implements PR022

prometeu-compiler/frontends/prometeu-frontend-pbs/src/main/java/p/studio/compiler/services/PBSFrontendPhaseService.java

@@ -6,6 +6,7 @@ import p.studio.compiler.messages.FrontendPhaseContext;
 import p.studio.compiler.models.IRBackend;
 import p.studio.compiler.models.ProjectDescriptor;
 import p.studio.compiler.models.SourceHandle;
+import p.studio.compiler.models.SourceKind;
 import p.studio.compiler.pbs.PbsFrontendCompiler;
 import p.studio.compiler.pbs.ast.PbsAst;
 import p.studio.compiler.pbs.lexer.PbsLexer;
@@ -48,6 +49,7 @@ public class PBSFrontendPhaseService implements FrontendPhaseService {
 
         for (final var pId : ctx.stack.reverseTopologicalOrder) {
             final var projectDescriptor = ctx.projectTable.get(pId);
+            final var projectSourceKind = ctx.sourceKind(pId);
             final var fileIds = ctx.fileTable.getFiles(pId);
 
             for (final var fId : fileIds) {
@@ -65,7 +67,7 @@ public class PBSFrontendPhaseService implements FrontendPhaseService {
                                     final var parseErrorBaseline = diagnostics.errorCount();
                                     final var ast = parseSourceFile(fId, utf8Content, diagnostics);
                                     moduleUnit.sources.add(new PbsModuleVisibilityValidator.SourceFile(fId, ast));
-                                    parsedSourceFiles.add(new ParsedSourceFile(fId, ast, moduleKey));
+                                    parsedSourceFiles.add(new ParsedSourceFile(fId, ast, moduleKey, projectSourceKind));
                                     if (diagnostics.errorCount() > parseErrorBaseline) {
                                         failedModuleKeys.add(moduleKey);
                                     }
@@ -114,6 +116,9 @@ public class PBSFrontendPhaseService implements FrontendPhaseService {
                 continue;
             }
             final var irBackendFile = frontendCompiler.compileParsedFile(parsedSource.fileId(), parsedSource.ast(), diagnostics);
+            if (parsedSource.sourceKind() == SourceKind.SDK_INTERFACE) {
+                continue;
+            }
             irBackendAggregator.merge(irBackendFile);
         }
 
@@ -197,6 +202,7 @@ public class PBSFrontendPhaseService implements FrontendPhaseService {
     private record ParsedSourceFile(
             FileId fileId,
             PbsAst.File ast,
-            String moduleKey) {
+            String moduleKey,
+            SourceKind sourceKind) {
     }
 }

prometeu-compiler/frontends/prometeu-frontend-pbs/src/test/java/p/studio/compiler/services/PBSFrontendPhaseServiceTest.java

@@ -7,8 +7,10 @@ import p.studio.compiler.messages.FrontendPhaseContext;
 import p.studio.compiler.models.BuildStack;
 import p.studio.compiler.models.ProjectDescriptor;
 import p.studio.compiler.models.SourceHandle;
+import p.studio.compiler.models.SourceKind;
 import p.studio.compiler.pbs.linking.PbsLinkErrors;
 import p.studio.compiler.source.diagnostics.DiagnosticSink;
+import p.studio.compiler.source.identifiers.ProjectId;
 import p.studio.compiler.source.tables.FileTable;
 import p.studio.compiler.source.tables.ProjectTable;
 import p.studio.compiler.utilities.SourceProviderFactory;
@@ -173,8 +175,49 @@ class PBSFrontendPhaseServiceTest {
         assertEquals(2, irBackend.getFunctions().size());
     }
 
