#!/usr/bin/python -u
# vim: set fileencoding=utf-8 :
#
# (C) 2011 Guido Guenther <agx@sigxcpu.org>
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import os
import shutil
import subprocess
import sys
import tempfile
import puppethooks.git as git
import puppethooks.checkers as checkers

debug = True

def main(argv):
    tmpdir = None
    ret = 0
    zero = '0000000000000000000000000000000000000000'

    try:
        os.environ['GIT_DIR']
    except KeyError:
        print >>sys.stderr, "Don't run this script from the command line."
        sys.exit(1)

    refname, oldrev, newrev = sys.argv[1:4]
    if zero in [oldrev, newrev]:
        return 0

    print "Checking files syntax."
    try:
        tmpdir = tempfile.mkdtemp()

        for old_mode, new_mode, old_sha, new_sha, status, name in git.diff_tree(oldrev, newrev):
            if new_sha == zero:
                continue

            try:
                extension = name.rsplit('.',1)[-1]
            except IndexError:
                continue

            try:
                if debug:
                    print "Checking %s" % name
                git.do_check(name, tmpdir, new_sha)
            except KeyError:
                continue
            except checkers.CheckFailed:
                print >>sys.stderr, "Syntax check of '%s' failed" % name
                ret = 1
    finally:
        if tmpdir:
            shutil.rmtree(tmpdir)

    print "Checking files syntax done. %s" % ["", "Will deny commit due to errors."][ret]
    return ret

if __name__ == '__main__':
    sys.exit(main(sys.argv))

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