gistfile1.txt

#!/bin/bash

# configuration
path=/tmp/aide
server='irc.freenode.net'
channel='#chakra-devel'

# file to append messages to
out="$path/$server/$channel/in"

# read input, extract branch&repo names 
read oldrev newrev ref
branch=${ref/refs\/heads\//}
repo=$(basename $(pwd)|sed 's/\.git$//') # feel free to hardcode it
url="http://git.chakraos.org/${repo}/"

# commits to consider
if [ "$oldrev" == '0000000000000000000000000000000000000000' ]
then
    # new branch!
    echo "New branch: $repo/$branch" >> $out
    # get all revisions specific to this branch
    commits="$(git for-each-ref --format='%(refname)' 'refs/heads/*' \ |grep -v "$ref"|sed 's/^/\^/') $newrev"
else
    # range of revisions
    commits="$oldrev..$newrev"
fi

# count number of commits
num=$(git rev-list $commits --count)
s=$([ "$num" != '1' ] && echo 's') # plural

# generate messages
echo "%a pushed $num commit$s to $repo/$branch - $url/shortlog/${oldrev}..$newrev"