#!/usr/bin/env python3
"""
Test a mercurial merge.
"""

import sys, os, logging, tempfile, shutil, re
from subprocess import *
from os.path import *



def run_hg(cmd, *args, **kwds):
    kwds['shell'] = 1
    return call('hg ' + cmd, *args, **kwds)

def main():
    import optparse
    parser = optparse.OptionParser(__doc__.strip())
    opts, args = parser.parse_args()

    logging.basicConfig(level=logging.INFO)

    # Delete all previous test directories.
    tmproot = tempfile.gettempdir()
    for fn in os.listdir(tmproot):
        if re.match('hgtest\.', fn):
            dn = join(tmproot, fn)
            logging.info('Deleting %s' % dn)
            shutil.rmtree(dn, ignore_errors=1)

    tmpdir = tempfile.mkdtemp(prefix='hgtest.')
    logging.info('Temporary directory: %s' % tmpdir)

    # Create a repository.
    repo1 = join(tmpdir, 'repo1')
    os.mkdir(repo1)
    os.chdir(repo1)
    open('file', 'w').write('**\noriginal\n**\n')

    run_hg('init')
    run_hg('addremove')
    run_hg('commit -m "Initial commit"')

    # Edit the repository.
    open('file', 'w').write('**\nleft\n**\n')
    run_hg('commit -m "edit 1"', shell=True)

    # Edit on the other side.
    run_hg('update -C -r 0')

    open('file', 'w').write('**\nright\n**\n')
    run_hg('commit -m "edit 2"')

    run_hg('update -C -r 1')
    run_hg('merge -r 2')

    run_hg('commit -m "merged"')

    run_hg('view')

    print
    print open('file', 'r').read()
    print

    print
    print 'cd %s' % repo1


if __name__ == '__main__':
    main()


