generate multi platform targets

Sources/ProjectSpec/ProjectSpec.swift

@@ -89,11 +89,7 @@ extension ProjectSpec {
         settingPresets = jsonDictionary.json(atKeyPath: "settingPresets") ?? [:]
         let configs: [String: String] = jsonDictionary.json(atKeyPath: "configs") ?? [:]
         self.configs = configs.map { Config(name: $0, type: ConfigType(rawValue: $1)) }
-        if jsonDictionary["targets"] == nil {
-            targets = []
-        } else {
-            targets = try jsonDictionary.json(atKeyPath: "targets", invalidItemBehaviour: .fail)
-        }
+        self.targets = try Target.decodeTargets(jsonDictionary: jsonDictionary)
         schemes = try jsonDictionary.json(atKeyPath: "schemes")
         if jsonDictionary["options"] != nil {
             options = try jsonDictionary.json(atKeyPath: "options")

Sources/ProjectSpec/Target.swift

@@ -46,6 +46,76 @@ public struct Target {
     }
 }
 
+extension Target {
+
+    static func decodeTargets(jsonDictionary: JSONDictionary) throws -> [Target]  {
+        guard jsonDictionary["targets"] != nil else {
+            return []
+        }
+        let array: [JSONDictionary] = try jsonDictionary.json(atKeyPath: "targets", invalidItemBehaviour: .fail)
+
+        var targets: [JSONDictionary] = []
+
+        let platformReplacement = "$platform"
+
+        for json in array {
+
+            if let platforms = json["platform"] as? [String] {
+
+                for platform in platforms {
+                    var platformTarget = json
+
+                    func replacePlatform(_ dictionary: JSONDictionary) -> JSONDictionary {
+                        var replaced = dictionary
+                        for (key, value) in dictionary {
+                            switch value {
+                            case let dictionary as JSONDictionary:
+                                replaced[key] = replacePlatform(dictionary)
+                            case let string as String:
+                                replaced[key] = string.replacingOccurrences(of: platformReplacement, with: platform)
+                            case let array as [JSONDictionary]:
+                                replaced[key] = array.map(replacePlatform)
+                            case let array as [String]:
+                                replaced[key] = array.map { $0.replacingOccurrences(of: platformReplacement, with: platform) }
+                            default: break
+                            }
+                        }
+                        return replaced
+                    }
+
+                    platformTarget = replacePlatform(platformTarget)
+
+                    platformTarget["platform"] = platform
+                    let platformSuffix = platformTarget["platformSuffix"] as? String ?? "_\(platform)"
+                    let platformPrefix = platformTarget["platformPrefix"] as? String ?? ""
+                    let name = platformTarget["name"] as? String ?? ""
+                    platformTarget["name"] = platformPrefix + name + platformSuffix
+
+                    var settings = platformTarget["settings"] as? JSONDictionary ?? [:]
+                    if settings["configs"] != nil || settings["presets"] != nil || settings["base"] != nil {
+                        var base = settings["base"] as? JSONDictionary ?? [:]
+                        if base["PRODUCT_NAME"] == nil {
+                            base["PRODUCT_NAME"] = name
+                        }
+                        settings["base"] = base
+                    } else {
+                        if settings["PRODUCT_NAME"] == nil {
+                            settings["PRODUCT_NAME"] = name
+                        }
+                    }
+                    platformTarget["settings"] = settings
+
+                    targets.append(platformTarget)
+                }
+            } else {
+                targets.append(json)
+            }
+        }
+        
+        return try targets.map { try Target(jsonDictionary: $0) }
+    }
+}
+
 extension Target: Equatable {
 
     public static func ==(lhs: Target, rhs: Target) -> Bool {

Tests/XcodeGenKitTests/SpecLoadingTests.swift

@@ -64,6 +64,28 @@ func specLoadingTests() {
             try expect(target.dependencies[2]) == .framework("path")
         }
 
+        $0.it("parsed cross platform targets") {
+            let targetDictionary: [String: Any] = [
+                "name":"Framework",
+                "platform": ["iOS", "tvOS"],
+                "type": "framework",
+                "sources": ["Framework", "Framework $platform"],
+                "settings": ["SETTING": "value_$platform"],
+            ]
+
+            let spec = try getProjectSpec(["targets":[targetDictionary]])
+            var target_iOS = Target(name: "Framework_iOS", type: .framework, platform: .iOS)
+            var target_tvOS = Target(name: "Framework_tvOS", type: .framework, platform: .tvOS)
+
+            target_iOS.sources = ["Framework","Framework iOS"]
+            target_tvOS.sources = ["Framework","Framework tvOS"]
+            target_iOS.settings = ["PRODUCT_NAME": "Framework", "SETTING": "value_iOS"]
+            target_tvOS.settings = ["PRODUCT_NAME": "Framework", "SETTING": "value_tvOS"]
+
+            try expect(spec.targets.count) == 2
+            try expect(spec.targets) == [target_iOS, target_tvOS]
+        }
+
         $0.it("parses schemes") {
             let schemeDictionary: [String: Any] = [
                 "build": ["targets": [
@@ -138,5 +160,6 @@ func specLoadingTests() {
             let parsedSpec = try getProjectSpec(["options": ["carthageBuildPath": "../Carthage/Build"]])
             try expect(parsedSpec) == expected
         }
+
     }
 }

docs/ProjectSpec.md

@@ -133,6 +133,30 @@ This will provide default build settings for a certain platform. It can be any o
 - macOS
 - watchOS
 
+**Multi Platform targets**
+
+You can also specify an array of platforms. This will generate a target for each platform.
+If you reference the string `$platform` anywhere within the target spec, that will be replaced with the platform.
+
+The generated targets by default will have a suffix of `_$platform` applied, you can change this by specifying a `platformSuffix` or `platformPrefix`.
+
+If no `PRODUCT_NAME` build setting is specified for a target, this will be set to the target name, so that this target can be imported under a single name.
+
+```
+name: MyFramework
+sources: MyFramework
+platform: [iOS, tvOS]
+type: framework
+settings:
+  base:
+    INFOPLIST_FILE: MyApp/Info.plist
+    PRODUCT_BUNDLE_IDENTIFIER: com.myapp
+    MY_SETTING: platform $platform
+  presets:
+    - $platform
+```
+The above will generate 2 targets named `MyFramework_iOS` and `MyFramework_tvOS`, with all the relevant platform build settings. They will both have a `PRODUCT_NAME` of `MyFramework`
+
 ### Sources
 Specifies the source directories for a target. This can either be a single path or a list of paths. Applicable source files, resources, headers, and lproj files will be parsed appropriately