Print changelog to use for Github releases. (Goes through all commits, and shows the one with a #changelog hashtag)

changelog.sh

#!/bin/bash

#echo git log $1...$2 --pretty=format:'<li> <a href="http://github.com/jerel/<project>/commit/%H">view commit &bull;</a> %s</li> ' --reverse | grep "#changelog"

firstTag=$(git tag | tail -2 | head -1)
secondTag=$(git tag | tail -1)
cmd=$(basename $0)

if [ "$1" == "-h" ]
then
  echo ""
  echo "Usage:"
  echo "  '$cmd' prints the changelog from the last two tags"
  echo "  '$cmd v1.0.0' prints the changelog from v1.0.0 to the latest tag except if:"
  echo "  '$cmd HEAD' which prints the changelog from the latest tag to HEAD"
  echo "  '$cmd v1.0.0 v2.0.0' prints the changelog from v1.0.0 to v2.0.0"
  echo ""
  exit
fi

if [ $# -eq 2 ] 
then
  firstTag=$1
  secondTag=$2
else
  if [ $# -eq 1 ]
  then
    if [ "$1" == "HEAD" ]
    then
      secondTag="HEAD"
    else
      firstTag=$1
    fi
  fi
fi

echo
echo "Type '$cmd -h' for usage"

echo
echo "CHANGELOG from $firstTag to $secondTag"
echo

git log $firstTag...$secondTag --pretty=format:'- [%h](https://github.com/enyo/dropzone/commit/%H) %s ||||>>>> %b' --reverse | grep "#changelog" | sed 's/^\(.*\)||||>>>>.*$/\1/'

echo
echo