#
# 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 os
import sys

from command import PagedCommand


class Manifest(PagedCommand):
    common = True
    helpSummary = "Manifest inspection utility"
    helpUsage = """
%prog [-o {-|NAME.xml} [-r]]
"""
    _helpDescription = """

With the -o option, exports the current manifest for inspection.
The manifest and (if present) local_manifest.xml are combined
together to produce a single manifest file.  This file can be stored
in a Git repository for use during future 'repo init' invocations.

"""

    @property
    def helpDescription(self):
        helptext = self._helpDescription + '\n'
        r = os.path.dirname(__file__)
        r = os.path.dirname(r)
        fd = open(os.path.join(r, 'docs', 'manifest-format.txt'))
        for line in fd:
            helptext += line
        fd.close()
        return helptext

    def _Options(self, p):
        p.add_option('-r', '--revision-as-HEAD',
                     dest='peg_rev', action='store_true',
                     help='Save revisions as current HEAD')
        p.add_option('--suppress-upstream-revision', dest='peg_rev_upstream',
                     default=True, action='store_false',
                     help='If in -r mode, do not write the upstream field.  '
                          'Only of use if the branch names for a sha1 manifest are '
                          'sensitive.')
        p.add_option('-o', '--output-file',
                     dest='output_file',
                     default='-',
                     help='File to save the manifest to',
                     metavar='-|NAME.xml')

    def _Output(self, opt):
        if opt.output_file == '-':
            fd = sys.stdout
        else:
            fd = open(opt.output_file, 'w')
        self.manifest.Save(fd,
                           peg_rev=opt.peg_rev,
                           peg_rev_upstream=opt.peg_rev_upstream)
        fd.close()
        if opt.output_file != '-':
            print('Saved manifest to %s' % opt.output_file, file=sys.stderr)

    def Execute(self, opt, args):
        if args:
            self.Usage()

        if opt.output_file is not None:
            self._Output(opt)
            return

        print('error: no operation to perform', file=sys.stderr)
        print('error: see repo help manifest', file=sys.stderr)
        sys.exit(1)
