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#!/bin/bash
#
# wordpress management script.
#

BASE="<%= folder %>"
LOCALE="<%= real_wordpress_locale %>"

# Set alternative base
function wordpress_set_base {
  if [ ! -z "$1" ]; then
    BASE="$1"

    if [ ! -d "$BASE" ]; then
      echo "No such folder $BASE"
      exit 1
    fi
  fi
}

# Check for existing installations
function wordpress_check_existing {
  if [ -e "$BASE/wordpress-$1" ]; then
    echo "Folder $BASE/wordpress-$1 already exists, skipping."
    exit 1
  fi  
}

# Deploy a fresh wordpress tree
function wordpress_deploy {
  if [ -z "$1" ]; then
    echo "Usage: `basename $0` deploy <version> [folder]"
    exit 1
  fi

  # Setup
  new="$1"
  wordpress_set_base $2
  wordpress_check_existing $new

  # Deploy a fresh wordpress tree
  cd $BASE
  wget http://br.wordpress.org/wordpress-$new$LOCALE.zip
  unzip wordpress-$new$LOCALE.zip && rm wordpress-$new$LOCALE.zip
  mv wordpress wordpress-$new/
  chown -R root.root wordpress-$new/
}

# Upgrade a wordpress instance using upstream source.
function wordpress_upgrade {
  if [ -z "2" ]; then
    echo "Usage: `basename $0` upgrade <old_version> <new_version> [folder]"
    exit 1
  fi

  # Setup
  old="$1"
  new="$2"
  extra_folders=""
  wordpress_set_base $3
  wordpress_check_existing $new

  cd $BASE

  if [ ! -d "wordpress-$old" ]; then
    echo "Installation not found: wordpress-$old"
    exit
  fi

  cp -a wordpress-$old wordpress-$old.backup
  
  # Deploy a fresh wordpress tree
  wordpress_deploy $new
  
  # Copy files
  for file in .htaccess wp-config.php; do
    if [ -e "wordpress-$old/$file" ]; then
      cp -a wordpress-$old/$file wordpress-$new/
    fi
  done

  # Extra folders
  for extra_folder in $extra_folders; do
    if [ -d ../wordpress-$old/$extra_folder ]; then
      cp -Rp ../wordpress-$old/$extra_folder .
    fi
  done
  
  # Files
  rsync -av wordpress-$old/wp-content/uploads/ wordpress-$new/wp-content/uploads/
  rsync -av wordpress-$old/wp-content/blogs.dir/ wordpress-$new/wp-content/blogs.dir/

  # Plugins
  for plugin in `ls wordpress-$old/wp-content/plugins/`; do
    if [ ! -e "wordpress-$new/wp-content/plugins/$plugin" ]; then
      cp -r wordpress-$old/wp-content/plugins/$plugin wordpress-$new/wp-content/plugins/
    fi
  done

  # Themes
  for theme in `ls wordpress-$old/wp-content/themes/`; do
    if [ ! -e "wordpress-$new/wp-content/themes/$theme" ]; then
      cp -r wordpress-$old/wp-content/themes/$theme wordpress-$new/wp-content/themes/
    fi
  done

  # Fix permissions
  chown -R root.root wordpress-$new/wp-content/{plugins,themes}

  # Set sunrise symlink
  if [ -f "wordpress-$new/wp-content/plugins/wordpress-mu-domain-mapping/sunrise.php" ]; then
    ( cd wordpress-$new/wp-content && ln -s plugins/wordpress-mu-domain-mapping/sunrise.php )
  fi

  # Change symlink to point to the new location
  if [ -h "site" ]; then
    link="`readlink site`"
    if [ "`basename $link`" == "wordpress-$old" ]; then
      rm site && ln -s wordpress-$new site
    fi
  fi

  # Done
  echo "Audit: `du -hs wordpress-$old`"
  echo "Audit: `du -hs wordpress-$new`"
  echo "Check procedure and remove wordpress-$old once you make sure that everything is fine."
}

# Usage
function wordpress_usage {
  /usr/local/share/wp-cli/src/bin/wp help
  echo ""
  echo "Installation management commands:"
  echo "    wp deploy <version>"
  echo "    wp upgrade <old-version> <new-version>"
}

# Main procedure
if [ -z "$1" ]; then
  wordpress_usage
  exit 1
elif [ "$1" == "deploy" ]; then
  shift
  wordpress_deploy $*
elif [ "$1" == "upgrade" ]; then
  shift
  wordpress_upgrade $*
elif [ "$1" == "help" ]; then
  wordpress_usage
elif [ "$1" == "core" ]; then
  echo "Please use deploy or upgrade instead."
else
  # Send all other requests to wp-cli 
  #/usr/local/share/wp-cli/src/bin/wp --path=$BASE/wordpress $*
  /usr/local/share/wp-cli/src/bin/wp $*
fi