prepare-commit-msg

#!/bin/sh
# borrowed heavily from http://stackoverflow.com/a/17270862

jiraNumber=$(git branch | grep '*' | egrep -io '[C][[:alpha:]][-[:digit:]]+')
firstLine=$(head -n1 $1)

if [ -z "$firstLine"  ] ;then # Check that this is not an amend by checking that the first line is empty
  sed -i "" "1s/^/$jiraNumber /" $1 # Insert branch name at the start of the commit message file
fi