            root_path,
            root_uri,
            workspace_folders: Mutex::new(workspace_folders),
@@ -374,8 +370,8 @@ impl Client {
            .unwrap_or_default()
    }

-    pub fn config(&self) -> Option<&Value> {
-        self.config.as_ref()
+    pub fn config(&self) -> config::Guard<Option<Box<Value>>> {
+        self.config.server_config()
    }

    pub async fn workspace_folders(
@@ -404,7 +400,7 @@ impl Client {
    where
        R::Params: serde::Serialize,
    {
-        self.call_with_timeout::<R>(params, self.req_timeout)
+        self.call_with_timeout::<R>(params, self.config.timeout())
    }

    fn call_with_timeout<R: lsp::request::Request>(
@@ -512,7 +508,7 @@ impl Client {
    // -------------------------------------------------------------------------------------------

    pub(crate) async fn initialize(&self, enable_snippets: bool) -> Result<lsp::InitializeResult> {
-        if let Some(config) = &self.config {
+        if let Some(config) = &*self.config() {
            log::info!("Using custom LSP config: {}", config);
        }

@@ -524,7 +520,7 @@ impl Client {
            // clients will prefer _uri if possible
            root_path: self.root_path.to_str().map(|path| path.to_owned()),
            root_uri: self.root_uri.clone(),
-            initialization_options: self.config.clone(),
+            initialization_options: self.config().as_deref().cloned(),
            capabilities: lsp::ClientCapabilities {
                workspace: Some(lsp::WorkspaceClientCapabilities {
                    configuration: Some(true),
@@ -1152,17 +1148,12 @@ impl Client {
        };

        // merge FormattingOptions with 'config.format'
-        let config_format = self
-            .config
-            .as_ref()
-            .and_then(|cfg| cfg.get("format"))
-            .and_then(|fmt| HashMap::<String, lsp::FormattingProperty>::deserialize(fmt).ok());
-
-        let options = if let Some(mut properties) = config_format {
+        let mut config_format = self.config.format();
+        let options = if !config_format.is_empty() {
            // passed in options take precedence over 'config.format'
-            properties.extend(options.properties);
+            config_format.extend(options.properties);
            lsp::FormattingOptions {
-                properties,
+                properties: config_format,
                ..options
            }
        } else {
--- a/helix-lsp/src/config.rs
+++ b/helix-lsp/src/config.rs
@@ -0,0 +1,67 @@
+use std::collections::HashMap;
+
+use anyhow::bail;
+use helix_config::{options, List, Map, String, Ty, Value};
+
+use crate::lsp;
+
+// TODO: differentiating between Some(null) and None is not really practical
+// since the distinction is lost on a roundtrip trough config::Value.
+// Porbably better to change our code to treat null the way we currently
+// treat None
+options! {
+    struct LanguageServerConfig {
+        /// The name or path of the language server binary to execute. Binaries must be in `$PATH`
+        command: Option<String> = None,
+        /// A list of arguments to pass to the language server binary
+        #[read = deref]
+        args: List<String> = List::default(),
+        /// Any environment variables that will be used when starting the language server
+        enviorment: Map<String> = Map::default(),
+        /// LSP initialization options
+        #[name = "config"]
+        server_config: Option<Box<serde_json::Value>> = None,
+        /// LSP initialization options
+        #[read = copy]
+        timeout: u64 = 20,
+        // TODO: merge
+        /// LSP formatting options
+        #[name = "config.format"]
+        #[read = fold(HashMap::new(), fold_format_config, FormatConfig)]
+        format: Map<FormattingProperty> = Map::default()
+    }
+}
+
+type FormatConfig = HashMap<std::string::String, lsp::FormattingProperty>;
+
+fn fold_format_config(config: &Map<FormattingProperty>, mut res: FormatConfig) -> FormatConfig {
+    for (k, v) in config.iter() {
+        res.entry(k.to_string()).or_insert_with(|| v.0.clone());
+    }
+    res
+}
+
+// damm orphan rules :/
+#[derive(Debug, PartialEq, Clone)]
+struct FormattingProperty(lsp::FormattingProperty);
+
+impl Ty for FormattingProperty {
+    fn from_value(val: Value) -> anyhow::Result<Self> {
+        match val {
+            Value::Int(_) => Ok(FormattingProperty(lsp::FormattingProperty::Number(
+                i32::from_value(val)?,
+            ))),
+            Value::Bool(val) => Ok(FormattingProperty(lsp::FormattingProperty::Bool(val))),
+            Value::String(val) => Ok(FormattingProperty(lsp::FormattingProperty::String(val))),
+            _ => bail!("expected a string, boolean or integer"),
+        }
+    }
+
+    fn to_value(&self) -> Value {
+        match self.0 {
+            lsp::FormattingProperty::Bool(val) => Value::Bool(val),
+            lsp::FormattingProperty::Number(val) => Value::Int(val as _),
+            lsp::FormattingProperty::String(ref val) => Value::String(val.clone()),
+        }
+    }
+}
--- a/helix-lsp/src/lib.rs
+++ b/helix-lsp/src/lib.rs
@@ -1,4 +1,5 @@
 mod client;
+mod config;
 pub mod file_event;
 pub mod jsonrpc;
 pub mod snippet;
@@ -11,6 +12,7 @@ pub use lsp::{Position, Url};
 pub use lsp_types as lsp;

