Issue #1058: Moved generation of the compile_commands.json (#1075)

Moved compile_commands.json file to performPrebuildGeneration, so the
file to be generated only when Makefiles generation is set to be on.

Author: alicetrifu

build/org.eclipse.cdt.managedbuilder.core.tests/tests/org/eclipse/cdt/managedbuilder/core/tests/CompilationDatabaseGenerationTest.java

@@ -17,6 +17,12 @@
 
 import java.io.FileReader;
 
+import org.eclipse.cdt.managedbuilder.core.IBuilder;
+import org.eclipse.cdt.managedbuilder.core.IConfiguration;
+import org.eclipse.cdt.managedbuilder.core.IManagedBuildInfo;
+import org.eclipse.cdt.managedbuilder.core.IManagedProject;
+import org.eclipse.cdt.managedbuilder.core.IToolChain;
+import org.eclipse.cdt.managedbuilder.core.ManagedBuildManager;
 import org.eclipse.cdt.managedbuilder.core.jsoncdb.CompilationDatabaseInformation;
 import org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder;
 import org.eclipse.cdt.managedbuilder.testplugin.AbstractBuilderTest;
@@ -199,4 +205,19 @@ public void testCompilerPath() throws Exception {
 			}
 		}
 	}
+
+	@Test
+	public void testMakeFileGenerationOff() throws Exception {
+		setWorkspace("regressions");
+		final IProject app = loadProject("helloworldC");
+		IManagedBuildInfo info = ManagedBuildManager.getBuildInfo(app);
+		IManagedProject mProj = info.getManagedProject();
+		IConfiguration cfg = mProj.getConfigurations()[0];
+		IToolChain toolChain = cfg.getToolChain();
+		IBuilder builder = toolChain.getBuilder();
+		setGenerateFileOptionEnabled(true);
+		builder.setManagedBuildOn(false);
+		app.build(IncrementalProjectBuilder.FULL_BUILD, null);
+		assertFalse(app.getFile("Debug/compile_commands.json").exists());
+	}
 }

build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/CommonBuilder.java

@@ -510,10 +510,6 @@ private IProject[] build(int kind, IProject project, IBuilder[] builders, boolea
 			}
 
 			for (int i = 0; i < num; i++) {
-				if (isGenerateFileOptionEnabled()) {
-					CompilationDatabaseGenerator generator = new CompilationDatabaseGenerator(getProject(), activeCfg);
-					generator.generate();
-				}
 				//bug 219337
 				if (kind == INCREMENTAL_BUILD || kind == AUTO_BUILD) {
 					if (buildConfigResourceChanges()) { //only build projects with project resource changes
@@ -883,6 +879,12 @@ protected BuildStatus performPostbuildGeneration(int kind, CfgBuildInfo bInfo, B
 
 	protected BuildStatus performPrebuildGeneration(int kind, CfgBuildInfo bInfo, BuildStatus buildStatus,
 			IProgressMonitor monitor) throws CoreException {
+
+		if (isGenerateFileOptionEnabled()) {
+			CompilationDatabaseGenerator generator = new CompilationDatabaseGenerator(getProject(),
+					bInfo.getConfiguration());
+			generator.generate();
+		}
 		IBuilder builder = bInfo.getBuilder();
 		if (builder.isInternalBuilder())
 			return buildStatus;