Git hooks: prepare-commit-msg

prepare-commit-msg

#!/bin/bash

# Instructions to make hooks executable:
 #- for Windows (attrib +x prepare-commit-msg)
 #- for Linux (chmod +x prepare-commit-msg)

# -------------------------------------------------------------------------------------- #
# Retrieve Ticket ID from the branch name and insert it as prefix for the commit message #
# -------------------------------------------------------------------------------------- #
branch_name="$(git symbolic-ref --short HEAD)"
regex='(feature|hotfix|bugfix)\/([[:alpha:]]+-[[:digit:]]+)'

if [[ $branch_name =~ $regex ]]; then
    TICKET_ID=${BASH_REMATCH[2]}
    COMMIT_EDITMSG_FILE="$1"
    COMMIT_MESSAGE="$(cat $COMMIT_EDITMSG_FILE)"

    # Check if the same prefix is not already added in the commit message
    if ! [[ $COMMIT_MESSAGE =~ ^$TICKET_ID ]]; then
        echo "$TICKET_ID"' '"$COMMIT_MESSAGE" > $COMMIT_EDITMSG_FILE
    fi
elif [ $branch_name != "develop" ]; then
    echo "Incorrect branch name. If you want to skip the prepare-commit-msg hook just add --no-verify: git commit --no-verify"
    exit 1
fi