#!/bin/sh

 #

 # An example hook script to blocks unannotated tags from entering.

 # Called by git-receive-pack with arguments: refname sha1-old sha1-new

 #

 # To enable this hook, rename this file to "update".

 #

 # Config

 # ------

 # hooks.allowunannotated

 #   This boolean sets whether unannotated tags will be allowed into the

 #   repository.  By default they won't be.

 # hooks.allowdeletetag

 #   This boolean sets whether deleting tags will be allowed in the

 #   repository.  By default they won't be.

 # hooks.allowmodifytag

 #   This boolean sets whether a tag may be modified after creation. By default

 #   it won't be.

 # hooks.allowdeletebranch

 #   This boolean sets whether deleting branches will be allowed in the

 #   repository.  By default they won't be.

 # hooks.denycreatebranch

 #   This boolean sets whether remotely creating branches will be denied

 #   in the repository.  By default this is allowed.

 #

 

 # --- Command line

 refname="$1"

 oldrev="$2"

 newrev="$3"

 

 # --- Safety check

 if [ -z "$GIT_DIR" ]; then

 	echo "Don't run this script from the command line." >&2

 	echo " (if you want, you could supply GIT_DIR then run" >&2

 	echo "  $0 <ref> <oldrev> <newrev>)" >&2

 	exit 1

 fi

 

 if [ -z "$refname" -o -z "$oldrev" -o -z "$newrev" ]; then

 	echo "Usage: $0 <ref> <oldrev> <newrev>" >&2

 	exit 1

 fi

 

 # --- Config

 allowunannotated=$(git config --bool hooks.allowunannotated)

 allowdeletebranch=$(git config --bool hooks.allowdeletebranch)

 denycreatebranch=$(git config --bool hooks.denycreatebranch)

 allowdeletetag=$(git config --bool hooks.allowdeletetag)

 allowmodifytag=$(git config --bool hooks.allowmodifytag)

 

 # check for no description

 projectdesc=$(sed -e '1q' "$GIT_DIR/description")

 case "$projectdesc" in

 "Unnamed repository"* | "")

 	echo "*** Project description file hasn't been set" >&2

 	exit 1

 	;;

 esac

 

 # --- Check types

 # if $newrev is 0000...0000, it's a commit to delete a ref.

 zero="0000000000000000000000000000000000000000"

 if [ "$newrev" = "$zero" ]; then

 	newrev_type=delete

 else

 	newrev_type=$(git-cat-file -t $newrev)

 fi

 

 case "$refname","$newrev_type" in

 	refs/tags/*,commit)

 		# un-annotated tag

 		short_refname=${refname##refs/tags/}

 		if [ "$allowunannotated" != "true" ]; then

 			echo "*** The un-annotated tag, $short_refname, is not allowed in this repository" >&2

 			echo "*** Use 'git tag [ -a | -s ]' for tags you want to propagate." >&2

 			exit 1

 		fi

 		;;

 	refs/tags/*,delete)

 		# delete tag

 		if [ "$allowdeletetag" != "true" ]; then

 			echo "*** Deleting a tag is not allowed in this repository" >&2

 			exit 1

 		fi

 		;;

 	refs/tags/*,tag)

 		# annotated tag

 		if [ "$allowmodifytag" != "true" ] && git rev-parse $refname > /dev/null 2>&1

 		then

 			echo "*** Tag '$refname' already exists." >&2

 			echo "*** Modifying a tag is not allowed in this repository." >&2

 			exit 1

 		fi

 		;;

 	refs/heads/*,commit)

 		# branch

 		if [ "$oldrev" = "$zero" -a "$denycreatebranch" = "true" ]; then

 			echo "*** Creating a branch is not allowed in this repository" >&2

 			exit 1

 		fi

 		;;

 	refs/heads/*,delete)

 		# delete branch

 		if [ "$allowdeletebranch" != "true" ]; then

 			echo "*** Deleting a branch is not allowed in this repository" >&2

 			exit 1

 		fi

 		;;

 	refs/remotes/*,commit)

 		# tracking branch

 		;;

 	refs/remotes/*,delete)

 		# delete tracking branch

 		if [ "$allowdeletebranch" != "true" ]; then

 			echo "*** Deleting a tracking branch is not allowed in this repository" >&2

 			exit 1

 		fi

 		;;

 	*)

 		# Anything else (is there anything else?)

 		echo "*** Update hook: unknown type of update to ref $refname of type $newrev_type" >&2

 		exit 1

 		;;

 esac

 

 # --- Finished

 exit 0