closure: add script to track compilation progress.

R=tbreisacher@chromium.org
BUG=393873

Review URL: https://codereview.chromium.org/490773005

Cr-Commit-Position: refs/heads/master@{#291937}

third_party/closure_compiler/tools/compile_coverage.py

+#!/usr/bin/python
+# Copyright 2014 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 ast import literal_eval
+import os
+
+
+# High priority code to compile.
+_NEED_TO_COMPILE = [
+  'chrome/browser/resources',
+  'chrome/browser/ui/webui',
+  'ui/webui/resources/js',
+]
+
+
+# Code that we'd eventually like to compile.
+_WANT_TO_COMPILE = [
+  'chrome/renderer/resources',
+  'chrome/test/data',
+  'content/renderer/resources',
+  'content/test/data',
+  'extensions/renderer',
+  'extensions/test/data',
+  'remoting',
+  'ui/file_manager',
+  'ui/keyboard',
+]
+
+
+def main():
+  here = os.path.dirname(__file__)
+  src_root = os.path.join(here, '..', '..', '..')
+
+  line_cache = {}
+
+  def js_files_in_dir(js_dir):
+    found_files = set()
+    for root, dirs, files in os.walk(js_dir):
+      js = filter(lambda f: f.endswith('.js'), files)
+      found_files.update([os.path.abspath(os.path.join(root, f)) for f in js])
+    return found_files
+
+  def num_lines(f):
+    if f not in line_cache:
+      line_cache[f] = len(open(f, 'r').read().splitlines())
+    return line_cache[f]
+
+  # All the files that are already compiled.
+  compiled = set()
+
+  closure_dir = os.path.join(here, '..')
+  root_gyp = os.path.join(closure_dir, 'compiled_resources.gyp')
+  root_contents = open(root_gyp, 'r').read()
+  gyp_files = literal_eval(root_contents)['targets'][0]['dependencies']
+
+  for g in gyp_files:
+    src_to_closure = os.path.relpath(src_root, closure_dir)
+    rel_file = os.path.relpath(g.replace(':*', ''), src_to_closure)
+    abs_file = os.path.abspath(rel_file)
+    targets = literal_eval(open(abs_file, 'r').read())['targets']
+
+    for target in targets:
+      abs_dir = os.path.dirname(abs_file)
+      target_file = os.path.join(abs_dir, target['target_name'] + '.js')
+      compiled.add(target_file)
+
+      if 'variables' in target and 'depends' in target['variables']:
+        depends = target['variables']['depends']
+        rel_depends = [os.path.join(abs_dir, d) for d in depends]
+        compiled.update([os.path.abspath(d) for d in rel_depends])
+
+  compiled_lines = sum(map(num_lines, compiled))
+  print 'compiled: %d files, %d lines' % (len(compiled), compiled_lines)
+
+  # Find and calculate the line count of all .js files in the wanted or needed
+  # resource directories.
+  files = set()
+
+  for n in _NEED_TO_COMPILE:
+    files.update(js_files_in_dir(os.path.join(src_root, n)))
+
+  need_lines = sum(map(num_lines, files))
+  print 'need: %d files, %d lines' % (len(files), need_lines)
+
+  need_done = float(compiled_lines) / need_lines * 100
+  print '%.2f%% done with the code we need to compile' % need_done
+
+  for w in _WANT_TO_COMPILE:
+    files.update(js_files_in_dir(os.path.join(src_root, w)))
+
+  want_lines = sum(map(num_lines, files))
+  print 'want: %d files, %d lines' % (len(files), want_lines)
+
+  want_done = float(compiled_lines) / want_lines * 100
+  print '%.2f%% done with the code we want to compile' % want_done
+
+
+if __name__ == '__main__':
+  main()