Use a git hook to match a Jira issue ID from the current branch, and prepend it to every commit message

Assuming the current branch contains a Jira issue ID, you can use the a git hook script to prepend it to every commit message.

1. Create a commit-msg git hook script, and make it executable. (From your project's root directory, you can run install -b -m 755 /dev/null .git/hooks/commit-msg)

2. Save the following script to the newly-created .git/hooks/commit-msg

#!/bin/sh

COMMIT_FILE=$1
COMMIT_MSG=$(cat $1)
CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
JIRA_ID=$(echo "$CURRENT_BRANCH" | grep -Eo "[A-Z0-9]{1,10}-?[A-Z0-9]+-\d+")

if [ ! -z "$JIRA_ID" ]; then
    echo "$JIRA_ID $COMMIT_MSG" > $COMMIT_FILE
    echo "JIRA ID '$JIRA_ID', matched in current branch name, prepended to commit message. (Use --no-verify to skip)"
fi

• https://git-scm.com/docs/githooks
• https://confluence.atlassian.com/display/STASHKB/Integrating+with+custom+JIRA+issue+key