Fixed version of DarkerNZBget (developer branch) for usage with docker

DarkerNZBget.sh

#!/usr/bin/env bash
#
# DarkerNZBGet theme installer
#
# Version history
# v1.2.0 - 03/28/2018 - Added icon color prompt option and code to copy over the corresponding PNG file.
# v1.1.3 - 03/28/2018 - Added cleanup functionality and made some functions more efficient.
# v1.1.2 - 03/28/2018 - Added additional options checks.
# v1.1.1 - 03/27/2018 - Added functionality to ensure provided Docker container exists on the Server.
# v1.1.0 - 03/27/2018 - Added functionality to install theme to Docker containers.
# v1.0.0 - 03/26/2018 - The original.
#
# Created by: Tronyx

# Determine if user is root and, if not, tell them to use sudo
if [ "$EUID" -ne 0 ]; then
  echo "Please run the script as root or use sudo when executing this script..."
  exit
fi

# Define local install or Docker container options
function usage {
  cat <<EOM
~*DarkerNZBGet Theme Installer*~

Usage: $(basename "$0") [OPTION]...

-i VALUE    Install type:
            -i local
            -i docker

-c VALUE    Docker container name
            -c nzbget

-h          Display usage

Specfify the Nzbget installation type with the -i option:
Local install: sudo ./install.sh -i local
Docker container: sudo ./install.sh -i docker
If you specify Docker, you must provide the Nzbget container name.
Provide the Docker container name with the -c option:
Container called nzbget: sudo ./install.sh -i docker -c nzbget
EOM

exit 2
}

while getopts "hi:c:" OPTION
  do
  case "$OPTION" in
    i)
      installType="$OPTARG"
      ;;
    c)
      dockerContainer="$OPTARG"
      ;;
    :)
      echo "Option -$OPTARG requires an argument."
      exit 1
      ;;
    h|*)
      usage
      ;;
  esac
done

if [[ $1 == "" ]]; then
  usage
  exit 1
elif ! [[ "$installType" =~ ^(local|docker)$  ]]; then
  usage
  exit 1
elif [[ "$installType" == "docker" && "$dockerContainer" == "" ]]; then
  usage
  exit 1
fi


# Prompt user to choose black or white icons and validate correct options
function choose_color {
  read -p 'Which icon color do you want? ([w]hite or [b]lack): ' color
  if ! [[ "$color" =~ ^(black|b|white|w)$  ]]; then
    echo "Please specify black, b, white, or w."
    read -p 'Which icon color do you want? ([w]hite or [b]lack): ' color
  else
    :
  fi
}

# Determine if provided Docker container name is valid
function validate_container {
  docker ps --format '{{.Names}}' > /tmp/containers_list.txt
  if grep -q "${dockerContainer}" /tmp/containers_list.txt; then
    echo "Provided Docker container name is valid, continuing..."
  else
    echo "Provided Docker container name is NOT valid!"
    exit 1
  fi
}

# Determine which Package Manager to use
function package_manager {
  echo "Gathering some information and setting some variables..."
  declare -A osInfo;
  osInfo[/etc/redhat-release]='yum -y -q'
  osInfo[/etc/arch-release]=pacman
  osInfo[/etc/gentoo-release]=emerge
  osInfo[/etc/SuSE-release]=zypp
  osInfo[/etc/debian_version]='apt-get -y -qq'

  for f in "${!osInfo[@]}"
    do
      if [[ -f $f ]];then
        packageManager=${osInfo[$f]}
      fi
    done
}

# Determine Nzbget install location and set it as a variable
function get_nzb_dir {
  nzbgetDir=$(locate nzbget |grep conf |head -1 |rev |cut -c12-50 |rev)
}

# Determine Docker AppData dir for NZBget container
function get_appdata_dir {
  appDataDir=$(docker inspect "${dockerContainer}" |grep -A5 -i hostconfig |grep config |rev |cut -c11-50 |rev |tr -d '"' |tr -d ' ')
}

# Make sure unzip and wget are installed
function install_packages {
  echo "Making sure unzip and wget are installed..."
  ${packageManager} install unzip wget
}

