Add issue id to commit message.

commit-msg

#!/bin/bash

BRANCH=$(git symbolic-ref HEAD)
if [ "$BRANCH" == "refs/heads/master" ]; then
  echo "cannot commit on master branch."
  echo "please commit on topic branch."
  exit 1
fi

grep '^refs #[0-9]\+: ' $1
if [ $? -eq 0 ]; then
  exit
fi

ISSUE=$(echo $BRANCH | sed -e 's/^.*-id-\([0-9]\+\)$/refs #\1/')
if [ "$ISSUE" != "$BRANCH" ]; then
  echo "Auto append: $ISSUE"
  mv $1 $1.$$
  echo -n "$ISSUE: " > $1
  cat $1.$$ >> $1
  rm $1.$$
fi