[ScanDependencies] Fix JSON generation under certain circunstances. (#67246)

The code of `ScanDependencies.cpp` was creating invalid JSON since #66031
because in the case of having `extraPcmArgs` and `swiftOverlayDependencies`,
but not `bridgingHeader`, a comma will not be added at the end of
`extraPcmArgs`, creating an invalid JSON file. Additionally that same PR
added a trailing comma at the end of the `swiftOverlayDependencies`, which
valid JSON does not allow, but that bug was removed in #66366.

Both problems are, however, present in the 5.9 branch, because #66936
included #66031, but not #66366.

Besides fixing the problem in `ScanDependencies.cpp` I modified every test
that uses `--scan-dependencies` to pass the produced JSON through
Python's `json.tool` in order to validate proper JSON is produced. In
most cases I was able to pipe the output of the tool into `FileCheck`,
but in some cases the validation is done by itself because the checks
depend on the exact format generated by `--scan-dependencies`. In
a couple of tests I added a call to `FileCheck` that seemed to be
missing.

Without these changes, two tests seems to be generating invalid JSON in
my machine:

- `ScanDependencies/local_cache_consistency.swift` (which outputs `Expecting ',' delimiter: line 525 column 11 (char 22799)`)
- `ScanDependencies/placholder_overlay_deps.swift`

Author: drodriguez

Diff for: lib/DependencyScan/ScanDependencies.cpp

@@ -1061,8 +1061,11 @@ static void writeJSON(llvm::raw_ostream &out,
       bool hasOverlayDependencies =
           swiftTextualDeps->swift_overlay_module_dependencies &&
           swiftTextualDeps->swift_overlay_module_dependencies->count > 0;
+      bool commaAfterBridgingHeaderPath = hasOverlayDependencies;
+      bool commaAfterExtraPcmArgs =
+          hasBridgingHeaderPath || commaAfterBridgingHeaderPath;
       bool commaAfterFramework =
-          swiftTextualDeps->extra_pcm_args->count != 0 || hasBridgingHeaderPath;
+          swiftTextualDeps->extra_pcm_args->count != 0 || commaAfterExtraPcmArgs;
 
       if (swiftTextualDeps->cas_fs_root_id.length != 0) {
         writeJSONSingleField(out, "casFSRootID",
@@ -1090,7 +1093,7 @@ static void writeJSON(llvm::raw_ostream &out,
           out << "\n";
         }
         out.indent(5 * 2);
-        out << (hasBridgingHeaderPath ? "],\n" : "]\n");
+        out << (commaAfterExtraPcmArgs ? "],\n" : "]\n");
       }
       /// Bridging header and its source file dependencies, if any.
       if (hasBridgingHeaderPath) {
@@ -1126,7 +1129,7 @@ static void writeJSON(llvm::raw_ostream &out,
         out.indent(6 * 2);
         out << "]\n";
         out.indent(5 * 2);
-        out << (hasOverlayDependencies ? "},\n" : "}\n");
+        out << (commaAfterBridgingHeaderPath ? "},\n" : "}\n");
       }
       if (hasOverlayDependencies) {
         writeDependencies(out, swiftTextualDeps->swift_overlay_module_dependencies,

Diff for: test/CAS/binary_module_deps.swift

@@ -7,7 +7,7 @@
 // RUN: %target-swift-frontend -emit-module -module-cache-path %t/clang-module-cache %S/../ScanDependencies/Inputs/Swift/E.swiftinterface -o %t/E.swiftmodule -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -swift-version 4
 // RUN: %target-swift-frontend -emit-module -module-cache-path %t/clang-module-cache %S/../ScanDependencies/Inputs/Swift/A.swiftinterface -o %t/A.swiftmodule -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -swift-version 4
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %t -swift-version 4 -cache-compile-job -cas-path %t/cas
-// RUN: %FileCheck %s -DTEMP=%t < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s -DTEMP=%t
 
 /// Test binary module key: binary module key is the CASID of itself.
 // RUN: %S/Inputs/SwiftDepsExtractor.py %t/deps.json swiftPrebuiltExternal:A moduleCacheKey > %t/A.key.casid

