#!/usr/bin/env python

"""
Dirty script for building package for PPA
by WangLu
2011.01.13

modified for pdf2htmlEX
2012.08.28

modified for general git repo
2013.05.30
"""


import os
import sys
import re
import time

package='pdf2htmlex'
ppa_name='ppa:coolwanglu/pdf2htmlex'
supported_distributions=('precise', 'trusty')
dist_pattern=re.compile('|'.join(['\\) '+i for i in supported_distributions]))
archive_cmd='(rm CMakeCache.txt || true) && cmake . && make dist'
archive_suffix='.tar.bz2'

print 'Generating version...'
try:
    version = re.findall(r'set\(PDF2HTMLEX_VERSION\s*"([^"]*)"\)', open('CMakeLists.txt').read())[0]
except:
    print 'Cannot get package name and version number'
    sys.exit(-1)

try:
    rev = open('.git/refs/heads/master').read()[:5]
except:
    print 'Cannot get revision number'
    sys.exit(-1)

projectdir=os.getcwd()
today_timestr = time.strftime('%Y%m%d%H%M')
deb_version = version+'-1~git'+today_timestr+'r'+rev
full_deb_version = deb_version+'-0ubuntu1'

#check if we need to update debian/changelog
with open('debian/changelog') as f:
    if re.findall(r'\(([^)]+)\)', f.readline())[0] == full_deb_version:
        print
        print 'No need to update debian/changelog, skipping'
    else:
        print
        print 'Writing debian/changelog'
        if os.system('dch -v "%s"' % (full_deb_version,)) != 0:
            print 'Failed when updating debian/changelog'
            sys.exit(-1)

# changelog may have been updated, reopen it
with open('debian/changelog') as f:
    #check dist mark of changelog
    changelog = f.read()
    m = dist_pattern.search(changelog)
    if m is None or m.pos >= changelog.find('\n'):
        print 'Cannot locate the dist name in the first line of changelog'
        sys.exit(-1)

print
print 'Preparing build ...'
# handling files
if os.system(archive_cmd) != 0:
    print 'Failed in creating tarball'
    sys.exit(-1)

orig_tar_filename = package+'-'+version+archive_suffix
if os.system('test -e %s && cp %s ../build-area/' % (orig_tar_filename, orig_tar_filename)) != 0:
    print 'Cannot copy tarball file to build area'
    sys.exit(-1)

deb_orig_tar_filename = package+'_'+deb_version+'.orig'+archive_suffix

try:
    os.chdir('../build-area')
except:
    print 'Cannot find ../build-area'
    sys.exit(-1)

# remove old dir
os.system('rm -rf %s' % (package+'-'+version,))

if os.system('mv %s %s && tar -xvf %s' % (orig_tar_filename, deb_orig_tar_filename, deb_orig_tar_filename)) != 0:
    print 'Cannot extract tarball'
    sys.exit(-1)

try:
    os.chdir(package+'-'+version)
except:
    print 'Cannot enter project dir'
    sys.exit(-1)

os.system('cp -r %s/debian .' % (projectdir,))

for cur_dist in supported_distributions:
    print
    print 'Building for ' + cur_dist + ' ...'
    # substitute distribution name 
    with open('debian/changelog', 'w') as f:
        f.write(dist_pattern.sub('~%s1) %s' % (cur_dist, cur_dist), changelog, 1))

    # building
    if os.system('debuild -S -sa') != 0:
        print 'Failed in debuild'
        sys.exit(-1)

    """
    print
    sys.stdout.write('Everything seems to be good so far, upload?(y/n)')
    sys.stdout.flush()
    ans = raw_input().lower()
    while ans not in ['y', 'n']:
        sys.stdout.write('I don\'t understand, enter \'y\' or \'n\':')
        ans = raw_input().lower()

    if ans == 'n':
        print 'Skipped.'
        sys.exit(0)
    """

    print 'Uploading'   
    if os.system('dput %s ../%s' % (ppa_name, package+'_'+full_deb_version+'~'+cur_dist+'1_source.changes')) != 0:
        print 'Failed in uploading by dput'
        sys.exit(-1)

print 'Build area not cleaned.'
print 'All done. Cool!'