 use futures_util::stream::select_all::SelectAll;
+use helix_config::OptionRegistry;
 use helix_core::{
    path,
    syntax::{LanguageConfiguration, LanguageServerConfiguration, LanguageServerFeatures},
@@ -26,6 +28,8 @@ use std::{
 use thiserror::Error;
 use tokio_stream::wrappers::UnboundedReceiverStream;

+use crate::config::init_config;
+
 pub type Result<T> = core::result::Result<T, Error>;
 pub type LanguageServerName = String;

@@ -636,17 +640,25 @@ pub struct Registry {
    counter: usize,
    pub incoming: SelectAll<UnboundedReceiverStream<(usize, Call)>>,
    pub file_event_handler: file_event::Handler,
+    pub config: OptionRegistry,
 }

 impl Registry {
    pub fn new(syn_loader: Arc<helix_core::syntax::Loader>) -> Self {
-        Self {
+        let mut res = Self {
            inner: HashMap::new(),
            syn_loader,
            counter: 0,
            incoming: SelectAll::new(),
            file_event_handler: file_event::Handler::new(),
-        }
+            config: OptionRegistry::new(),
+        };
+        res.reset_config();
+        res
+    }
+
+    pub fn reset_config(&mut self) {
+        init_config(&mut self.config);
    }

    pub fn get_by_id(&self, id: usize) -> Option<&Client> {
@@ -882,15 +894,11 @@ fn start_client(
    enable_snippets: bool,
 ) -> Result<NewClient> {
    let (client, incoming, initialize_notify) = Client::start(
-        &ls_config.command,
-        &ls_config.args,
-        ls_config.config.clone(),
-        ls_config.environment.clone(),
+        todo!(),
        &config.roots,
        config.workspace_lsp_roots.as_deref().unwrap_or(root_dirs),
        id,
        name,
-        ls_config.timeout,
        doc_path,
    )?;

--- a/helix-term/src/application.rs
+++ b/helix-term/src/application.rs
@@ -699,7 +699,7 @@ impl Application {
                        // Trigger a workspace/didChangeConfiguration notification after initialization.
                        // This might not be required by the spec but Neovim does this as well, so it's
                        // probably a good idea for compatibility.
-                        if let Some(config) = language_server.config() {
+                        if let Some(config) = language_server.config().as_deref() {
                            tokio::spawn(language_server.did_change_configuration(config.clone()));
                        }

@@ -1023,7 +1023,8 @@ impl Application {
                            .items
                            .iter()
                            .map(|item| {
-                                let mut config = language_server.config()?;
+                                let config = language_server.config();
+                                let mut config = config.as_deref()?;
                                if let Some(section) = item.section.as_ref() {
                                    // for some reason some lsps send an empty string (observed in 'vscode-eslint-language-server')
                                    if !section.is_empty() {
@@ -1032,7 +1033,7 @@ impl Application {
                                        }
                                    }
                                }
-                                Some(config)
+                                Some(config.to_owned())
                            })
                            .collect();
                        Ok(json!(result))
--- a/helix-view/Cargo.toml
+++ b/helix-view/Cargo.toml
@@ -16,6 +16,7 @@ term = ["crossterm"]

 [dependencies]
 helix-core = { path = "../helix-core" }
+helix-config = { path = "../helix-config" }
 helix-event = { path = "../helix-event" }
 helix-loader = { path = "../helix-loader" }
 helix-lsp = { path = "../helix-lsp" }
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -1518,13 +1518,6 @@ impl Document {
        current_revision
    }

-    /// Corresponding language scope name. Usually `source.<lang>`.
-    pub fn language_scope(&self) -> Option<&str> {
-        self.language
-            .as_ref()
-            .map(|language| language.scope.as_str())
-    }
-
    /// Language name for the document. Corresponds to the `name` key in
    /// `languages.toml` configuration.
    pub fn language_name(&self) -> Option<&str> {
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -41,833 +41,13 @@ use anyhow::{anyhow, bail, Error};

 pub use helix_core::diagnostic::Severity;
 use helix_core::{
-    auto_pairs::AutoPairs,
-    syntax::{self, AutoPairConfig, IndentationHeuristic, LanguageServerFeature, SoftWrap},
-    Change, LineEnding, Position, Selection, NATIVE_LINE_ENDING,
+    syntax::{self, LanguageServerFeature},
+    Change, Position, Selection,
 };
 use helix_dap as dap;
 use helix_lsp::lsp;

