javac.py 文件源码

def _ExtractClassFiles(jar_path, dest_dir, java_files):
  """Extracts all .class files not corresponding to |java_files|."""
  # Two challenges exist here:
  # 1. |java_files| have prefixes that are not represented in the the jar paths.
  # 2. A single .java file results in multiple .class files when it contains
  #    nested classes.
  # Here's an example:
  #   source path: ../../base/android/java/src/org/chromium/Foo.java
  #   jar paths: org/chromium/Foo.class, org/chromium/Foo$Inner.class
  # To extract only .class files not related to the given .java files, we strip
  # off ".class" and "$*.class" and use a substring match against java_files.
  def extract_predicate(path):
    if not path.endswith('.class'):
      return False
    path_without_suffix = re.sub(r'(?:\$|\.)[^/]*class$', '', path)
    partial_java_path = path_without_suffix + '.java'
    return not any(p.endswith(partial_java_path) for p in java_files)

  build_utils.ExtractAll(jar_path, path=dest_dir, predicate=extract_predicate)
  for path in build_utils.FindInDirectory(dest_dir, '*.class'):
    shutil.copystat(jar_path, path)