# Grab the Darker Nzbget theme CSS archive and extract it
function grab_archive {
  echo "Downloading and extracting the Darker Nzbget theme CSS archive..."
  wget -q -O /tmp/DarkerNZBget.zip https://github.com/ydkmlt84/DarkerNZBget/archive/develop.zip
  unzip -qq -o /tmp/DarkerNZBget.zip -d /tmp/
}

# Display banner
function display_banner {
  cat /tmp/DarkerNZBget-develop/Misc/art.txt
}

# Create backup dir and make a backup of the existing style.css and icons.png files
function backup {
  echo "Backing up the original style.css and icons.png files..."
  if [[ "${installType}" = "local" ]]; then
    if [ ! -d "${nzbgetDir}webui/backup" ]; then
      mkdir -p "${nzbgetDir}webui/backup"
      yes |cp -rf "${nzbgetDir}webui/style.css" "${nzbgetDir}webui/backup/style.css.original"
      yes |cp -rf "${nzbgetDir}webui/img/icons.png" "${nzbgetDir}webui/backup/icons.png.original"
    else
      :
    fi
  elif [[ "${installType}" = "docker" ]]; then
    mkdir -p "${appDataDir}"/backup
    docker cp "${dockerContainer}":/app/webui/style.css "${appDataDir}"/backup/style.css.original
    docker cp "${dockerContainer}":/app/webui/img/icons.png "${appDataDir}"/backup/icons.png.original
  fi
}

# Install the DarkerNZBget CSS and icons.png files
function install_theme {
  echo "Installing the custom CSS and icons files..."
  if [[ "${installType}" = "local" ]]; then
    if [[ -f "${nzbgetDir}webui/backup/style.css.original" && -f "${nzbgetDir}webui/backup/icons.png.original" ]]; then
      echo "Whoops.. Somehow the stock files didn't get backed up..."
      echo "Let's try that again..."
      yes |cp -rf "${nzbgetDir}webui/style.css" "${nzbgetDir}webui/backup/style.css.original"
      yes |cp -rf "${nzbgetDir}webui/img/icons.png" "${nzbgetDir}webui/backup/icons.png.original"
      echo "Installing the custom CSS and icons files...again..."
      yes |cp -rf /tmp/DarkerNZBget-develop/nzbget_custom_darkblue.css "${nzbgetDir}webui/style.css"
        if [[ "${color}" =~ ^(black|b)$ ]]; then
          yes |cp -rf /tmp/DarkerNZBget-develop/Misc/black_icons.png "${nzbgetDir}webui/img/icons.png"
        elif [[ "${color}" =~ ^(white|w)$ ]]; then
          yes |cp -rf /tmp/DarkerNZBget-develop/Misc/white_icons.png "${nzbgetDir}webui/img/icons.png"
        fi
    else
      yes |cp -rf /tmp/DarkerNZBget-develop/nzbget_custom_darkblue.css "${nzbgetDir}webui/style.css"
      if [[ "${color}" =~ ^(black|b)$ ]]; then
        yes |cp -rf /tmp/DarkerNZBget-develop/Misc/black_icons.png "${nzbgetDir}webui/img/icons.png"
      elif [[ "${color}" =~ ^(white|w)$ ]]; then
        yes |cp -rf /tmp/DarkerNZBget-develop/Misc/white_icons.png "${nzbgetDir}webui/img/icons.png"
      fi
    fi
  elif [[ "${installType}" = "docker" ]]; then
    if [[ ! -f "${appDataDir}/backup/style.css.original" ]]; then
      echo "Whoops.. Somehow the stock files didn't get backed up..."
      echo "Let's try that again..."
      docker cp "${dockerContainer}":/app/webui/style.css "${appDataDir}"/backup/style.css.original
      docker cp "${dockerContainer}":/app/webui/img/icons.png "${appDataDir}"/backup/icons.png.original
      echo "Installing the custom CSS and icons files...again..."
      docker cp /tmp/DarkerNZBget-develop/nzbget_custom_darkblue.css "${dockerContainer}":/app/webui/style.css
      if [[ "${color}" =~ ^(black|b)$ ]]; then
        docker cp /tmp/DarkerNZBget-develop/Misc/black_icons.png "${dockerContainer}":/app/webui/img/icons.png
      elif [[ "${color}" =~ ^(white|w)$ ]]; then
        docker cp /tmp/DarkerNZBget-develop/Misc/white_icons.png "${dockerContainer}":/app/webui/img/icons.png
      fi
    else
      docker cp /tmp/DarkerNZBget-develop/nzbget_custom_darkblue.css "${dockerContainer}":/app/webui/style.css
      if [[ "${color}" =~ ^(black|b)$ ]]; then
        docker cp /tmp/DarkerNZBget-develop/Misc/black_icons.png "${dockerContainer}":/app/webui/img/icons.png
      elif [[ "${color}" =~ ^(white|w)$ ]]; then
        docker cp /tmp/DarkerNZBget-develop/Misc/white_icons.png "${dockerContainer}":/app/webui/img/icons.png
      fi
    fi
  fi
}

