ci: rewrite java ci

.github/workflows/java.yml

@@ -23,30 +23,44 @@ jobs:
             filename: codemp.dll
           - runner: macos-14
             target: darwin-arm64
-            filename: codemp.dylib
+            filename: libcodemp.dylib
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: arduino/setup-protoc@v3
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
+      - run: cargo build --release --features=java
+      - uses: actions/upload-artifact@v4
+        with:
+          name: codemp-java-${{ matrix.platform.target }}
+          path: target/release/${{ matrix.platform.filename }}
+
+  publish:
+    needs: [build]
+    runs-on: ubuntu-latest 
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist/java/artifacts
+          pattern: codemp-java-*
+          merge-multiple: true
+      - run: tree
+        working-directory: dist/java
       - uses: actions/setup-java@v4
         with:
             distribution: 'temurin'
             java-version: '11'
       - uses: gradle/actions/setup-gradle@v4
         with:
-          gradle-version: "8.10" # Quotes required to prevent YAML converting to number
-      - run: gradle build
+          gradle-version: "8.10"
         working-directory: dist/java
-      - uses: actions/upload-artifact@v4
-        with:
-          name: codemp-java-${{ matrix.platform.target }}
-          path: dist/java/build/libs
       - run: gradle publish
         working-directory: dist/java
         env:
           ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.MAVEN_CENTRAL_USERNAME }}
           ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}
           ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.MAVEN_CENTRAL_GPG_SECRET_KEY }}
           ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.MAVEN_CENTRAL_GPG_PASSWORD }}
+

.gitignore

@@ -28,6 +28,7 @@ dist/java/.gradle/
 dist/java/.project
 dist/java/.settings/
 dist/java/bin/
+dist/java/artifacts/
 
 # intellij insists on creating the wrapper every time even if it's not strictly necessary
 dist/java/gradle/

dist/README.md

@@ -33,14 +33,20 @@ Thus, we also provide pre-made Java glue code, wrapping all native calls and def
 
 The Java bindings have no known major quirk. However, here are a list of facts that are useful to know when developing with these:
 
-* Memory management is entirely delegated to the JVM's garbage collector.
-  * A more elegant solution than `Object.finalize()`, who is deprecated in newer Java versions, may be coming eventually.
+* Memory management is entirely delegated to the JVM's garbage collector using the `Cleaner` API.
+  * Because of this, we require Java 11 as minimum version: `Cleaner` was added in version 9. This should not be a problem, as IDEs tend to run on recent versions, but if there is actual demand for it we may add a Java 8-friendly version using `Object.finalize()` (which is deprecated in modern JDKs).
 * Exceptions coming from the native side have generally been made checked to imitate Rust's philosophy with `Result`.
   * `JNIException`s are however unchecked: there is nothing you can do to recover from them, as they usually represent a severe error in the glue code. If they arise, it's probably a bug.
 
 ### Using
-`codemp` **will be available soon** as an artifact on [Maven Central](https://mvnrepository.com)
+`codemp` is available on [Maven Central](https://central.sonatype.com/artifact/mp.code/codemp), with each officially supported OS as an archive classifier.
 
 ### Building
-This is a [Gradle](https://gradle.org/) project: building requires having both Gradle and Cargo installed, as well as the JDK (any non-abandoned version).
-Once you have all the requirements, building is as simple as running `gradle build`: the output is going to be a JAR under `build/libs`, which you can import into your classpath with your IDE of choice.
+> [!NOTE]
+> The following instructions assume `dist/java` as current working directory.
+
+This is a [Gradle](https://gradle.org/) project, so you must have install `gradle` (as well as JDK 11 or higher) in order to build it.
+- You can build a JAR without bundling the native library with `gradle build`.
+- Otherwise, you can compile the project for your current OS and create a JAR that bundles the resulting binary with `gradle nativeBuild`; do note that this second way of building also requires Cargo and the relevant Rust toolchain.
+
+In both cases, the output is going to be a JAR under `build/libs`, which you can import into your classpath with your IDE of choice.

