Generate compiled_resources2.gyp for Polymer based on <link rel=import>s

tools/polymer/generate_compiled_resources_gyp.py

+#!/usr/bin/env python
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from bs4 import BeautifulSoup
+from datetime import date
+import os.path as path
+import sys
+
+
+_SRC = path.join(path.dirname(path.abspath(__file__)), "..", "..")
+_COMPILE_JS = path.join(
+    _SRC, "third_party", "closure_compiler", "compile_js2.gypi")
+_POLYMERS = ["polymer%s.html" % p for p in "", "-mini", "-micro"]
+_COMPILED_RESOURCES_TEMPLATE = """
+# Copyright %d The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# NOTE: Created with %s, please do not edit.
+{
+  'targets': [
+    %s
+  ],
+}
+""".strip()
+
+
+def main(created_by, html_files):
+  targets = ""
+
+  for html_file in html_files:
+    html_base = path.basename(html_file)
+    if html_base in _POLYMERS:
+      continue
+
+    parsed = BeautifulSoup(open(html_file), "html.parser")
+    imports = set(i.get("href") for i in parsed.find_all("link", rel="import"))
+
+    html_dir = path.dirname(html_file)
+    dependencies = []
+
+    for html_import in sorted(imports):
+      import_dir, import_base = path.split(html_import.encode("ascii"))
+      if import_base in _POLYMERS:
+        continue
+
+      target = import_base[:-5] + "-extracted"
+      if not path.isfile(path.join(html_dir, import_dir, target + ".js")):
+        continue
+
+      if import_dir:
+        target = "compiled_resources2.gyp:" + target
+
+      dependencies.append(path.join(import_dir, target))
+
+    path_to_compile_js = path.relpath(_COMPILE_JS, html_dir)
+
+    targets += "\n    {"
+    targets += "\n      'target_name': '%s-extracted'," % html_base[:-5]
+    if dependencies:
+      targets += "\n      'dependencies': ["
+      targets += "\n        '%s'," % "',\n        '".join(dependencies)
+      targets += "\n      ],"
+    targets += "\n      'includes': ['%s']," % path_to_compile_js
+    targets += "\n    },"
+
+  targets = targets.strip()
+
+  if targets:
+    current_year = date.today().year
+    print _COMPILED_RESOURCES_TEMPLATE % (current_year, created_by, targets)
+
+
+if __name__ == "__main__":
+  main(path.basename(sys.argv[0]), sys.argv[1:])