Create subticket and patch for new wikis

Create DNS and Wikimedia Messages patches for the new wikis

Most of the gerrit code is copied from library upgrader library:
https://gerrit.wikimedia.org/r/plugins/gitiles/labs/libraryupgrader

Bug: T253439

gerrit.py

@@ -1,18 +1,38 @@
-import requests
+"""
+Copyright (C) 2019 Kunal Mehta <legoktm@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
 import json
+import os
 import subprocess
 import tempfile
 import urllib
-import os
 from contextlib import contextmanager
 
+import requests
 
 with open('gerrit-creds.json', 'r') as f:
     creds = json.loads(f.read())
 
+
 def load_ssh_key():
     mixin = ShellMixin()
-    mixin.check_call(['ssh-add', '/home/amsa/Phabricator-maintenance-bot/private_key'])
+    dir_path = os.path.dirname(os.path.realpath(__file__))
+    mixin.check_call(
+        ['ssh-add', os.path.join(dir_path, 'private_key')])
+
 
 @contextmanager
 def cd(dirname):
@@ -23,22 +43,23 @@ def cd(dirname):
     finally:
         os.chdir(cwd)
 
+
 def gerrit_url(repo: str, user=None, ssh=False) -> str:
     if user is not None:
         prefix = user + '@'
     else:
         prefix = ''
     if ssh:
-        return f'ssh://{prefix}gerrit.wikimedia.org:29418/{repo}'
+        return 'ssh://{}gerrit.wikimedia.org:29418/{}'.format(prefix, repo)
     else:
-        return f'https://{prefix}gerrit.wikimedia.org/r/{repo}.git'
+        return 'https://{}gerrit.wikimedia.org/r/{}.git'.format(prefix, repo)
 
 
 class ShellMixin:
     def check_call(self, args: list, stdin='', env=None,
                    ignore_returncode=False) -> str:
         debug = self.log if hasattr(self, 'log') else print
-        debug('$ ' + ' '.join(args))
+        #debug('$ ' + ' '.join(args))
         res = subprocess.run(
             args,
             input=stdin.encode(),
@@ -46,10 +67,11 @@ class ShellMixin:
             stderr=subprocess.STDOUT,
             env=env
         )
-        debug(res.stdout.decode())
+        # debug(res.stdout.decode())
         if not ignore_returncode:
             res.check_returncode()
         return res.stdout.decode()
+
     def clone(self, repo):
         url = gerrit_url(repo, user=creds['name'])
         self.check_call(['git', 'clone', url, 'repo', '--depth=1'])
@@ -57,7 +79,8 @@ class ShellMixin:
         self.check_call(['git', 'config', 'user.name', creds['name']])
         self.check_call(['git', 'config', 'user.email', creds['email']])
         self.check_call(['git', 'submodule', 'update', '--init'])
-        self.check_call(['scp', '-p', '-P', '29418', creds['name'] + '@gerrit.wikimedia.org:hooks/commit-msg', '.git/hooks/'])
+        self.check_call(['scp', '-p', '-P', '29418', creds['name'] +
+                         '@gerrit.wikimedia.org:hooks/commit-msg', '.git/hooks/'])
 
     def build_push_command(self, options: dict) -> list:
         per = '%topic=new-wikis-patches'
@@ -72,6 +95,7 @@ class ShellMixin:
                 gerrit_url(options['repo'], creds['name'], ssh=True),
                 'HEAD:refs/for/master' + per]
 
+
 class GerritBot(ShellMixin):
     def __init__(self, name, commit_message):
         self.name = name
@@ -84,17 +108,17 @@ class GerritBot(ShellMixin):
                 self.changes()
                 self.commit()
 
-
     def changes(self):
         files = [
-            'i18n/wikimediainterwikisearchresults/en.json',
+            'i18n/wikimediaprojectnames/en.json',
-            'i18n/wikimediainterwikisearchresults/qqq.json'
+            'i18n/wikimediaprojectnames/qqq.json'
         ]
         for file_ in files:
             with open(file_, 'r') as f:
                 result = json.load(f)
             with open(file_, 'w') as f:
-                f.write(json.dumps(result, ensure_ascii=False, indent='\t', sort_keys=True))
+                f.write(json.dumps(result, ensure_ascii=False,
+                                   indent='\t', sort_keys=True))
 
     def commit(self):
         self.check_call(['git', 'add', '.'])
@@ -102,7 +126,11 @@ class GerritBot(ShellMixin):
             f.write(self.commit_message)
         self.check_call(['git', 'commit', '-F', '.git/COMMIT_EDITMSG'])
         load_ssh_key()
-        self.check_call(self.build_push_command({'hashtags': ['automated-wiki-creation'], 'repo': self.name}))
+        self.check_call(self.build_push_command(
+            {'hashtags': ['automated-wiki-creation'], 'repo': self.name}))
 
