Prepend Commit Message with Jira Ticket ID

prepare-commit-msg

#!/bin/sh

# Get the current branch name and check if it is excluded
BRANCH_NAME=$(git symbolic-ref --short HEAD)

# Trim it down to get the parts we're interested in
TRIMMED="$(echo "$BRANCH_NAME" | grep -Eo "[A-Z]{3,10}-[0-9]+")"

# See if the ticket prepend is already in the commit message
JIRA_ID_IN_MSG="$(grep -Eo "[A-Z]{3,}-[0-9]+\s\|\s" "$1")"

# If it isn't excluded, preprend the trimmed branch identifier to the given message
# Only prepend if
#   * There is a branch name
#   * There is a Jira ID in the branch name
#   * There is NOT a Jira ID already prepended to the message
if [ -n "$BRANCH_NAME" ] && [ -n "$TRIMMED" ] && [ -z "$JIRA_ID_IN_MSG" ]; then
  echo "Prepending commit message..."

  sed -i.bak -e "1s/^/$TRIMMED | /" "$1"
fi