Add an integration test that spins up a server

.github/workflows/java.yml

@@ -0,0 +1,24 @@
+name: java
+
+on:
+  pull_request:
+
+jobs:
+  integration:
+    name: integration
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: corretto
+          java-version: 8
+      - uses: gradle/actions/setup-gradle@v4
+      - run: ./gradlew build
+      - run: rustup update stable && rustup default stable
+      - run: |
+          cd rgen
+          cargo build -p rgen-jni-impl -p rgen-jni --release
+      - run: ./setup-server.sh
+      - run: ./start-server.sh

.github/workflows/ci.yml → .github/workflows/rust.yml

@@ -1,9 +1,9 @@
-name: rust build
+name: rust
 
 on:
   pull_request:
 
-env: 
+env:
   CARGO_TERM_COLOR: always
 
 jobs:
@@ -19,8 +19,8 @@ jobs:
           # Only check libs to avoid building `rgen-viewer`.
           cargo clippy --lib -- -D warnings
 
-  test:
-    name: test
+  unit:
+    name: unit
     runs-on: ubuntu-latest
 
     steps:

.gitignore

@@ -28,3 +28,5 @@ forge*changelog.txt
 /.keys
 
 .DS_Store
+
+/server

setup-server.sh

@@ -0,0 +1,23 @@
+set -e
+
+rm -rf server
+mkdir -p server
+cd server
+
+mkdir mods
+ln -s ../../build/libs/rgen-1.0.jar mods
+
+mkdir natives
+ln -s ../../rgen/target/release/librgen_jni.so natives
+
+FORGE_VERSION=1.12.2-14.23.5.2860
+
+curl -o forge-installer.jar https://maven.minecraftforge.net/net/minecraftforge/forge/$FORGE_VERSION/forge-$FORGE_VERSION-installer.jar
+java -jar forge-installer.jar --installServer .
+echo "eula=true" > eula.txt
+
+cat > server.properties <<EOF
+allow-flight=true
+level-seed=1
+level-type=rgen
+EOF

start-server.sh

@@ -0,0 +1,28 @@
+set -e
+
+if [ ! -d server ]; then
+  echo "Server directory not found, set it up with setup-server.sh"
+  exit 1
+fi
+
+cd server
+rm -rf world
+
+readlink mods/rgen-1.0.jar > /dev/null || ret=$?
+if [[ $ret -eq 1 ]]; then
+  echo "Mod not found, compile it first"
+  exit 1
+fi
+readlink natives/librgen_jni.so > /dev/null || ret=$?
+if [[ $ret -eq 1 ]]; then
+  echo "Native library not found, compile it first"
+  exit 1
+fi
+
+FORGE_VERSION=1.12.2-14.23.5.2860
+
+java \
+  -Dfml.queryResult=confirm \
+  -Djava.library.path=natives \
+  -jar forge-$FORGE_VERSION.jar \
+  nogui