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#!/usr/bin/env python
# Copyright (C) 2009 Sebastian Pipping <sebastian@pipping.org>
# Licensed under GPL 2 or later

import sys
import os
if len(sys.argv) not in (3, 4):
    print "USAGE:\n  python  %s  foo/gitosis.conf bar/repositories.xml [baz/extended.xml]" % \
            os.path.basename(sys.argv[0])
    sys.exit(1)
gitosis_conf_location = sys.argv[1]
repositories_xml_location = sys.argv[2]
extended_xml_location = (len(sys.argv) == 4) and sys.argv[3] or None


import xml.etree.ElementTree as ET
from ConfigParser import ConfigParser
import re

from sharedutils import * # local


def sort_as_in(elements, tag_order):
    order_map = dict((v, i) for i, v in enumerate(tag_order))
    deco = (t for t in enumerate(elements))
    deco_sorted = sorted(deco, key=lambda (i, v): (order_map[v.tag], i))
    return list(v for _, v in deco_sorted)

class ChangeLog:
    def __init__(self, repo_name, is_new):
        self.empty = True
        self.repo_name = repo_name
        self.is_new = is_new

    def log(self, kind, details):
        if self.empty:
            if self.is_new:
                print 'Repo "%s" missing completely' % self.repo_name
            else:
                print 'Analyzing repo "%s":' % self.repo_name
            self.empty = False

        if not self.is_new:
            print '- Missing %s "%s"' % (kind, details)


OWNER_REGEX = re.compile('^([^<]+) (?:\([^)]+\) )?<([^ ]+@[^ ]+)>$')
NOT_AN_OVERLAY_MESSAGE = 'Skipping %s (not an overlay)'


gitosis_conf = ConfigParser()
gitosis_conf.read(gitosis_conf_location)

a = ET.parse(open(repositories_xml_location))
repositories = a.getroot()
overlays_gentoo_org_dict = dict([[e.find('name').text, e] for e in repositories])

for section_name in gitosis_conf.sections():
    if section_name.startswith('repo '):
        _repo_base = section_name[len('repo '):].strip()
        if _repo_base.startswith('dev/'):
            repo_name = _repo_base[len('dev/'):].strip()
            owner_type = "person"
        elif _repo_base.startswith('proj/'):
            repo_name = _repo_base[len('proj/'):].strip()
            owner_type = "project"
        else:
            # TODO print NOT_AN_OVERLAY_MESSAGE % repo_name
            continue

        _description = gitosis_conf.get(section_name, 'description')
        if not gitosis_conf.has_option(section_name, 'gentoo-is-overlay') or \
                not gitosis_conf.getboolean(section_name, 'gentoo-is-overlay'):
            if not _description.lower().endswith('overlay'):
                # TODO print NOT_AN_OVERLAY_MESSAGE % repo_name
                continue

        if gitosis_conf.has_option(section_name, 'gitweb') and \
            not gitosis_conf.getboolean(section_name, 'gitweb'):
                # TODO print 'Skipping %s (not public)' % repo_name
                continue

        is_new = repo_name not in overlays_gentoo_org_dict
        if is_new:
            repo = ET.Element('repo')
            repositories.append(repo)
            name = ET.Element('name')
            name.text = repo_name
            repo.append(name)
        else:
            repo = overlays_gentoo_org_dict[repo_name]
        log = ChangeLog(repo_name, is_new)

        if 'status' not in repo.attrib:
            repo.attrib['status'] = 'official'
            log.log('attribute', 'status')

        if 'quality' not in repo.attrib:
            repo.attrib['quality'] = 'experiental'
            log.log('attribute', 'quality')

        homepage = repo.find('homepage')
        if homepage == None:
            homepage = ET.Element('homepage')
            homepage.text = 'http://git.overlays.gentoo.org/gitweb/?p=%s.git;a=summary' % _repo_base
            repo.append(homepage)
            log.log('homepage', homepage.text)

        description = repo.find('description')
        if description == None:
            description = ET.Element('description', lang='en')
            description.text = _description
            repo.append(description)
            log.log('description', _description)


        _owner = gitosis_conf.get(section_name, 'owner')
        _owner_match = OWNER_REGEX.match(_owner)

        owner = repo.find('owner')
        if owner == None:
            owner = ET.Element('owner', type=owner_type)
            repo.append(owner)
            log.log('owner', 'TODO')

        owner_name = owner.find('name')
        if owner_name == None:
            owner_name = ET.Element('name')
            owner_name.text = _owner_match.group(1)
            log.log('owner name', owner_name.text)

        owner_email = owner.find('email')
        if owner_email == None:
            owner_email = ET.Element('email')
            owner_email.text = _owner_match.group(2)
            log.log('owner email', owner_email.text)

        owner[:] = [owner_email, owner_name]


        _sources = set((source.attrib['type'], source.text) for source in repo.findall('source'))
        source_uris = (
            'git://git.overlays.gentoo.org/%s.git' % _repo_base,
            'http://git.overlays.gentoo.org/gitroot/%s.git' % _repo_base,
            'git+ssh://git@git.overlays.gentoo.org/%s.git' % _repo_base,
        )
        for uri in source_uris:
            if ('git', uri) not in _sources and \
                    ('git', uri[:-len('.git')]) not in _sources:
                source = ET.Element('source', type='git')
                source.text = uri
                repo.append(source)
                log.log('git source', uri)


        _feeds = set(feed.text for feed in repo.findall('feed'))
        feed_uris = (
            'http://git.overlays.gentoo.org/gitweb/?p=%s.git;a=atom' % _repo_base,
            'http://git.overlays.gentoo.org/gitweb/?p=%s.git;a=rss' % _repo_base,
        )
        for uri in feed_uris:
            if uri not in _feeds:
                feed = ET.Element('feed')
                feed.text = uri
                repo.append(feed)
                log.log('feed', uri)

        repo[:] = sort_as_in(repo[:], (
                'name', 'description', 'longdescription',
                'homepage', 'owner', 'source', 'feed'))

        if is_new or not log.empty:
            if extended_xml_location == None:
                TERM_WIDTH = 67
                print '-'*TERM_WIDTH
                sys.stdout.write('  ')
                indent(repo, 1)
                repo.tail = '\n'
                ET.ElementTree(repo).write(sys.stdout)
                print '-'*TERM_WIDTH
            print


if extended_xml_location != None:
    indent(repositories)
    a.write(extended_xml_location)