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update-hook: Major overhaul (handling tags, mainly).
This is the update hook we use in all our git-repos. It has some improvements over the original version, namely: * Don't send every commit since dawn of time when adding a new tag. * When updating an annotated tag, just send the diffs since the last tag. * Add diffstat output for 'normal' commits (top) and annotated tags (bottom). * Block un-annotated tags in shared repos. I'm a bit uncertain about that last one, but it demonstrates how to disallow updates of a ref which we use, so I kept it. Note that git-describe is needed for the "changes since last annotated tag" thing to work. Signed-off-by: Andreas Ericsson <ae@op5.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
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@ -1,6 +1,7 @@
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#!/bin/sh
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#
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# An example hook script to mail out commit update information.
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# It also blocks tags that aren't annotated.
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# Called by git-receive-pack with arguments: refname sha1-old sha1-new
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#
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# To enable this hook:
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# (2) make this file executable by "chmod +x update".
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#
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recipient="commit-list@example.com"
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project=$(cat $GIT_DIR/description)
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recipients="commit-list@somewhere.com commit-list@somewhereelse.com"
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if expr "$2" : '0*$' >/dev/null
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ref_type=$(git cat-file -t "$3")
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# Only allow annotated tags in a shared repo
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# Remove this code to treat dumb tags the same as everything else
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case "$1","$ref_type" in
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refs/tags/*,commit)
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echo "*** Un-annotated tags are not allowed in this repo" >&2
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echo "*** Use 'git tag [ -a | -s ]' for tags you want to propagate."
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exit 1;;
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refs/tags/*,tag)
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echo "### Pushing version '${1##refs/tags/}' to the masses" >&2
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# recipients="release-announce@somwehere.com announce@somewhereelse.com"
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;;
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esac
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# set this to 'cat' to get a very detailed listing.
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# short only kicks in when an annotated tag is added
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short='git shortlog'
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# see 'date --help' for info on how to write this
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# The default is a human-readable iso8601-like format with minute
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# precision ('2006-01-25 15:58 +0100' for example)
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date_format="%F %R %z"
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(if expr "$2" : '0*$' >/dev/null
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then
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echo "Created a new ref, with the following commits:"
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git-rev-list --pretty "$3"
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# new ref
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case "$1" in
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refs/tags/*)
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# a pushed and annotated tag (usually) means a new version
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tag="${1##refs/tags/}"
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if [ "$ref_type" = tag ]; then
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eval $(git cat-file tag $3 | \
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sed -n '4s/tagger \([^>]*>\)[^0-9]*\([0-9]*\).*/tagger="\1" ts="\2"/p')
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date=$(date --date="1970-01-01 00:00:00 $ts seconds" +"$date_format")
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echo "Tag '$tag' created by $tagger at $date"
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git cat-file tag $3 | sed -n '5,$p'
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echo
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fi
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prev=$(git describe "$3^" | sed 's/-g.*//')
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# the first tag in a repo will yield no $prev
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if [ -z "$prev" ]; then
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echo "Changes since the dawn of time:"
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git rev-list --pretty $3 | $short
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else
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echo "Changes since $prev:"
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git rev-list --pretty $prev..$3 | $short
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echo ---
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git diff $prev..$3 | diffstat -p1
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echo ---
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fi
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;;
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refs/heads/*)
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branch="${1##refs/heads/}"
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echo "New branch '$branch' available with the following commits:"
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git-rev-list --pretty "$3"
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;;
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esac
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else
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base=$(git-merge-base "$2" "$3")
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case "$base" in
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"$2")
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git diff "$3" "^$base" | diffstat -p1
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echo
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echo "New commits:"
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;;
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*)
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;;
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esac
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git-rev-list --pretty "$3" "^$base"
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fi |
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mail -s "Changes to ref $1" "$recipient"
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fi) |
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mail -s "$project: Changes to '${1##refs/heads/}'" $recipients
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exit 0
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