commit-msg

#! /usr/bin/env sh

CYAN='\033[0;36m'
RED='\033[0;31m'
DC='\033[0m' # default color

sanitize_msg() {
    grep -E -o '^[^#].*' "$1"
}

# Do not allow empty messages after removing comments
[ -z "$(sanitize_msg "$1")" ] && {
    echo >&2 "${CYAN}Empty commit message not allowed.${DC}"
    exit 1
}

# Prepend to message Jira issues found in branch name but not found within message
BRANCH_ISSUE_REFS="$(git rev-parse --abbrev-ref HEAD | grep -E -io '\b[a-z]{3,}-[1-9][0-9]*\b')"
for ISSUE in ${BRANCH_ISSUE_REFS}; do
    ISSUE=$(echo "${ISSUE}" | tr '[:lower:]' '[:upper:]')
    sanitize_msg "$1" | grep -iE "\b${ISSUE}\b" || sed -i "" -e "1s/^/${ISSUE} /" "$1"
done
if [ -z "${BRANCH_ISSUE_REFS}" ]; then
    # Allow non prefixed commit messages, when branch name not referring JIRA issue
    sanitize_msg "$1" | grep -E -qi '\b[a-z]{3,}-[1-9][0-9]*\b' || {
        echo >&2 "${RED}Commit message does not contain JIRA issue ID. Consider amending message before pushing.${DC}"
    }
fi

commit-msg-check

#! /usr/bin/env sh

ORANGE='\033[0;33m'
DC='\033[0m' # default color
[ -x .git/hooks/commit-msg  ] || echo -e "${ORANGE}Consider setting up git hooks for this repo using https://gist.github.com/ITler/5636c9665b9aab28e31d0047855d3259${DC}"

DRAFT-prepare-commit-msg

#! /usr/bin/env bash

COMMIT_MSG_FILE=$1

branch_name=$(git symbolic-ref -q HEAD)
branch_name=${branch_name##refs/heads/}
branch_name=${branch_name:-HEAD}
branch_name=$(echo ${branch_name} | tr '[:lower:]' '[:upper:]')

firstLine=$(head -n1 "${COMMIT_MSG_FILE}")

if [ -z "${firstLine}"  ] ;then #Check that this is not an amend by checking that the first line is empty
    sed -i ""  "1s/^/${branch_name} /" "${COMMIT_MSG_FILE}" #Insert branch name at the start of the commit message file
fi

Git hook and optional check to integrate on shell-level with i.e. direnv.