Subversion integration with Slack

slack-svn-hook.py

#!/usr/bin/python
# Script for Subversion integration with Slack
#
# Uses slackweb module:
# https://github.com/satoshi03/slack-python-webhook

# 1. Save this file in /usr/bin as slack-svn-hook
# 2. Make it executable:
#    chmod +x /usr/bin/slack-svn-hook
# 3. Put this line at the end of file of your_svn_repo/hooks/post-commit:
#    slack-svn-hook $REPOS $REV
# 4. Edit this file set your token and params (example given is for Trac)
#
# Refs:
#   - https://slack.com/services/new/incoming-webhook
#   - https://gist.github.com/amree/8a12037a731bc4893d76
#   - https://github.com/chriseldredge/git-slack-hook/blob/master/git-slack-hook
#   - http://svnbook.red-bean.com
#   - https://api.slack.com/docs/attachments

# Get token from https://my.slack.com/services/new/incoming-webhook
HOOK_URL = 'https://hooks.slack.com/services/...'
# URL To Trac environment
TRAC_URL = 'https://trac.example.org'
# URL to Ticket system, use None to disable
ISSUE_URL = 'https://eventum.example.org/view.php?id=%(issue_id)s'
# URL to Jira, use None to disable
JIRA_URL = "https://jira.example.org/browse/%(issue_key)s"
# "#channel" or "@nick" to post to
CHANNEL = '@glen'
# Username to show in webook
USERNAME = 'SVN Commit'

import sys
import re
import subprocess
import slackweb

def svnlook(args, rev=None, repos=None):
    command = [ 'svnlook' ]
    command.append(args)
    if rev:
        command.append('-r %s' % rev)
    if repos:
        command.append(repos)

    p = subprocess.Popen(command, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    (out, err) = p.communicate(None)
    p.wait()
    if err:
        print >> sys.stderr, "%s: %s" % (sys.argv[0], err)
        sys.exit(1)
    return out.strip()

# process text for extra markup
def process_text(s):
    if ISSUE_URL:
        def repl(m):
            url = ISSUE_URL % m.groupdict()
            return "<%s|%s>" % (url, m.group(0))

        s = re.sub('(?i)(?:issue|bug) ?:? ?#?(?P<issue_id>\d+)', repl, s)

    if JIRA_URL:
        def repl(m):
            url = JIRA_URL % m.groupdict()
            return "<%s|%s>" % (url, m.group(0))

        s = re.sub("(?P<issue_key>[A-Z]+-\d+)", repl, s)

    def cs_repl(m):
        params = m.groupdict()
        params['url'] = TRAC_URL
        url = "%(url)s/changeset/%(rev)s" % params
        return "<%s|%s>" % (url, m.group(0))

    s = re.sub('[r\[](?P<rev>\d+)\]?', cs_repl, s)

    return s

if len(sys.argv) < 3:
    print "Usage: %s REPOS REV" % (sys.argv[0])
    sys.exit(1)

repos, rev = sys.argv[1:]
author = svnlook("author", rev=rev, repos=repos)
commit_msg = process_text(svnlook("log", rev=rev, repos=repos))

# fallback is used as Desktop Notification, keep it short
fallback = "r%s by %s: %s..." % (rev, author, commit_msg[0:24])
# value is rich formatted commit message
value = "<%s/changeset/%s|r%s> %s" % (TRAC_URL, rev, rev, commit_msg)

attachments = []
attachment = {
    "fallback": fallback,
    "color": "good",
    "fields": [
        { "title" : author, "value" : value },
    ],
}
attachments.append(attachment)

slack = slackweb.Slack(url=HOOK_URL)
slack.notify(attachments=attachments, channel=CHANNEL, username=USERNAME)