git hook commit-msg (path to insert: .git\hooks\)

commit-msg

#!/bin/sh
#
# Hook script to prepend the commit log message with a branch name
# Not prepend the name of the branch only if:
# - branch name starts with one of the options in $NO_PREFIX_IF_BRANCH_STARTSWITH
# - commit message starts with one of the options in $NO_PREFIX_IF_THIS_IN_COMMIT_MESSAGE
# - branch name has been manually prepended in the commit message
# lnk: https://gist.github.com/shevaroller/680719f31e610cff3e6d8c930a078eb0
# edited by fosemberg

NO_PREFIX_IF_BRANCH_STARTSWITH=(master develop)
NO_PREFIX_IF_THIS_IN_COMMIT_MESSAGE=(Merge)

BRANCH_NAME=$(git symbolic-ref --short HEAD)
COMMIT_MESSAGE=$(cat $1)

IS_PREPEND=1

for PREFIX in "${NO_PREFIX_IF_BRANCH_STARTSWITH[@]}"
do
    if [[ $BRANCH_NAME == $PREFIX* ]]; then
        IS_PREPEND=0
        break
    fi
done
for PREFIX in "${NO_PREFIX_IF_THIS_IN_COMMIT_MESSAGE[@]}"
do
    if [[ $COMMIT_MESSAGE == $PREFIX* ]]; then
        IS_PREPEND=0
        break
    fi
done
if [ "$IS_PREPEND" -eq 1 ] && [ -n "$BRANCH_NAME" ] && ! [[ $COMMIT_MESSAGE == $BRANCH_NAME* ]]; then
    sed -i.bak -e "1s/^/$BRANCH_NAME /" $1
fi