-gerritbot = GerritBot('mediawiki/extensions/WikimediaMessages', "Order entries by alphabetical order\n\nThis would make creating automated patches easier")
+
+if __name__ == "__main__":
+    gerritbot = GerritBot('mediawiki/extensions/WikimediaMessages',
+                          "Order entries by alphabetical order\n\nThis would make creating automated patches easier")
     gerritbot.run()

lib.py

@@ -1,6 +1,6 @@
 import json
-import time
 import sys
+import time
 
 import requests
 
@@ -71,6 +71,27 @@ class Client(object):
             }]
         })
 
+    def createSubtask(self, desc, project_phids, parent_phid, title):
+        self.post('maniphest.edit', {
+            'objectIdentifier': '',
+            'transactions': [{
+                'type': 'parent',
+                'value': parent_phid
+            },
+                {
+                'type': 'title',
+                'value': title
+            },
+                {
+                'type': 'description',
+                'value': desc,
+            },
+                {
+                'type': 'projects.add',
+                'value': project_phids
+            }]
+        })
+
     def taskDetails(self, phid):
         """Lookup details of a Maniphest task."""
         r = self.post('maniphest.query', {'phids': [phid]})
@@ -97,7 +118,8 @@ class Client(object):
         })
 
     def getTasksWithProject(self, project_phid, continue_=None, statuses=None):
-        r = self._getTasksWithProjectContinue(project_phid, continue_, statuses=statuses)
+        r = self._getTasksWithProjectContinue(
+            project_phid, continue_, statuses=statuses)
         cursor = r['cursor']
         for case in r['data']:
             if case['type'] != 'TASK':
@@ -133,3 +155,13 @@ class Client(object):
         }
         return self.post('maniphest.search', params)[
             'data'][0]['attachments']['columns']
+
+    def getTaskSubtasks(self, phid):
+        params = {
+            "constraints": {
+                "phids": [phid],
+                "hasSubtasks": True
+            }
+        }
+        return self.post('maniphest.search', params)[
+            'data']

new_wikis_handler.py

@@ -6,6 +6,7 @@ import socket
 import requests
 
 from lib import Client
+from patch_makers import DnsPatchMaker, WikimediaMessagesPatchMaker
 
 final_text = ''
 gerrit_path = 'https://gerrit.wikimedia.org/g/'
@@ -17,6 +18,13 @@ def add_text(a):
     final_text += a + '\n'
 
 
+def add_checklist(url, text, checked):
+    if checked:
+        add_text(' [x] [[{}|{}]]'.format(url, text))
+    else:
+        add_text(' [] [[{}|{}]]'.format(url, text))
+
+
 def get_file_from_gerrit(path):
     gerrit_url = 'https://gerrit.wikimedia.org/g/'
     url = gerrit_url + '{0}?format=TEXT'.format(path)
@@ -34,8 +42,10 @@ def hostname_resolves(hostname):
         return False
     return True
 
+
 def handle_special_wiki_apache(parts):
-    apache_file = get_file_from_gerrit('operations/puppet/+/production/modules/mediawiki/manifests/web/prod_sites.pp')
+    apache_file = get_file_from_gerrit(
+        'operations/puppet/+/production/modules/mediawiki/manifests/web/prod_sites.pp')
     url = '.'.join(parts)
     return url in apache_file
 
@@ -46,24 +56,16 @@ def post_a_comment(comment):
     pass
 
 
-def create_subticket(text, projects, task_phid):
+def handle_subticket_for_cloud(task_details, db_name):
-    pass
+    hasSubtasks = client.getTaskSubtasks(task_details['phid'])
+    if hasSubtasks:
+        return
 
