Print Module Fingerprints in swift-ide-test

Author: CodaFi

test/Incremental/CrossModule/Inputs/module-fingerprint/A.json

@@ -0,0 +1,11 @@
+{
+  "A.swift": {
+    "object": "./A.o",
+    "swift-dependencies": "./A.swiftdeps",
+    "swiftmodule": "./A~partial.swiftmodule",
+    "swiftdoc": "./A.swiftdoc"
+  },
+  "": {
+    "swift-dependencies": "./A~buildrecord.swiftdeps"
+  }
+}

test/Incremental/CrossModule/Inputs/module-fingerprint/A.swift

@@ -0,0 +1,6 @@
+import B
+import C
+
+public func use() {
+  fromB()
+}

test/Incremental/CrossModule/Inputs/module-fingerprint/B.json

@@ -0,0 +1,11 @@
+{
+  "B.swift": {
+    "object": "./B.o",
+    "swift-dependencies": "./B.swiftdeps",
+    "swiftmodule": "./B~partial.swiftmodule",
+    "swiftdoc": "./B.swiftdoc"
+  },
+  "": {
+    "swift-dependencies": "./B~buildrecord.swiftdeps"
+  }
+}

test/Incremental/CrossModule/Inputs/module-fingerprint/B.swift

@@ -0,0 +1,5 @@
+import C
+
+public func fromB() {
+  return fromC()
+}

test/Incremental/CrossModule/Inputs/module-fingerprint/C.json

@@ -0,0 +1,11 @@
+{
+  "C.swift": {
+    "object": "./C.o",
+    "swift-dependencies": "./C.swiftdeps",
+    "swiftmodule": "./C~partial.swiftmodule",
+    "swiftdoc": "./C.swiftdoc"
+  },
+  "": {
+    "swift-dependencies": "./C~buildrecord.swiftdeps"
+  }
+}

test/Incremental/CrossModule/Inputs/module-fingerprint/C.swift

@@ -0,0 +1,2 @@
+public func fromC(parameter: Int = 0) {}
+

test/Incremental/CrossModule/module-fingerprint.swift

@@ -0,0 +1,37 @@
+// RUN: %empty-directory(%t)
+// RUN: cp -r %S/Inputs/module-fingerprint/* %t
+
+//
+// Set up a clean incremental build of all three modules
+//
+
+// RUN: cd %t && %target-swiftc_driver -c -incremental -emit-dependencies -emit-module -emit-module-path %t/C.swiftmodule -enable-experimental-cross-module-incremental-build -module-name C -I %t -output-file-map %t/C.json -working-directory %t -driver-show-incremental -driver-show-job-lifecycle C.swift
+// RUN: cd %t && %target-swiftc_driver -c -incremental -emit-dependencies -emit-module -emit-module-path %t/B.swiftmodule -enable-experimental-cross-module-incremental-build -module-name B -I %t -output-file-map %t/B.json -working-directory %t -driver-show-incremental -driver-show-job-lifecycle B.swift
+// RUN: cd %t && %target-swiftc_driver -c -incremental -emit-dependencies -emit-module -emit-module-path %t/A.swiftmodule -enable-experimental-cross-module-incremental-build -module-name A -I %t -output-file-map %t/A.json -working-directory %t -driver-show-incremental -driver-show-job-lifecycle A.swift
+
+// RUN: %target-swift-ide-test -print-module-metadata -module-to-print C -enable-swiftsourceinfo -I %t -source-filename %s | %FileCheck %s --check-prefix=CHECK-CLEAN-C
+// RUN: %target-swift-ide-test -print-module-metadata -module-to-print B -enable-swiftsourceinfo -I %t -source-filename %s | %FileCheck %s --check-prefix=CHECK-CLEAN-B
+// RUN: %target-swift-ide-test -print-module-metadata -module-to-print A -enable-swiftsourceinfo -I %t -source-filename %s | %FileCheck %s --check-prefix=CHECK-CLEAN-A
+
+// CHECK-CLEAN-C: fingerprint=6e60fd224d614a59568a348e0ac9b55a
+// CHECK-CLEAN-B: fingerprint=bfa14052e1df9253b7bf7e0eb7cfc505
+// CHECK-CLEAN-A: fingerprint=a939d89f07c766a4607c5fe1a1715cf5
+
+//
+// Now change C and ensure that B rebuilds but A does not
+//
+
+// RUN: cd %t && echo "public func other() {}" >> C.swift
+
+// RUN: cd %t && %target-swiftc_driver -c -incremental -emit-dependencies -emit-module -emit-module-path %t/C.swiftmodule -enable-experimental-cross-module-incremental-build -module-name C -I %t -output-file-map %t/C.json -working-directory %t -driver-show-incremental -driver-show-job-lifecycle C.swift
+// RUN: touch %t/C.swiftmodule
+// RUN: cd %t && %target-swiftc_driver -c -incremental -emit-dependencies -emit-module -emit-module-path %t/B.swiftmodule -enable-experimental-cross-module-incremental-build -module-name B -I %t -output-file-map %t/B.json -working-directory %t -driver-show-incremental -driver-show-job-lifecycle B.swift
+// RUN: cd %t && %target-swiftc_driver -c -incremental -emit-dependencies -emit-module -emit-module-path %t/A.swiftmodule -enable-experimental-cross-module-incremental-build -module-name A -I %t -output-file-map %t/A.json -working-directory %t -driver-show-incremental -driver-show-job-lifecycle A.swift
+
+// RUN: %target-swift-ide-test -print-module-metadata -module-to-print C -enable-swiftsourceinfo -I %t -source-filename %s | %FileCheck %s --check-prefix=CHECK-INCREMENTAL-C
+// RUN: %target-swift-ide-test -print-module-metadata -module-to-print B -enable-swiftsourceinfo -I %t -source-filename %s | %FileCheck %s --check-prefix=CHECK-INCREMENTAL-B
+// RUN: %target-swift-ide-test -print-module-metadata -module-to-print A -enable-swiftsourceinfo -I %t -source-filename %s | %FileCheck %s --check-prefix=CHECK-INCREMENTAL-A
+
+// CHECK-INCREMENTAL-C: fingerprint=3e68d59b74032e18401ec978cdb11cf3
+// CHECK-INCREMENTAL-B: fingerprint=bfa14052e1df9253b7bf7e0eb7cfc505
+// CHECK-INCREMENTAL-A: fingerprint=a939d89f07c766a4607c5fe1a1715cf5

tools/swift-ide-test/swift-ide-test.cpp

@@ -2516,6 +2516,7 @@ static int doPrintModuleGroups(const CompilerInvocation &InitInvok,
 
 static void printModuleMetadata(ModuleDecl *MD) {
   auto &OS = llvm::outs();
+  OS << "fingerprint=" << MD->getFingerprint().getRawValue() << "\n";
   MD->collectLinkLibraries([&](LinkLibrary lib) {
     OS << "link library: " << lib.getName()
        << ", force load: " << (lib.shouldForceLoad() ? "true" : "false") << "\n";