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#!/usr/bin/env python

import os
import re
import urllib
import csv
import datetime
import time
from string import Template
from optparse import OptionParser

last_tag_pattern = 'EMPATHY_2_32*'
upload_server = 'master.gnome.org'
template = '''\
$name $version is now available for download from:
$download

$md5sums

What is it?
===========
$about

You can visit the project web site:
$website

What's New?
===========
$news

$footer'''

class Bug:
    number = ''
    author = ''

class Project:
    def __init__(self):
        f = open('config.h', 'r')
        s = f.read()
        f.close()

        key = {}
        key['package'] = '#define PACKAGE_NAME "'
        key['version'] = '#define PACKAGE_VERSION "'
        key['bugreport'] = '#define PACKAGE_BUGREPORT "'

        for line in s.splitlines(1):
            if line.startswith(key['package']):
                p1 = len(key['package'])
                p2 = line.rfind('"')
                self.package_name = line[p1:p2]         
            elif line.startswith(key['version']):
                p1 = len(key['version'])
                p2 = line.rfind('"')
                self.package_version = line[p1:p2]      
            elif line.startswith(key['bugreport']):
                p2 = line.rfind('"')
                p1 = line.rfind('=') + 1
                self.package_module = line[p1:p2]       

        first = self.package_version.find('.')
        second = self.package_version.find('.', first + 1)
        if first == -1 or second == -1 or first == second:
            version_dir = self.package_version
        else:
            version_dir = self.package_version[:second]
        self.package_dl_url = 'http://download.gnome.org/sources/%s/%s/' % (self.package_name.lower(), 
                                            version_dir)
        tags_str = self.exec_cmd('git tag -l %s' % (last_tag_pattern))
        tags = tags_str.splitlines()
        self.last_tag = tags[len(tags)-1]

    def exec_cmd(self,cmd):
        return os.popen(cmd).read()

    def get_news(self):
        f = open ('NEWS', 'r')
        s = f.read()
        f.close()
        start = s.find ('NEW in '+ self.package_version)
        if start != -1:
            start = s.find ('\n', start) + 1
            start = s.find ('\n', start) + 1
                end = s.find ('NEW in', start) - 1
                return s[start:end].strip()

    def get_md5sums(self):
        md5sums = ''

        cmd = 'md5sum %s-%s.tar.gz' % (self.package_name.lower(), self.package_version)
        md5sums += self.exec_cmd(cmd)

        cmd = 'md5sum %s-%s.tar.bz2' % (self.package_name.lower(), self.package_version)
        md5sums += self.exec_cmd(cmd).strip()

        return md5sums

    def get_bugzilla_info(self):
        query = 'http://bugzilla.gnome.org/browse.cgi?product=%s' % (self.package_module)
        f = urllib.urlopen(query)
        s = f.read()
        f.close()

        s1 = '<p><i>'
        i = s.find(s1)
        start = i + len(s1)
        s2 = '</i></p>'
        end = s.find(s2, i + 1)
        description = s[start:end]

        s1 = "homepage"
        i = s.find(s1)
        s1 = "href"
        i = s.rfind(s1, 0, i)
        start = i + 6
        s2 = '">'
        end = s.find(s2, start)
        project_url = s[start:end]

        return (description, project_url)

    def get_release_notes(self):
        name = self.package_name
        version = self.package_version
        download = self.package_dl_url
        md5sums = self.get_md5sums()
        (about, website) = self.get_bugzilla_info()
        news = self.get_news()
        footer = '%s\n%s team' % (datetime.date.today().strftime('%d %B %Y'),\
                      self.package_name)

        t = Template(template)
        return t.substitute(locals())
    
    def get_translations(self, cmd, format):
        translations = ''
        files_str = self.exec_cmd(cmd)
        files = files_str.splitlines()
        for line in files:
            f = line[line.rfind(' '):]
            lang = f[f.rfind('/')+1:f.rfind('.')]
            commit_str = self.exec_cmd("git log %s..  %s" % (self.last_tag, f))
            if commit_str == '':
                continue

            authors = ''
            for line in commit_str.splitlines():
                if line.startswith('Author:'):
                        p1 = line.find(' ')
                        p2 = line.find('<')
                        author = line[p1:p2].strip()

                    if authors.find(author) != -1:
                        continue
                        if authors != '':
                            authors += ", "
                        authors += author

            translations += format % (lang, authors)
        return translations

    def get_bug_author(self, bug_number):
        cmd = 'git log %s.. | grep -B 20 -E "(bug %s|#%s)"' \
              ' | tac | grep ^Author: | head -1' \
              % (self.last_tag, bug_number, bug_number)
        line = self.exec_cmd (cmd)
        p1 = line.find(" ")
        p2 = line.find("<")

