Support AspectJ in Gradle projects

Author: snjeza

org.eclipse.jdt.ls.core/gradle/aspectj/init.gradle

@@ -0,0 +1,73 @@
+import org.gradle.plugins.ide.eclipse.model.EclipseModel
+
+gradle.projectsEvaluated { g ->
+	if (System.getProperty("eclipse.application") == null) return
+	def weavingPluginId = "io.freefair.aspectj.post-compile-weaving"
+	def allprojects = g.rootProject.allprojects
+	boolean hasWeaving = allprojects.any { it.plugins.hasPlugin(weavingPluginId) }
+	allprojects.each { p ->
+		if (p.plugins.hasPlugin("eclipse")) {
+			EclipseModel eclipseModel = (EclipseModel) p.property("eclipse")
+			if (hasWeaving) {
+				if (GradleVersion.version(p.getGradle().getGradleVersion()) >= GradleVersion.version("5.4")) {
+					try {
+						try {
+							Task task = p.getTasks().getByName("classes")
+							eclipseModel.synchronizationTasks "classes"
+						} catch (UnknownTaskException e) {
+							// ignore
+						}
+					} catch (Exception e) {
+						// ignore
+					}
+				}
+			}
+			if (p.plugins.hasPlugin("io.freefair.aspectj")) {
+				String[] taskNames = [ "compileAspectj", "compileTestAspectj" ]
+				if (GradleVersion.version(p.getGradle().getGradleVersion()) >= GradleVersion.version("5.4")) {
+					for (final String taskName : taskNames) {
+						try {
+							Task task = p.getTasks().getByName(taskName)
+							eclipseModel.synchronizationTasks taskName
+						} catch (Exception e) {
+							// ignore
+						}
+					}
+				}
+				eclipseModel.classpath.file.whenMerged { cp ->
+					File projectDir = p.getProjectDir()
+					for (final String taskName : taskNames) {
+						Task task
+						try {
+							task = p.getTasks().getByName(taskName)
+						} catch (UnknownTaskException e) {
+							task = null;
+						}
+						if (task == null) {
+							continue
+						}
+						if (task.hasProperty("destinationDirectory")) {
+							def prop = task.destinationDirectory;
+							Object outputDir = null
+							if (prop instanceof org.gradle.api.file.DirectoryProperty) {
+								outputDir = prop.asFile.getOrNull()
+							} else if (prop instanceof File) {
+								outputDir = prop
+							}
+							if (outputDir != null && outputDir.exists()) {
+								cp.entries.removeAll { it instanceof org.gradle.plugins.ide.eclipse.model.Library && it.path.equals(outputDir.toString()) }
+								Object entry = new org.gradle.plugins.ide.eclipse.model.Library(fileReference(outputDir))
+								entry.exported = true
+								entry.entryAttributes.put("aspectj_generated", "true")
+								entry.entryAttributes.put("optional", "true")
+								entry.entryAttributes.put("ignore_optional_problems", "true")
+								cp.entries.add(entry)
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/managers/GradleProjectImporter.java

@@ -717,6 +717,12 @@ private static List<String> getGradleInitScriptArgs() {
 			addInitScriptToArgs(androidInitScript, args);
 		}
 
+		// Add init script of aspectj support
+		if (preferencesManager.getPreferences().isAspectjSupportEnabled()) {
+			File aspectjInitScript = GradleUtils.getGradleInitScript("/gradle/aspectj/init.gradle");
+			addInitScriptToArgs(aspectjInitScript, args);
+		}
+
 		return args;
 	}
 

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/preferences/Preferences.java

@@ -522,6 +522,7 @@ public class Preferences {
 
 	public static final String JAVA_JDT_LS_PROTOBUF_SUPPORT_ENABLED = "java.jdt.ls.protobufSupport.enabled";
 	public static final String JAVA_JDT_LS_ANDROID_SUPPORT_ENABLED = "java.jdt.ls.androidSupport.enabled";
+	public static final String JAVA_JDT_LS_ASPECTJ_SUPPORT_ENABLED = "java.jdt.ls.aspectjSupport.enabled";
 	public static final String JAVA_JDT_LS_JAVAC_ENABLED = "java.jdt.ls.javac.enabled";
 
 	public static final String JAVA_COMPILE_NULLANALYSIS_NONNULL = "java.compile.nullAnalysis.nonnull";
@@ -709,6 +710,7 @@ public class Preferences {
 	private ProjectEncodingMode projectEncoding;
 	private boolean avoidVolatileChanges;
 	private boolean protobufSupportEnabled;
+	private boolean aspectjSupportEnabled;
 	private boolean javacEnabled;
 	private boolean androidSupportEnabled;
 	private List<String> nonnullTypes;
@@ -1137,6 +1139,7 @@ public Preferences clone() {
 		prefs.projectEncoding = this.projectEncoding;
 		prefs.avoidVolatileChanges = this.avoidVolatileChanges;
 		prefs.protobufSupportEnabled = this.protobufSupportEnabled;
+		prefs.aspectjSupportEnabled = this.aspectjSupportEnabled;
 		prefs.javacEnabled = this.javacEnabled;
 		prefs.androidSupportEnabled = this.androidSupportEnabled;
 		prefs.nullAnalysisMode = this.nullAnalysisMode;
@@ -1753,6 +1756,11 @@ public static Preferences updateFrom(Preferences existing, Map<String, Object> c
 			prefs.setProtobufSupportEnabled(protobufSupported);
 		}
 
+		if (getValue(configuration, JAVA_JDT_LS_ASPECTJ_SUPPORT_ENABLED) != null) {
+			boolean aspectjSupported = getBoolean(configuration, JAVA_JDT_LS_ASPECTJ_SUPPORT_ENABLED, existing.aspectjSupportEnabled);
+			prefs.setAspectjSupportEnabled(aspectjSupported);
+		}
+
 		if (getValue(configuration, JAVA_JDT_LS_JAVAC_ENABLED) != null) {
 			boolean javacEnabled = getBoolean(configuration, JAVA_JDT_LS_JAVAC_ENABLED, existing.javacEnabled);
 			prefs.setJavacEnabled(javacEnabled);
@@ -2863,6 +2871,14 @@ public void setProtobufSupportEnabled(boolean protobufSupportEnabled) {
 		this.protobufSupportEnabled = protobufSupportEnabled;
 	}
 
+	public boolean isAspectjSupportEnabled() {
+		return aspectjSupportEnabled;
+	}
+
+	public void setAspectjSupportEnabled(boolean aspectjSupportEnabled) {
+		this.aspectjSupportEnabled = aspectjSupportEnabled;
+	}
+
 	public boolean isAndroidSupportEnabled() {
 		return this.androidSupportEnabled;
 	}