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1# Copyright 2013 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5"""Chromium cr tool main module.
6
7Holds the main function and all it's support code.
8"""
9
10import os
11import sys
12import cr
13import cr.auto.user
14import cr.autocomplete
15import cr.loader
16
17_CONTACT = 'iancottrell@chromium.org'
18
19
20def Main():
21  """Chromium cr tool main function.
22
23  This is the main entry point of the cr tool, it finds and loads all the
24  plugins, creates the context and then activates and runs the specified
25  command.
26  """
27
28  # Add the users plugin dir to the cr.auto.user package scan
29  user_path = os.path.expanduser(os.path.join('~', '.config', 'cr'))
30  cr.auto.user.__path__.append(user_path)
31
32  cr.loader.Scan()
33
34  # Build the command context
35  context = cr.Context(
36      description='The chrome dev build tool.',
37      epilog='Contact ' + _CONTACT + ' if you have issues with this tool.',
38  )
39  # Install the sub-commands
40  for command in cr.Command.Plugins():
41    context.AddSubParser(command)
42
43  # test for the special autocomplete command
44  if context.autocompleting:
45    # After plugins are loaded so pylint: disable=g-import-not-at-top
46    cr.autocomplete.Complete(context)
47    return
48  # Speculative argument processing to add config specific args
49  context.ParseArgs(True)
50  cr.plugin.Activate(context)
51  # At this point we should know what command we are going to use
52  command = cr.Command.GetActivePlugin(context)
53  # Do some early processing, in case it changes the build dir
54  if command:
55    command.EarlyArgProcessing(context)
56  # Update the activated set again, in case the early processing changed it
57  cr.plugin.Activate(context)
58  # Load the build specific configuration
59  found_build_dir = cr.base.client.LoadConfig(context)
60  # Final processing or arguments
61  context.ParseArgs()
62  cr.plugin.Activate(context)
63  # If we did not get a command before, it might have been fixed.
64  if command is None:
65    command = cr.Command.GetActivePlugin(context)
66  # If the verbosity level is 3 or greater, then print the environment here
67  if context.verbose >= 3:
68    context.DumpValues(context.verbose > 3)
69  if command is None:
70    print context.Substitute('No command specified.')
71    exit(1)
72  if command.requires_build_dir:
73    if not found_build_dir:
74      if not context.Find('CR_OUT_FULL'):
75        print context.Substitute(
76            'No build directory specified. Please use cr init to make one.')
77      else:
78        print context.Substitute(
79            'Build {CR_BUILD_DIR} not a valid build directory')
80      exit(1)
81    if context.Find('CR_VERSION') != cr.base.client.VERSION:
82      print context.Substitute(
83          'Build {CR_BUILD_DIR} is for the wrong version of cr')
84      print 'Please run cr init to reset it'
85      exit(1)
86    cr.Platform.Prepare(context)
87  if context.verbose >= 1:
88    print context.Substitute(
89        'Running cr ' + command.name + ' for {CR_BUILD_DIR}')
90  # Invoke the given command
91  command.Run(context)
92
93if __name__ == '__main__':
94  sys.exit(Main())
95