Add Jira ticket to commit

prepare-commit-msg

#!/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
    declare -a BRANCHES_TO_SKIP=(master staging develop)
fi

if [ -z "$GIT_DIR" ]; then
    GIT_DIR=.git
fi

# Will find a ticket number anywhere in a string.
TICKET_ANYWHERE_REGEX="([A-Z]+-\d+)"

# Will find the ticket number at the beginning of a string only.
# Tests https://regex101.com/r/InYZZV/2
TICKET_AT_START_ONLY_REGEX="^$TICKET_ANYWHERE_REGEX"

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

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

# Gets a ticket number already at the start of the commit message (if it is present)
TICKET_AT_START_OF_COMMIT_MSG=$(grep --extended-regexp --only-matching $TICKET_AT_START_ONLY_REGEX $GIT_DIR/COMMIT_EDITMSG)

# Prefix should contain a valid ticket format
IS_COMMIT_BRANCH_VALID=$(echo "$TICKET_AT_START_OF_COMMIT_MSG" | grep --extended-regexp --count "$TICKET_ANYWHERE_REGEX$")

BRANCH_VALID_PREFIX=$(echo "$BRANCH_NAME" | grep --extended-regexp --only-matching $TICKET_ANYWHERE_REGEX)

if [[ -n $TICKET_AT_START_OF_COMMIT_MSG ]] && ! [[ $BRANCH_EXCLUDED -eq 1 ]] && [[ $IS_COMMIT_BRANCH_VALID -le 0 ]]; then
  echo "Check your ticket number."
  exit 1
fi

if ! [[ -n $BRANCH_VALID_PREFIX ]] && ! [[ $BRANCH_EXCLUDED -eq 1 ]] && [[ $IS_COMMIT_BRANCH_VALID -eq 0 ]]; then
  echo "Check your branch name or commit with a valid ticket number."
  exit 1
fi

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