Support annotationProcessorPaths in DevMojo

core/deployment/src/main/java/io/quarkus/deployment/dev/CompilationProvider.java

@@ -52,6 +52,7 @@ class Context {
         private final List<String> compilerPluginOptions;
         private final boolean ignoreModuleInfo;
         private final File generatedSourcesDirectory;
+        private final Set<File> annotationProcessorPaths;
 
         public Context(
                 String name,
@@ -68,6 +69,7 @@ public Context(
                 List<String> compilePluginArtifacts,
                 List<String> compilerPluginOptions,
                 File generatedSourcesDirectory,
+                Set<File> annotationProcessorPaths,
                 String ignoreModuleInfo) {
             this.name = name;
             this.classpath = classpath;
@@ -84,6 +86,7 @@ public Context(
             this.compilerPluginOptions = compilerPluginOptions;
             this.ignoreModuleInfo = Boolean.parseBoolean(ignoreModuleInfo);
             this.generatedSourcesDirectory = generatedSourcesDirectory;
+            this.annotationProcessorPaths = annotationProcessorPaths;
         }
 
         public String getName() {
@@ -98,6 +101,10 @@ public Set<File> getReloadableClasspath() {
             return reloadableClasspath;
         }
 
+        public Set<File> getAnnotationProcessorPaths() {
+            return annotationProcessorPaths;
+        }
+
         public File getProjectDirectory() {
             return projectDirectory;
         }

core/deployment/src/main/java/io/quarkus/deployment/dev/DevModeContext.java

@@ -64,6 +64,8 @@ public class DevModeContext implements Serializable {
     private String baseName;
     private final Set<ArtifactKey> localArtifacts = new HashSet<>();
 
+    private Set<File> processorPaths;
+
     public boolean isLocalProjectDiscovery() {
         return localProjectDiscovery;
     }
@@ -239,6 +241,14 @@ public Set<ArtifactKey> getLocalArtifacts() {
         return localArtifacts;
     }
 
+    public void setAnnotationProcessorPaths(Set<File> processorPaths) {
+        this.processorPaths = processorPaths;
+    }
+
+    public Set<File> getAnnotationProcessorPaths() {
+        return processorPaths;
+    }
+
     public static class ModuleInfo implements Serializable {
 
         private static final long serialVersionUID = -1376678003747618410L;

core/deployment/src/main/java/io/quarkus/deployment/dev/JavaCompilationProvider.java

@@ -75,6 +75,7 @@ public void compile(Set<File> filesToCompile, CompilationProvider.Context contex
         final QuarkusFileManager.Context sourcesContext = new QuarkusFileManager.Context(
                 context.getClasspath(), context.getReloadableClasspath(),
                 context.getOutputDirectory(), context.getGeneratedSourcesDirectory(), 
+                context.getAnnotationProcessorPaths(),
                 context.getSourceEncoding(),
                 context.ignoreModuleInfo());
 

core/deployment/src/main/java/io/quarkus/deployment/dev/QuarkusCompiler.java

@@ -212,6 +212,7 @@ public void setupSourceCompilationContext(DevModeContext context,
                                 context.getCompilerPluginsOptions(),
                                 compilationUnit.getGeneratedSourcesPath() == null ? null
                                         : new File(compilationUnit.getGeneratedSourcesPath()),
+                                context.getAnnotationProcessorPaths(),
                                 context.getBuildSystemProperties().getOrDefault("quarkus.live-reload.ignore-module-info",
                                         "true")));
             }

core/deployment/src/main/java/io/quarkus/deployment/dev/QuarkusDevModeLauncher.java

@@ -181,6 +181,12 @@ public B compilerPluginOptions(List<String> options) {
             return (B) this;
         }
 
+        @SuppressWarnings("unchecked")
+        public B annotationProcessorPaths(Set<File> processorPaths) {
+            QuarkusDevModeLauncher.this.processorPaths = processorPaths;
+            return (B) this;
+        }
+
         @SuppressWarnings("unchecked")
         public B releaseJavaVersion(String releaseJavaVersion) {
             QuarkusDevModeLauncher.this.releaseJavaVersion = releaseJavaVersion;
@@ -317,6 +323,7 @@ public R build() throws Exception {
     private ModuleInfo main;
     private List<ModuleInfo> dependencies = new ArrayList<>(0);
     private LinkedHashMap<ArtifactKey, File> classpath = new LinkedHashMap<>();
+    private Set<File> processorPaths;
 
     protected QuarkusDevModeLauncher() {
     }
@@ -442,6 +449,9 @@ protected void prepare() throws Exception {
         if (compilerPluginOptions != null) {
             devModeContext.setCompilerPluginsOptions(compilerPluginOptions);
         }
+        if (processorPaths != null) {
+            devModeContext.setAnnotationProcessorPaths(processorPaths);
+        }
 
         devModeContext.setReleaseJavaVersion(releaseJavaVersion);
         devModeContext.setSourceJavaVersion(sourceJavaVersion);

core/deployment/src/main/java/io/quarkus/deployment/dev/filesystem/QuarkusFileManager.java

