Add unit test and example

Tests/Fixtures/TestProject/ContentBlocker/Configs/legacy/Debug.xcconfig

@@ -0,0 +1 @@
+API_PATH = https://dev.google.com

Tests/Fixtures/TestProject/ContentBlocker/Configs/legacy/Release.xcconfig

@@ -0,0 +1 @@
+API_PATH = https://release.google.com

Tests/Fixtures/TestProject/ContentBlocker/ContentBlockerRequestHandler.swift

@@ -0,0 +1,22 @@
+//
+//  ContentBlockerRequestHandler.swift
+//  ContentBlocker
+//
+//  Created by Thanh Vu on 31/10/2023.
+//
+
+import UIKit
+import MobileCoreServices
+
+class ContentBlockerRequestHandler: NSObject, NSExtensionRequestHandling {
+
+    func beginRequest(with context: NSExtensionContext) {
+        let attachment = NSItemProvider(contentsOf: Bundle.main.url(forResource: "blockerList", withExtension: "json"))!
+        
+        let item = NSExtensionItem()
+        item.attachments = [attachment]
+        
+        context.completeRequest(returningItems: [item], completionHandler: nil)
+    }
+    
+}

Tests/Fixtures/TestProject/ContentBlocker/Info.plist

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.Safari.content-blocker</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).ContentBlockerRequestHandler</string>
+	</dict>
+</dict>
+</plist>

Tests/Fixtures/TestProject/ContentBlocker/blockerList.json

@@ -0,0 +1,10 @@
+[
+    {
+        "action": {
+            "type": "block"
+        },
+        "trigger": {
+            "url-filter": "webkit.svg"
+        }
+    }
+]

Tests/Fixtures/TestProject/project.yml

@@ -16,6 +16,11 @@ options:
       buildPhase: none
     abcd:
       buildPhase: none
+globalTemplateAttributes:
+  version: legacy
+configs:
+  Debug: debug
+  Release: release
 fileGroups:
   - Configs
   - FileGroup
@@ -79,7 +84,9 @@ targets:
     legacy:
       toolPath: /usr/bin/true
       passSettings: true
-
+  ContentBlocker:
+    templates:
+      - ContentBlockerTemplate
   App_macOS:
     type: application
     platform: macOS
@@ -497,6 +504,16 @@ schemes:
 targetTemplates:
   MyTemplate:
     scheme: {}
+  ContentBlockerTemplate:
+    platform: iOS
+    type: app-extension
+    settings:
+      CODE_SIGN_IDENTITY: Apple Development
+    configFiles:
+      Debug: ContentBlocker/Configs/${version}/Debug.xcconfig
+      Release: ContentBlocker/Configs/${version}/Release.xcconfig
+    sources:
+      - ContentBlocker
 aggregateTargets:
   SuperTarget:
     attributes:

Tests/Fixtures/global_template_attributes_test.yml

@@ -0,0 +1,28 @@
+targetTemplates:
+  ContentBlockerTemplate:
+    platform: iOS
+    type: app-extension
+    settings:
+      CODE_SIGN_IDENTITY: Apple Development
+    configFiles:
+      Debug: ContentBlocker/Configs/${version}/Debug.xcconfig
+      Release: ContentBlocker/Configs/${version}/Release.xcconfig
+    sources:
+      - ContentBlocker
+
+globalTemplateAttributes:
+  version: legacy
+
+name: Demo
+options:
+  createIntermediateGroups: True
+targets:
+  Demo:
+    type: application
+    platform: iOS
+    deploymentTarget: "10.0"
+    sources:
+      - DemoXcodeGenGlobalTemplateAttribute
+  ContentBlocker:
+    templates:
+      - ContentBlockerTemplate

Tests/ProjectSpecTests/SpecLoadingTests.swift

@@ -285,6 +285,15 @@ class SpecLoadingTests: XCTestCase {
                 ]
                 try expect(project.targets.last?.sources) == ["SomeTarget", "doesWin", "templateVariable"]
             }
+
+            $0.it("lookup global template attributes") {
+                let path = fixturePath + "global_template_attributes_test.yml"
+
+                let project = try loadSpec(path: path)
+                let extensionTarget = project.targets.first!
+                try expect(extensionTarget.configFiles["Debug"]) == "ContentBlocker/Configs/legacy/Debug.xcconfig"
+                try expect(extensionTarget.configFiles["Release"]) == "ContentBlocker/Configs/legacy/Release.xcconfig"
+            }
         }
     }