#!/bin/bash
set -e

usage="$(basename "$0") [--release=<version>] [--publish] [-h] 

Compile Caddy server with gitea-pages plugin inside docker container. Buy 
default local sources will be used for build.

You can also compile known release. The given release tag will be fetched from
the project git repo at https://gitea.djmil.dev/djmil/gitea-pages.

Optionally, the script can be used to publish resulting docker image to the
https://hub.docker.com/repository/docker/djmil/gitea-pages.

Params for the short options version shall be separated by space. For the long
options - equal sign shall be used. Example:
    --release=0.1.0
    -r 0.0.1

Where:
    -l | --local
        Build local sources. Default behaviour.

    -r | --release  <version>
        A major.minor.patch tag of the known release to build.

    -p | --publish
        Publish resulting image to the docker hub. Typically shall be used 
        together with --release option. 

    -h | --help
        Show this message and exit.
"

R="\033[0;31m" # RED
G="\033[0;32m" # GREEN
Y="\033[0;33m" # YELLOW
B="\033[1;34m" # BLUE
NC="\033[0;0m" # NO COLOR

###############################################################################
# Parse long and short options, source:    https://stackoverflow.com/a/28466267

# Defaults
tag='local'
publish=false

die() { echo "$*" >&2; exit 2; }       # complain to STDERR and exit with error
needs_arg() { if [ -z "$OPTARG" ]; then die "No arg for --$OPT option"; fi; }

while getopts r:lph-: OPT; do  # allow -a, -b with arg, -c, and -- "with arg"
  # support long options:       https://stackoverflow.com/a/28466267/519360
  if [ "$OPT" = "-" ]; then     # long option: reformulate OPT and OPTARG
    OPT="${OPTARG%%=*}"         # extract long option name
    OPTARG="${OPTARG#"$OPT"}"   # extract long option argument (may be empty)
    OPTARG="${OPTARG#=}"        # if long option argument, remove assigning `=`
  fi
  case "$OPT" in
    l | local )    tag='local' ;;
    r | release )  needs_arg; tag="$OPTARG" ;;
    p | publish )  publish=true ;;
    h | help )     echo "$usage" >&2; exit 0 ;;
    \? )           exit 2 ;;    # bad short option (error reported via getopts)
    * )            die "Illegal option --$OPT" ;;             # bad long option
  esac
done
shift $((OPTIND-1))               # remove parsed options and args from $@ list
###############################################################################


if [ $tag = 'local' ]; then
    echo -e "${Y} -->> Local dev-mode build: compile local sources${NC}";
    
    docker build \
        --file docker/local.dockerfile \
        --tag djmil/gitea-pages:local \
        .
    
    exit 0
fi


echo -e "${Y} -->> Building release ${B}'$tag'${NC}";

docker build \
    --file docker/release.dockerfile \
    --build-arg RELEASE=$tag \
    --tag djmil/gitea-pages:$tag \
    .


if $publish; then
    echo -e "${Y} -->> Publishing to the dockerhub";

    docker login --username djmil #--password-stdin

    docker push djmil/gitea-pages:$tag
fi