Rationalize Dart mojo and sky package structure

mojo/public/tools/dart_package.py

Index: mojo/public/tools/dart_package.py
diff --git a/mojo/public/tools/dart_package.py b/mojo/public/tools/dart_package.py
new file mode 100755
index 0000000000000000000000000000000000000000..083a6d51e0b4bbb86f12785ca7a2f802e8d42ae9
--- /dev/null
+++ b/mojo/public/tools/dart_package.py
@@ -0,0 +1,135 @@
+#!/usr/bin/env 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.
+
+"""Archives a set of dart packages"""
+
+import ast
+import optparse
+import os
+import sys
+import zipfile
+
+def IsPackagesPath(path):
+  return path.startswith('packages/')
+
+def IsMojomPath(path):
+  return path.startswith('mojom/lib/')
+
+def IsMojomDartFile(path):
+  return path.endswith('.mojom.dart')
+
+# Strips off mojom/lib/ returning module/interface.mojom.dart
+def MojomDartRelativePath(path):
+  assert IsMojomPath(path)
+  assert IsMojomDartFile(path)
+  return os.path.relpath(path, 'mojom/lib/')
+
+# Line is a line from pubspec.yaml
+def PackageName(line):
+  assert line.startswith("name:")
+  return line.split(":")[1].strip()
+
+# pubspec_contents is the contents of a pubspec.yaml file, returns the package
+# name.
+def FindPackageName(pubspec_contents):
+  for line in pubspec_contents.splitlines():
+    if line.startswith("name:"):
+      return PackageName(line)
+
+# Returns true if path is in lib/.
+def IsPathInLib(path):
+  return path.startswith("lib/")
+
+# Strips off lib/
+def PackageRelativePath(path):
+  return os.path.relpath(path, "lib/")
+
+def DoZip(inputs, zip_inputs, output, base_dir):
+  files = []
+  with zipfile.ZipFile(output, 'w', zipfile.ZIP_DEFLATED) as outfile:
+    # Loose file inputs (package source files)
+    for f in inputs:
+      file_name = os.path.relpath(f, base_dir)
+      # We should never see a packages/ path here.
+      assert not IsPackagesPath(file_name)
+      # We should never see a .mojom.dart path here.
+      files.append(file_name)
+      outfile.write(f, file_name)
+    # zip file inputs (other packages)
+    for zf_name in zip_inputs:
+      with zipfile.ZipFile(zf_name, 'r') as zf:
+        # Attempt to sniff package_name. If this fails, we are processing a zip
+        # file with mojom.dart bindings or a packages/ dump.
+        package_name = None
+        try:
+          with zf.open("pubspec.yaml") as pubspec_file:
+            package_name = FindPackageName(pubspec_file.read())
+        except KeyError:
+          pass
+
+        # Iterate over all files in zip file.
+        for f in zf.namelist():
+
+          # Copy any direct mojom dependencies into mojom/
+          if IsMojomPath(f):
+            mojom_dep_copy = os.path.join("lib/mojom/",
+                                          MojomDartRelativePath(f))
+            if mojom_dep_copy not in files:
+              files.append(mojom_dep_copy)
+              with zf.open(f) as zff:
+                outfile.writestr(mojom_dep_copy, zff.read())
+
+          # Rewrite output file name, if it isn't a packages/ path.
+          output_name = None
+          if not IsPackagesPath(f):
+            if IsMojomDartFile(f) and IsMojomPath(f):
+              # Place mojom/lib/*.mojom.dart files into packages/mojom/
+              output_name = os.path.join("packages/mojom/",
+                                         MojomDartRelativePath(f))
+            else:
+              # We are processing a package, it must have a package name.
+              assert not (package_name is None)
+              package_path = os.path.join("packages/", package_name)
+              if IsPathInLib(f):
+                output_name = os.path.join(package_path, PackageRelativePath(f))
+          else:
+            output_name = f;
+
+          if output_name is None:
+            continue
+
+          if output_name not in files:
+            files.append(output_name)
+            with zf.open(f) as zff:
+              outfile.writestr(output_name, zff.read())
+
+
+def main():
+  parser = optparse.OptionParser()
+
+  parser.add_option('--inputs', help='List of files to archive.')
+  parser.add_option('--link-inputs',
+      help='List of files to archive. Symbolic links are resolved.')
+  parser.add_option('--zip-inputs', help='List of zip files to re-archive.')
+  parser.add_option('--output', help='Path to output archive.')
+  parser.add_option('--base-dir',
+                    help='If provided, the paths in the archive will be '
+                    'relative to this directory', default='.')
+  options, _ = parser.parse_args()
+
+  inputs = []
+  if (options.inputs):
+    inputs = ast.literal_eval(options.inputs)
+  zip_inputs = []
+  if options.zip_inputs:
+    zip_inputs = ast.literal_eval(options.zip_inputs)
+  output = options.output
+  base_dir = options.base_dir
+
+  DoZip(inputs, zip_inputs, output, base_dir)
+
+if __name__ == '__main__':
+  sys.exit(main())