[clang] [clang][Dependency Scanning] Report Exported Modules during Scanning (PR #137421)

[Qiongsi Wu via cfe-commits]

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@@ -0,0 +1,164 @@
+// Test correctly reporting what a module exports during dependency scanning.
+// Module A depends on modules B, C and D, but only exports B and C.
+// Module E depends on modules B, C and D, and exports all of them.
+
+// RUN: rm -rf %t
+// RUN: split-file %s %t
+// RUN: sed -e "s|DIR|%/t|g" %t/cdb.json.template > %t/cdb.json
+// RUN: clang-scan-deps -compilation-database \
+// RUN:   %t/cdb.json -format experimental-full > %t/deps.db
+// RUN: cat %t/deps.db | sed 's:\\\\\?:/:g' | FileCheck %s
+
+//--- cdb.json.template
+[
+    {
+      "directory": "DIR",
+      "command": "clang -c DIR/test.c -I DIR/AH -I DIR/BH -I DIR/CH -I DIR/DH -I DIR/EH -fmodules -fmodules-cache-path=DIR/cache",
+      "file": "DIR/test.c"
+    },
+]
+
+//--- AH/A.h
+#include "B.h"
+#include "C.h"
+#include "D.h"
+
+int funcA();
+
+//--- AH/module.modulemap
+module A {
+    header "A.h"
+
+    export B
+    export C
+}
+
+//--- BH/B.h
+//--- BH/module.modulemap
+module B {
+    header "B.h"
+}
+
+//--- CH/C.h
+//--- CH/module.modulemap
+module C {
+    header "C.h"
+}
+
+//--- DH/D.h
+//--- DH/module.modulemap
+module D {
+    header "D.h"
+}
+
+//--- EH/E.h
+#include "B.h"
+#include "C.h"
+#include "D.h"
+
+//--- EH/module.modulemap
+module E {
+    header "E.h"
+    export *
+}
+
+//--- test.c
+#include "A.h"
+#include "E.h"
+
+int test1() {
+  return funcA();
+}
+
+// CHECK:      {
+// CHECK-NEXT:   "modules": [
+// CHECK-NEXT:         {
+// CHECK-NEXT:           "clang-module-deps": [
+// CHECK-NEXT:             {
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qiongsiwu wrote:

Good point! Fixed. 

https://github.com/llvm/llvm-project/pull/137421