#!/usr/bin/env python

import os
import re
import urllib
import csv
import datetime
from string import Template

username = 'xclaesse'
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)
	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 = "GNOME SVN"
		i = s.find(s1)
		s1 = "href"
		i = s.find(s1, 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_last_tag(self):
		tags_str = self.exec_cmd('git-tag')
		tags = tags_str.splitlines()

		return tags[len(tags)-1]

	def parse_commit(self, ref, author, date, message):
		p1 = message.rfind('(')
		p2 = message.rfind (')')
		if len(message) - p2 <= 2:
			author = message[p1+1:p2]
			message = message[:p1]

		msg = message.lower()
		if msg.find('translation') != -1 and\
		   msg.find('updated') != -1:
			self.translations += ' - ' + message + ' (' + author + ').\n' 
		elif message.find('#') != -1:
			p1 = message.find('#')
			while p1 != -1:
				bug = Bug()
				p2 = message.find(' ', p1)
				bug.number = message[p1+1:p2]
				bug.author = author
				self.bug_commits.append(bug)
				p1 = message.find('#', p2)
		else:
			self.commits += ' - ' + message + ' (' + author + ').\n'

	def query_bug_commits(self):
		bugs = ''
		for bug in self.bug_commits:
			bugs += bug.number + ','

		# Bugzilla query to use
		query = 'http://bugzilla.gnome.org/buglist.cgi?ctype=csv' \
			'&bug_status=RESOLVED,CLOSED,VERIFIED' \
			'&resolution=FIXED' \
			'&bug_id=' + bugs.replace(',', '%2c')

		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

		for row in reader:
			bug_number = row[col_bug_id]
			description = row[col_description]

			for bug in self.bug_commits:
				if bug.number == bug_number:
					self.bugs += ' - Fixed #%s, %s (%s)\n' % (bug.number, description, bug.author)
					break

	def get_commits(self):
		self.commits = ''
		self.translations = ''
		self.bugs = ''
		self.bug_commits = []
		last_tag = self.get_last_tag()
		ref = None

		changes = self.exec_cmd ("git-log " + last_tag + "..")
        	for line in changes.splitlines(1):
        		if line.startswith('commit'):
				if ref != None:
					self.parse_commit (ref, author, date, message)
				p1 = line.find(' ')
				ref = line[p1:].strip()
				author = ''
				date = ''
				message = ''
        		elif line.startswith('Author:'):
        			p1 = line.find(' ')
        			p2 = line.find('<')
        			author = line[p1:p2].strip()
        		elif line.startswith('Date:'):
        			p1 = line.find(' ')
        			date = line[p1:].strip()
        		elif line.startswith('    git-svn-id:'):
        			continue
        		elif line.startswith('Merge:'):
        			continue
        		else:
				msg = line.strip()
				if msg == '':
					continue
				if message != '':
					message += '\n'
				message += msg

		self.query_bug_commits ()

	def make_tag(self):
		new_tag = self.package_name.upper() + '_' +\
			  self.package_version.replace('.', '_')

		url1 = self.exec_cmd('git-config svn-remote.svn.url').strip()
		url2 = url1[:url1.rfind('/')] + '/tags/' + new_tag
		self.exec_cmd('svn copy %s %s -m "Tagged for release %s."' % (url1, url2, self.package_version))

		self.exec_cmd('git-tag -m "Tagged for release %s." %s' % ( self.package_version, new_tag))

	def generate_news(self):
		self.get_commits()
		news = 'NEW in '+ self.package_version + '\n==============\n' 
		news += self.commits + '\nBugs fixed:\n' + self.bugs + '\nTranslations:\n' + self.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 upload_tarball(self):
		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 release(self):
		self.make_tag()
		self.upload_tarball()
		print self.get_release_notes()

p = Project()
#print p.generate_news()
#p.write_news()
#p.release()