vim: Add a ninja-powered "Compile this file" function.

BUG=none
TEST=`:so /path/to/src/tools/vim/ninja-build.vim`, hit cmd-k.

Review URL: https://chromiumcodereview.appspot.com/9231001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@117860 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 86 insertions, 0 deletions

diff --git a/tools/vim/ninja-build.vim b/tools/vim/ninja-build.vim
new file mode 100644
index 0000000..a882223
--- /dev/null
+++ b/tools/vim/ninja-build.vim
@@ -0,0 +1,86 @@
+" Copyright (c) 2011 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.
+"
+" Adds a "Compile this file" function, using ninja. On Mac, binds Cmd-k to
+" this command.
+"
+" Requires that gyp has already generated build.ninja files, and that ninja is
+" in your path (which it is automatically if depot_tools is in your path).
+"
+" Add the following to your .vimrc file:
+"     so /path/to/src/tools/vim/ninja-build.vim
+
+python << endpython
+import os
+import vim
+
+
+def path_to_current_buffer():
+  """Returns the absolute path of the current buffer."""
+  return vim.current.buffer.name
+
+
+def path_to_source_root():
+  """Returns the absolute path to the chromium source root."""
+  candidate = os.path.dirname(path_to_current_buffer())
+  # This is a list of files that need to identify the src directory. The shorter
+  # it is, the more likely it's wrong (checking for just "build/common.gypi"
+  # would find "src/v8" for files below "src/v8", as "src/v8/build/common.gypi"
+  # exists). The longer it is, the more likely it is to break when we rename
+  # directories.
+  fingerprints = ['chrome', 'net', 'v8', 'build', 'skia']
+  while candidate and not all(
+      [os.path.isdir(os.path.join(candidate, fp)) for fp in fingerprints]):
+    candidate = os.path.dirname(candidate)
+  return candidate
+
+
+def guess_configuration():
+  """Default to the configuration with either a newer build.ninja or a newer
+  protoc."""
+  root = os.path.join(path_to_source_root(), 'out')
+  def is_release_15s_newer(test_path):
+    try:
+      debug_mtime = os.path.getmtime(os.path.join(root, 'Debug', test_path))
+      rel_mtime = os.path.getmtime(os.path.join(root, 'Release',  test_path))
+      return rel_mtime - debug_mtime >= 15
+    except os.error:
+      return False
+  configuration = 'Debug'
+  if is_release_15s_newer('build.ninja') or is_release_15s_newer('protoc'):
+    configuration = 'Release'
+  return configuration
+
+
+def compute_ninja_command(configuration=None):
+  """Returns the shell command to compile the file in the current buffer."""
+  if not configuration: configuration = guess_configuration()
+  build_dir = os.path.join(path_to_source_root(), 'out', configuration)
+
+  # ninja needs filepaths for the ^ syntax to be relative to the
+  # build directory.
+  file_to_build = path_to_current_buffer()
+  file_to_build = os.path.relpath(file_to_build, build_dir)
+
+  return ' '.join(['ninja', '-C', build_dir, file_to_build + '^'])
+
+
+def set_makepgr_to_single_file_ninja():
+  vim.command('let &makeprg="%s"' % compute_ninja_command())
+endpython
+
+fun! CrCompileFile()
+  let l:oldmakepgr = &makeprg
+  python set_makepgr_to_single_file_ninja()
+  silent make | cwindow
+  let &makeprg = l:oldmakepgr
+endfun
+
+command! CrCompileFile call CrCompileFile()
+
+if has('mac')
+  map <D-k> :CrCompileFile<cr>
+  imap <D-k> <esc>:CrCompileFile<cr>
+endif
+" TODO(linuxuser): Suggest a keyboard shortcut and send review to thakis@.