Load json files directly with NSJSONSerialization if the spec path ha…

Fixtures/include_test.json

@@ -0,0 +1,29 @@
+{
+  "include": [
+    "included.yml"
+  ],
+  "name": "NewName",
+  "settingGroups": {
+    "test": {
+      "MY_SETTING1": "NEW VALUE",
+      "MY_SETTING3": "VALUE3"
+    },
+    "new": {
+      "MY_SETTING": "VALUE"
+    },
+    "toReplace:REPLACE": {
+      "MY_SETTING2": "VALUE2"
+    }
+  },
+  "targets": {
+    "NewTarget": {
+      "type": "application",
+      "platform": "iOS"
+    },
+    "IncludedTarget": {
+      "name": "IncludedTargetNew",
+      "platform": "tvOS",
+      "sources:REPLACE": "NewSource"
+    }
+  }
+}

Sources/ProjectSpec/SpecLoader.swift

@@ -19,7 +19,22 @@ extension ProjectSpec {
     }
 
     private static func loadDictionary(path: Path) throws -> JSONDictionary {
-        var json = try loadYamlDictionary(path: path)
+        // Get the current path extension
+        let pathExtension = path.`extension`
+
+        // Depending on the extension we will either load the file as YAML or JSON
+        var json = [String:Any]()
+        switch pathExtension?.lowercased() {
+        case .some("json"):
+            let string: String = try path.read()
+            guard let stringData = string.data(using: .utf8) else { fatalError("Error decoding file at path \(path)") }
+            guard let jsonObj = try JSONSerialization.jsonObject(with: stringData, options: .allowFragments) as? [String:Any] else {
+                                                                    fatalError("Invalid JSON at path \(path)")
+            }
+            json = jsonObj
+        default:
+            json = try loadYamlDictionary(path: path)
+        }
 
         var includes: [String]
         if let includeString = json["include"] as? String {
@@ -60,3 +75,4 @@ extension ProjectSpec {
         return merged
     }
 }
+

Tests/XcodeGenKitTests/SpecLoadingTests.swift

@@ -48,6 +48,25 @@ func specLoadingTests() {
         }
     }
 
+    describe("Spec Loader JSON") {
+        $0.it("merges includes") {
+            let path = fixturePath + "include_test.json"
+            let spec = try ProjectSpec(path: path)
+
+            try expect(spec.name) == "NewName"
+            try expect(spec.settingGroups) == [
+                "test": Settings(dictionary: ["MY_SETTING1": "NEW VALUE", "MY_SETTING2": "VALUE2", "MY_SETTING3": "VALUE3"]),
+                "new": Settings(dictionary: ["MY_SETTING": "VALUE"]),
+                "toReplace": Settings(dictionary: ["MY_SETTING2": "VALUE2"]),
+            ]
+            try expect(spec.targets) == [
+                Target(name: "IncludedTargetNew", type: .application, platform: .tvOS, sources: ["NewSource"]),
+                Target(name: "NewTarget", type: .application, platform: .iOS),
+            ]
+        }
+    }
+
+
     describe("Project Spec Parser") {
 
         $0.it("fails with incorrect platform") {