text: #!/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 sha1> <remote ref> <remote sha1>
  #
  # This sample shows how to prevent push of commits where the log message starts
  # with "WIP" (work in progress).
  
  remote="$1"
  url="$2"
  
  z40=0000000000000000000000000000000000000000
  
  while read local_ref local_sha remote_ref remote_sha
  do
  	if [ "$local_sha" = $z40 ]
  	then
  		# Handle delete
  		:
  	else
  		if [ "$remote_sha" = $z40 ]
  		then
  			# New branch, examine all commits
  			range="$local_sha"
  		else
  			# Update to existing branch, examine new commits
  			range="$remote_sha..$local_sha"
  		fi
  
  		# Check for WIP commit
  		commit=`git rev-list -n 1 --grep '^WIP' "$range"`
  		if [ -n "$commit" ]
  		then
  			echo >&2 "Found WIP commit in $local_ref, not pushing"
  			exit 1
  		fi
  	fi
  done
  
  exit 0
  