#!/bin/sh

# An example hook script to verify what is about to be pushed.  Called by "git

# push" after it has checked the remote status, but before anything has been

# pushed.  If this script exits with a non-zero status nothing will be pushed.

#

# This hook is called with the following parameters:

#

# $1 -- Name of the remote to which the push is being done

# $2 -- URL to which the push is being done

#

# If pushing without using a named remote those arguments will be equal.

#

# Information about the commits which are being pushed is supplied as lines to

# the standard input in the form:

#

#   <local ref> <local oid> <remote ref> <remote oid>

#

# This sample shows how to prevent push of commits where the log message starts

# with "WIP" (work in progress).

remote="$1"

url="$2"

zero=$(git hash-object --stdin </dev/null | tr '[0-9a-f]' '0')

while read local_ref local_oid remote_ref remote_oid

do

	if test "$local_oid" = "$zero"

	then

		# Handle delete

		:

	else

		if test "$remote_oid" = "$zero"

		then

			# New branch, examine all commits

			range="$local_oid"

		else

			# Update to existing branch, examine new commits

			range="$remote_oid..$local_oid"

		fi

		# Check for WIP commit

		commit=$(git rev-list -n 1 --grep '^WIP' "$range")

		if test -n "$commit"

		then

			echo >&2 "Found WIP commit in $local_ref, not pushing"

			exit 1

		fi

	fi

done

exit 0