Support PBXGroup build file elements eg localized variants (#35)

* Add localized file to ExampleProject and associated test

* Refactor PBXBuildFile.path(projectFolder:) to leverage guard statements

* Refactor PBXBuildFile.path(projectFolder:) to return an array of paths

* Support PBXGroup build file elements eg localized variants

Sources/DependencyCalculator/DependencyGraph.swift

@@ -10,23 +10,41 @@ import Workspace
 import XcodeProj
 
 extension PBXBuildFile {
-    func path(projectFolder: Path) -> Path? {
-        if let path = file?.path {
-            var intermediatePath = Path()
+    func paths(projectFolder: Path) -> [Path] {
+        guard let file else {
+            Logger.warning("PBXBuildFile without file: self=\(self), \n self.product=\(String(describing: product))")
+            return []
+        }
+
+        let paths: [String] = switch file {
+        case let group as PBXGroup:
+            group.children.compactMap { $0.path }
+        default:
+            if let path = file.path {
+                [path]
+            } else {
+                []
+            }
+        }
+
+        guard paths.count > 0 else {
+            Logger.warning("File without paths: self=\(self), \n self.file=\(String(describing: file)), \n self.product=\(String(describing: product))")
+            return []
+        }
+
+        var intermediatePath = Path()
 
-            var parent = file?.parent
+        var parent = file.parent
 
-            while parent?.path != nil {
-                if let parentPath = parent?.path {
-                    intermediatePath = Path(parentPath) + intermediatePath
-                }
-                parent = parent?.parent
+        while parent?.path != nil {
+            if let parentPath = parent?.path {
+                intermediatePath = Path(parentPath) + intermediatePath
             }
+            parent = parent?.parent
+        }
 
-            return projectFolder + intermediatePath + path
-        } else {
-            Logger.warning("File without path: self=\(self), \n self.file=\(String(describing: file)), \n self.product=\(String(describing: product))")
-            return nil
+        return paths.map {
+            projectFolder + intermediatePath + $0
         }
     }
 }
@@ -284,13 +302,13 @@ extension WorkspaceInfo {
             }
 
             // Source Files
-            var filesPaths = try Set(target.sourcesBuildPhase()?.files?.compactMap { file in
-                file.path(projectFolder: path.parent())
+            var filesPaths = try Set(target.sourcesBuildPhase()?.files?.flatMap { file in
+                file.paths(projectFolder: path.parent())
             } ?? [])
 
             // Resources
-            filesPaths = try filesPaths.union(Set(target.resourcesBuildPhase()?.files?.compactMap { file in
-                file.path(projectFolder: path.parent())
+            filesPaths = try filesPaths.union(Set(target.resourcesBuildPhase()?.files?.flatMap { file in
+                file.paths(projectFolder: path.parent())
             } ?? []))
 
             // Establish dependencies based on linked frameworks build phase

Tests/SelectiveTestingTests/ExampleProject/ExampleProject.xcodeproj/project.pbxproj

@@ -22,6 +22,7 @@
 		27F4680529B145A700A93E94 /* ExampleLibrary.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 27F4680429B145A700A93E94 /* ExampleLibrary.framework */; };
 		27F4680929B145F900A93E94 /* ExampleTargetLibrary.swift in Sources */ = {isa = PBXBuildFile; fileRef = 27F4680829B145F900A93E94 /* ExampleTargetLibrary.swift */; };
 		27F4680C29B1482E00A93E94 /* ExamplePackage in Frameworks */ = {isa = PBXBuildFile; productRef = 27F4680B29B1482E00A93E94 /* ExamplePackage */; };
+		B24BBDBD2CAD7228005E6DAC /* Example.xib in Resources */ = {isa = PBXBuildFile; fileRef = B24BBDBC2CAD7228005E6DAC /* Example.xib */; };
 		FDE924012A5C5AC300D61FD3 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FDE924002A5C5AC300D61FD3 /* ContentView.swift */; };
 /* End PBXBuildFile section */
 
@@ -88,6 +89,8 @@
 		27F4680429B145A700A93E94 /* ExampleLibrary.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = ExampleLibrary.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		27F4680829B145F900A93E94 /* ExampleTargetLibrary.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ExampleTargetLibrary.swift; sourceTree = "<group>"; };
 		27F4680A29B1469D00A93E94 /* ExamplePackage */ = {isa = PBXFileReference; lastKnownFileType = wrapper; path = ExamplePackage; sourceTree = "<group>"; };
+		B24BBDBB2CAD7228005E6DAC /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/Example.xib; sourceTree = "<group>"; };
+		B24BBDBF2CAD7244005E6DAC /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/Example.strings; sourceTree = "<group>"; };
 		FDE924002A5C5AC300D61FD3 /* ContentView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -167,6 +170,7 @@
 				FDE923FE2A5C5AC300D61FD3 /* Deep */,
 				276DB5C229B144C900E5C615 /* Assets.xcassets */,
 				276DB5C429B144C900E5C615 /* Preview Content */,
+				B24BBDBC2CAD7228005E6DAC /* Example.xib */,
 			);
 			path = ExampleProject;
 			sourceTree = "<group>";
@@ -405,6 +409,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				B24BBDBD2CAD7228005E6DAC /* Example.xib in Resources */,
 				276DB5C629B144C900E5C615 /* Preview Assets.xcassets in Resources */,
 				276DB5C329B144C900E5C615 /* Assets.xcassets in Resources */,
 			);
@@ -509,6 +514,18 @@
 		};
 /* End PBXTargetDependency section */
 
+/* Begin PBXVariantGroup section */
+		B24BBDBC2CAD7228005E6DAC /* Example.xib */ = {
+			isa = PBXVariantGroup;
+			children = (
+				B24BBDBB2CAD7228005E6DAC /* Base */,
+				B24BBDBF2CAD7244005E6DAC /* en */,
+			);
+			name = Example.xib;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
 /* Begin XCBuildConfiguration section */
 		276DB5DD29B144CA00E5C615 /* Debug */ = {
 			isa = XCBuildConfiguration;

Tests/SelectiveTestingTests/ExampleProject/ExampleProject/Base.lproj/Example.xib

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="13142" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12042"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+    </objects>
+</document>

Tests/SelectiveTestingTests/ExampleProject/ExampleProject/en.lproj/Example.strings

@@ -0,0 +1 @@
+

Tests/SelectiveTestingTests/SelectiveTestingProjectTests.swift

@@ -71,4 +71,20 @@ final class SelectiveTestingProjectTests: XCTestCase {
             testTool.mainProjectUITests,
         ]))
     }
+
+    func testProjectLocalizedPathChange() async throws {
+        // given
+        let tool = try testTool.createSUT(config: nil,
+                                          basePath: "ExampleProject.xcodeproj")
+        // when
+        try testTool.changeFile(at: testTool.projectPath + "ExampleProject/Base.lproj/Example.xib")
+
+        // then
+        let result = try await tool.run()
+        XCTAssertEqual(result, Set([
+            testTool.mainProjectMainTarget,
+            testTool.mainProjectTests,
+            testTool.mainProjectUITests,
+        ]))
+    }
 }