-use serde::{ser::SerializeMap, Deserialize, Deserializer, Serialize, Serializer};
-
-use arc_swap::access::{DynAccess, DynGuard};
-
-fn deserialize_duration_millis<'de, D>(deserializer: D) -> Result<Duration, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    let millis = u64::deserialize(deserializer)?;
-    Ok(Duration::from_millis(millis))
-}
-
-fn serialize_duration_millis<S>(duration: &Duration, serializer: S) -> Result<S::Ok, S::Error>
-where
-    S: Serializer,
-{
-    serializer.serialize_u64(
-        duration
-            .as_millis()
-            .try_into()
-            .map_err(|_| serde::ser::Error::custom("duration value overflowed u64"))?,
-    )
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct GutterConfig {
-    /// Gutter Layout
-    pub layout: Vec<GutterType>,
-    /// Options specific to the "line-numbers" gutter
-    pub line_numbers: GutterLineNumbersConfig,
-}
-
-impl Default for GutterConfig {
-    fn default() -> Self {
-        Self {
-            layout: vec![
-                GutterType::Diagnostics,
-                GutterType::Spacer,
-                GutterType::LineNumbers,
-                GutterType::Spacer,
-                GutterType::Diff,
-            ],
-            line_numbers: GutterLineNumbersConfig::default(),
-        }
-    }
-}
-
-impl From<Vec<GutterType>> for GutterConfig {
-    fn from(x: Vec<GutterType>) -> Self {
-        GutterConfig {
-            layout: x,
-            ..Default::default()
-        }
-    }
-}
-
-fn deserialize_gutter_seq_or_struct<'de, D>(deserializer: D) -> Result<GutterConfig, D::Error>
-where
-    D: Deserializer<'de>,
-{
-    struct GutterVisitor;
-
-    impl<'de> serde::de::Visitor<'de> for GutterVisitor {
-        type Value = GutterConfig;
-
-        fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
-            write!(
-                formatter,
-                "an array of gutter names or a detailed gutter configuration"
-            )
-        }
-
-        fn visit_seq<S>(self, mut seq: S) -> Result<Self::Value, S::Error>
-        where
-            S: serde::de::SeqAccess<'de>,
-        {
-            let mut gutters = Vec::new();
-            while let Some(gutter) = seq.next_element::<String>()? {
-                gutters.push(
-                    gutter
-                        .parse::<GutterType>()
-                        .map_err(serde::de::Error::custom)?,
-                )
-            }
-
-            Ok(gutters.into())
-        }
-
-        fn visit_map<M>(self, map: M) -> Result<Self::Value, M::Error>
-        where
-            M: serde::de::MapAccess<'de>,
-        {
-            let deserializer = serde::de::value::MapAccessDeserializer::new(map);
-            Deserialize::deserialize(deserializer)
-        }
-    }
-
-    deserializer.deserialize_any(GutterVisitor)
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct GutterLineNumbersConfig {
-    /// Minimum number of characters to use for line number gutter. Defaults to 3.
-    pub min_width: usize,
-}
-
-impl Default for GutterLineNumbersConfig {
-    fn default() -> Self {
-        Self { min_width: 3 }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct FilePickerConfig {
-    /// IgnoreOptions
-    /// Enables ignoring hidden files.
-    /// Whether to hide hidden files in file picker and global search results. Defaults to true.
-    pub hidden: bool,
-    /// Enables following symlinks.
-    /// Whether to follow symbolic links in file picker and file or directory completions. Defaults to true.
-    pub follow_symlinks: bool,
-    /// Hides symlinks that point into the current directory. Defaults to true.
-    pub deduplicate_links: bool,
-    /// Enables reading ignore files from parent directories. Defaults to true.
-    pub parents: bool,
-    /// Enables reading `.ignore` files.
-    /// Whether to hide files listed in .ignore in file picker and global search results. Defaults to true.
-    pub ignore: bool,
-    /// Enables reading `.gitignore` files.
-    /// Whether to hide files listed in .gitignore in file picker and global search results. Defaults to true.
-    pub git_ignore: bool,
-    /// Enables reading global .gitignore, whose path is specified in git's config: `core.excludefile` option.
-    /// Whether to hide files listed in global .gitignore in file picker and global search results. Defaults to true.
-    pub git_global: bool,
-    /// Enables reading `.git/info/exclude` files.
-    /// Whether to hide files listed in .git/info/exclude in file picker and global search results. Defaults to true.
-    pub git_exclude: bool,
-    /// WalkBuilder options
-    /// Maximum Depth to recurse directories in file picker and global search. Defaults to `None`.
-    pub max_depth: Option<usize>,
-}
-
-impl Default for FilePickerConfig {
-    fn default() -> Self {
-        Self {
-            hidden: true,
-            follow_symlinks: true,
-            deduplicate_links: true,
-            parents: true,
