#!/usr/bin/python
# Copyright 2011  Lars Wirzenius
# 
# 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 3 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, see <http://www.gnu.org/licenses/>.


import cliapp
import ConfigParser
import debian.deb822
import glob
import logging
import os
import shutil
import subprocess


__version__ = '0.0'


class Unperish(cliapp.Application):

    metafilename = 'project.meta'
    
    def add_settings(self):
        self.settings.string(['build-area'], 
                             'where should results go? (%default)',
                             default='..')
        self.settings.string(['basetgz'], 'pbuilder basetgz (%default)',
                             default='/var/cache/pbuilder/base.tgz')
    
    def process_args(self, args):
        self.meta = self.read_meta()
        self.debian_control = debian.deb822.Deb822(open('debian/control'))
        return cliapp.Application.process_args(self, args)

    @property
    def upstream_name(self):
        return self.meta.get('project', 'name')

    @property
    def upstream_version(self):
        return self.meta.get('project', 'version')

    @property
    def upstream_tarball(self):
        return '%s-%s.tar.gz' % (self.upstream_name, self.upstream_version)

    @property
    def debian_source_package(self):
        return self.debian_control['Source']

    @property
    def debian_tarball(self):
        return '%s_%s.orig.tar.gz' % (self.debian_source_package,
                                       self.upstream_version)

    @property
    def dirname(self):
        return '%s-%s' % (self.debian_source_package, self.upstream_version)

    def cmd_dump_meta(self, args):
        self.meta.write(self.output)

    def cmd_export(self, args):
        self.runcmd('bzr', 'export', self.join(self.dirname))

    def cmd_debian_tarball(self, args):
        origtar = self.join(self.debian_tarball)
        self.runcmd('bzr', 'export', origtar)

    def cmd_dsc(self, args):
        self.runcmd('dpkg-source', '-b', self.dirname, 
                    cwd=self.settings['build-area'])

    def cmd_deb(self, args):
        dsc = glob.glob(self.join('*.dsc'))[0]
        argv = ['sudo', 
                'pbuilder', 
                '--build', 
                '--basetgz', self.settings['basetgz'],
                '--buildresult', self.settings['build-area'],
                '--logfile', self.join('pbuilder.log'),
                dsc]
        self.runcmd(*argv, cwd=self.settings['build-area'])

    def read_meta(self):
        cp = ConfigParser.RawConfigParser()
        cp.read(self.metafilename)
        return cp

    def join(self, pathname):
        return os.path.join(self.settings['build-area'], pathname)

    def runcmd(self, *argv, **kwargs):
        logging.debug('runcmd: %s' % repr(argv))
        p = subprocess.Popen(argv, 
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE, 
                             **kwargs)
        out, err = p.communicate()
        if p.returncode:
            raise cliapp.AppException('command failed: %s\n%s' % (argv, err))
        return out


if __name__ == '__main__':
    Unperish(version=__version__).run()