Patrick's playground

Today I got annoyed with the silence in #gentoo-commits and spent a few hours fixing that. We have a bot reporting ... well, I hope all commits, but I haven't tested it enough.

So let me explain how it works so you can be very amused ...

First stage: Get notifications
Difficulty: I can't install postcommit hooks on cvs.gentoo.org
Workaround: gentoo-commits@lists.gentoo.org emails
Code (procmailrc):

:0:
* ^TO_gentoo-commits@lists.gentoo.org
{
  :0 c
  .maildir/.INBOX.gentoo-commits/

  :0
  | bash ~/irker-wrapper.sh
}

So this runs all mails that come from the ML through a script, and puts a copy into a subfolder.

Second stage: Extracting the data
Difficulty: Email is not a structured format
Workaround: bashing things with bash until happy
Code (irker-wrapper.sh):

#!/bin/bash
# irker wrapper helper thingy

while read line; do
        # echo $line # debug
        echo $line | grep -q "X-VCS-Repository:" && REPO=${line/X-VCS-Repository: /}
        echo $line | grep -q "X-VCS-Committer:"  && AUTHOR=${line/X-VCS-Committer:/}
        echo $line | grep -q "X-VCS-Directories:"  &&  DIRECTORIES=${line/X-VCS-Directories:/}
        echo $line | grep -q "Subject:"  && SUBJECT=${line/Subject:/}
        EVERYTHING+=$line
        EVERYTHING+="\n"
done

COMMIT_MSG=`echo -e $EVERYTHING | grep "Log:" -A1 | grep -v "Log:"`

ssh commitbot@lolcode.gentooexperimental.org "{\"to\": [\"irc://chat.freenode.net/#gentoo-commits\"], \"privmsg\": \"$REPO: ${AUTHOR} ${DIRECTORIES}: $COMMIT_MSG \"}"

Why the ssh stuff? Well, the server where the mails arrive is a bit restricted, hard to run a daemon there 'n stuff, so let's just pipe it somewhere more liberal

Third stage: Sending the notifications
Difficulty: How to communicate with irkerd?
Workaround: nc, a hammer, a few thumbs
Code:

#!/bin/bash

echo $@ | nc --send-only  127.0.0.1 6659

And that's how the magic works.

Bonus trick: using command="" in ~/.ssh/authorized_keys

... and now I really need a beer :)