+    client.createSubtask('The new wiki is going to be **public**.', [
+        'PHID-PROJ-hwibeuyzizzy4xzunfsk',  # DBA
+        'PHID-PROJ-bj6y6ks7ampcwcignhce'  # Data services
+    ], task_details['phid'], 'Prepare and check storage layer for ' + db_name)
 
-def create_non_special_wikis_dns_subticket(parts, task_details):
-    pass
-
-
-def create_special_wikis_dns_subticket(parts, task_details):
-    pass
-
-
-def handle_subticket_for_cloud(ticket_phid, task_details, db_name):
-    pass
-
-
-def create_apache_config_subticket(parts, task_details):
-    pass
 
 def get_dummy_wiki(shard, family):
     if family == "wiktionary":
@@ -78,27 +80,52 @@ def get_dummy_wiki(shard, family):
         }.get(shard, "?????")
 
 
+def create_patch_for_wikimedia_messages(db_name, english_name, url, lang, bug_id):
+    if not english_name:
+        return
+    r = requests.get(
+        'https://gerrit.wikimedia.org/r/changes/?q=bug:{}+project:mediawiki/extensions/WikimediaMessages'.format(bug_id))
+    b = json.loads('\n'.join(r.text.split('\n')[1:]))
+    if b:
+        return
+    maker = WikimediaMessagesPatchMaker(
+        db_name, english_name, url, lang, bug_id)
+    maker.run()
+
+
+def create_patch_for_dns(lang, bug_id):
+    r = requests.get(
+        'https://gerrit.wikimedia.org/r/changes/?q=bug:{}+project:operations/dns'.format(bug_id))
+    b = json.loads('\n'.join(r.text.split('\n')[1:]))
+    if b:
+        return
+    maker = DnsPatchMaker(lang, bug_id)
+    maker.run()
+
+
 def hande_task(phid):
     global final_text
     final_text = ''
     task_details = client.taskDetails(phid)
     print('Checking T%s' % task_details['id'])
+    task_tid = 'T' + task_details['id']
     add_text('\n\n------\n**Pre-install automatic checklist:**')
-    language_code = re.findall(r'\n- *?\*\*Language code:\*\* *?(\S+)', task_details['description'])
+    wiki_spec = {}
+    for case in re.findall(r'\n- *?\*\*(.+?):\*\* *?(.+)', task_details['description']):
+        wiki_spec[case[0].strip()] = case[1].strip()
+    language_code = wiki_spec.get('Language code')
     if not language_code:
         print('lang code not found, skipping')
         return
-    language_code = language_code[0]
+    url = wiki_spec.get('Site URL')
-    url = re.findall(r'\n- *?\*\*Site URL:\*\* *?(\S+)', task_details['description'])
     if not url:
         print('url not found, skipping')
         return
-    url = url[0]
     parts = url.split('.')
     if len(parts) != 3 or parts[2] != 'org':
         print('the url looks weird, skipping')
         return
-    shard = re.findall(r'\n- *?\*\*Shard:\*\* *?(\S+)', task_details['description'])[0]
+    shard = wiki_spec.get('Shard', 'TBD')
 
     shardDecided = shard != "TBD"
     if shardDecided:
@@ -107,36 +134,31 @@ def hande_task(phid):
         add_text(' [] #DBA decided about the shard')
 
     special = parts[1] == 'wikimedia'
-    dns_url = gerrit_path + 'operations/dns/+/master/templates/wikimedia.org' if special else gerrit_path + 'operations/dns/+/master/templates/helpers/langlist.tmpl'
+    dns_url = gerrit_path + 'operations/dns/+/master/templates/wikimedia.org' if special else gerrit_path + \
+        'operations/dns/+/master/templates/helpers/langlist.tmpl'
 
     dns = hostname_resolves(url)
     if not dns:
-        add_text(' [] [[{}|DNS]]'.format(dns_url))
+        if not special:
-        if special:
+            create_patch_for_dns(language_code, task_tid)
-            create_special_wikis_dns_subticket(parts, task_details)
+    add_checklist(dns_url, 'DNS', dns)
-        else:
-            create_non_special_wikis_dns_subticket(parts, task_details)
-        post_a_comment('It seems that there is not DNS entry for this wiki, '
-                       'I am creaing a subticket, Please make a patch.')
-    else:
-        add_text(' [x] [[{}|DNS]]'.format(dns_url))
 
     if parts[1] == 'wikipedia':
         db_name = parts[0].replace('-', '_') + 'wiki'
     else:
         db_name = parts[0].replace('-', '_') + parts[1]
 