-            ignore: true,
-            git_ignore: true,
-            git_global: true,
-            git_exclude: true,
-            max_depth: None,
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct Config {
-    /// Padding to keep between the edge of the screen and the cursor when scrolling. Defaults to 5.
-    pub scrolloff: usize,
-    /// Number of lines to scroll at once. Defaults to 3
-    pub scroll_lines: isize,
-    /// Mouse support. Defaults to true.
-    pub mouse: bool,
-    /// Shell to use for shell commands. Defaults to ["cmd", "/C"] on Windows and ["sh", "-c"] otherwise.
-    pub shell: Vec<String>,
-    /// Line number mode.
-    pub line_number: LineNumber,
-    /// Highlight the lines cursors are currently on. Defaults to false.
-    pub cursorline: bool,
-    /// Highlight the columns cursors are currently on. Defaults to false.
-    pub cursorcolumn: bool,
-    #[serde(deserialize_with = "deserialize_gutter_seq_or_struct")]
-    pub gutters: GutterConfig,
-    /// Middle click paste support. Defaults to true.
-    pub middle_click_paste: bool,
-    /// Automatic insertion of pairs to parentheses, brackets,
-    /// etc. Optionally, this can be a list of 2-tuples to specify a
-    /// global list of characters to pair. Defaults to true.
-    pub auto_pairs: AutoPairConfig,
-    /// Automatic auto-completion, automatically pop up without user trigger. Defaults to true.
-    pub auto_completion: bool,
-    /// Automatic formatting on save. Defaults to true.
-    pub auto_format: bool,
-    /// Automatic save on focus lost. Defaults to false.
-    pub auto_save: bool,
-    /// Set a global text_width
-    pub text_width: usize,
-    /// Time in milliseconds since last keypress before idle timers trigger.
-    /// Used for autocompletion, set to 0 for instant. Defaults to 250ms.
-    #[serde(
-        serialize_with = "serialize_duration_millis",
-        deserialize_with = "deserialize_duration_millis"
-    )]
-    pub idle_timeout: Duration,
-    /// Whether to insert the completion suggestion on hover. Defaults to true.
-    pub preview_completion_insert: bool,
-    pub completion_trigger_len: u8,
-    /// Whether to instruct the LSP to replace the entire word when applying a completion
-    /// or to only insert new text
-    pub completion_replace: bool,
-    /// Whether to display infoboxes. Defaults to true.
-    pub auto_info: bool,
-    pub file_picker: FilePickerConfig,
-    /// Configuration of the statusline elements
-    pub statusline: StatusLineConfig,
-    /// Shape for cursor in each mode
-    pub cursor_shape: CursorShapeConfig,
-    /// Set to `true` to override automatic detection of terminal truecolor support in the event of a false negative. Defaults to `false`.
-    pub true_color: bool,
-    /// Set to `true` to override automatic detection of terminal undercurl support in the event of a false negative. Defaults to `false`.
-    pub undercurl: bool,
-    /// Search configuration.
-    #[serde(default)]
-    pub search: SearchConfig,
-    pub lsp: LspConfig,
-    pub terminal: Option<TerminalConfig>,
-    /// Column numbers at which to draw the rulers. Defaults to `[]`, meaning no rulers.
-    pub rulers: Vec<u16>,
-    #[serde(default)]
-    pub whitespace: WhitespaceConfig,
-    /// Persistently display open buffers along the top
-    pub bufferline: BufferLine,
-    /// Vertical indent width guides.
-    pub indent_guides: IndentGuidesConfig,
-    /// Whether to color modes with different colors. Defaults to `false`.
-    pub color_modes: bool,
-    pub soft_wrap: SoftWrap,
-    /// Workspace specific lsp ceiling dirs
-    pub workspace_lsp_roots: Vec<PathBuf>,
-    /// Which line ending to choose for new documents. Defaults to `native`. i.e. `crlf` on Windows, otherwise `lf`.
-    pub default_line_ending: LineEndingConfig,
-    /// Whether to automatically insert a trailing line-ending on write if missing. Defaults to `true`.
-    pub insert_final_newline: bool,
-    /// Enables smart tab
-    pub smart_tab: Option<SmartTabConfig>,
-    /// Draw border around popups.
-    pub popup_border: PopupBorderConfig,
-    /// Which indent heuristic to use when a new line is inserted
-    #[serde(default)]
-    pub indent_heuristic: IndentationHeuristic,
-}
-
-#[derive(Debug, Clone, PartialEq, Deserialize, Serialize, Eq, PartialOrd, Ord)]
-#[serde(rename_all = "kebab-case", default)]
-pub struct SmartTabConfig {
-    pub enable: bool,
-    pub supersede_menu: bool,
-}
-
-impl Default for SmartTabConfig {
-    fn default() -> Self {
-        SmartTabConfig {
-            enable: true,
-            supersede_menu: false,
-        }
-    }
-}
-
-#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(default, rename_all = "kebab-case", deny_unknown_fields)]
-pub struct TerminalConfig {
-    pub command: String,
-    #[serde(default)]
-    #[serde(skip_serializing_if = "Vec::is_empty")]
-    pub args: Vec<String>,
-}
-
-#[cfg(windows)]
