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# Automatically build, run unit and integration tests to detect errors early (CI provided by GitHub)

# including making pull requests review easier

# Human-readable name in the actions tab

name: Java CI

# Build on every push

# Wiki: https://help.github.com/en/actions/reference/events-that-trigger-workflows

on:

# Allow manual dispatches

workflow_dispatch:

push:

branches:

- main

env:

# temurin is the successor of adoptjdk

JDK_DISTRIBUTION: 'temurin'

JAVA_VERSION: 17

JIB_VERSION: '0.10.0'

JIB_CLI_DOWNLOAD: "https://github.com/GoogleContainerTools/jib/releases/download/v${{ env.JIB_VERSION }}-cli/jib-jre-${{ env.JIB_VERSION }}.zip"

JIB_CHECKSUM: '1b48fd04e73573bbf902c85dc1019c38ea4968dc0dbac4eb0658a2650ca5a18e'

BASE_IMAGE: 'gcr.io/distroless/java17-debian11:nonroot'

# https://paper.readthedocs.io/en/latest/server/aikar-flags.html

AIKAR_FLAGS: '-XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions

-XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M

-XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4

-XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90

-XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem

-XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs

-Daikars.new.flags=true'

JVM_FLAGS: '${{ env.AIKAR_FLAGS }} -server -XX:+ExitOnOutOfMemoryError'

jobs:

# job id

build_and_test:

# Environment image - always use the newest OS

runs-on: ubuntu-latest

# Run steps

steps:

- name: Checkout PaperBox

uses: actions/checkout@v3

# Pull changes

- name: Checkout Paper

uses: actions/checkout@v3

with:

repository: PaperMC/Paper

path: Paper

ref: master

# Cache only if the action is not run locally using act

# https://github.com/nektos/act/issues/285#issuecomment-987550101

- name: Set up JDK

uses: actions/setup-java@v3

if: ${{ !env.ACT }}

with:

distribution: ${{ env.JDK_DISTRIBUTION }}

java-version: ${{ env.JAVA_VERSION }}

cache: 'gradle'

# Setup Java

- name: Set up JDK

uses: actions/setup-java@v3

if: ${{ env.ACT }}

with:

distribution: ${{ env.JDK_DISTRIBUTION }}

java-version: ${{ env.JAVA_VERSION }}

- name: Download JIB

run: |

echo "Downloading JIB-Tool from ""$JIB_CLI_DOWNLOAD"

wget --timestamping "$JIB_CLI_DOWNLOAD"

# Security: verify the checksum with a pre-downloaded value to detect arbitary artifact replacement

# or in transport modifications (MITM)

echo "$JIB_CHECKSUM" "jib-jre-$JIB_VERSION.zip" | sha256sum --check -

unzip -f "jib-jre-$JIB_VERSION.zip"

- name: Patch and build

run: |

git config --global user.email "[email protected]"

git config --global user.name "Github Actions"

# Change to the submodule folder

cd Paper

./gradlew applyPatches --exclude-task test --exclude-task check --stacktrace

# Create a full paperclip build

./gradlew createReobfPaperclipJar --exclude-task test --exclude-task check --stacktrace

# stop daemon if both tasks are finished

./gradlew --stop

- name: Extract vars

run: |

echo "Extracting versions"

# Extract the Minecraft version

echo "MC_VERSION=$(grep --perl-regexp --only-matching '(?<=mcVersion=)[0-9]\.[0-9]{2}(\.[0-9]{1,2})?' Paper/gradle.properties)" >> "$GITHUB_ENV"

# Extract the Paper source code revision

echo "REVISION=$(git -C Paper/ rev-parse --short HEAD | grep --extended-regexp "[0-9a-z]{4,56}")" >> "$GITHUB_ENV"

# Extract the latest digest to include it in the metadata for reproducibility

# Skopeo enables us to extract the data without pulling the image and having the correct

# platform/architecture select. JIB will later download the image and uses it's own caching system

echo "DIGEST=$(skopeo inspect docker://""$BASE_IMAGE"" | jq --raw-output '.Digest' | grep --extended-regexp "sha256:[a-z0-9]{64}")" >> "$GITHUB_ENV"

#echo "DIGEST=sha256:ec587f786019d4e5226f6f8c7485ca1ef5df6fd7f029ed1cffa8466c91d84fc4" >> $GITHUB_ENV

- name: Extract jar

run: |

# Create dummy directory for the permission bug in JIB

mkdir -p Paper/build/libs/temp/dummy

unzip Paper/build/libs/paper-paperclip*.jar -d Paper/build/libs/temp/clip

unzip Paper/build/libs/paper-bundler*.jar -d Paper/build/libs/temp/bundler

- name: Build Container

run: |

apt update && apt install gettext-base

export CREATED=$(date -u +'%Y-%m-%dT%H:%M:%SZ')

# Create build file from an allow list of variables

# Note the variables are not expanded here - see ' instead of "

envsubst '$BASE_IMAGE:$DIGEST:$CREATED:$JVM_FLAGS:$REVISION:$MC_VERSION' < abstract-jib.yaml > jib.yaml

./jib-"$JIB_VERSION"/bin/jib build \

--additional-tags="$MC_VERSION" \

--target docker://ghcr.io/games647/paperclip