mod_hg.py

'''
	Copyright 2014-2015 Teemu Piippo
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	3. The name of the author may not be used to endorse or promote products
	   derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'''

from hgapi import hgapi, Repo
from datetime import datetime
import hgpoll as HgPoll
import re
import bt as Bt
from configfile import Config
from modulecore import command_error

ModuleData = {
	'commands':
	[
		{
			'name': 'checkhg',
			'description': 'Polls the zandronum repositories for updates',
			'args': None,
			'level': 'admin',
		},

		{
			'name': 'cset',
			'description': 'Yields changeset information (use a hash or date as key)',
			'args': '<key>',
			'level': 'normal',
		},

		{
			'name': 'hg',
			'description': 'Executes a hg command',
			'args': '<repo> <command...>',
			'level': 'admin',
		},

		{
			'name': 'resolves',
			'description': '''Manually cause a ticket to be resolved by a changeset''',
			'args': '<ticket> <changeset>',
			'level': 'admin', # TODO
		},

		{
			'name': 'rebuildcommitsdb',
			'description': '''Rebuilds commits.db''',
			'args': None,
			'level': 'admin',
		},
	]
}

def plural (a):
	return '' if a == 1 else 's'

def cmd_checkhg (bot, **rest):
	HgPoll.force_poll()

def is_dateversion (key):
	try:
		datetime.strptime (key, '%y%m%d-%H%M')
		return True
	except ValueError:
		return False

def resolve_node (node):
	reponame = None

	if '/' in node:
		reponame, node = node.split ('/')[0:2]
		
		if reponame not in HgPoll.all_repo_names():
			command_error ('''unknown repository %s''' % reponame)

	# Possibly we're passed a date version instead. Try find the node for this.
	if is_dateversion (node):
		node = HgPoll.g_CommitsDb.find_commit_by_dateversion (node)

		if node == None:
			command_error ('''couldn't find changeset for date %s''' % node)
			return

		node = node[0:7]

	noderepos = HgPoll.g_CommitsDb.get_commit_repos (node)

	if reponame == None:
		if not noderepos:
			command_error ('''couldn't find changeset %s''' % node)

		reponame = noderepos[0]

	return (node, reponame)

def cmd_cset (bot, args, reply, **rest):
	data = ""
	node, reponame = resolve_node (args['key'])
	repourl = HgPoll.get_repo_info (reponame).get_value ('url')
	repo = Repo (reponame)
	delim = '@@@@@@@@@@@@'

	try:
		data = repo.hg_command ("log", "-l1", "-r", node, "--template",
			delim.join (["{node|short}",
			"{desc}",
			"{author}",
			"{diffstat}",
			"{date|hgdate}",
			"{bookmarks}",
			"{latesttagdistance}",
			"{latesttag}"])).split (delim)
	except hgapi.HgException:
		command_error ('''couldn't find changeset %s in %s''' % (node, reponame))
		return

	try:
		node = data[0]
		message = data[1]
		author = data[2]
		diffstat = data[3]
		date = datetime.utcfromtimestamp (int (data[4].split (' ')[0]))
		bookmarks = data[5]
		latesttagdistance = int (data[6])
		latesttag = data[7]
		delta = datetime.utcnow() - date
		datestring = ''

		if bookmarks:
			bookmarks = HgPoll.prettify_bookmarks (bookmarks)

		# Find out the Zandronum version of this changeset
		repo.hg_command ('revert', '-r', node, 'src/version.h')
		zanversion = '<unknown version>'

		try:
			with open (reponame + '/src/version.h') as version_file:
				regexps = [ \
					re.compile (r'#define\s+GAMEVER_STRING\s+"([^"]+)"'), \
					re.compile (r'#define\s+DOTVERSIONSTR_NOREV\s+"([^"]+)"'), \
					re.compile (r'#define\s+DOTVERSIONSTR\s+"([^"]+)"')]

				for line in version_file:
					for rex in regexps:
						match = rex.match (line)
						if match != None:
							zanversion = match.group (1)
							break

					if match != None:
						break
		except IOError:
			pass

		repo.hg_command ('revert', '--all')

		# Remove the email address from the author if possible
		match = re.compile (r'^(.+) <([^>]+)>$.*').match (author)
		if match:
			author = match.group (1)
			email = match.group (2)

		username = Config.find_developer_by_email (email)

		if username != '':
			author = username

		# Try prettify the diffstat
		rex = re.compile (r'^([0-9]+): \+([0-9]+)/-([0-9]+)$')
		match = rex.match (diffstat)

		if match:
			diffstat = "%s\003:\0033 +%s\003/\0034-%s\003" % (match.group (1), match.group (2), match.group (3))

		if delta.days < 4:
			if delta.days == 0:
				if delta.seconds < 60:
					datestring = 'just now'
				elif delta.seconds < 3600:
					minutes = delta.seconds / 60
					datestring = '%d minute%s ago' % (minutes, plural (minutes))
				else:
					hours = delta.seconds / 3600
					datestring = '%d hour%s ago' % (hours, plural (hours))
			else:
				datestring = '%d day%s ago' % (delta.days, plural (delta.days))
		else:
			datestring = 'on %s' % (str (date))

		versionstring = ""
		if latesttagdistance != 0:
			versionstring = '%s %s, %d hops from %s' % (zanversion, date.strftime ('%y%m%d-%H%M'), latesttagdistance, latesttag)
		else:
			versionstring = latesttag

		reply ('changeset\0035 %s%s\003 (%s)\003: committed by\0032 %s\003 %s,\0032 %s' % \
			(node, bookmarks, versionstring, author, datestring, diffstat))

		for line in message.split ('\n'):
			reply ('    ' + line)

		reply ('url: %s/commits/%s' % (repourl, node))
	except hgapi.HgException as e:
		result = HgPoll.decipher_hgapi_error (e)

		if result[0]:
			command_error (result[1])
		else:
			command_error (`e`)

def cmd_hg (bot, args, reply, **rest):
	try:
		repo = hgapi.Repo (args['repo'])
		result = repo.hg_command (*args['command'])
		reply (result)
	except hgapi.hgapi.HgException as e:
		result = HgPoll.decipher_hgapi_error (e)

		if result[0]:
			command_error (result[1])
		else:
			command_error (`e`)

def cmd_resolves (bot, args, **rest):
	HgPoll.announce_ticket_resolved (args['ticket'], args['changeset'])

def cmd_rebuildcommitsdb (bot, args, **rest):
	HgPoll.g_CommitsDb.create_new()