build: Add dist check script that checks if there are unsupported devices

meson.build

@@ -334,6 +334,8 @@ subdir('tests')
 
 subdir('examples')
 
+meson.add_dist_script(sync_unsupported_files, '--check', udev_hwdb_list_file)
+
 pkgconfig = import('pkgconfig')
 pkgconfig.generate(
     name: versioned_libname,

scripts/sync-unsupported-devices.py

@@ -4,6 +4,7 @@
 # fprint-list-udev-hwdb.c from the libfprint wiki page.
 
 import argparse
+import os
 import re
 import sys
 from urllib.request import urlopen
@@ -40,6 +41,11 @@ def main():
     parser = argparse.ArgumentParser(description=__doc__)
     parser.add_argument("source_file", help="Path to hwdb file")
     parser.add_argument("--url", default=DEFAULT_URL, help="Wiki page URL")
+    parser.add_argument(
+        "--check",
+        action="store_true",
+        help="Do not modify files, fail if an update is needed",
+    )
     args = parser.parse_args()
 
     entries = parse_entries(fetch(args.url))
@@ -61,6 +67,10 @@ def main():
         print("allowlist_id_table is already up to date")
         return
 
+    if args.check:
+        print("allowlist_id_table is out of date", file=sys.stderr)
+        sys.exit(1)
+
     with open(args.source_file, "w", encoding="utf-8") as f:
         f.write(new_content)