prepare-commit-msg git hook

prepare-commit-msg

#!/bin/bash

BRANCH=$(git rev-parse --abbrev-ref HEAD)
BRANCH_PREFIX=$(echo "$BRANCH" | cut -d'/' -f1)

JIRA_ID=$(echo "$BRANCH_PREFIX" | awk '{print toupper($1)}')
JIRA_ID_MATCHER="^[a-zA-Z]+-[0-9]+$"
NO_TICKET_MATCHER="^NO-TICKET$"

COMMIT_MSG=$(head -n1 "$1")
COMMIT_PATTERN_JIRA_ID="^\[?[a-zA-Z]+-[0-9]+\]?"
COMMIT_PATTERN_NO_TICKET="^\[?NO-TICKET\]?"

if [[ "$JIRA_ID" =~ $JIRA_ID_MATCHER || "$JIRA_ID" =~ $NO_TICKET_MATCHER ]]; then
  if ! [[ "$COMMIT_MSG" =~ $COMMIT_PATTERN_JIRA_ID || "$COMMIT_MSG" =~ $COMMIT_PATTERN_NO_TICKET ]]; then
    sed -i.bak -e "1s/^/[$JIRA_ID] /" "$1"
  fi
fi

pretty useful for every company I've been to, always similar commit pattern