Diff for: test/CAS/cas-explicit-module-map.swift

@@ -6,6 +6,7 @@
 // RUN: %target-swift-frontend -emit-module -module-cache-path %t/clang-module-cache %t/A.swift -o %t/A.swiftmodule -swift-version 5
 // RUN: %target-swift-frontend -emit-module -module-cache-path %t/clang-module-cache %t/B.swift -o %t/B.swiftmodule -I %t -swift-version 5
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %t/Test.swift -o %t/deps.json -I %t -swift-version 5 -cache-compile-job -cas-path %t/cas
+// RUN: %validate-json %t/deps.json &>/dev/null
 
 // RUN: %S/Inputs/SwiftDepsExtractor.py %t/deps.json swiftPrebuiltExternal:A moduleCacheKey | tr -d '\n' > %t/A.key
 // RUN: %S/Inputs/SwiftDepsExtractor.py %t/deps.json swiftPrebuiltExternal:B moduleCacheKey | tr -d '\n' > %t/B.key

Diff for: test/CAS/module_deps.swift

@@ -6,6 +6,7 @@
 
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/../ScanDependencies/Inputs/CHeaders/Bridging.h -swift-version 4 -cache-compile-job -cas-path %t/cas
 // Check the contents of the JSON output
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK -check-prefix CHECK_NO_CLANG_TARGET %s < %t/deps.json
 
 // Check the contents of the JSON output
@@ -15,11 +16,13 @@
 // RUN: %FileCheck %s -check-prefix CHECK-MAKE-DEPS < %t/deps.d
 
 // RUN: %target-swift-frontend -scan-dependencies -test-dependency-scan-cache-serialization -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -import-objc-header %S/../ScanDependencies/Inputs/CHeaders/Bridging.h -swift-version 4 -cache-compile-job -cas-path %t/cas
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK -check-prefix CHECK_NO_CLANG_TARGET %s < %t/deps.json
 
 // Ensure that scanning with `-clang-target` makes sure that Swift modules' respective PCM-dependency-build-argument sets do not contain target triples.
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps_clang_target.json -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -import-objc-header %S/../ScanDependencies/Inputs/CHeaders/Bridging.h -swift-version 4 -clang-target %target-cpu-apple-macosx10.14 -cache-compile-job -cas-path %t/cas
 // Check the contents of the JSON output
+// RUN: %validate-json %t/deps_clang_target.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK_CLANG_TARGET %s < %t/deps_clang_target.json
 
 /// check cas-fs content

Diff for: test/CAS/module_deps_clang_extras.swift

@@ -10,6 +10,7 @@
 // RUN:   %t/Test.swift -o %t/deps.json -cache-compile-job -cas-path %t/cas -clang-include-tree \
 // RUN:   -Xcc -fmodule-map-file=%t/module.modulemap -Xcc -ivfsoverlay -Xcc %t/empty.yaml \
 // RUN:   -Xcc -I%t/empty.hmap
+// RUN: %validate-json %t/deps.json &>/dev/null
 
 // RUN: %S/Inputs/SwiftDepsExtractor.py %t/deps.json deps casFSRootID > %t/fs.casid
 // RUN: llvm-cas --cas %t/cas --ls-tree-recursive @%t/fs.casid | %FileCheck %s -DDIR=%basename_t -check-prefix FS_ROOT

Diff for: test/CAS/module_deps_include_tree.swift

@@ -6,6 +6,7 @@
 
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/../ScanDependencies/Inputs/CHeaders/Bridging.h -swift-version 4 -cache-compile-job -cas-path %t/cas -clang-include-tree
 // Check the contents of the JSON output
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK -check-prefix CHECK_NO_CLANG_TARGET %s < %t/deps.json
 
 // Check the contents of the JSON output
@@ -15,11 +16,13 @@
 // RUN: %FileCheck %s -check-prefix CHECK-MAKE-DEPS < %t/deps.d
 
 // RUN: %target-swift-frontend -scan-dependencies -test-dependency-scan-cache-serialization -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -import-objc-header %S/../ScanDependencies/Inputs/CHeaders/Bridging.h -swift-version 4 -cache-compile-job -cas-path %t/cas -clang-include-tree
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK -check-prefix CHECK_NO_CLANG_TARGET %s < %t/deps.json
 
