prepare-commit-msg

#!/bin/sh
#
# Automatically adds ticket name to every commit message
# when branch name starts with "XX-00"
# 
# Don't change message when it already contains any ticket name.#
#

# Don't do anything when in merge - https://git-scm.com/docs/githooks#_prepare_commit_msg
[ -f $GIT_DIR/MERGE_MSG ] && exit 0

# Get ticket name
SHORT_NAME=$(git symbolic-ref --short HEAD | sed -e "s|^\([A-Z]\{1,\}-[0-9]\{1,\}\).*|\1|")

echo "Checking commit message..."
# Append ticket name only when it is exist
if [[ "$SHORT_NAME" =~ ([A-Z]+-[0-9]+) ]]; then
  if [[ `cat $1` =~ ([A-Z]+-[0-9]+) ]]; then
    echo "Message is ok, nothing to add."
  else
    echo "Appending: $SHORT_NAME"
    sed -i.bak -e "1s/^/$SHORT_NAME /" $1
  fi
else
  echo "Message is ok, nothing to add."
fi