prepare-commit-msg.sh

#!/usr/bin/env bash

commit_message=$1
commit_type=$2
commit_hash=$3
prefix="[commit prefix]"

heading=$(head -1 ${commit_message})

if [ -z "${heading}" ]
then
    sed -i "1s/^/${prefix}: <insert heading here>\n/" ${commit_message}
elif [[ ${heading} != "${prefix}"* ]]
then
    sed -i "1s/^.*/${prefix}: ${heading}/" ${commit_message}
fi

line_count=$(egrep -v "ChangeId|^#|^$" -c ${commit_message})

if [ ${line_count} -lt 3 ]
then
    sed -i '2 a<insert description here>\n' ${commit_message}
fi