#!/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".
#
-recipient="commit-list@mydomain.xz"
+project=$(cat $GIT_DIR/description)
+recipients="commit-list@somewhere.com commit-list@somewhereelse.com"
-if expr "$2" : '0*$' >/dev/null
+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
- echo "Created a new ref, with the following commits:"
- git-rev-list --pretty "$2"
+ # 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 --stat $prev..$3
+ echo ---
+ fi
+ ;;
+
+ refs/heads/*)
+ branch="${1##refs/heads/}"
+ echo "New branch '$branch' available with the following commits:"
+ git-rev-list --pretty "$3" $(git-rev-parse --not --all)
+ ;;
+ esac
else
- echo "New commits:"
- git-rev-list --pretty "$3" "^$2"
-fi |
-mail -s "Changes to ref $1" "$recipient"
+ base=$(git-merge-base "$2" "$3")
+ case "$base" in
+ "$2")
+ git diff --stat "$3" "^$base"
+ 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