Prepend ticket id to commits with husky and git hooks

package.json

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "husky" : {
	"hooks" : {
	  "prepare-commit-msg" : "bash prepare-commit-msg.sh"
	}
  },
  "author": "",
  "license": "ISC"
}

prepare-commit-msg.sh

#!/bin/bash
#
# Automatically adds branch name and branch description to every commit message.
# Modified from the gist here https://gist.github.com/bartoszmajsak/1396344
#

# This way you can customize which branches should be skipped when
# prepending commit message.
if [ -z "$BRANCHES_TO_SKIP" ]; then
	BRANCHES_TO_SKIP=(master develop)
fi

# Get branch name and description
BRANCH_NAME=$(git branch | grep '*' | sed 's/* //')

# Branch name should be excluded from the prepend
BRANCH_EXCLUDED=$(printf "%s\n" "${BRANCHES_TO_SKIP[@]}" | grep -c "^$BRANCH_NAME$")

TICKET_ID=$(echo "$BRANCH_NAME"| egrep -o '[A-Z]{,3}-[0-9]{,5}')

# A developer has already prepended the commit in the format [BRANCH_NAME]
BRANCH_IN_COMMIT=$(grep -c "$TICKET_ID" $1)

if [ -n "$TICKET_ID" ] && ! [[ $BRANCH_EXCLUDED -eq 1 ]] && ! [[ $BRANCH_IN_COMMIT -ge 1 ]]; then
    sed -i.bak -e "1s/^/$TICKET_ID: /" "$GIT_DIR/COMMIT_EDITMSG"
fi