ghost.update

#! /bin/bash
# -----
# Ghost.org blogging platform updater script. 
# This script is a part of SCI Ghost Toolkit.
#
# Script makes backups (only data) at /var/backups/ghost/.
# All of the ./ghost.* scripts needed.
#
# Usage: ghost.update ghostservicename /path/to/ghost
#
# Error codes:
# 1 - Usage output
# 2 - Missing ghost installation path
# 3 - Script needs sudo
# 4 - Given path to ghost is not valid
# 5 - Could not stop service
# 6 - Backup script could not rsync content
# 7 - Backup script could not rsync config
# 8 - Backup script could not archive file
# 404 - Tool not found in ghost.assets
# -----
# Author: Adanos Flamel, SCI
#         adanos@stormcage.ru
# -----

# Some configuration things
PATH=$PATH:.

# ----- Print usage message----- Begin -----
if [[ $(echo $* | grep -e "--help") ]]; then
	. ghost.assets update_help
	exit $?
fi
# ----- Print usage message -----  End  -----

# ----- Require arguments ----- Begin -----
if [[ $* == "" || $# < 2 ]]; then
    echo -e "[Ghost Updater]: Missing arguments.\n" \
            "Usage: ghost.update ghostservicename /path/to/ghost \n"
    exit 2
fi
# ----- Require arguments -----  End  -----

# ----- Require root access ----- Begin -----
if [[ $UID != 0 ]]; then
    echo "[Ghost Updater]: Please run this script with sudo:"
    echo "sudo $0 $*"
    exit 3
fi
# ----- Require root access -----  End  -----

ghostpath=$2 # Path to ghost installation

# ----- Check ghost directory ----- Begin -----
if [[ ! -d $ghostpath ]]; then
    echo "[Ghost Updater]: $ghostpath is not a directory."
    exit 4
fi
# ----- Check ghost directory -----  End  -----

ghostservice=$1 # Ghost service name

# ----- Stop ghost instance ----- Begin -----
echo "[Ghost Updater]: Stopping Ghost instance."
service $ghostservice stop
if [[ $? != 0 ]]; then
	echo "[Ghost Updater]: Service $ghostservice was not stopped successfully."
	exit 5
fi
# ----- Stop ghost instance -----  End  -----

# ---- Create Ghost toolkit working directory ----- Begin -----
ghostworkpath="/tmp/ghosttemp"
mkdir $ghostworkpath
# ---- Create Ghost toolkit working directory -----  End  -----

echo "[Ghost Updater]: Backuping Ghost data."
. ghost.backup --chain # Backup ghost

# ---- Download and unzip lastest ghost distributive ----- Begin -----
echo "[Ghost Updater]: Downloading and unzipping lastest Ghost."
cd $ghostworkpath
curl -LOk https://ghost.org/zip/ghost-latest.zip
unzip ghost-latest.zip -d ghost-latest
# ---- Download and unzip lastest ghost distributive -----  End  -----

# ---- Update process itself ----- Begin -----
echo "[Ghost Updater]: Removing old engine files."
rm -rf $ghostpath/core
rm -f $ghostpath/config.example.js
rm -f $ghostpath/Gruntfile.js
rm -f $ghostpath/index.js
rm -f $ghostpath/npm-debug.log
rm -f $ghostpath/package.json
rm -f $ghostpath/PRIVACY.md
rm -f $ghostpath/README.md

echo "[Ghost Updater]: Removing old engine files."
cp -r $ghostworkpath/ghost-latest/core                  $ghostpath/
cp -r $ghostworkpath/ghost-latest/content/themes/casper $ghostpath/content/themes/
cp $ghostworkpath/ghost-latest/index.js                 $ghostpath/
cp $ghostworkpath/ghost-latest/package.json             $ghostpath/
cp $ghostworkpath/ghost-latest/npm-shrinkwrap.json      $ghostpath/
cp $ghostworkpath/ghost-latest/Gruntfile.js             $ghostpath/

echo "[Ghost Updater]: Updating permissions."
ghostowner=`ls -l $ghostpath/config.js | awk '{print $3}'` # Ghost directory owner
chown -R $ghostowner $ghostpath

echo "[Ghost Updater]: Applying update."
cd $ghostpath
npm install --production

echo "[Ghost Updater]: Starting Ghost."
service $ghostservice start
# ---- Update process itself -----  End  -----

echo "[Ghost Backup]: Removing working directory."
rm -rf $ghostworkpath