[vim] Add ninja-powered CrBuild/CrCompileFile functions.

tools/vim/ninja_output.py

Index: tools/vim/ninja_output.py
diff --git a/tools/vim/ninja_output.py b/tools/vim/ninja_output.py
new file mode 100644
index 0000000000000000000000000000000000000000..ec4d27e097f845c4c889b7cb64c0c133fa86b64a
--- /dev/null
+++ b/tools/vim/ninja_output.py
@@ -0,0 +1,44 @@
+# Copyright 2015 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+import os
+import os.path
+
+
+def GetNinjaOutputDirectory(v8_root, configuration=None):
+  """Returns <v8_root>/<output_dir>/(Release|Debug).
+
+  The configuration chosen is the one most recently generated/built, but can be
+  overriden via the <configuration> parameter. Detects a custom output_dir
+  specified by GYP_GENERATOR_FLAGS."""
+
+  output_dir = 'out'
+  generator_flags = os.getenv('GYP_GENERATOR_FLAGS', '').split(' ')
+  for flag in generator_flags:
+    name_value = flag.split('=', 1)
+    if len(name_value) == 2 and name_value[0] == 'output_dir':
+      output_dir = name_value[1]
+
+  root = os.path.join(v8_root, output_dir)
+  if configuration:
+    return os.path.join(root, configuration)
+
+  debug_path = os.path.join(root, 'Debug')
+  release_path = os.path.join(root, 'Release')
+
+  def is_release_newer(test_path):
+    try:
+      debug_mtime = os.path.getmtime(os.path.join(debug_path, test_path))
+    except os.error:
+      debug_mtime = 0
+    try:
+      rel_mtime = os.path.getmtime(os.path.join(release_path, test_path))
+    except os.error:
+      rel_mtime = 0
+    return rel_mtime >= debug_mtime
+
+  if is_release_newer('.ninja_log') or is_release_newer('.ninja_deps'):
+    return release_path
+  return debug_path