-    handle_subticket_for_cloud(client.lookupPhid('T251371'), task_details, db_name)
+    if not special and wiki_spec.get('Special', '').lower() != 'yes':
+        handle_subticket_for_cloud(task_details, db_name)
 
     if special:
-        apache_url = gerrit_path + 'operations/puppet/+/master/modules/mediawiki/manifests/web/prod_sites.pp'
+        apache_url = gerrit_path + \
+            'operations/puppet/+/master/modules/mediawiki/manifests/web/prod_sites.pp'
         if not handle_special_wiki_apache(parts):
             apache = False
-            add_text(' [] [[{}|Apache config]]'.format(apache_url))
-            create_apache_config_subticket(parts, task_details)
         else:
             apache = True
-            add_text(' [x] [[{}|Apache config]]'.format(apache_url))
+        add_checklist(apache_url, 'Apache config', apache)
     else:
         apache = True
         add_text(' [x] Apache config (Not needed)')
@@ -145,10 +167,12 @@ def hande_task(phid):
     r = requests.get(langdb_url)
     if re.search(r'\n *?' + language_code + ':', r.text):
         langdb = True
-        add_text(' [x] [[{}|Language configuration in language data repo]]'.format(langdb_url))
+        add_text(
+            ' [x] [[{}|Language configuration in language data repo]]'.format(langdb_url))
     else:
         langdb = False
-        add_text(' [] [[{}|Language configuration in language data repo]]'.format(langdb_url))
+        add_text(
+            ' [] [[{}|Language configuration in language data repo]]'.format(langdb_url))
 
     core_messages_url = 'https://raw.githubusercontent.com/wikimedia/mediawiki/master/languages/messages/Messages{}.php'.format(
         language_code[0].upper() + language_code[1:]
@@ -156,19 +180,23 @@ def hande_task(phid):
     r = requests.get(core_messages_url)
     if r.status_code == 200:
         core_lang = True
-        add_text(' [x] [[{}|Language configuration in mediawiki core]]'.format(core_messages_url))
     else:
         core_lang = False
-        add_text(' [] [[{}|Language configuration in mediawiki core]]'.format(core_messages_url))
+    add_checklist(core_messages_url,
+                  'Language configuration in mediawiki core', core_lang)
+
     path = 'mediawiki/extensions/WikimediaMessages/+/master/i18n/wikimediaprojectnames/en.json'
     wikimedia_messages_data = get_file_from_gerrit(path)
     wikimedia_messages_data = json.loads(wikimedia_messages_data)
     if 'project-localized-name-' + db_name in wikimedia_messages_data:
         wikimedia_messages_one = True
-        add_text(' [x] [[{}|Wikimedia messages configuration]]'.format(gerrit_path + path))
     else:
         wikimedia_messages_one = False
-        add_text(' [] [[{}|Wikimedia messages configuration]]'.format(gerrit_path + path))
+        english_name = wiki_spec.get('Project name (English)')
+        create_patch_for_wikimedia_messages(
+            db_name, english_name, url, language_code, task_tid)
+    add_checklist(gerrit_path + path,
+                  'Wikimedia messages configuration', wikimedia_messages_one)
     url = 'https://en.wikipedia.org/wiki/MediaWiki:Project-localized-name-' + db_name
     r = requests.get(url)
     if 'Wikipedia does not have a' not in r.text:
@@ -184,11 +212,10 @@ def hande_task(phid):
         search_messages_data = json.loads(search_messages_data)
         if 'search-interwiki-results-' + db_name in search_messages_data:
             wikimedia_messages_two = True
-            add_text(
-                ' [x] [[{}|Wikimedia messages (interwiki search result) configuration]]'.format(gerrit_path + path))
         else:
             wikimedia_messages_two = False
-            add_text(' [] [[{}|Wikimedia messages (interwiki search result) configuration]]'.format(gerrit_path + path))
+        add_checklist(gerrit_path + path,
+                      'Wikimedia messages (interwiki search result) configuration', wikimedia_messages_two)
         url = 'https://en.wikipedia.org/wiki/MediaWiki:Search-interwiki-results-' + db_name
         r = requests.get(url)
         if 'Wikipedia does not have a' not in r.text:
@@ -200,7 +227,8 @@ def hande_task(phid):
     else:
         wikimedia_messages_two = True
         wikimedia_messages_two_deployed = True
-        add_text(' [x] Wikimedia messages (interwiki search result) configuration (not needed)')
+        add_text(
+            ' [x] Wikimedia messages (interwiki search result) configuration (not needed)')
 
