Git hook adds JIRA issue to commit text if found it in branch name

readme.md

• make sure the folder(s) ~/.git_template/hooks exists
• drop this file in there and make sure it’s named prepare-commit-msg
• make ~/.git_template/hooks/prepare-commit-msg executable. (chmod +x)
• make sure your ~/.gitconfig contains

[init]
templatedir = ~/.git_template

prepare-commit-msg

#!/bin/sh
#
# git prepare-commit-msg hook for automatically prepending an issue key
# from the start of the current branch name to commit messages.

# check if commit is merge commit or a commit ammend
if [ $2 = "merge" ] || [ $2 = "commit" ]; then
    exit
fi
ISSUE_KEY=`git rev-parse --abbrev-ref HEAD | grep -o "[A-Z0-9]\+-[0-9]\+"`
if [ $? -ne 0 ]; then
    # no issue key in branch, use the default message
    exit
fi
# issue key matched from branch prefix, prepend to commit message
grep "^[A-Z0-9]\+-[0-9]\+" $1 > /dev/null || sed -i -e "1s/^/$ISSUE_KEY /" $1