dist/java/build.gradle

@@ -1,14 +1,104 @@
 plugins {
 	id 'java-library'
-	id "com.vanniktech.maven.publish" version "0.29.0"
+	id "com.vanniktech.maven.publish.base" version "0.30.0"
 	id 'com.google.osdetector' version '1.7.3'
 }
 
 group = 'mp.code'
 version = '0.7.3'
 
+tasks.register('windowsJar', Jar) {
+	outputs.upToDateWhen { false }
+	archiveClassifier = 'windows-x86_64'
+	from sourceSets.main.runtimeClasspath
+	from('artifacts') {
+		include('*.dll')
+		into('natives/')
+	}
+	doFirst {
+		if(!(new File('artifacts/codemp.dll').exists())) {
+			throw new GradleException("The required file does not exist!")
+		}
+	}
+}
+
+tasks.register('macosJar', Jar) {
+	outputs.upToDateWhen { false }
+	archiveClassifier = 'osx-aarch_64'
+	from sourceSets.main.runtimeClasspath
+	from('artifacts') {
+		include('*.dylib')
+		into('natives/')
+	}
+	doFirst {
+		if(!(new File('artifacts/libcodemp.dylib').exists())) {
+			throw new GradleException("The required file does not exist!")
+		}
+	}
+}
+
+tasks.register('linuxJar', Jar) {
+	outputs.upToDateWhen { false }
+	archiveClassifier = 'linux-x86_64'
+	from sourceSets.main.runtimeClasspath
+	from('artifacts') {
+		include('*.so')
+		into('natives/')
+	}
+	doFirst {
+		if(!(new File('artifacts/libcodemp.so').exists())) {
+			throw new GradleException("The required file does not exist! Maybe you need to `cargo build` the main library first?")
+		}
+	}
+}
+
+tasks.register('multiplatformJar', Jar) {
+	outputs.upToDateWhen { false }
+	archiveClassifier = 'all'
+	from sourceSets.main.runtimeClasspath
+	from('artifacts') {
+		include('*')
+		into('natives/')
+	}
+}
+
+configurations {
+	windowsJar {
+		canBeConsumed = true
+		canBeResolved = false
+		extendsFrom implementation, runtimeOnly
+	}
+	linuxJar {
+		canBeConsumed = true
+		canBeResolved = false
+		extendsFrom implementation, runtimeOnly
+	}
+	macosJar {
+		canBeConsumed = true
+		canBeResolved = false
+		extendsFrom implementation, runtimeOnly
+	}
+	multiplatformJar {
+		canBeConsumed = true
+		canBeResolved = false
+		extendsFrom implementation, runtimeOnly
+	}
+}
+
 java {
 	sourceCompatibility = targetCompatibility = JavaVersion.VERSION_11
+	withSourcesJar()
+	withJavadocJar()
+}
+
+artifacts {
+	archives jar
+	archives sourcesJar
+	archives javadocJar
+	windowsJar(windowsJar)
+	macosJar(macosJar)
+	linuxJar(linuxJar)
+	multiplatformJar(multiplatformJar)
 }
 
 repositories {
@@ -29,17 +119,17 @@ tasks.register('cargoBuild', Exec) {
 	commandLine 'cargo', 'build', '--release', '--features=java'
 }
 
-jar.archiveClassifier = osdetector.classifier
-
 def rustDir = projectDir.toPath()
 	.parent
 	.parent
 	.resolve('target')
 	.resolve('release')
 	.toFile()
-processResources {
+
+tasks.register('nativeBuild', Jar) {
+	archiveClassifier = osdetector.classifier
 	dependsOn cargoBuild
-	outputs.upToDateWhen { false } // no caching
+	from sourceSets.main.runtimeClasspath
 	from(rustDir) {
 		include('*.dll')
 		include('*.so')
@@ -48,9 +138,23 @@ processResources {
 	}
 }
 