@@ -21,6 +21,9 @@ protected QuarkusFileManager(StandardJavaFileManager fileManager, Context contex
             if (context.getGeneratedSourcesDirectory() != null) {
                 this.fileManager.setLocation(StandardLocation.SOURCE_OUTPUT, List.of(context.getGeneratedSourcesDirectory()));
             }
+            if (context.getAnnotationProcessorPaths() != null) {
+                this.fileManager.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH, context.getAnnotationProcessorPaths());
+            }
         } catch (IOException e) {
             throw new RuntimeException("Cannot initialize file manager", e);
         }
@@ -35,6 +38,9 @@ public void reset(Context context) {
             if (context.getGeneratedSourcesDirectory() != null) {
                 this.fileManager.setLocation(StandardLocation.SOURCE_OUTPUT, List.of(context.getGeneratedSourcesDirectory()));
             }
+            if (context.getAnnotationProcessorPaths() != null) {
+                this.fileManager.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH, context.getAnnotationProcessorPaths());
+            }
         } catch (IOException e) {
             throw new RuntimeException("Cannot reset file manager", e);
         }
@@ -52,15 +58,22 @@ public static class Context {
         private final Charset sourceEncoding;
         private final boolean ignoreModuleInfo;
         private final File generatedSourcesDirectory;
+        private final Set<File> annotationProcessorPaths;
 
         public Context(Set<File> classPath, Set<File> reloadableClassPath,
-                File outputDirectory, File generatedSourcesDirectory, Charset sourceEncoding, boolean ignoreModuleInfo) {
+                File outputDirectory, File generatedSourcesDirectory, Set<File> annotationProcessorPaths, 
+                Charset sourceEncoding, boolean ignoreModuleInfo) {
             this.classPath = classPath;
             this.reloadableClassPath = reloadableClassPath;
             this.outputDirectory = outputDirectory;
             this.sourceEncoding = sourceEncoding;
             this.ignoreModuleInfo = ignoreModuleInfo;
             this.generatedSourcesDirectory = generatedSourcesDirectory;
+            this.annotationProcessorPaths = annotationProcessorPaths;
+        }
+
+        public Set<File> getAnnotationProcessorPaths() {
+            return annotationProcessorPaths;
         }
 
         public Set<File> getClassPath() {

devtools/maven/src/main/java/io/quarkus/maven/DevMojo.java

@@ -25,6 +25,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
@@ -43,6 +44,8 @@
 import org.aesh.terminal.utils.ANSI;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
+import org.apache.maven.artifact.handler.ArtifactHandler;
+import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
 import org.apache.maven.execution.MavenSession;
 import org.apache.maven.model.BuildBase;
 import org.apache.maven.model.Dependency;
@@ -267,6 +270,9 @@ public class DevMojo extends AbstractMojo {
     @Component
     private MavenVersionEnforcer mavenVersionEnforcer;
 
+    @Component
+    private ArtifactHandlerManager artifactHandlerManager;
+
     @Component
     private RepositorySystem repoSystem;
 
@@ -708,6 +714,73 @@ private void executeGoal(PluginExec pluginExec, String goal, Map<String, String>
                         pluginManager));
     }
 
