How to automatically prepend git commit with a branch name

prepare-commit-msg.sh

#!/bin/bash

# This way you can customize which branches should be skipped when
# prepending commit message.
if [ -z "$BRANCHES_TO_SKIP" ]; then
  BRANCHES_TO_SKIP=(master dev test)
fi

BRANCH_NAME=$(git symbolic-ref --short HEAD)
BRANCH_NAME="${BRANCH_NAME##*/}"
BRANCH_NAME=$(echo $BRANCH_NAME | sed 's/dev-/#; refs #/')

BRANCH_EXCLUDED=$(printf "%s\n" "${BRANCHES_TO_SKIP[@]}" | grep -c "^$BRANCH_NAME$")
BRANCH_IN_COMMIT=$(grep -c "\[$BRANCH_NAME\]" $1)

if [ -n "$BRANCH_NAME" ] && ! [[ $BRANCH_EXCLUDED -eq 1 ]] && ! [[ $BRANCH_IN_COMMIT -ge 1 ]]; then
  sed -i.bak -e "1s/^/$BRANCH_NAME/" $1
fi

#!/bin/bash

# If commit message already has issue ref, no change needed
if perl -ne 'print if /; \w+ #\d+/' $1 | grep -q .; then
  exit
fi

BRANCH_NAME=$(git symbolic-ref --short HEAD)
MESSAGE=$(echo $BRANCH_NAME | perl -lne 'print "; refs #$3" if m,^(.*/)?(dev-)?(\d+),')

if [ -n "$MESSAGE" ]; then
  case $2 in
    message)
      # Append to end of the first line
      perl -i -pe "s/\$/$MESSAGE/ if \$. == 1" $1
      ;;
    *)
      # Prepend commented-out message
      perl -i -pe "print \"#$MESSAGE\n\" if $. == 1" $1
      ;;
  esac
fi