-pub fn get_terminal_provider() -> Option<TerminalConfig> {
-    use crate::env::binary_exists;
-
-    if binary_exists("wt") {
-        return Some(TerminalConfig {
-            command: "wt".to_string(),
-            args: vec![
-                "new-tab".to_string(),
-                "--title".to_string(),
-                "DEBUG".to_string(),
-                "cmd".to_string(),
-                "/C".to_string(),
-            ],
-        });
-    }
-
-    Some(TerminalConfig {
-        command: "conhost".to_string(),
-        args: vec!["cmd".to_string(), "/C".to_string()],
-    })
-}
-
-#[cfg(not(any(windows, target_os = "wasm32")))]
-pub fn get_terminal_provider() -> Option<TerminalConfig> {
-    use crate::env::{binary_exists, env_var_is_set};
-
-    if env_var_is_set("TMUX") && binary_exists("tmux") {
-        return Some(TerminalConfig {
-            command: "tmux".to_string(),
-            args: vec!["split-window".to_string()],
-        });
-    }
-
-    if env_var_is_set("WEZTERM_UNIX_SOCKET") && binary_exists("wezterm") {
-        return Some(TerminalConfig {
-            command: "wezterm".to_string(),
-            args: vec!["cli".to_string(), "split-pane".to_string()],
-        });
-    }
-
-    None
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(default, rename_all = "kebab-case", deny_unknown_fields)]
-pub struct LspConfig {
-    /// Enables LSP
-    pub enable: bool,
-    /// Display LSP progress messages below statusline
-    pub display_messages: bool,
-    /// Enable automatic pop up of signature help (parameter hints)
-    pub auto_signature_help: bool,
-    /// Display docs under signature help popup
-    pub display_signature_help_docs: bool,
-    /// Display inlay hints
-    pub display_inlay_hints: bool,
-    /// Whether to enable snippet support
-    pub snippets: bool,
-    /// Whether to include declaration in the goto reference query
-    pub goto_reference_include_declaration: bool,
-}
-
-impl Default for LspConfig {
-    fn default() -> Self {
-        Self {
-            enable: true,
-            display_messages: false,
-            auto_signature_help: true,
-            display_signature_help_docs: true,
-            display_inlay_hints: false,
-            snippets: true,
-            goto_reference_include_declaration: true,
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct SearchConfig {
-    /// Smart case: Case insensitive searching unless pattern contains upper case characters. Defaults to true.
-    pub smart_case: bool,
-    /// Whether the search should wrap after depleting the matches. Default to true.
-    pub wrap_around: bool,
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct StatusLineConfig {
-    pub left: Vec<StatusLineElement>,
-    pub center: Vec<StatusLineElement>,
-    pub right: Vec<StatusLineElement>,
-    pub separator: String,
-    pub mode: ModeConfig,
-}
-
-impl Default for StatusLineConfig {
-    fn default() -> Self {
-        use StatusLineElement as E;
-
-        Self {
-            left: vec![
-                E::Mode,
-                E::Spinner,
-                E::FileName,
-                E::ReadOnlyIndicator,
-                E::FileModificationIndicator,
-            ],
-            center: vec![],
-            right: vec![
-                E::Diagnostics,
-                E::Selections,
-                E::Register,
-                E::Position,
-                E::FileEncoding,
-            ],
-            separator: String::from("│"),
-            mode: ModeConfig::default(),
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case", default, deny_unknown_fields)]
-pub struct ModeConfig {
-    pub normal: String,
-    pub insert: String,
-    pub select: String,
-}
-
-impl Default for ModeConfig {
-    fn default() -> Self {
-        Self {
-            normal: String::from("NOR"),
-            insert: String::from("INS"),
-            select: String::from("SEL"),
-        }
-    }
-}
-
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum StatusLineElement {
-    /// The editor mode (Normal, Insert, Visual/Selection)
-    Mode,
-
-    /// The LSP activity spinner
-    Spinner,
-
-    /// The file basename (the leaf of the open file's path)
-    FileBaseName,
-
-    /// The relative file path
-    FileName,
-
-    // The file modification indicator
-    FileModificationIndicator,
-
-    /// An indicator that shows `"[readonly]"` when a file cannot be written
-    ReadOnlyIndicator,
-
-    /// The file encoding
-    FileEncoding,
-
-    /// The file line endings (CRLF or LF)
-    FileLineEnding,
-
-    /// The file type (language ID or "text")
-    FileType,
-
-    /// A summary of the number of errors and warnings
-    Diagnostics,
-
-    /// A summary of the number of errors and warnings on file and workspace
-    WorkspaceDiagnostics,
-
-    /// The number of selections (cursors)
-    Selections,
-
-    /// The number of characters currently in primary selection
-    PrimarySelectionLength,
-
-    /// The cursor position
