release.sh

#!/bin/bash
set -e

usage(){
  echo "Usage: ./script/release [current,major,minor,patch,pre] or ./script/release custom [version_number]"
  exit 1
}

function version_release
{
  mkdir -p config/initializers
  echo -e " info: writing: '$1' to RELEASE and 001_version_helper.rb"
  echo -e "ENV['CURRENT_VERSION'] = \"$1\"" > config/initializers/001_version_helper.rb
  echo -e "ENV['CURRENT_SHA']     = \"\`git rev-parse HEAD\`\"" >> config/initializers/001_version_helper.rb
  echo -e "# `date`" >> config/initializers/001_version_helper.rb
  git add config/initializers/001_version_helper.rb
  echo -e "$1" > RELEASE
  git add RELEASE
  git commit -am "Updating version_helper with latest tagged version $1"
  echo " info: deployed version $VERSION is not yet tagged; tagging now as $1"
  git tag -a $1 -m "Deployed $(LANG=en_US.UTF-8; date)."
}

function get_version_parts
{
  MAJOR=$(echo $1  | cut -d '.' -f 1)
  MINOR=$(echo $1  | cut -d '.' -f 2)
  PATCH=$(echo $1  | cut -d '.' -f 3 | cut -d '-' -f 1)

  if [[ $1 == *-* ]]; then
    PRE=$(echo $1  | cut -d '-' -f 2 | cut -d '.' -f 1,2)
    PRE_NAME=$(echo $PRE  | cut -d '.' -f 1)
    PRE_VERSION=$(echo $PRE  | cut -d '.' -f 2)
  else
    PRE=''
    PRE_NAME=''
    PRE_VERSION=''
  fi

  if [[ $PRE_VERSION == $PRE ]]; then
    PRE_VERSION=''
  fi
}

function print_version_info
{
  echo '-------------------------'
  echo "VERSION: $VERSION"
  echo "RELEASE: $RELEASE"
  echo "MAJOR: $MAJOR"
  echo "MINOR: $MINOR"
  echo "PATCH: $PATCH"
  echo "PRE: $PRE"
  echo "PRE_NAME: $PRE_NAME"
  echo "PRE_VERSION: $PRE_VERSION"
  echo '-------------------------'
}

function print_current_version
{
  echo -e "current release: $(cat RELEASE)"
}

[[ $# -eq 0 ]] && usage

if [[ ! -f RELEASE ]]; then
  echo "no RELEASE file so creating one with version 1.0.0..."
  echo "1.0.0" > RELEASE
fi

RELEASE=$(cat RELEASE  | cut -d ' ' -f 1)

if [[ -z $RELEASE ]]; then
  echo "NO RELEASE. add release to ./RELEASE"
fi


if [[ $# -eq 1 ]]; then
  if [ "$1" = 'current' ]; then
    print_current_version
    exit
  fi

  print_current_version
  VERSION=$(cat RELEASE)
  get_version_parts $VERSION
  print_version_info

  # FIXME: handle cases when other pre tags are used (10.1.2-alpha)
  if [[ $VERSION =~ beta ]] && [[ "$1" != 'pre' ]]; then
    VERSION=$(echo $VERSION | sed "s/-beta.*//")
    get_version_parts $VERSION
  elif [ "$1" = 'major' ]; then
    MAJOR=$((MAJOR+1))
    VERSION="$MAJOR.0.0"
  elif [ "$1" = 'minor' ]; then
    MINOR=$((MINOR+1))
    VERSION="$MAJOR.$MINOR.0"
  elif [ "$1" = 'patch' ]; then
    PATCH=$((PATCH+1))
    VERSION="$MAJOR.$MINOR.$PATCH"
  elif [ "$1" = 'pre' ]; then
    if [[ "$PRE_NAME" = '' ]]; then
      echo -n "enter prerelease version number: "
      read VERSION
      get_version_parts $VERSION

      PRE_VERSION=''
      PRE="-beta"
    else
      PRE_VERSION=$((PRE_VERSION+1))
      PRE="-$PRE_NAME.$PRE_VERSION"
    fi
    VERSION="$MAJOR.$MINOR.$PATCH$PRE"
  else
     echo "error: only major,minor,patch,pre accepeted"
     exit 1
  fi

else
  if [[ "$1" = 'custom' ]]; then
    VERSION="$2"
  fi
fi

get_version_parts $VERSION
print_version_info

if [ ! $(git describe 2> /dev/null) ]; then
  echo "warning: no previous git tags, creating first version: $VERSION"
  version_release $VERSION
elif [ ! $(git describe --exact-match $VERSION 2> /dev/null) ]; then
  version_release $VERSION
else
  echo "error: local git tag and remote REVISION match, can't version and create tag"
fi