     if dns and apache and langdb and core_lang and wikimedia_messages_one and wikimedia_messages_one_deployed and wikimedia_messages_two and wikimedia_messages_two_deployed and shardDecided:
         add_text('**The Wiki is ready to be created.**')
@@ -211,37 +239,27 @@ def hande_task(phid):
 
     path = 'mediawiki/services/restbase/deploy/+/master/scap/vars.yaml'
     restbase = get_file_from_gerrit(path)
-    if '.'.join(parts) in restbase:
+    add_checklist(gerrit_path + path, 'RESTbase', '.'.join(parts) in restbase)
-        add_text(' [x] [[{}|RESTbase]]'.format(gerrit_path + path))
+
-    else:
-        add_text(' [] [[{}|RESTbase]]'.format(gerrit_path + path))
     path = 'mediawiki/services/cxserver/+/master/config/languages.yaml'
     cxconfig = get_file_from_gerrit(path)
-    if '\n- ' + language_code in cxconfig:
+    add_checklist(gerrit_path + path, 'CX Config',
-        add_text(' [x] [[{}|CX Config]]'.format(gerrit_path + path))
+                  '\n- ' + language_code in cxconfig)
-    else:
-        add_text(' [] [[{}|CX Config]]'.format(gerrit_path + path))
 
     path = 'analytics/refinery/+/master/static_data/pageview/whitelist/whitelist.tsv'
     refinery_whitelist = get_file_from_gerrit(path)
-    if '.'.join(parts[:2]) in refinery_whitelist:
+    add_checklist(gerrit_path + path, 'Analytics refinery',
-        add_text(' [x] [[{}|Analytics refinery]]'.format(gerrit_path + path))
+                  '.'.join(parts[:2]) in refinery_whitelist)
-    else:
-        add_text(' [] [[{}|Analytics refinery]]'.format(gerrit_path + path))
 
-    url = 'pywikibot/core/+/master/pywikibot/families/{}_family.py'.format(parts[1])
+    url = 'pywikibot/core/+/master/pywikibot/families/{}_family.py'.format(
+        parts[1])
     pywikibot = get_file_from_gerrit(url)
-    if "'{}'".format(language_code) in pywikibot:
+    add_checklist(gerrit_path + url, 'Pywikibot',
-        add_text(' [x] [[{}|Pywikibot]]'.format(gerrit_path + url))
+                  "'{}'".format(language_code) in pywikibot)
-    else:
-        add_text(' [] [[{}|Pywikibot]]'.format(gerrit_path + url))
 
     url = 'https://www.wikidata.org/w/api.php?action=help&modules=wbgetentities'
     wikiata_help_page = requests.get(url).text
-    if db_name in wikiata_help_page:
+    add_checklist(url, 'Wikidata', db_name in wikiata_help_page)
-        add_text(' [x] [[{}|Wikidata]]'.format(url))
-    else:
-        add_text(' [] [[{}|Wikidata]]'.format(url))
 
