Open source @AutoService KSP processor as auto-service-ksp.

.github/workflows/ci.yml

@@ -45,7 +45,13 @@ jobs:
         run: mvn -B dependency:go-offline test clean -U --quiet --fail-never -DskipTests=true -f build-pom.xml
       - name: 'Test'
         shell: bash
-        run: mvn -B verify -U --fail-at-end -Dsource.skip=true -Dmaven.javadoc.skip=true -f build-pom.xml
+        # One of the auto-service-ksp test deps was built targeting JDK 11, so we skip its tests
+        # here and only run them on JDK 11+ in the next step.
+        run: mvn -B verify -U --fail-at-end -Dsource.skip=true -Dmaven.javadoc.skip=true -pl '!service/processor_ksp' -f build-pom.xml
+      - name: 'Test auto-service-ksp'
+        if: ${{ matrix.java >= 11 }}
+        shell: bash
+        run: mvn -B verify -U --fail-at-end -Dsource.skip=true -Dmaven.javadoc.skip=true -f service/pom.xml
 
   publish_snapshot:
     name: 'Publish snapshot'

service/pom.xml

@@ -62,25 +62,19 @@
   <modules>
     <module>annotations</module>
     <module>processor</module>
+    <module>processor_ksp</module>
   </modules>
 
   <dependencyManagement>
     <dependencies>
       <!-- main dependencies -->
-
       <dependency>
         <groupId>com.google.guava</groupId>
         <artifactId>guava</artifactId>
         <version>${guava.version}</version>
       </dependency>
-      <dependency>
-        <groupId>com.google.guava</groupId>
-        <artifactId>guava-gwt</artifactId>
-        <version>${guava.version}</version>
-      </dependency>
 
       <!-- test dependencies -->
-
       <dependency>
         <groupId>com.google.testing.compile</groupId>
         <artifactId>compile-testing</artifactId>

service/processor/src/main/java/com/google/auto/service/processor/AutoServiceProcessor.java

@@ -19,17 +19,20 @@
 import static com.google.auto.common.MoreElements.getAnnotationMirror;
 import static com.google.common.base.Throwables.getStackTraceAsString;
 import static com.google.common.collect.ImmutableSet.toImmutableSet;
+import static java.nio.charset.StandardCharsets.UTF_8;
 
 import com.google.auto.common.MoreElements;
 import com.google.auto.common.MoreTypes;
 import com.google.auto.service.AutoService;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.SortedSetMultimap;
 import com.google.common.collect.TreeMultimap;
+import java.io.BufferedWriter;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.io.OutputStreamWriter;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -85,7 +88,7 @@
 
   @Override
   public ImmutableSet<String> getSupportedAnnotationTypes() {
     return ImmutableSet.of(AutoService.class.getName());
   }
 
   @Override
@@ -94,8 +97,6 @@
   }
 
   /**
-   *
-   *
    * <ol>
    *   <li>For each class annotated with {@link AutoService}
    *       <ul>
@@ -140,7 +141,7 @@
   private void processAnnotations(
       Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
 
     Set<? extends Element> elements = roundEnv.getElementsAnnotatedWith(AutoService.class);
 
     log(annotations.toString());
     log(elements.toString());
@@ -148,7 +149,7 @@
     for (Element e : elements) {
       // TODO(gak): check for error trees?
       TypeElement providerImplementer = MoreElements.asType(e);
       AnnotationMirror annotationMirror = getAnnotationMirror(e, AutoService.class).get();
       ImmutableSet<DeclaredType> providerInterfaces = getValueFieldOfClasses(annotationMirror);
       if (providerInterfaces.isEmpty()) {
         error(MISSING_SERVICES_ERROR, e, annotationMirror);
@@ -186,8 +187,13 @@
         log("New service file contents: " + newServices);
         FileObject fileObject =
             filer.createResource(StandardLocation.CLASS_OUTPUT, "", resourceFile);
-        try (OutputStream out = fileObject.openOutputStream()) {
-          ServicesFiles.writeServiceFile(newServices, out);
+        try (OutputStream out = fileObject.openOutputStream();
+            OutputStreamWriter writer = new OutputStreamWriter(out, UTF_8);
+            BufferedWriter buffered = new BufferedWriter(writer)) {
+          for (String service : newServices) {
+            buffered.write(service);
+            buffered.write('\n');
+          }
         }
         log("Wrote to: " + resourceFile);
       } catch (IOException e) {

service/processor_ksp/pom.xml

@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Copyright 2013 Google LLC
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>com.google.auto.service</groupId>
+    <artifactId>auto-service-aggregator</artifactId>
+    <version>HEAD-SNAPSHOT</version>
+  </parent>
+
+  <groupId>com.google.auto.service</groupId>
+  <artifactId>auto-service-ksp</artifactId>
+  <version>HEAD-SNAPSHOT</version>
+  <name>AutoService KSP Processor</name>
+  <description>
+    KSP processor for generating ServiceLoader provider configuration files.
+  </description>
+  <url>https://github.com/google/auto/tree/main/service</url>
+
+  <scm>
+    <url>http://github.com/google/auto</url>
+    <connection>scm:git:git://github.com/google/auto.git</connection>
+    <developerConnection>scm:git:ssh://git@github.com/google/auto.git</developerConnection>
+    <tag>HEAD</tag>
+  </scm>
+
+  <properties>
+    <maven.compiler.release>${java.version}</maven.compiler.release>
+    <kotlin.version>2.4.10</kotlin.version>
+    <kotlin.compiler.languageVersion>2.0</kotlin.compiler.languageVersion>
+    <kotlin.compiler.apiVersion>2.0</kotlin.compiler.apiVersion>
+    <kotlin.compiler.jdkRelease>${java.version}</kotlin.compiler.jdkRelease>
+  </properties>
+
+  <repositories>
+    <!-- needed for room3-compiler-processing-testing -->
+    <repository>
+      <id>google</id>
+      <url>https://maven.google.com/</url>
+    </repository>
+  </repositories>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.google.auto.service</groupId>
+      <artifactId>auto-service-annotations</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.devtools.ksp</groupId>
+      <artifactId>symbol-processing-api</artifactId>
+      <version>2.3.11</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+    </dependency>
+    <!-- test dependencies -->
+    <dependency>
+      <groupId>androidx.room3</groupId>
+      <artifactId>room3-compiler-processing-testing</artifactId>
+      <version>3.0.1</version>
+      <scope>test</scope>
+      <exclusions>
+        <!--
+          room3-compiler-processing-testing declares a dependency on symbol-processing:jar, but the
+          symbol-processing artifact is (now, at any rate) just a pom with no jar. Simply excluding
+          the dep seems to make everything work fine.
+          -->
+        <exclusion>
+          <groupId>com.google.devtools.ksp</groupId>
+          <artifactId>symbol-processing</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.truth</groupId>
+      <artifactId>truth</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <!-- the KSP test actually tests the JAPT processor as well -->
+    <dependency>
+      <groupId>com.google.auto.service</groupId>
+      <artifactId>auto-service</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <!-- setting these explicitly just prevents warnings about no src/(main|test)/java dirs -->
+    <sourceDirectory>src/main/kotlin</sourceDirectory>
+    <testSourceDirectory>src/test/kotlin</testSourceDirectory>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.jetbrains.kotlin</groupId>
+        <artifactId>kotlin-maven-plugin</artifactId>
+        <version>${kotlin.version}</version>
+        <extensions>true</extensions>
+      </plugin>
+    </plugins>
+  </build>
+</project>