 // Ensure that scanning with `-clang-target` makes sure that Swift modules' respective PCM-dependency-build-argument sets do not contain target triples.
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps_clang_target.json -I %S/../ScanDependencies/Inputs/CHeaders -I %S/../ScanDependencies/Inputs/Swift -import-objc-header %S/../ScanDependencies/Inputs/CHeaders/Bridging.h -swift-version 4 -clang-target %target-cpu-apple-macosx10.14 -cache-compile-job -cas-path %t/cas -clang-include-tree
 // Check the contents of the JSON output
+// RUN: %validate-json %t/deps_clang_target.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK_CLANG_TARGET %s < %t/deps_clang_target.json
 
 /// check cas-fs content

Diff for: test/CAS/plugin_cas.swift

@@ -13,6 +13,7 @@
 // RUN:   -cas-plugin-option first-prefix=myfirst- -cas-plugin-option second-prefix=mysecond- \
 // RUN:   -cas-plugin-option upstream-path=%t/cas-upstream
 // Check the contents of the JSON output
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK -check-prefix CHECK_NO_CLANG_TARGET %s < %t/deps.json
 
 // Check the contents of the JSON output
@@ -31,6 +32,7 @@
 // RUN:   -cas-plugin-option first-prefix=myfirst- -cas-plugin-option second-prefix=mysecond- \
 // RUN:   -cas-plugin-option upstream-path=%t/cas-upstream
 // Check the contents of the JSON output
+// RUN: %validate-json %t/deps_clang_target.json &>/dev/null
 // RUN: %FileCheck -check-prefix CHECK_CLANG_TARGET %s < %t/deps_clang_target.json
 
 import C

Diff for: test/Frontend/module-alias-scan-deps.swift

@@ -12,7 +12,7 @@
 
 /// Scanned dependencies should contain real name AppleLogging
 // RUN: %target-swift-frontend -scan-dependencies  %t/FileLib.swift -module-alias XLogging=AppleLogging -I %t > %t/scandump.output
-// RUN: %FileCheck %s -check-prefix=CHECK-REAL-NAME -input-file  %t/scandump.output
+// RUN: %validate-json %t/scandump.output | %FileCheck %s -check-prefix=CHECK-REAL-NAME
 // CHECK-REAL-NAME-NOT: "swiftPrebuiltExternal": "XLogging"
 // CHECK-REAL-NAME-NOT: "compiledModulePath":{{.*}}XLogging.swiftmodule",
 // CHECK-REAL-NAME: "swiftPrebuiltExternal": "AppleLogging"
@@ -25,7 +25,7 @@
 
 /// Scanned dependencies should contain real name AppleLoggingIF
 // RUN: %target-swift-frontend -scan-dependencies  %t/FileLib.swift -module-alias XLogging=AppleLoggingIF -I %t > %t/scandumpIF.output
-// RUN: %FileCheck %s -check-prefix=CHECK-REAL-NAME-IF -input-file  %t/scandumpIF.output
+// RUN: %validate-json %t/scandumpIF.output | %FileCheck %s -check-prefix=CHECK-REAL-NAME-IF
 // CHECK-REAL-NAME-IF-NOT: "swift": "XLogging"
 // CHECK-REAL-NAME-IF-NOT: "moduleInterfacePath":{{.*}}XLogging.swiftinterface
 // CHECK-REAL-NAME-IF: "swift": "AppleLoggingIF"

Diff for: test/ModuleInterface/clang-args-transitive-availability.swift

@@ -6,6 +6,7 @@
 // RUN: %target-swift-frontend -typecheck -strict-implicit-module-context %s -I %S/Inputs/macro-only-module -Xcc -DTANGERINE=1 -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import
 
 // RUN: %target-swift-frontend -scan-dependencies -strict-implicit-module-context %s -o %t/deps.json -I %S/Inputs/macro-only-module -Xcc -DTANGERINE=1 -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck %s < %t/deps.json
 
 import ImportsMacroSpecificClangModule

Diff for: test/ModuleInterface/clang-session-transitive.swift

@@ -5,6 +5,7 @@
 // RUN: %target-build-swift -module-name TestModule -module-link-name TestModule %S/Inputs/TestModule.swift -enable-library-evolution -emit-module-interface -o %t/TestModule.swiftmodule -swift-version 5 -Xfrontend -disable-implicit-concurrency-module-import -Xfrontend -disable-implicit-string-processing-module-import
 