        return line[p1:p2].strip()

    def get_bugs(self):
        commit_str = self.exec_cmd('git show %s' % (self.last_tag))
        for line in commit_str.splitlines():
            if line.startswith('Date:'):
                time_str = line[5:line.rfind('+')].strip()
                t = time.strptime(time_str)
                last_tag_date = time.strftime('%Y-%m-%d', t)
                break

        query = 'http://bugzilla.gnome.org/buglist.cgi?' \
            'ctype=csv&product=empathy&' \
            'bug_status=RESOLVED,CLOSED,VERIFIED&resolution=FIXED&' \
            'chfieldfrom=%s&chfieldto=Now' % (last_tag_date)
        f = urllib.urlopen(query)
        s = f.read()
        f.close()

        col_bug_id = -1
        col_description = -1

        reader = csv.reader(s.splitlines(1))
        header = reader.next()
        i = 0

        for col in header:
            if col == 'bug_id':
                col_bug_id = i
            if col == 'short_short_desc':
                col_description = i
            i = i + 1

        bugs = ''
        for row in reader:
            bug_number = row[col_bug_id]
            description = row[col_description]
            author = self.get_bug_author(bug_number)
            bugs += ' - Fixed #%s, %s' % (bug_number, description)
            if author != '':
                bugs += ' (%s)' % (author)
            bugs += '\n'
        return bugs

    def generate_news(self):
        translations = self.get_translations("ls -l po/*.po", \
            " - Updated %s Translation (%s)\n")
        help_translations = self.get_translations("ls -l help/*/*.po", \
            " - Updated %s Documentation translation (%s)\n")
        bugs = self.get_bugs()

        news = 'NEW in '+ self.package_version
        line = '=' * len(news)
        today = datetime.date.today()
        news += ' (%s)\n%s\n' % (today.strftime('%d/%m/%Y'),line)
        if bugs != '':
            news += 'Bugs fixed:\n' + bugs + '\n'
        if translations != '':
            news += 'Translations:\n' + translations + '\n'
        if help_translations != '':
            news += 'Documentation translations:\n' + \
                    help_translations + '\n'

        return news

    def write_news(self):
        news = self.generate_news()

        f = open ('/tmp/NEWS', 'w')
        s = f.write(news)
        f.close()

        self.exec_cmd('cat NEWS >> /tmp/NEWS')
        self.exec_cmd('mv /tmp/NEWS .')

    def make_tag(self):
        new_tag = self.package_name.upper() + '_' +\
              self.package_version.replace('.', '_')
        self.exec_cmd('git tag -m "Tagged for release %s." %s' % ( self.package_version, new_tag))

    def _get_username(self):
        username = os.environ.get('GNOME_ACCOUNT_NAME')
        if username is not None:
            return username
            
        return os.getlogin()
        

    def upload_tarball(self):
        username = self._get_username()
        tarball = '%s-%s.tar.gz' % (self.package_name.lower(), self.package_version)

        cmd = 'scp %s %s@%s:' % (tarball, username, upload_server)
        self.exec_cmd(cmd)

        cmd = 'ssh %s@%s install-module -u %s' % (username, upload_server, tarball)
        self.exec_cmd(cmd)

    def send_email(self):
        notes = self.get_release_notes()
        cmd = 'xdg-email ' \
              ' --cc telepathy@lists.freedesktop.org' \
              ' --subject "ANNOUNCE: Empathy %s"' \
              ' --body "%s"' \
              ' gnome-announce-list@gnome.org' % (self.package_version,
                                  notes.replace('"', '\\"'))
        self.exec_cmd(cmd)

    def release(self):
        self.make_tag()
        self.upload_tarball()
        self.send_email()

if __name__ == '__main__':
    p = Project()
    parser = OptionParser()
    parser.add_option("-n", "--print-news", action="store_true",\
        dest="print_news", help="Generate and print news")
    parser.add_option("-p", "--print-notes", action="store_true",\
        dest="print_notes", help="Generate and print the release notes")
    parser.add_option("-w", "--write-news", action="store_true",\
        dest="write_news", help="Generate and write news into the NEWS file")
    parser.add_option("-r", "--release", action="store_true",\
        dest="release", help="Release the tarball")
    parser.add_option("-e", "--email", action="store_true",\
        dest="email", help="Send the release announce email")

    (options, args) = parser.parse_args ()
    if (options.print_news):
        print p.generate_news ()
    if (options.print_notes):
        print p.get_release_notes ()
    if (options.write_news):
        p.write_news ()
    if (options.release):
        p.release ()
    if (options.email):
        p.send_email ()