Nextcloud upgrade script

upgrade

#!/bin/bash
# WF 2017-12-28
# automates upgrade procedure for nextcloud
#
# see 
#     http://wiki.bitplan.com/index.php/Nextcloud 
# for details
#
# see  
#    https://intux.de/2016/08/upgrade-nextcloud-9-0-50-10-0-0/
# for the manual procedure

# adapt to the settings of your server
download="/usr/local/src/nextcloud"
instroot="/usr/share"
ncroot="$instroot/nextcloud"
ncconfig="$ncroot/config/config.php"
ncowner="www-data.www-data"

#ansi colors
#http://www.csc.uvic.ca/~sae/seng265/fall04/tips/s265s047-tips/bash-using-colors.html
blue='\033[0;34m'  
red='\033[0;31m'  
green='\033[0;32m' # '\e[1;32m' is too bright for white bg.
endColor='\033[0m'

#
# a colored message 
#   params:
#     1: l_color - the color of the message
#     2: l_msg - the message to display
#
color_msg() {
  local l_color="$1"
  local l_msg="$2"
  echo -e "${l_color}$l_msg${endColor}"
}

#
# error
#
#   show an error message and exit
#
#   params:
#     1: l_msg - the message to display
error() {
  local l_msg="$1"
  # use ansi red for error
  color_msg $red "Error: $l_msg" 1>&2
  exit 1
}

#
# download the given version
#
dodownload() {
  cd $download
  local l_version="$1"
  local l_target=latest-$l_version.zip
  if [ -f $l_target ]
  then
    color_msg $green "nextcloud version $l_version file $l_target already downloaded"
  else
    color_msg $blue "downloading nextcloud version $l_version"
    wget https://download.nextcloud.com/server/releases/$l_target
  fi
}

#
# do upgrade to the next version
# without further ado / asking
#
doupgrade() {
  local l_current="$1"
  local l_next="$2"
  dodownload $l_current
  dodownload $l_next
  if [ ! -d $ncroot.$l_current ]
  then
    mv $ncroot $ncroot.$l_current
    cd $instroot 
    unzip $download/latest-$l_next.zip 
  fi
  # check whether config file has been copied already
  if [ ! -f "$ncconfig" ] 
  then
    color_msg $blue "copying config.php from old version $l_current to new version $l_next"
    cp -p $ncroot.$l_current/config/config.php $ncconfig
  fi
  # check whether data directory has been copied already
  if [ ! -d "$ncroot/data" ] 
  then
    color_msg $blue "copying data from old version $l_current to new version $l_next"
    cp -pr $ncroot.$l_current/data $ncroot/data/
  fi
  chown -R $ncowner $ncroot 
}

#
# upgrade to the next version 
# after confirmation
#
upgrade() {
  local l_current="$1"
  local l_next="$((l_current+1))"
  color_msg $blue "Would you like to upgrade nextcloud from version $l_current to $l_next (yes/no)?"
  read answer
  case $answer in
   y|yes) 
     doupgrade $l_current $l_next
   ;;
   *) error "upgrade aborted on user request"
  esac
}

#
# check the next cloud version
# and auto upgrade to the next major release
#
autoupgrade() {
  color_msg $blue "checking nextcloud version"
  if [ -d "$ncroot" ]
  then
    color_msg $green "found nextcloud installation in $ncroot"
    if [ -f "$ncconfig" ] 
    then
      color_msg $green "found nextcloud config file at $ncconfig"
      version=$(getVersion)
      major=$(getMajorVersion)
      color_msg $green "nextcloud version $major => $version is installed"
      upgrade $major
    else
      error "missing nextcloud config file $l_ncconfig"
    fi    
  else
    error "could not find nextcloud installation in $ncroot"
  fi
}

#
# get the version
# 
occVersion() {
  sudo -u www-data php $ncroot/occ --version 
}

#
# get the nextcloud version
#
getVersion() {
  occVersion | cut -f3 -d" "
}

#
# get the major version 
#
getMajorVersion() {
  getVersion | cut -f1 -d"."
}

#
# automatic major version upgrade
# comment out if you would like to control the upgrade manually

autoupgrade
#doupgrade 9 10
#doupgrade 10 11
#doupgrade 11 12