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -I%t -validate-clang-modules-once -clang-build-session-file %t/Build.session -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck %s < %t/deps.json
 
 import TestModule

Diff for: test/ModuleInterface/extension-transitive-availability.swift

@@ -4,6 +4,7 @@
 // RUN: %target-swift-emit-module-interface(%t/ExtensionAvailable.swiftinterface) %S/Inputs/extension-available.swift -module-name ExtensionAvailable -I%t -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import
 
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -I%t -application-extension -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import
+// RUN: %validate-json %t/deps.json &>/dev/null
 // RUN: %FileCheck %s < %t/deps.json
 
 import ExtensionAvailable

Diff for: test/ModuleInterface/infer-arch-from-file.swift

@@ -6,6 +6,6 @@
 import arm64
 
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -I %t -target arm64-apple-macos11.0
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 // CHECK-NOT: arm64e-apple-macos11.0

Diff for: test/ScanDependencies/batch_module_scan.swift

@@ -17,8 +17,8 @@
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/Inputs/CHeaders/Bridging.h -swift-version 4 -batch-scan-input-file %/t/inputs/input.json
 
 // Check the contents of the JSON output
-// RUN: %FileCheck %s -check-prefix=CHECK-PCM < %t/outputs/F.pcm.json
-// RUN: %FileCheck %s -check-prefix=CHECK-SWIFT < %t/outputs/F.swiftmodule.json
+// RUN: %validate-json %t/outputs/F.pcm.json | %FileCheck %s -check-prefix=CHECK-PCM
+// RUN: %validate-json %t/outputs/F.swiftmodule.json | %FileCheck %s -check-prefix=CHECK-SWIFT
 
 // CHECK-PCM: 		{
 // CHECK-PCM-NEXT:  "mainModuleName": "F",

Diff for: test/ScanDependencies/batch_module_scan_arguments.swift

@@ -17,8 +17,8 @@
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/Inputs/CHeaders/Bridging.h -swift-version 4 -batch-scan-input-file %/t/inputs/input.json
 
 // Check the contents of the JSON output
-// RUN: %FileCheck %s -check-prefix=CHECK-TEN < %t/outputs/H.10.9.pcm.json
-// RUN: %FileCheck %s -check-prefix=CHECK-ELEVEN < %t/outputs/H.11.0.pcm.json
+// RUN: %validate-json %t/outputs/H.10.9.pcm.json | %FileCheck %s -check-prefix=CHECK-TEN
+// RUN: %validate-json %t/outputs/H.11.0.pcm.json | %FileCheck %s -check-prefix=CHECK-ELEVEN
 
 // CHECK-TEN: "clang": "I"
 // CHECK-ELEVEN-NOT: "clang": "I"

Diff for: test/ScanDependencies/batch_module_scan_versioned.swift

@@ -17,7 +17,8 @@
 // RUN: %target-swift-frontend -scan-dependencies -disable-implicit-concurrency-module-import -disable-implicit-string-processing-module-import -target %target-cpu-apple-macosx11.0 -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/Inputs/CHeaders/Bridging.h -swift-version 4 -batch-scan-input-file %/t/inputs/input.json
 
 // Check the contents of the JSON output
-// RUN: %FileCheck %s -check-prefix=CHECK-PCM109 < %t/outputs/G_109.pcm.json
+// RUN: %validate-json %t/outputs/G_109.pcm.json | %FileCheck %s -check-prefix=CHECK-PCM109
+// RUN: %validate-json %t/outputs/G_110.pcm.json &>/dev/null
 // RUN: %FileCheck %s -check-prefix=CHECK-PCM110 < %t/outputs/G_110.pcm.json
 
 // CHECK-PCM109: 		{

Diff for: test/ScanDependencies/batch_prescan.swift

@@ -12,7 +12,7 @@
 // RUN: %target-swift-frontend -scan-dependencies -import-prescan -module-cache-path %t/clang-module-cache %s -o %t/deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/Inputs/CHeaders/Bridging.h -swift-version 4 -batch-scan-input-file %/t/inputs/input.json
 
 // Check the contents of the JSON output
-// RUN: %FileCheck %s -check-prefix=CHECK-SWIFT < %t/outputs/F.swiftmodule.json
+// RUN: %validate-json %t/outputs/F.swiftmodule.json | %FileCheck %s -check-prefix=CHECK-SWIFT
 
