Add willis, a tool to show the status of your entire source tree.

host/willis

Index: host/willis
diff --git a/host/willis b/host/willis
new file mode 100755
index 0000000000000000000000000000000000000000..e031651e78b9cbc8bc4c6866e63e6d0a2f4ffb90
--- /dev/null
+++ b/host/willis
@@ -0,0 +1,108 @@
+#!/usr/bin/env python
+# 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.
+
+"""Display active git branches and code changes in a ChromiumOS workspace."""
+
+import os
+import re
+import subprocess
+import sys
+
+def RunCommand(path, command):
+  """Run a command in a given directory, return stdout"""

[Kenneth Waters, 2011/02/01 00:56:04]

Period after stdout.  And a blank line after the docstring.

[robotboy, 2011/02/01 20:44:55]

Done.

+  return subprocess.Popen(command,
+                          cwd=path,
+                          stdout=subprocess.PIPE).communicate()[0].rstrip()
+
+#
+# Taken with slight modification from gclient_utils.py in the depot_tools
+# project.
+#
+def FindFileUpwards(filename, path):
+  """Search upwards from the a directory to find a file."""

[Kenneth Waters, 2011/02/01 00:56:04]

Blank line after the docstring.

[robotboy, 2011/02/01 20:44:55]

Done.

+  path = os.path.realpath(path)
+  while True:
+    file_path = os.path.join(path, filename)
+    if os.path.exists(file_path):
+      return file_path
+    (new_path, _) = os.path.split(path)
+    if new_path == path:
+      return None
+    path = new_path
+
+
+def ShowName(relative_name, color):
+  """Display the directory name."""
+
+  if color:
+    sys.stdout.write('%s[44m%s[37m%s%s[0m\n' %

[Kenneth Waters, 2011/02/01 00:56:04]

'\033[44m\033[37m%s\033[0m\n'

[Kenneth Waters, 2011/02/01 00:56:04]

Why not print?

[robotboy, 2011/02/01 20:44:55]

Done.

[robotboy, 2011/02/01 20:44:55]

Cut and paste-itis.  Fixed, thanks.

+                     (chr(27), chr(27), relative_name, chr(27)))
+  else:
+    sys.stdout.write('%s\n' % relative_name)
+
+
+def ShowDir(full_name, relative_name, color):
+  """Display active work in a single git repo."""
+
+  lines_printed = 0
+  command = ['git', 'branch', '-vv']
+
+  if color:
+    command.append('--color')
+
+  branch = RunCommand(full_name, command)
+  lines  = branch.splitlines()
+
+  if (len(lines) > 1 or
+      (len(lines) == 1 and not re.search("\(no branch\)", lines[0]))) :

[Kenneth Waters, 2011/02/01 00:56:04]

"\(no branch\)" is almost certainly wrong.  Did you mean r"\(no branch\)"?

[robotboy, 2011/02/01 20:44:55]

Yes, thanks, done.

+    if lines_printed == 0:
+      ShowName(relative_name, color)
+    lines_printed += 1
+    print branch
+
+  status = RunCommand(full_name, ['git', 'status', '-s'])
+
+  if len(status.splitlines()) > 0:

[Kenneth Waters, 2011/02/01 00:56:04]

if status.splitlines():

[robotboy, 2011/02/01 20:44:55]

Done.

+    if lines_printed == 0:
+      ShowName(relative_name, color)
+    if lines_printed == 1:
+      print '---------------'
+    lines_printed += 1
+    print status
+
+  if lines_printed > 0:
+    print ""
+
+
+def FindRoot():
+  """Returns the repo root."""

[Kenneth Waters, 2011/02/01 00:56:04]

Add blank line after docstring.

[robotboy, 2011/02/01 20:44:55]

Done.

+  repo_file = '.repo'
+  repo_path = FindFileUpwards(repo_file, os.getcwd())
+
+  if not repo_path:

[Kenneth Waters, 2011/02/01 00:56:04]

if repo_path is None:

not "" -> True

[robotboy, 2011/02/01 20:44:55]

Done.

+    raise Exception('Failed to find %s.' % repo_file)
+
+  return os.path.dirname(repo_path)
+
+
+def main():
+  """Take no arguments."""
+
+  color = os.isatty(1)
+  base = os.path.basename(os.getcwd())
+  root = FindRoot()
+  repos = RunCommand(root, ['repo', 'forall', '-c', 'pwd']).splitlines()
+
+  # We want to use the full path for testing, but we want to use the relative
+  # path for display.
+  fulldirs = map(lambda(p): os.path.normpath(os.path.join(root, p)), repos)

[Kenneth Waters, 2011/02/01 00:56:04]

fulldirs = [os.path.normpath(os.path.join(root, p)) for p in repos]

[robotboy, 2011/02/01 20:44:55]

Done.

+  reldirs = map(lambda(p): re.sub('^' + base, '.', p), repos)

[Kenneth Waters, 2011/02/01 00:56:04]

reldirs = [re.sub('^' + re.escape(base), '.', p) for p in repos]

map() is frowned on.  re.escape is necessary in case base has magic characters.

[robotboy, 2011/02/01 20:44:55]

Done.

+
+  for full_path, relative_path in zip(fulldirs, reldirs):
+    ShowDir(full_path, relative_path, color)
+
+
+if __name__ == '__main__':
+  main()