add script to search for 'Axis Mappings' custom parameter

meant to investigate googlefonts/glyphsLib#745

find_axis_mappings.py

@@ -0,0 +1,72 @@
+"""Search all GF sources for 'Axis Mappings' custom parameter."""
+
+import subprocess
+from pprint import pprint
+from pathlib import Path
+import openstep_plist
+
+CURRENT_DIR = Path(__file__).parent
+SOURCES = CURRENT_DIR / "sources"
+
+
+def group_sources_by_repo_url():
+    result = {}
+    for path in SOURCES.iterdir():
+        if not path.is_dir() or path.name == "failures":
+            continue
+        assert path.name in ("apache", "ofl", "ufl"), (
+            "Unexpected license subdir: %s" % path
+        )
+        for source in path.iterdir():
+            if not (source / ".git").is_dir():
+                continue
+            git_result = subprocess.run(
+                ["git", "remote", "get-url", "origin"],
+                capture_output=True,
+                check=True,
+                cwd=source,
+            )
+            repo_url = git_result.stdout.decode("utf-8")
+            result.setdefault(repo_url, []).append(source)
+    return result
+
+
+def main():
+    sources_by_repo_url = group_sources_by_repo_url()
+    print("Total unique repo urls:", len(sources_by_repo_url))
+    glyphs_file_count = 0
+    all_axis_mappings = {}
+    print("Searching for 'Axis Mappings' custom parameter... may take a while")
+    for url, sources in sources_by_repo_url.items():
+        source = sources[0]
+        assert source.is_dir()
+        for glyphs_file in source.rglob("*.glyphs"):
+            glyphs_file_count += 1
+            rel_path = glyphs_file.relative_to(CURRENT_DIR)
+            # print("Parsing", rel_path)
+            try:
+                font = openstep_plist.load(glyphs_file.open("r", encoding="utf-8"))
+            except Exception as e:
+                print("Error parsing", rel_path, str(e)[:100])
+                continue
+            # get 'Axis Mappings' custom parameter
+            custom_parameters = font.get("customParameters", [])
+            raw_axis_mappings = next(
+                (p["value"] for p in custom_parameters if p["name"] == "Axis Mappings"),
+                None,
+            )
+            if raw_axis_mappings:
+                axis_mappings = {
+                    tag: {float(k): float(v) for k, v in raw_axis_mappings[tag].items()}
+                    for tag in raw_axis_mappings
+                }
+                print(rel_path)
+                pprint(axis_mappings)
+                print()
+                all_axis_mappings[rel_path] = axis_mappings
+    print("Number of .glyphs files:", glyphs_file_count)
+    print("Number of axis mappings:", len(all_axis_mappings))
+
+
+if __name__ == "__main__":
+    main()