 // CHECK-SWIFT: {
 // CHECK-SWIFT-NEXT:"imports": [

Diff for: test/ScanDependencies/bin_mod_import.swift

@@ -8,11 +8,11 @@ import EWrapper
 // RUN: %target-swift-frontend -compile-module-from-interface %S/Inputs/Swift/EWrapper.swiftinterface -o %t/EWrapper.swiftmodule -I %t
 // Step 3: scan dependency should give us the binary module and a textual swift dependency from it
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -I %t
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 // Step 4: Ensure that round-trip serialization does not affect result
 // RUN: %target-swift-frontend -scan-dependencies -test-dependency-scan-cache-serialization %s -o %t/deps.json -I %t
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 // CHECK: "modulePath": "{{.*}}EWrapper.swiftmodule"
 // CHECK-NEXT: "directDependencies": [

Diff for: test/ScanDependencies/binary_framework_dependency.swift

@@ -11,7 +11,7 @@
 
 // Run the scan
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -F %t/Frameworks/ -sdk %t
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 import Foo
 

Diff for: test/ScanDependencies/binary_module_only.swift

@@ -22,8 +22,8 @@ import Foo
 
 // Step 3: scan dependencies, pointed only at the binary module file should detect it as a swiftBinaryModule kind of dependency
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -I %t/binaryModuleOnly -emit-dependencies -emit-dependencies-path %t/deps.d -sdk %t -prebuilt-module-cache-path %t/ResourceDir/%target-sdk-name/prebuilt-modules
-// RUN: %FileCheck %s -check-prefix=BINARY_MODULE_ONLY < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s -check-prefix=BINARY_MODULE_ONLY
 
 // Step 4: Ensure that round-trip serialization does not affect result
 // RUN: %target-swift-frontend -scan-dependencies -test-dependency-scan-cache-serialization %s -o %t/deps.json -I %t/binaryModuleOnly -emit-dependencies -emit-dependencies-path %t/deps.d -sdk %t -prebuilt-module-cache-path %t/ResourceDir/%target-sdk-name/prebuilt-modules
-// RUN: %FileCheck %s -check-prefix=BINARY_MODULE_ONLY < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s -check-prefix=BINARY_MODULE_ONLY

Diff for: test/ScanDependencies/blocklist-path-pass-down.swift

@@ -15,7 +15,7 @@
 
 // Run the scan
 // RUN: %target-swift-frontend -scan-dependencies %s -o %t/deps.json -F %t/Frameworks/ -sdk %t -blocklist-file %t/blocklist.yml
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 import E
 

Diff for: test/ScanDependencies/can_import_placeholder.swift

@@ -11,11 +11,11 @@
 // RUN: echo "}]" >> %/t/inputs/map.json
 
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t/clang-module-cache %s -placeholder-dependency-module-map-file %t/inputs/map.json -o %t/deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/Inputs/CHeaders/Bridging.h -swift-version 4
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 // Ensure that round-trip serialization does not affect result
 // RUN: %target-swift-frontend -scan-dependencies -test-dependency-scan-cache-serialization -module-cache-path %t/clang-module-cache %s -placeholder-dependency-module-map-file %t/inputs/map.json -o %t/deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -emit-dependencies -emit-dependencies-path %t/deps.d -import-objc-header %S/Inputs/CHeaders/Bridging.h -swift-version 4
-// RUN: %FileCheck %s < %t/deps.json
+// RUN: %validate-json %t/deps.json | %FileCheck %s
 
 // REQUIRES: executable_test
 // REQUIRES: objc_interop

Diff for: test/ScanDependencies/clang-target.swift

@@ -14,7 +14,7 @@
 // RUN: find %t.module-cache -name "X-*.pcm" | count 1
 // RUN: %target-swift-frontend -scan-dependencies -module-cache-path %t.module-cache %s -o %t.deps.json -I %S/Inputs/CHeaders -I %S/Inputs/Swift -target %target-cpu-apple-macosx10.14 -clang-target %target-cpu-apple-macosx10.14
 
-// RUN: %FileCheck %s < %t.deps.json
+// RUN: %validate-json %t.deps.json | %FileCheck %s
 
 // CHECK: "-clang-target"
 // CHECK-NEXT: "{{.*}}-apple-macosx10.14"