#/usr/bin/python
#
# A first simplistic try at a release helper script
# Derek Feichtinger <derek.feichtinger@psi.ch>

import subprocess
import sys
import os
import shutil
from optparse import OptionParser
#from distutils.version import StrictVersion
# StrictVersion('10.4.10') > StrictVersion('10.4.9')
# or use distribute package:
#from pkg_resources import parse_version
#parse_version('1.4') > parse_version('1.4-rc2')

import ldapuserdir

def git_is_current():
    sp = subprocess.Popen(['git', 'status', '--porcelain',
                       '--untracked-files=no'],
                          shell = False,
                          stdout = subprocess.PIPE,
                          stderr = subprocess.PIPE)
    (stdout, stderr) = sp.communicate()
    if sp.returncode != 0:
        raise RuntimeError(stderr)
    if stdout.strip() == '':
        return True
    return False

def git_describe(*args):
    cmd = ['git','describe']
    if args:
        cmd.extend(args)
    sp = subprocess.Popen(cmd,
                          shell = False,
                          stdout = subprocess.PIPE,
                          stderr = subprocess.PIPE)
    (stdout, stderr) = sp.communicate()
    if sp.returncode != 0:
        raise RuntimeError(stderr)
    return stdout.strip()

################################################
# OPTION PARSING
usage = """%prog [options] groupname [usernames]
"""

parser = OptionParser(usage = usage)
parser.add_option('-t', '--test',
                  action = 'store_true',
                  dest = 'flag_test',
                  help = 'do a test release (do not stop at errors)',
                  default = False
)

(options, args) = parser.parse_args()

flag_test = options.flag_test

if not git_is_current():
    sys.stderr.write('Error: Repository is not current compared to ' +
                     'working environment.\nRefusing to release\n')
    if not flag_test:
        sys.exit(0)

git_d = git_describe('--tags')
if git_d != 'v' + ldapuserdir.__version__:
    sys.stderr.write('Git-describe (%s) differs from internal package' % git_d
                     + 'version (%s)\n' % ldapuserdir.__version__)
    sys.stderr.write('You need to tag the distribution\n')
    if not flag_test:
        sys.exit(0)

# make backup of current setup.cfg
shutil.copy('setup.cfg','setup.cfg.bup')

# TODO: this should be done through a template
# add options needed for the distribution
fd = open('setup.cfg','a')
fd.write("""
[build]
executable=/usr/bin/python

[install]
prefix=/usr

[bdist_rpm]
Release=1.el6
Group=Applications/Internet
Vendor=PSI
Packager=Derek Feichtinger
#Provides
Requires=python-ldap
#Conflicts
#Obsoletes
#Distribution
#BuildRequires
#Icon
""")
fd.close()

# clean the build dir first
sp = subprocess.Popen(['python','setup.py','clean','--all'],
                      shell = False,
                      stdout = subprocess.PIPE,
                      stderr = subprocess.PIPE)
(stdout, stderr) = sp.communicate()
if sp.returncode != 0:
    raise RuntimeError(stderr)
sys.stdout.write(stdout)

# Run the RPM build
sp = subprocess.Popen(['python','setup.py','bdist_rpm'],
                      shell = False,
                      stdout = subprocess.PIPE,
                      stderr = subprocess.PIPE)
(stdout, stderr) = sp.communicate()
if sp.returncode != 0:
    raise RuntimeError(stderr)
sys.stdout.write(stdout)

shutil.copy('setup.cfg','setup.cfg.rpm')
shutil.copy('setup.cfg.bup','setup.cfg')