prepare-commit-msg

#!/bin/sh

if [ "$2$3" = "" ]; then
    git ls-files --stage $(git diff --cached --name-only) | grep '^160000 ' |
    while read mode sha1 stage path
    do
        msg=`cd $path; git --no-pager log -1 --pretty=%s`
        echo "1a\n * `basename $path`: $msg\n.\nw" | ed "$1"
    done
fi