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			artifact jar
+			artifact sourcesJar
+			artifact javadocJar
+			artifact windowsJar
+			artifact linuxJar
+			artifact macosJar
+			artifact multiplatformJar
+		}
+	}
+}
+
 import com.vanniktech.maven.publish.SonatypeHost
 mavenPublishing {
-	publishToMavenCentral(SonatypeHost.CENTRAL_PORTAL, true)
+	publishToMavenCentral(SonatypeHost.CENTRAL_PORTAL, true) 
 	signAllPublications()
 	coordinates(project.group, rootProject.name, project.version)
 

dist/java/src/mp/code/BufferController.java

@@ -70,6 +70,7 @@ public BufferUpdate recv() throws ControllerException {
 
 	/**
 	 * Tries to send a {@link TextChange} update.
+	 * @param change the update to send
 	 * @throws ControllerException if the controller was stopped
 	 */
 	public void send(TextChange change) throws ControllerException {
@@ -81,6 +82,8 @@ public void send(TextChange change) throws ControllerException {
 	/**
 	 * Registers a callback to be invoked whenever a {@link BufferUpdate} occurs.
 	 * This will not work unless a Java thread has been dedicated to the event loop.
+	 * @param cb a {@link Consumer} that receives the controller when the change occurs;
+	 *           you should probably spawn a new thread in here, to avoid deadlocking
 	 * @see Extensions#drive(boolean)
 	 */
 	public void callback(Consumer<BufferController> cb) {

dist/java/src/mp/code/CursorController.java

@@ -43,21 +43,24 @@ public Cursor recv() throws ControllerException {
 		return recv(this.ptr);
 	}
 
-	private static native void send(long self, Selection cursor) throws ControllerException;
+	private static native void send(long self, Selection selection) throws ControllerException;
 
 	/**
 	 * Tries to send a {@link Selection} update.
+	 * @param selection the update to send
 	 * @throws ControllerException if the controller was stopped
 	 */
-	public void send(Selection cursor) throws ControllerException {
-		send(this.ptr, cursor);
+	public void send(Selection selection) throws ControllerException {
+		send(this.ptr, selection);
 	}
 
 	private static native void callback(long self, Consumer<CursorController> cb);
 
 	/**
 	 * Registers a callback to be invoked whenever a {@link Cursor} update occurs.
 	 * This will not work unless a Java thread has been dedicated to the event loop.
+	 * @param cb a {@link Consumer} that receives the controller when the change occurs;
+	 *           you should probably spawn a new thread in here, to avoid deadlocking
 	 * @see Extensions#drive(boolean)
 	 */
 	public void callback(Consumer<CursorController> cb) {

dist/java/src/mp/code/Extensions.java

@@ -33,7 +33,7 @@ public final class Extensions {
 	 * <p>
 	 * You may alternatively call this with true, in a separate and dedicated Java thread;
 	 * it will remain active in the background and act as event loop. Assign it like this:
-	 * <p><code>new Thread(() -> Extensions.drive(true)).start();</code></p>
+	 * <p><code>new Thread(() -&gt; Extensions.drive(true)).start();</code></p>
 	 * @param block true if it should use the current thread
 	 */
 	public static native void drive(boolean block);

dist/java/src/mp/code/Workspace.java

@@ -196,6 +196,8 @@ public Event recv() throws ControllerException {
 	/**
 	 * Registers a callback to be invoked whenever a new {@link Event} is ready to be received.
 	 * This will not work unless a Java thread has been dedicated to the event loop.
+	 * @param cb a {@link Consumer} that receives the controller when the change occurs;
+	 *           you should probably spawn a new thread in here, to avoid deadlocking
 	 * @see Extensions#drive(boolean)
 	 */
 	public void callback(Consumer<Workspace> cb) {

dist/java/src/mp/code/data/TextChange.java

@@ -3,9 +3,6 @@
 import lombok.EqualsAndHashCode;
 import lombok.RequiredArgsConstructor;
 import lombok.ToString;
-import mp.code.Extensions;
-
-import java.util.OptionalLong;
 
 /**
  * A data class holding information about a text change.

dist/java/src/mp/code/exceptions/ControllerException.java

@@ -2,8 +2,8 @@
 
 /**
  * An exception that may occur when a {@link mp.code.BufferController} or
- * a {@link mp.code.CursorController} perform an illegal operation.
- * It may also occur as a result of {@link mp.code.Workspace#event()}.
+ * a {@link mp.code.CursorController} or {@link mp.code.Workspace} (in the
+ * receiver part) perform an illegal operation.
  */
 public abstract class ControllerException extends Exception {