[cr tool] Adding the install command

tools/cr/cr/commands/install.py

+# Copyright 2013 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.
+
+"""A module for the install command."""
+
+import cr
+
+
+class InstallCommand(cr.Command):
+  """The implementation of the install command.
+
+  This first uses Builder.Build to bring the target up to date, and then
+  installs it using Installer.Reinstall.
+  You can set the builder to a skip version to bypass that stage.

[bulach, 2013/12/02 18:33:09]

this comment is a bit cryptic.. :) is it a command line flag? or a config? it
may be clearer as something like:
"Use --skip to bypass the build check stage"
or
"Do xyx to bypass the build check stage"

+  """
+
+  def __init__(self):
+    super(InstallCommand, self).__init__()
+    self.help = 'Install a binary'
+
+  def AddArguments(self, subparsers):
+    parser = super(InstallCommand, self).AddArguments(subparsers)
+    cr.Builder.AddArguments(self, parser)
+    cr.Installer.AddArguments(self, parser)
+    cr.Target.AddArguments(self, parser, allow_multiple=True)
+    self.ConsumeArgs(parser, 'the installer')
+    return parser
+
+  def Run(self, context):
+    targets = cr.Target.GetTargets(context)
+    if not cr.Installer.Skipping(context):
+      cr.Builder.Build(context, targets, [])
+    cr.Installer.Reinstall(context, targets, context.remains)