-    Position,
-
-    /// The separator string
-    Separator,
-
-    /// The cursor position as a percent of the total file
-    PositionPercentage,
-
-    /// The total line numbers of the current file
-    TotalLineNumbers,
-
-    /// A single space
-    Spacer,
-
-    /// Current version control information
-    VersionControl,
-
-    /// Indicator for selected register
-    Register,
-}
-
-// Cursor shape is read and used on every rendered frame and so needs
-// to be fast. Therefore we avoid a hashmap and use an enum indexed array.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct CursorShapeConfig([CursorKind; 3]);
-
-impl CursorShapeConfig {
-    pub fn from_mode(&self, mode: Mode) -> CursorKind {
-        self.get(mode as usize).copied().unwrap_or_default()
-    }
-}
-
-impl<'de> Deserialize<'de> for CursorShapeConfig {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: Deserializer<'de>,
-    {
-        let m = HashMap::<Mode, CursorKind>::deserialize(deserializer)?;
-        let into_cursor = |mode: Mode| m.get(&mode).copied().unwrap_or_default();
-        Ok(CursorShapeConfig([
-            into_cursor(Mode::Normal),
-            into_cursor(Mode::Select),
-            into_cursor(Mode::Insert),
-        ]))
-    }
-}
-
-impl Serialize for CursorShapeConfig {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        let mut map = serializer.serialize_map(Some(self.len()))?;
-        let modes = [Mode::Normal, Mode::Select, Mode::Insert];
-        for mode in modes {
-            map.serialize_entry(&mode, &self.from_mode(mode))?;
-        }
-        map.end()
-    }
-}
-
-impl std::ops::Deref for CursorShapeConfig {
-    type Target = [CursorKind; 3];
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl Default for CursorShapeConfig {
-    fn default() -> Self {
-        Self([CursorKind::Block; 3])
-    }
-}
-
-/// bufferline render modes
-#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum BufferLine {
-    /// Don't render bufferline
-    #[default]
-    Never,
-    /// Always render
-    Always,
-    /// Only if multiple buffers are open
-    Multiple,
-}
-
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum LineNumber {
-    /// Show absolute line number
-    Absolute,
-
-    /// If focused and in normal/select mode, show relative line number to the primary cursor.
-    /// If unfocused or in insert mode, show absolute line number.
-    Relative,
-}
-
-impl std::str::FromStr for LineNumber {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s.to_lowercase().as_str() {
-            "absolute" | "abs" => Ok(Self::Absolute),
-            "relative" | "rel" => Ok(Self::Relative),
-            _ => anyhow::bail!("Line number can only be `absolute` or `relative`."),
-        }
-    }
-}
-
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum GutterType {
-    /// Show diagnostics and other features like breakpoints
-    Diagnostics,
-    /// Show line numbers
-    LineNumbers,
-    /// Show one blank space
-    Spacer,
-    /// Highlight local changes
-    Diff,
-}
-
-impl std::str::FromStr for GutterType {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s.to_lowercase().as_str() {
-            "diagnostics" => Ok(Self::Diagnostics),
-            "spacer" => Ok(Self::Spacer),
-            "line-numbers" => Ok(Self::LineNumbers),
-            "diff" => Ok(Self::Diff),
-            _ => anyhow::bail!(
-                "Gutter type can only be `diagnostics`, `spacer`, `line-numbers` or `diff`."
-            ),
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(default)]
-pub struct WhitespaceConfig {
-    pub render: WhitespaceRender,
-    pub characters: WhitespaceCharacters,
-}
-
-impl Default for WhitespaceConfig {
-    fn default() -> Self {
-        Self {
-            render: WhitespaceRender::Basic(WhitespaceRenderValue::None),
-            characters: WhitespaceCharacters::default(),
-        }
-    }
-}
-
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(untagged, rename_all = "kebab-case")]
-pub enum WhitespaceRender {
-    Basic(WhitespaceRenderValue),
-    Specific {
-        default: Option<WhitespaceRenderValue>,
-        space: Option<WhitespaceRenderValue>,
-        nbsp: Option<WhitespaceRenderValue>,
-        tab: Option<WhitespaceRenderValue>,
-        newline: Option<WhitespaceRenderValue>,
-    },
-}
-
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum WhitespaceRenderValue {
-    None,
-    // TODO
-    // Selection,
-    All,
-}
-
-impl WhitespaceRender {
-    pub fn space(&self) -> WhitespaceRenderValue {
-        match *self {
-            Self::Basic(val) => val,
-            Self::Specific { default, space, .. } => {
-                space.or(default).unwrap_or(WhitespaceRenderValue::None)
-            }
-        }
-    }
-    pub fn nbsp(&self) -> WhitespaceRenderValue {
-        match *self {
-            Self::Basic(val) => val,
-            Self::Specific { default, nbsp, .. } => {
