#
# 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
from progress import Progress


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()

        nb = args[0]
        err = []
        success = []
        all_projects = self.GetProjects(args[1:])

        pm = Progress('Checkout %s' % nb, len(all_projects))
        for project in all_projects:
            pm.update()

            status = project.CheckoutBranch(nb)
            if status is not None:
                if status:
                    success.append(project)
                else:
                    err.append(project)
        pm.end()

        if err:
            for p in err:
                print("error: %s/: cannot checkout %s" % (p.relpath, nb),
                      file=sys.stderr)
            sys.exit(1)
        elif not success:
            print('error: no project has branch %s' % nb, file=sys.stderr)
            sys.exit(1)