+    @Test
+    void shouldSkipIrLoweringForSourcesMarkedAsSdkInterface() throws IOException {
+        final var projectRoot = tempDir.resolve("project-sdk-interface");
+        final var sourceRoot = projectRoot.resolve("src");
+        final var modulePath = sourceRoot.resolve("gfx");
+        Files.createDirectories(modulePath);
+
+        final var sourceFile = modulePath.resolve("source.pbs");
+        final var modBarrel = modulePath.resolve("mod.barrel");
+        Files.writeString(sourceFile, "fn draw() -> int { return 1; }");
+        Files.writeString(modBarrel, "pub fn draw() -> int;");
+
+        final var projectTable = new ProjectTable();
+        final var fileTable = new FileTable(1);
+        final var projectId = projectTable.register(ProjectDescriptor.builder()
+                .rootPath(projectRoot)
+                .name("gfx-sdk")
+                .version("1.0.0")
+                .sourceRoots(ReadOnlyList.wrap(List.of(sourceRoot)))
+                .sourceKind(SourceKind.SDK_INTERFACE)
+                .build());
+
+        registerFile(projectId, projectRoot, sourceFile, fileTable);
+        registerFile(projectId, projectRoot, modBarrel, fileTable);
+
+        final var ctx = new FrontendPhaseContext(
+                projectTable,
+                fileTable,
+                new BuildStack(ReadOnlyList.wrap(List.of(projectId))));
+        final var diagnostics = DiagnosticSink.empty();
+
+        final var irBackend = new PBSFrontendPhaseService().compile(
+                ctx,
+                diagnostics,
+                LogAggregator.empty(),
+                BuildingIssueSink.empty());
+
+        assertTrue(diagnostics.isEmpty());
+        assertEquals(0, irBackend.getFunctions().size());
+    }
+
     private void registerFile(
-            final p.studio.compiler.source.identifiers.ProjectId projectId,
+            final ProjectId projectId,
             final Path projectRoot,
             final Path file,
             final FileTable fileTable) throws IOException {
@@ -187,4 +230,5 @@ class PBSFrontendPhaseServiceTest {
                 attributes.lastModifiedTime().toMillis(),
                 SourceProviderFactory.filesystem()));
     }
+
 }

prometeu-compiler/prometeu-compiler-core/src/main/java/p/studio/compiler/models/ProjectDescriptor.java

@@ -13,4 +13,6 @@ public final class ProjectDescriptor {
     private final String name; // project name
     private final String version; // project version
     private final ReadOnlyList<Path> sourceRoots; // source roots canon paths for the project
+    @Builder.Default
+    private final SourceKind sourceKind = SourceKind.PROJECT;
 }

prometeu-compiler/prometeu-compiler-core/src/main/java/p/studio/compiler/models/SourceKind.java

@@ -0,0 +1,7 @@
+package p.studio.compiler.models;
+
+public enum SourceKind {
+    PROJECT,
+    SDK_INTERFACE
+}
+

prometeu-compiler/prometeu-compiler-core/src/main/java/p/studio/compiler/source/tables/ProjectTableReader.java

@@ -1,6 +1,7 @@
 package p.studio.compiler.source.tables;
 
 import p.studio.compiler.models.ProjectDescriptor;
+import p.studio.compiler.models.SourceKind;
 import p.studio.compiler.source.identifiers.ProjectId;
 
 import java.nio.file.Path;
@@ -9,4 +10,7 @@ import java.util.Optional;
 public interface ProjectTableReader extends DenseTableReader<ProjectId, ProjectDescriptor> {
     Optional<ProjectDescriptor> optional(Path pathCanon);
     Optional<ProjectId> optionalId(Path pathCanon);
+    default SourceKind sourceKind(final ProjectId projectId) {
+        return get(projectId).getSourceKind();
+    }
 }

prometeu-compiler/prometeu-frontend-api/src/main/java/p/studio/compiler/messages/FrontendPhaseContext.java

@@ -1,6 +1,8 @@
 package p.studio.compiler.messages;
 
 import p.studio.compiler.models.BuildStack;
+import p.studio.compiler.models.SourceKind;
+import p.studio.compiler.source.identifiers.ProjectId;
 import p.studio.compiler.source.tables.FileTableReader;
 import p.studio.compiler.source.tables.ProjectTableReader;
 
@@ -17,4 +19,8 @@ public class FrontendPhaseContext {
         this.fileTable = fileTable;
         this.stack = stack;
     }
+
+    public SourceKind sourceKind(final ProjectId projectId) {
+        return projectTable.sourceKind(projectId);
+    }
 }