Add implicit option to framework Dependency

Docs/ProjectSpec.md

@@ -247,6 +247,12 @@ These only applied to `target` and `framework` dependencies.
 - ⚪️ **codeSign**: `Bool` - Whether the `codeSignOnCopy` setting is applied when embedding framework. Defaults to true
 - ⚪️ **removeHeaders**: `Bool` - Whether the `removeHeadersOnCopy` setting is applied when embedding the framework. Defaults to true
 
+**Implicit Framework options**:
+
+This only applies to `framework` dependencies. Implicit framework dependencies are useful in Xcode Workspaces which have multiple `.xcodeproj` that are not embedded within each other yet have a dependency on a framework built in an adjacent `.xcodeproj`.  By having `Find Implicit Dependencies` checked within your scheme `Build Options` Xcode can link built frameworks in `BUILT_PRODUCTS_DIR`.
+
+- ⚪️ **implicit**: `Bool` - Whether the framework is an implicit dependency. Defaults to `false` .
+
 **Carthage Dependency**
 
 Carthage frameworks are expected to be in `CARTHAGE_BUILD_PATH/PLATFORM/FRAMEWORK.framework` where:

Sources/ProjectSpec/Dependency.swift

@@ -17,12 +17,14 @@ public struct Dependency: Equatable {
     public var codeSign: Bool = true
     public var removeHeaders: Bool = true
     public var link: Bool = true
+    public var implicit: Bool = false
 
-    public init(type: DependencyType, reference: String, embed: Bool? = nil, link: Bool = true) {
+    public init(type: DependencyType, reference: String, embed: Bool? = nil, link: Bool = true, implicit: Bool = false) {
         self.type = type
         self.reference = reference
         self.embed = embed
         self.link = link
+        self.implicit = implicit
     }
 
     public enum DependencyType {
@@ -69,7 +71,7 @@ extension Dependency: JSONObjectConvertible {
         }
 
         embed = jsonDictionary.json(atKeyPath: "embed")
-
+        
         if let bool: Bool = jsonDictionary.json(atKeyPath: "link") {
             link = bool
         }
@@ -79,5 +81,8 @@ extension Dependency: JSONObjectConvertible {
         if let bool: Bool = jsonDictionary.json(atKeyPath: "removeHeaders") {
             removeHeaders = bool
         }
+        if let bool: Bool = jsonDictionary.json(atKeyPath: "implicit") {
+            implicit = bool
+        }
     }
 }

Sources/XcodeGenKit/PBXProjGenerator.swift

@@ -276,8 +276,12 @@ public class PBXProjGenerator {
                 }
 
             case .framework:
-
-                let fileReference = sourceGenerator.getFileReference(path: Path(dependency.reference), inPath: spec.basePath)
+                let fileReference: String
+                if dependency.implicit {
+                    fileReference = sourceGenerator.getFileReference(path: Path(dependency.reference), inPath: spec.basePath, sourceTree: .buildProductsDir)
+                } else {
+                    fileReference = sourceGenerator.getFileReference(path: Path(dependency.reference), inPath: spec.basePath)
+                }
 
                 let buildFile = PBXBuildFile(reference: referenceGenerator.generate(PBXBuildFile.self, fileReference + target.name), fileRef: fileReference)
                 addObject(buildFile)