yukkit

#!/usr/bin/env bash

set -eux

paper_url=https://github.com/PaperMC/Paper.git
paper_ref=ver/1.12.2
paper_remote=origin

fetch() {
  (
    if [ ! -d modules/Paper ]; then
      git clone $paper_url modules/Paper
    else
      cd modules/Paper \
        && git fetch $paper_remote $paper_ref
    fi
  ) || (
    echo 'Failed to fetch from upstream. (Paper)'
    exit 1
  )
}

x_patch_git() {
  local dir=${1:?} \
    && mkdir -p "$dir" \
    && find "$dir" -mindepth 1 -maxdepth 1 -type f -iname '*.patch' -print0 | xargs -0 git am -3
}

x_patch_paper() {
  (
    x_patch_paper_cleanup
  ) && (
    cd modules/Paper \
      && x_patch_git ../../patches/Paper \
      && ./paper patch
  )
}

x_patch_paper_cleanup() {
  (
    cd modules/Paper \
      && git switch -f -C ver/1.12.2 $paper_remote/$paper_ref \
      && echo 'Cleanup success!'
  )
}

patch() {
  (
    x_patch_paper
  ) || (
    echo 'Failed to apply Yukkit patches.'
    exit 1
  )
}

x_save_git() {
  (
    local repo=${1:?} \
      && local ref=${2:?} \
      && local to=${3:?} \
      && cd "$repo" \
      && rm -rf "$to" \
      && mkdir -p "$to" \
      && git format-patch -o "$to" -pN --zero-commit "$ref"
  )
}

save() {
  (
    x_save_git modules/Paper $paper_remote/$paper_ref ../../patches/Paper \
      && x_save_git modules/Yukkit-API upstream/upstream ../../patches/Yukkit-API \
      && x_save_git modules/Yukkit-Server upstream/upstream ../../patches/Yukkit-Server
  ) || (
    echo 'Failed to save Yukkit patches.'
    exit 1
  )
}

build() {
  ./gradlew --console=plain shadowJar
}

clip() {
  mvn -B \
    -f modules/Paper/work/Paperclip/pom.xml \
    -Dmcver=1.12.2 \
    -Dpaperjar=../../../../Yukkit-Server/build/libs/Yukkit-Server-1.12.2-R0.1-SNAPSHOT-all.jar \
    -Dvanillajar=../../Minecraft/1.12.2/1.12.2.jar \
    clean package \
    && cp -v modules/Paper/work/Paperclip/assembly/target/paperclip-1.12.2.jar Yukkit.jar
}

jar() {
  fetch
  patch
  build
  clip
}

usage() {
  echo -e "Usage >> \e[1;31m$0 [ fetch | patch | build | clip | jar | save ]\e[m"
}

case "${1-}" in
  fetch | load | init ) fetch ;;
  patch | apply ) patch ;;
  build ) build ;;
  clip ) clip ;;
  jar ) jar ;;
  save ) save ;;
  *) usage ;;
esac