-                nbsp.or(default).unwrap_or(WhitespaceRenderValue::None)
-            }
-        }
-    }
-    pub fn tab(&self) -> WhitespaceRenderValue {
-        match *self {
-            Self::Basic(val) => val,
-            Self::Specific { default, tab, .. } => {
-                tab.or(default).unwrap_or(WhitespaceRenderValue::None)
-            }
-        }
-    }
-    pub fn newline(&self) -> WhitespaceRenderValue {
-        match *self {
-            Self::Basic(val) => val,
-            Self::Specific {
-                default, newline, ..
-            } => newline.or(default).unwrap_or(WhitespaceRenderValue::None),
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(default)]
-pub struct WhitespaceCharacters {
-    pub space: char,
-    pub nbsp: char,
-    pub tab: char,
-    pub tabpad: char,
-    pub newline: char,
-}
-
-impl Default for WhitespaceCharacters {
-    fn default() -> Self {
-        Self {
-            space: '·',   // U+00B7
-            nbsp: '⍽',    // U+237D
-            tab: '→',     // U+2192
-            newline: '⏎', // U+23CE
-            tabpad: ' ',
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(default, rename_all = "kebab-case")]
-pub struct IndentGuidesConfig {
-    pub render: bool,
-    pub character: char,
-    pub skip_levels: u8,
-}
-
-impl Default for IndentGuidesConfig {
-    fn default() -> Self {
-        Self {
-            skip_levels: 0,
-            render: false,
-            character: '│',
-        }
-    }
-}
-
-/// Line ending configuration.
-#[derive(Default, Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "lowercase")]
-pub enum LineEndingConfig {
-    /// The platform's native line ending.
-    ///
-    /// `crlf` on Windows, otherwise `lf`.
-    #[default]
-    Native,
-    /// Line feed.
-    LF,
-    /// Carriage return followed by line feed.
-    Crlf,
-    /// Form feed.
-    #[cfg(feature = "unicode-lines")]
-    FF,
-    /// Carriage return.
-    #[cfg(feature = "unicode-lines")]
-    CR,
-    /// Next line.
-    #[cfg(feature = "unicode-lines")]
-    Nel,
-}
-
-impl From<LineEndingConfig> for LineEnding {
-    fn from(line_ending: LineEndingConfig) -> Self {
-        match line_ending {
-            LineEndingConfig::Native => NATIVE_LINE_ENDING,
-            LineEndingConfig::LF => LineEnding::LF,
-            LineEndingConfig::Crlf => LineEnding::Crlf,
-            #[cfg(feature = "unicode-lines")]
-            LineEndingConfig::FF => LineEnding::FF,
-            #[cfg(feature = "unicode-lines")]
-            LineEndingConfig::CR => LineEnding::CR,
-            #[cfg(feature = "unicode-lines")]
-            LineEndingConfig::Nel => LineEnding::Nel,
-        }
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
-pub enum PopupBorderConfig {
-    None,
-    All,
-    Popup,
-    Menu,
-}
-
-impl Default for Config {
-    fn default() -> Self {
-        Self {
-            scrolloff: 5,
-            scroll_lines: 3,
-            mouse: true,
-            shell: if cfg!(windows) {
-                vec!["cmd".to_owned(), "/C".to_owned()]
-            } else {
-                vec!["sh".to_owned(), "-c".to_owned()]
-            },
-            line_number: LineNumber::Absolute,
-            cursorline: false,
-            cursorcolumn: false,
-            gutters: GutterConfig::default(),
-            middle_click_paste: true,
-            auto_pairs: AutoPairConfig::default(),
-            auto_completion: true,
-            auto_format: true,
-            auto_save: false,
-            idle_timeout: Duration::from_millis(250),
-            preview_completion_insert: true,
-            completion_trigger_len: 2,
-            auto_info: true,
-            file_picker: FilePickerConfig::default(),
-            statusline: StatusLineConfig::default(),
-            cursor_shape: CursorShapeConfig::default(),
-            true_color: false,
-            undercurl: false,
-            search: SearchConfig::default(),
-            lsp: LspConfig::default(),
-            terminal: get_terminal_provider(),
-            rulers: Vec::new(),
-            whitespace: WhitespaceConfig::default(),
-            bufferline: BufferLine::default(),
-            indent_guides: IndentGuidesConfig::default(),
-            color_modes: false,
-            soft_wrap: SoftWrap {
-                enable: Some(false),
-                ..SoftWrap::default()
-            },
-            text_width: 80,
-            completion_replace: false,
-            workspace_lsp_roots: Vec::new(),
-            default_line_ending: LineEndingConfig::default(),
-            insert_final_newline: true,
-            smart_tab: Some(SmartTabConfig::default()),
-            popup_border: PopupBorderConfig::None,
-            indent_heuristic: IndentationHeuristic::default(),
-        }
-    }
-}
-
-impl Default for SearchConfig {
-    fn default() -> Self {
-        Self {
-            wrap_around: true,
-            smart_case: true,
-        }
-    }
-}
+use arc_swap::access::DynGuard;

