Bash commit-msg hook script to prepend JIRA issue ids based on the branch name

commit-msg

#!/bin/bash

is_project_id()
{
  project_ids=(BLOG OPS SYS IT PS PUB SS LP EX UBWEB)
  found=0

  for id in "${project_ids}"; do
    if [[ $id == $1 ]]; then
      found=1
      break
    fi
  done
  return $found
}

branch=$(git branch 2>/dev/null | grep -e ^* | tr -d ' *')

if [ -n "$branch" ] && [ "$branch" != "master" ]; then
  OIFS=$IFS
  IFS='-'
  read -a pieces <<< "$branch"
  IFS=$OIFS

  if [ "${#pieces[@]}" -gt 1 ]; then
    project=`tr '[a-z]' '[A-Z]' <<< "${pieces[0]}"`
    issue="${pieces[1]}"
    if is_project_id "$project" && [[ $issue =~ ^[0-9]+$ ]]; then
      echo "$project-$issue $(cat $1)" > $1
    fi
  fi
fi