Add theme studio default face drift summary

1 files changed, 30 insertions, 0 deletions

diff --git a/scripts/theme-studio/default-face-summary.py b/scripts/theme-studio/default-face-summary.py
new file mode 100644
index 000000000..4a163eb4f
--- /dev/null
+++ b/scripts/theme-studio/default-face-summary.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+"""Print a concise summary of theme-studio's captured Emacs default faces."""
+
+from __future__ import annotations
+
+import json
+import pathlib
+import sys
+
+from default_faces import DefaultFaces, changed_summary
+
+
+HERE = pathlib.Path(__file__).resolve().parent
+
+
+def main() -> None:
+    paths = [pathlib.Path(p) for p in sys.argv[1:]]
+    if not paths:
+        paths = [HERE / "emacs-default-faces.json"]
+    summaries = [DefaultFaces.from_path(path).summary() for path in paths]
+    if len(summaries) == 1:
+        print(json.dumps(summaries[0], indent=2, sort_keys=True))
+    elif len(summaries) == 2:
+        print(json.dumps(changed_summary(summaries[0], summaries[1]), indent=2, sort_keys=True))
+    else:
+        raise SystemExit("usage: default-face-summary.py [snapshot.json [snapshot-after.json]]")
+
+
+if __name__ == "__main__":
+    main()