 #[derive(Debug, Clone, Default)]
 pub struct Breakpoint {
@@ -1236,8 +416,7 @@ impl Editor {
                    Ok(client) => Some((lang, client)),
                    Err(err) => {
                        log::error!(
-                            "Failed to initialize the language servers for `{}` - `{}` {{ {} }}",
-                            language.scope(),
+                            "Failed to initialize the language servers for  `{}` {{ {} }}",
                            lang,
                            err
                        );
--- a/helix-view/src/gutter.rs
+++ b/helix-view/src/gutter.rs
@@ -1,13 +1,96 @@
 use std::fmt::Write;

+use helix_config::{config_serde_adapter, options, List};
 use helix_core::syntax::LanguageServerFeature;
+use serde::{Deserialize, Serialize};

 use crate::{
-    editor::GutterType,
    graphics::{Style, UnderlineStyle},
    Document, Editor, Theme, View,
 };

+#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum LineNumber {
+    /// Show absolute line number
+    #[serde(alias = "abs")]
+    Absolute,
+    /// If focused and in normal/select mode, show relative line number to the primary cursor.
+    /// If unfocused or in insert mode, show absolute line number.
+    #[serde(alias = "rel")]
+    Relative,
+}
+
+config_serde_adapter!(LineNumber);
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum GutterType {
+    /// Show diagnostics and other features like breakpoints
+    Diagnostics,
+    /// Show line numbers
+    LineNumbers,
+    /// Show one blank space
+    Spacer,
+    /// Highlight local changes
+    Diff,
+}
+
+impl std::str::FromStr for GutterType {
+    type Err = anyhow::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s.to_lowercase().as_str() {
+            "diagnostics" => Ok(Self::Diagnostics),
+            "spacer" => Ok(Self::Spacer),
+            "line-numbers" => Ok(Self::LineNumbers),
+            "diff" => Ok(Self::Diff),
+            _ => anyhow::bail!(
+                "expected one of `diagnostics`, `spacer`, `line-numbers` or `diff` (found {s:?})"
+            ),
+        }
+    }
+}
+
+impl helix_config::Ty for GutterType {
+    fn from_value(val: helix_config::Value) -> anyhow::Result<Self> {
+        let val: String = val.typed()?;
+        val.parse()
+    }
+
+    fn to_value(&self) -> helix_config::Value {
+        match self {
+            GutterType::Diagnostics => "diagnostics".into(),
+            GutterType::LineNumbers => "lineNumbers".into(),
+            GutterType::Spacer => "spacer".into(),
+            GutterType::Diff => "diff".into(),
+        }
+    }
+}
+
+options! {
+    struct GutterConfig {
+        /// A list of gutters to display
+        #[name = "gutters.layout"]
+        layout: List<GutterType> = &[
+            GutterType::Diagnostics,
+            GutterType::Spacer,
+            GutterType::LineNumbers,
+            GutterType::Spacer,
+            GutterType::Diff,
+        ],
+        /// The minimum number of characters the line number gutter should take up.
+        #[name = "gutters.line-numbers.min-width"]
+        line_number_min_width: usize = 3,
+        /// Line number display: `absolute` simply shows each line's number,
+        /// while `relative` shows the distance from the current line. When
+        /// unfocused or in insert mode, `relative` will still show absolute
+        /// line numbers
+        #[name = "line-number"]
+        line_number_mode: LineNumber = LineNumber::Absolute,
+    }
+}
+
 fn count_digits(n: usize) -> usize {
    (usize::checked_ilog10(n).unwrap_or(0) + 1) as usize
 }
Author	SHA1	Message	Date
Pascal Kuthe	87266b0a07	replace serde structs with helix-config toml adapter	2024-01-16 14:44:53 +01:00
Pascal Kuthe	dcbe8496b9	remove unused languag.scope option	2024-01-16 14:44:52 +01:00
Pascal Kuthe	fb13130701	migrate language server config to new config system	2024-01-16 14:44:52 +01:00
Pascal Kuthe	7ba8674466	define new config options	2024-01-16 14:44:52 +01:00
Pascal Kuthe	5e74d3c821	config system prototype	2024-01-16 14:44:51 +01:00