+    private Set<File> readAnnotationProcessorPaths(Xpp3Dom pluginConfig) throws MojoExecutionException {
+        Xpp3Dom annotationProcessorPaths = pluginConfig.getChild("annotationProcessorPaths");
+        if (annotationProcessorPaths == null) {
+            return Collections.emptySet();
+        }
+        Xpp3Dom[] paths = annotationProcessorPaths.getChildren("path");
+        Set<File> elements = new LinkedHashSet<>();
+        try {
+            List<org.eclipse.aether.graph.Dependency> dependencies = convertToDependencies(paths);
+            CollectRequest collectRequest = new CollectRequest(dependencies, Collections.emptyList(),
+                    project.getRemoteProjectRepositories());
+            DependencyRequest dependencyRequest = new DependencyRequest();
+            dependencyRequest.setCollectRequest(collectRequest);
+            DependencyResult dependencyResult = repoSystem.resolveDependencies(session.getRepositorySession(),
+                    dependencyRequest);
+
+            for (ArtifactResult resolved : dependencyResult.getArtifactResults()) {
+                elements.add(resolved.getArtifact().getFile());
+            }
+            return elements;
+        } catch (Exception e) {
+            throw new MojoExecutionException(
+                    "Resolution of annotationProcessorPath dependencies failed: " + e.getLocalizedMessage(), e);
+        }
+    }
+
+    private List<org.eclipse.aether.graph.Dependency> convertToDependencies(Xpp3Dom[] paths) {
+        List<org.eclipse.aether.graph.Dependency> dependencies = new ArrayList<>();
+        for (Xpp3Dom path : paths) {
+            String type = getValue(path, "type", "jar");
+            ArtifactHandler handler = artifactHandlerManager.getArtifactHandler(type);
+            org.eclipse.aether.artifact.Artifact artifact = new DefaultArtifact(
+                    getValue(path, "groupId", null),
+                    getValue(path, "artifactId", null),
+                    getValue(path, "classifier", null),
+                    handler.getExtension(),
+                    getValue(path, "version", null));
+            Set<org.eclipse.aether.graph.Exclusion> exclusions = convertToAetherExclusions(path.getChild("exclusions"));
+            dependencies.add(new org.eclipse.aether.graph.Dependency(artifact, JavaScopes.RUNTIME, false, exclusions));
+        }
+        return dependencies;
+    }
+
+    private String getValue(Xpp3Dom path, String element, String defaultValue) {
+        Xpp3Dom child = path.getChild(element);
+        if (child == null) {
+            return defaultValue;
+        }
+        return child.getValue();
+    }
+
+    private Set<org.eclipse.aether.graph.Exclusion> convertToAetherExclusions(Xpp3Dom exclusions) {
+        if (exclusions == null) {
+            return Collections.emptySet();
+        }
+        Set<Exclusion> aetherExclusions = new HashSet<>();
+        for (Xpp3Dom exclusion : exclusions.getChildren("exclusion")) {
+            Exclusion aetherExclusion = new Exclusion(
+                    getValue(exclusion, "groupId", null),
+                    getValue(exclusion, "artifactId", null),
+                    getValue(exclusion, "classifier", null),
+                    getValue(exclusion, "extension", "jar"));
+            aetherExclusions.add(aetherExclusion);
+        }
+        return aetherExclusions;
+    }
+
     private boolean isGoalConfigured(Plugin plugin, String goal) {
         if (plugin == null) {
             return false;
@@ -1156,6 +1229,7 @@ private QuarkusDevModeLauncher newLauncher(Boolean debugPortOk, String bootstrap
         }
 
         setKotlinSpecificFlags(builder);
+        setAnnotationProcessorFlags(builder);
 
         // path to the serialized application model
         final Path appModelLocation = resolveSerializedModelLocation();
@@ -1406,6 +1480,36 @@ private void setKotlinSpecificFlags(MavenDevModeLauncher.Builder builder) {
         builder.compilerPluginOptions(options);
     }
 
+    private void setAnnotationProcessorFlags(MavenDevModeLauncher.Builder builder) {
+        Plugin compilerMavenPlugin = null;
+        for (Plugin plugin : project.getBuildPlugins()) {
+            if (plugin.getArtifactId().equals("maven-compiler-plugin")
+                    && plugin.getGroupId().equals("org.apache.maven.plugins")) {
+                compilerMavenPlugin = plugin;
+                break;
+            }
+        }
+
+        if (compilerMavenPlugin == null) {
+            return;
+        }
+
+        getLog().debug("Maven compiler plugin found, looking for annotation processors");
+
+        List<String> options = new ArrayList<>();
+        Xpp3Dom compilerPluginConfiguration = (Xpp3Dom) compilerMavenPlugin.getConfiguration();
+        try {
+            Set<File> processorPaths = this.readAnnotationProcessorPaths(compilerPluginConfiguration);
+            getLog().debug("Found processor paths: " + processorPaths);
+            if (!processorPaths.isEmpty()) {
+                builder.annotationProcessorPaths(processorPaths);
+            }
+        } catch (MojoExecutionException e) {
+            throw new RuntimeException(e);
+        }
+        builder.compilerPluginOptions(options);
+    }
+
     protected void modifyDevModeContext(MavenDevModeLauncher.Builder builder) {
 
     }