#
# Copyright (C) 2009 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import sys
from command import Command

class Checkout(Command):
  common = True
  helpSummary = "Checkout a branch for development"
  helpUsage = """
%prog <branchname> [<project>...]
"""
  helpDescription = """
The '%prog' command checks out an existing branch that was previously
created by 'repo start'.

The command is equivalent to:

  repo forall [<project>...] -c git checkout <branchname>
"""

  def Execute(self, opt, args):
    if not args:
      self.Usage()

    retValue = 0;

    branch = args[0]
    for project in self.GetProjects(args[1:]):
      if not project.CheckoutBranch(branch):
        retValue = 1;
        print >>sys.stderr, "error: checking out branch '%s' in %s failed" % (branch, project.name)

    if (retValue != 0):
      sys.exit(retValue);