Land incremental building of the editor

dart/editor/build/generate_sources.py

Index: dart/editor/build/generate_sources.py
===================================================================
--- dart/editor/build/generate_sources.py	(revision 0)
+++ dart/editor/build/generate_sources.py	(revision 0)
@@ -0,0 +1,161 @@
+#!/usr/bin/env python
+# Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+import StringIO
+import os
+import sys
+
+from os.path import join
+
+
+def _print_gypi_files(out, name, files):
+  out.write("    '%s': [\n" % name)
+  for filename in files:
+    out.write('''      r'%s',%s''' % (filename, '\n'))
+  out.write("    ],\n")
+
+
+def _close(file_name, output):
+  if not isinstance(output, StringIO.StringIO):
+    output.close()
+    return
+  new_text = output.getvalue()
+  output.close()
+  with open(file_name, 'r') as f:
+    old_text = f.read()
+  if old_text == new_text:
+    return
+  with open(file_name, 'w') as f:
+    f.write(new_text)
+
+
+def _make_output(fileName):
+  if os.path.exists(fileName):
+    return StringIO.StringIO()
+  else:
+    return file(fileName, 'w')
+
+
+def GenerateGypiFile(sources, outputFile):
+  gypi = _make_output(outputFile)
+  gypi.write("{\n  'variables': {\n")
+  _print_gypi_files(gypi, 'sources', sources)
+  gypi.write("  },\n}\n")
+  _close(outputFile, gypi)
+
+
+def _list_sources(path, extension):
+  sources = []
+  for fullpath, dirs, filenames in os.walk(path):
+    # Skip directories that start with a dot, such as ".svn".
+    remove_me = [d for d in dirs if d.startswith('.')]
+    for d in remove_me:
+      dirs.remove(d)
+
+    for filename in filenames:
+      if (filename.endswith(extension)):
+        sources.append(os.path.relpath(join(fullpath, filename),
+                                       start='editor/build/generated/'))
+  sources.sort()
+  return sources
+
+
+def _list_pkgs(path):
+  result = None
+  for dirpath, dirnames, filenames in os.walk(path):
+    result = dirnames[:] # Copy array.
+    del dirnames[:] # Stop recursion by clearing array.
+  return result
+
+
+def _split_sources(path, extension):
+  result = []
+  count = 100
+  segment = -1
+  sources = None
+  for source in _list_sources(path, extension):
+    if count == 100:
+      count = 0
+      segment += 1
+      sources = []
+      result.append(('chunk%s' % segment, sources))
+    sources.append(source)
+    count += 1
+  return result
+
+def _print_pkg_action(pkg, out):
+  print >> out, """
+        {
+          'includes': [
+            '%(pkg)s_sources.gypi',
+          ],
+          'action_name': '%(pkg)s_action',
+          'inputs': [
+            '%(pkg)s_sources.gypi',
+            '<@(sources)',
+          ],
+          'outputs': [
+            '<(SHARED_INTERMEDIATE_DIR)/editor_deps/%(pkg)s.stamp',
+          ],
+          'action': [
+            'python',
+            '../truncate_files.py',
+            '<@(_outputs)',
+          ],
+          'message': 'Creating %(pkg)s time stamp.',
+        },
+""" % {'pkg':pkg}
+
+
+def Main(argv):
+  # move up to the parent 'dart' directory
+  base_directory = join(os.path.dirname(argv[0]), '..', '..')
+  os.chdir(base_directory)
+
+  pkg_dir = join('editor', 'tools', 'plugins')
+  out_dir = join('editor', 'build', 'generated')
+
+  if not os.path.exists(out_dir):
+    os.mkdir(out_dir)
+
+  with open(join(out_dir, 'editor_deps.gyp'), 'w') as gyp:
+    stamps = []
+    print >> gyp, """
+{
+  'targets': [
+    {
+      'target_name': 'editor_deps',
+      'type': 'none',
+      'actions': ["""
+
+    for pkg, sources in _split_sources(pkg_dir, '.java'):
+      GenerateGypiFile(sources, join(out_dir, '%s_sources.gypi' % pkg))
+      _print_pkg_action(pkg, gyp)
+      stamps.append("'<(SHARED_INTERMEDIATE_DIR)/editor_deps/%s.stamp'" % pkg)
+
+    print >> gyp, """
+        {
+          'action_name': 'editor_stamp_action',
+          'inputs': [
+            %s,
+          ],
+          'outputs': [
+            '<(SHARED_INTERMEDIATE_DIR)/editor_deps/editor.stamp',
+          ],
+          'action': [
+            'python',
+            '../truncate_files.py',
+            '<@(_outputs)',
+          ],
+          'message': 'Creating editor time stamp.',
+        },
+      ],
+    },
+  ],
+}
+""" % (",\n".join(stamps))
+
+if __name__ == '__main__':
+  sys.exit(Main(sys.argv))