scripts: add data analyzer for old nightly usages

.gitignore

@@ -2,5 +2,6 @@ target
 result
 result-*
 *.tmp
+__pycache__
 
 examples/cross-aarch64/flake.lock

scripts/cargo_stat_analysis.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+import json
+import urllib3
+from typing import Any
+
+# Ref: https://rust-lang.zulipchat.com/#narrow/stream/318791-t-crates-io/topic/cargo.20version.20usage/near/401415815
+URL = 'https://p.datadoghq.com/dashboard/shared_widget_update/3a172e20-e9e1-11ed-80e3-da7ad0900002-973f4c1011257befa8598303217bfe3a/355142551708710?preferred_time_frame=1mo'
+THRESHOLD = (1, 68, 0) # -> 0.0014751846373960305
+
+def main():
+    req = urllib3.request('GET', URL)
+    raw_json = json.loads(req.data)
+    raw: Any = raw_json['responses']['355142551708710'][0]['data'][0]['attributes']
+    data: list[tuple[str, int]] = list(
+        filter(
+            lambda el: el[1] != 0,
+            zip(
+                (g['group_tags'][0].removeprefix('cargo.version:') for g in raw['series']),
+                (sum(x for x in xs if x is not None) for xs in raw['values'])
+            ),
+        ),
+    )
+    data.sort(key = lambda el: el[1], reverse = True)
+    total = sum(cnt for _, cnt in data)
+
+    old_nightly = 0
+    for ver, cnt in data:
+        if ver.endswith('-nightly') or ver.endswith('-beta'):
+            ver_num = ver.split('-')[0]
+            vers_tup = tuple(map(int, ver_num.split('.')))
+            if vers_tup <= THRESHOLD:
+                old_nightly += cnt
+                print(ver, cnt / total)
+
+    print(f'total: {total}')
+    print(f'nightly <= {THRESHOLD}: {old_nightly / total}')
+
+if __name__ == '__main__':
+    main()