# Cleanup downloaded and extracted dirs and files
function cleanup {
  echo "Tidying some things up..."
  rm -rf /tmp/DarkerNZBget* /tmp/containers_list.txt
}

# Verify the DarkerNZBget CSS has been installed and display corresponding message(s)
function validate_install {
  echo "Validating that the DarkerNZBget theme was installed..."
  if [[ "${installType}" = "local" ]]; then
    if grep -q DarkerNZBget "${nzbgetDir}webui/style.css"; then
      echo "The DarkerNZBget theme has been successfully installed!"
      echo "Please refresh your browser window/tab to see the new theme."
    else
      echo "The DarkerNZBget theme has NOT been installed!"
    fi
  elif [[ "${installType}" = "docker" ]]; then
    if docker exec "${dockerContainer}" grep -q DarkerNZBget app/webui/style.css; then
      echo "The DarkerNZBget theme has been successfully installed!"
      echo "Please refresh your browser window/tab to see the new theme."
      echo "NOTE: You will need to run this script every time you recreate the container!"
    else
      echo "The DarkerNZBget theme has NOT been installed!"
    fi
  fi
}

# Execute functions
choose_color
if [[ "${installType}" = "local" ]]; then
  package_manager
  get_nzb_dir
  install_packages
elif [[ "${installType}" = "docker" ]]; then
  validate_container
  get_appdata_dir
fi
grab_archive
display_banner
backup
install_theme
cleanup
validate_install

DarkerNZBget

NZBget Docker Container Install

Here's an example run of the script with an NZBget Docker Container install:

[tronyx@suladan ~]$ wget https://gist.githubusercontent.com/martin-juul/e45039b15ad83c0a72bc5900d4e60f91/raw/fd39e456680c3708c7ee29377bfa0fefab743833/DarkerNZBget.sh
[tronyx@suladan ~]$ chmod +x ./DarkerNZBget.sh
[tronyx@suladan ~]$ sudo ./DarkerNZBget.sh -i docker -c nzbget
[sudo] password for tronyx:
Which icon color do you want? ([w]hite or [b]lack): b
Provided Docker container name is valid, continuing...
Downloading and extracting the Darker Nzbget theme CSS archive...
 _____           _             _   _  ____________            _
|  _  \         | |           | \ | ||___  /| ___ \          | |
| | | |__ _ _ __| | _____ _ __|  \| |   / / | |_/ / __ _  ___| |_
| | | / _` | '__| |/ / _ \ '__| . ` |  / /  | ___ \/ _` |/ _ \ __|
| |/ / (_| | |  |   <  __/ |  | |\  |./ /___| |_/ / (_| |  __/ |_
|___/ \__,_|_|  |_|\_\___|_|  \_| \_/\_____/\____/ \__, |\___|\__|
                                                    __/ |
                                                   |___/
Backing up the original style.css and icons.png files...
Installing the custom CSS and icons files...
Tidying some things up...
Validating that the DarkerNZBget theme was installed...
The DarkerNZBget theme has been successfully installed!
Please refresh your browser window/tab to see the new theme.
NOTE: You will need to run this script every time you recreate the container!