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

BASE="<%= scope.lookupvar('pmwiki::www_folder') %>"

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

# Deploy a fresh pmwiki tree
function pmwiki_deploy {
  if [ "$#" != "1" ]; then
    echo "Usage: `basename $0` deploy <version>"
    exit 1
  fi

  # Setup
  new="$1"
  cd $BASE
  pmwiki_check_existing $new

  # Deploy a fresh pmwiki tree
  wget http://pmwiki.org/pub/pmwiki/pmwiki-$new.tgz
  wget http://pmwiki.org/pub/pmwiki/i18n/i18n-all.zip
  tar zxvf pmwiki-$new.tgz && rm pmwiki-$new.tgz
  ( cd pmwiki-$new && unzip -o ../i18n-all.zip && rm $_ )

  if [ ! -e "pmwiki-$new/index.php" ]; then
    ( cd pmwiki-$new && ln -s pmwiki.php index.php )
  fi

  chown -R root.root pmwiki-$new/
}

# Upgrade a pmwiki instance using upstream source.
function pmwiki_upgrade {
  if [ "$#" != "2" ]; then
    echo "Usage: `basename $0` upgrade <old_version> <new_version>"
    exit 1
  fi

  # Setup
  old="$1"
  new="$2"
  extra_folders=""
  
  pmwiki_check_existing $new

  cd $BASE
  cp -a pmwiki-$old pmwiki-$old.backup
  
  # Deploy a fresh pmwiki tree
  pmwiki_deploy $new
  
  # Copy files
  for file in .htaccess index.php farmconfig.php local config.php wiki.d; do
    if [ -e "pmwiki-$old/$file" ]; then
      cp -a pmwiki-$old/$file pmwiki-$new/
    fi
  done
  for extra_folder in $extra_folders; do
    if [ -d ../pmwiki-$old/$extra_folder ]; then
      cp -Rp ../pmwiki-$old/$extra_folder .
    fi
  done
  
  # Themes and cookbook
  rsync -av pmwiki-$old/cookbook/ pmwiki-$new/cookbook
  rsync -av --exclude=pmwiki --exclude=print pmwiki-$old/pub/skins/ pmwiki-$new/pub/skins/

  # Change symlink to point to the new location
  cd $BASE ; rm -f wiki && ln -s pmwiki-$new wiki

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

# Main procedure
if [ -z "$1" ]; then
  echo "Usage: `basename $0` <deploy|upgrade> [arguments]"
  exit 1
elif [ "$1" == "deploy" ]; then
  shift
  pmwiki_deploy $*
elif [ "$1" == "upgrade" ]; then
  shift
  pmwiki_upgrade $*
fi