     add_text(' [] Import from Incubator')
     add_text(' [] Clean up old interwiki links')
@@ -256,9 +274,11 @@ def hande_task(phid):
     add_text('On mwmaint1002:')
     add_text('`scap pull`')
     add_text('`mwscript extensions/WikimediaMaintenance/addWiki.php --wiki={dummy} {lang} {family} {db} {url}`'.format(
-        dummy=dummy_wiki, lang=language_code, family=parts[1], db=db_name, url='.'.join(parts)
+        dummy=dummy_wiki, lang=language_code, family=parts[1], db=db_name, url='.'.join(
+            parts)
     ))
-    summary = 'Creating {db_name} ({phab})'.format(db_name=db_name, phab='T' + task_details['id'])
+    summary = 'Creating {db_name} ({phab})'.format(
+        db_name=db_name, phab=task_tid)
     add_text('On deploy1001:')
     if shard != "s3":
         add_text('`scap sync-file wmf-config/db-eqiad.php "{}"`'.format(summary))
@@ -266,7 +286,8 @@ def hande_task(phid):
     add_text('`scap sync-file dblists "{}"`'.format(summary))
     add_text('`scap sync-wikiversions "{}"`'.format(summary))
     if parts[1] == 'wikimedia':
-        add_text('`scap sync-file multiversion/MWMultiVersion.php "{}"`'.format(summary))
+        add_text(
+            '`scap sync-file multiversion/MWMultiVersion.php "{}"`'.format(summary))
     add_text('`scap sync-file static/images/project-logos/ "{}"`'.format(summary))
     add_text('`scap sync-file wmf-config/InitialiseSettings.php "{}"`'.format(summary))
     if parts[1] != 'wikimedia':
@@ -278,7 +299,8 @@ def hande_task(phid):
         task_details['description'], re.DOTALL)
     if not old_report:
         print('old report not found, appending')
-        client.setTaskDescription(task_details['phid'], task_details['description'] + final_text)
+        client.setTaskDescription(
+            task_details['phid'], task_details['description'] + final_text)
     else:
         if old_report[0] != final_text:
             print('Updating old report')

patch_makers.py

@@ -0,0 +1,82 @@
+import json
+
+from gerrit import GerritBot
+
+
+class WikimediaMessagesPatchMaker(GerritBot):
+    def __init__(self, db_name, english_name, url, lang, bug_id):
+        self.db_name = db_name
+        self.english_name = english_name
+        self.wiki_url = url
+        self.wiki_lang = lang
+        super().__init__(
+            'mediawiki/extensions/WikimediaMessages',
+            'Add messages for {} ({})\n\nBug:{}'.format(
+                english_name, db_name, bug_id)
+        )
+
+    def changes(self):
+        file_ = 'i18n/wikimediaprojectnames/en.json'
+        result = self._read_json(file_)
+        result['project-localized-name-' + self.db_name] = self.english_name
+        self._write_json(file_, result)
+
+        file_ = 'i18n/wikimediaprojectnames/qqq.json'
+        result = self._read_json(file_)
+        result['project-localized-name-' + self.db_name] = '{{ProjectNameDocumentation|url=' + \
+            self.wiki_url + '|name=' + self.english_name + \
+            '|language=' + self.wiki_lang + '}}'
+        self._write_json(file_, result)
+
+        if not 'wikipedia' in self.wiki_url:
+            return
+
+        file_ = 'i18n/wikimediainterwikisearchresults/en.json'
+        result = self._read_json(file_)
+        result['search-interwiki-results-' +
+               self.db_name] = 'Showing results from [[:{}:|{}]].'.format(self.wiki_lang, self.english_name)
+        self._write_json(file_, result)
+
+        file_ = 'i18n/wikimediainterwikisearchresults/qqq.json'
+        result = self._read_json(file_)
+        result['search-interwiki-results-' + self.db_name] = 'Search results description for ' + \
+            self.english_name + '.\n{{LanguageNameTip|' + self.wiki_lang + '}}'
+        self._write_json(file_, result)
+
+    def _read_json(self, path):
+        with open(path, 'r') as f:
+            result = json.load(f)
+        return result
+
+    def _write_json(self, path, content):
+        with open(path, 'w') as f:
+            f.write(json.dumps(content, ensure_ascii=False,
+                               indent='\t', sort_keys=True))
+
+
+def DnsPatchMaker():
+    def __init__(self, lang, bug_id):
+        self.wiki_lang = lang
+        super().__init__(
+            'operations/dns',
+            'Add {} to langlist helper\n\nBug:{}'.format(lang, bug_id)
+        )
+
+    def changes(self):
+        with open('templates/helpers/langlist.tmpl', 'r') as f:
+            lines = f.read().split('\n')
+        header = []
+        langs = []
+        footer = []
+        for line in lines:
+            if not line.startswith(' '):
+                if not header:
+                    header.append(line)
+                else:
+                    footer.append(line)
+            else:
+                langs.append(line)
+        langs.append("        '{}',".format(self.wiki_lang))
+        langs.sort()
+        with open('templates/helpers/langlist.tmpl', 'w') as f:
+            f.write('\n'.join(footer) + '\n'.join(langs) + '\n'.join(footer))