Initial commit

.gitignore

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+*~
+.*~
+

.gitlab-ci.yml

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+image: docker:stable
+
+stages:
+        - build
+
+variables:
+        IMAGE_NAME: registry.gitlab.com/wolutator/bukkit-docker
+
+build:
+        stage: build
+        tags:
+                - hottis
+                - linux
+                - docker
+        script: 
+                - VERSION=`cat VERSION`
+                - echo "Version is $VERSION"
+                - docker build --build-arg BUKKIT_VERSION=$VERSION --tag $IMAGE_NAME:latest --tag $IMAGE_NAME:$VERSION .
+                - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+                - docker push $IMAGE_NAME:latest
+                - docker push $IMAGE_NAME:$VERSION
+

Dockerfile

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+FROM openjdk:8u242-jdk-buster
+
+LABEL Maintainer="Wolfgang Hottgenroth <wolfgang.hottgenroth@icloud.com>"
+LABEL ImageName="registry.gitlab.com/wolutator/bukkit-docker"
+LABEL AlternativeImageName="wollud1969/bukkit-docker"
+
+ARG BUKKIT_VERSION
+ARG BUILD_DIR=/minecraft-build
+ARG APP_DIR=/minecraft
+ARG USER=minecraft
+ARG UID=25565
+
+RUN \
+  mkdir $BUILD_DIR && cd $BUILD_DIR && \
+  wget -O BuildTools.jar https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar && \
+  java -jar BuildTools.jar --rev $BUKKIT_VERSION && \
+  mkdir $APP_DIR && cd $APP_DIR && \  
+  cp $BUILD_DIR/spigot-*.jar $APP_DIR/spigot.jar && \
+  useradd -d $APP_DIR -u $UID $USER
+
+VOLUME /data
+EXPOSE 25565
+WORKDIR /data
+USER $UID:$UID
+
+CMD [ "java", "-jar", "$APP_DIR/spigot.jar" ]
+

VERSION

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+1.15.2