Update examples collection

emsdk-cache/emsdk-main/scripts/get_emscripten_revision_info.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import subprocess
+import sys
+
+EMSCRIPTEN_RELEASES_GIT = 'https://chromium.googlesource.com/emscripten-releases'
+TAGFILE = 'emscripten-releases-tags.json'
+
+
+def get_latest_hash(tagfile):
+    with open(tagfile) as f:
+        versions = json.load(f)
+        latest = versions['aliases']['latest']
+        return versions['releases'][latest]
+
+
+def get_latest_emscripten(tagfile):
+    latest = get_latest_hash(tagfile)
+    if not os.path.isdir('emscripten-releases'):
+        subprocess.run(['git', 'clone', EMSCRIPTEN_RELEASES_GIT, '--depth',
+                        '100'], check=True)
+    # This will fail if the 'latest' revision is not within the most recent
+    # 100 commits; but that shouldn't happen because this script is intended
+    # to be run right after a release is added.
+    info = subprocess.run(['emscripten-releases/src/release-info.py',
+                           'emscripten-releases', latest],
+                          stdout=subprocess.PIPE, check=True, text=True).stdout
+    for line in info.split('\n'):
+        tokens = line.split()
+        if len(tokens) and tokens[0] == 'emscripten':
+            return tokens[2]
+
+
+if __name__ == '__main__':
+    emscripten_hash = get_latest_emscripten(TAGFILE)
+    print('Emscripten revision ' + emscripten_hash)
+    if 'GITHUB_ENV' in os.environ:
+        with open(os.environ['GITHUB_ENV'], 'a') as f:
+            f.write(f'EMSCRIPTEN_HASH={emscripten_hash}')
+        sys.exit(0)
+    print('Not a GitHub Action')
+    sys.exit(1)