git-commit-vandalism/templates/hooks--update

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#!/bin/sh
#
# An example hook script to mail out commit update information.
# It also blocks tags that aren't annotated.
# Called by git-receive-pack with arguments: refname sha1-old sha1-new
#
# To enable this hook:
# (1) change the recipient e-mail address
# (2) make this file executable by "chmod +x update".
#
project=$(cat $GIT_DIR/description)
recipients="commit-list@somewhere.com commit-list@somewhereelse.com"
ref_type=$(git cat-file -t "$3")
# Only allow annotated tags in a shared repo
# Remove this code to treat dumb tags the same as everything else
case "$1","$ref_type" in
refs/tags/*,commit)
echo "*** Un-annotated tags are not allowed in this repo" >&2
echo "*** Use 'git tag [ -a | -s ]' for tags you want to propagate."
exit 1;;
refs/tags/*,tag)
echo "### Pushing version '${1##refs/tags/}' to the masses" >&2
# recipients="release-announce@somwehere.com announce@somewhereelse.com"
;;
esac
# set this to 'cat' to get a very detailed listing.
# short only kicks in when an annotated tag is added
short='git shortlog'
# see 'date --help' for info on how to write this
# The default is a human-readable iso8601-like format with minute
# precision ('2006-01-25 15:58 +0100' for example)
date_format="%F %R %z"
(if expr "$2" : '0*$' >/dev/null
then
# new ref
case "$1" in
refs/tags/*)
# a pushed and annotated tag (usually) means a new version
tag="${1##refs/tags/}"
if [ "$ref_type" = tag ]; then
eval $(git cat-file tag $3 | \
sed -n '4s/tagger \([^>]*>\)[^0-9]*\([0-9]*\).*/tagger="\1" ts="\2"/p')
date=$(date --date="1970-01-01 00:00:00 $ts seconds" +"$date_format")
echo "Tag '$tag' created by $tagger at $date"
git cat-file tag $3 | sed -n '5,$p'
echo
fi
prev=$(git describe "$3^" | sed 's/-g.*//')
# the first tag in a repo will yield no $prev
if [ -z "$prev" ]; then
echo "Changes since the dawn of time:"
git rev-list --pretty $3 | $short
else
echo "Changes since $prev:"
git rev-list --pretty $prev..$3 | $short
echo ---
git diff $prev..$3 | diffstat -p1
echo ---
fi
;;
refs/heads/*)
branch="${1##refs/heads/}"
echo "New branch '$branch' available with the following commits:"
git-rev-list --pretty "$3"
;;
esac
else
base=$(git-merge-base "$2" "$3")
case "$base" in
"$2")
git diff "$3" "^$base" | diffstat -p1
echo
echo "New commits:"
;;
*)
echo "Rebased ref, commits from common ancestor:"
;;
esac
git-rev-list --pretty "$3" "^$base"
fi) |
mail -s "$project: Changes to '${1##refs/heads/}'" $recipients
exit 0