deploy

#!/bin/bash
source 'common'

PWD=`pwd`
ORIGIN_DIR=`basename $PWD`
DEPLOYMENT_DIR="deployment"
COMPILE_ASSETS=1
DEPLOY_ASSETS=1
DEPLOY_APP=1

ENV=$1
if [ ! -e "config/environments/$ENV.rb" ]
then
  echo "Select your target heroku environment: staging, production"
  exit 1
fi

ASSETS='public/assets'
if [ $ENV != 'production' ]
then
  ASSETS="$ASSETS-$ENV"
  DEPLOYMENT_DIR="$DEPLOYMENT_DIR-$ENV"
fi

HEROKU_ENV="heroku"
if [ $ENV != 'production' ]
then
  HEROKU_ENV="$HEROKU_ENV-$ENV"
fi

if [[ $@ =~ ' --without-assets' ]]
then
  log_brief "No assets will be deployed"
  DEPLOY_ASSETS=0
fi

if [[ $@ =~ ' --without-app' ]]
then
  log_brief "No app, only assets will be deployed"
  DEPLOY_APP=0
fi

if [[ $@ =~ ' --without-asset-compilation' ]]
then
  log_brief "No assets will be compiled"
  COMPILE_ASSETS=0
fi

log create a changelog
LAST_DEPLOY_REF='-'

if [[ "$@" =~ --ref:([a-z0-9]{4,})\s* ]]; then
  LAST_DEPLOY_REF="${BASH_REMATCH[1]}"
  CHANGE_LOG=`git log ...$LAST_DEPLOY_REF --no-merges --pretty=format:'-- %s'`
else
  CHANGE_LOG="No comment"
fi

echo Deploy from: $ORIGIN_DIR
echo Deploy to: $DEPLOYMENT_DIR
echo Target local environment: $ENV
echo Target Heroku environment: $HEROKU_ENV
echo Last Deploy Ref: $LAST_DEPLOY_REF
echo Changelog: $CHANGE_LOG

# TODO: If there are uncommitted changes to the source code, cancel the deployment

log temporarily save the assets
mv app/assets/images/ ..
# add more assets here
ls app/assets/images

log remove the old assets
rm -rf $ASSETS

log clear the asset caches
bundle exec rake tmp:clear
rake assets:clean RAILS_ENV=$ENV

log compile the assets
if [ $COMPILE_ASSETS -eq 1 ]
then
  rake assets:precompile --quiet RAILS_ENV=$ENV
fi

log_brief save $ASSETS/manifest.yml
if [ ! -e "$ASSETS/manifest.yml" ]; then
  echo "$ASSETS/manifest.yml not found..."
  echo "  be sure that it is in the source directory so it can be deployed "
  echo "   heroku"
  exit 2
else
  log_brief save $ASSETS/manifest.yml
fi

if [ $DEPLOY_ASSETS -eq 1 ]
then
  # be sure that rsync_pass is chmod 600
  log update assets on cdn
  rsync -var --exclude 'assets*' $ASSETS rsync://yourcdn.com --password-file config/rsync_pass

  log refresh the cdn edge server
  curl --data "queryparameters" https://yourcdn.com/purge/all
fi

mv $ASSETS/manifest.yml ./manifest.yml
rm -rf $ASSETS; mkdir $ASSETS
mv ./manifest.yml $ASSETS/manifest.yml

changedir ..

log remove the old deployment directory and create a new one
if [ -e $DEPLOYMENT_DIR ]; then
  rm -rf $DEPLOYMENT_DIR
  log_brief deployment directory removed
fi

mkdir $DEPLOYMENT_DIR
log_brief done

log copy the source codes to the pre-deployment directory
changedir $ORIGIN_DIR
tar zcpf - . | (cd ../$DEPLOYMENT_DIR; tar xfp -)
log_brief done

log put back the assets into their original directories
#mv ../your-assets app/assets/images
ls app/assets/images
log_brief done

changedir ../$ORIGIN_DIR

# copy robots.txt into the deployment directory
if [ $ENV != 'production' ]
then
  log_brief copying robots.txt for $ENV
  cp public/robots-$ENV.txt ../$DEPLOYMENT_DIR/public/robots.txt
fi

changedir ../$DEPLOYMENT_DIR

log remove git, bundle and tmp temporary files
rm -rf .git .bundle tmp log app/assets

log init git
git init
git add .

mkdir -p public/assets
cp $ASSETS/manifest.yml public/assets/

git add public/assets/manifest.yml --force
git add $ASSETS/manifest.yml --force

log copy .git/config to the deployment directory
cp ../$ORIGIN_DIR/.git/config .git/config

log commit deployment directory with changelog message
git commit -am "$CHANGE_LOG"

if [ $DEPLOY_APP -eq 1 ]
then
  log start deployment to heroku
  git push $HEROKU_ENV --force
fi

changedir ../$ORIGIN_DIR
echo Last deployment ref: `git log HEAD^.. --pretty=format:'%h'`