rep-container

#! /usr/bin/env bash

########################################################################################

BOLD=1
RED=31

################################################################################

# Official container image (String)
IMAGE="ghcr.io/essentialkaos/rep:latest"

# Path to working dir (String)
WORKDIR="${REP_DIR:-/opt/rep}"

################################################################################

engine=""

################################################################################

# Main function
#
# Code: No
# Echo: No
main() {
  engine=$(getContainerEngine)

  checkEnv
  prepareEnv

  $engine run -it --rm -v "$WORKDIR":'/rep' -v "$(pwd)":'/input' "$IMAGE" "$@"
}

# Check environment
#
# Code: No
# Echo: No
checkEnv() {
  if [[ -z "$engine" ]] ; then
    error "You must install Podman or Docker runtime first"
    exit 1
  fi

  if [[ ! -e "$WORKDIR" ]] ; then
    error "Working directory \"$WORKDIR\" doesn't exist"
    exit 1
  fi

  if [[ ! -d "$WORKDIR" ]] ; then
    error "\"$WORKDIR\" is not directory"
    exit 1
  fi

  if [[ ! -w "$WORKDIR" ]] ; then
    error "Working directory \"$WORKDIR\" is not writable"
    exit 1
  fi

  if [[ ! -r "$WORKDIR" ]] ; then
    error "Working directory \"$WORKDIR\" is not readable"
    exit 1
  fi
}

# Prepare environment for running image
#
# Code: No
# Echo: No
prepareEnv() {
  if ! isImageDownloaded ; then
    show "Downloading official rep image…\n" $BOLD
    $engine pull "$IMAGE"
  fi

  if [[ ! -e "$WORKDIR/conf" ]] ; then
    mkdir "$WORKDIR/conf"
  fi

  if [[ ! -e "$WORKDIR/data" ]] ; then
    mkdir "$WORKDIR/data"
  fi

  if [[ ! -e "$WORKDIR/cache" ]] ; then
    mkdir "$WORKDIR/cache"
  fi

  if [[ ! -e "$WORKDIR/logs" ]] ; then
    mkdir "$WORKDIR/logs"
  fi
}

# Check if container image is downloaded or not
#
# Code: Yes
# Echo: No
isImageDownloaded() {
  if [[ -z "$($engine images -q $IMAGE 2> /dev/null)" ]] ; then
    return 1
  fi

  return 0
}

# Check if some app is installed
#
# 1: Binary name (String)
#
# Code: Yes
# Echo: No
hasApp() {
  type "$1" &> /dev/null
  return $?
}

# Show message
#
# 1: Message (String)
# 2: Message color (Number) [Optional]
#
# Code: No
# Echo: No
show() {
  if [[ -n "$2" ]] ; then
    echo -e "\e[${2}m${1}\e[0m"
  else
    echo -e "$*"
  fi
}

# Print error message
#
# 1: Message (String)
# 2: Message color (Number) [Optional]
#
# Code: No
# Echo: No
error() {
  show "$*" $RED 1>&2
}

################################################################################

main "$@"