WIP: Verify that files generated with SwiftSyntaxBuilder match the checked-in state

Currently, we only verify that the gyb-generated files match the checked in source state. As more and more files are being generated using CodeGeneration, we should also verify them in CI.

rdar://103023853

Author: ahoppen

CodeGeneration/Package.swift

@@ -14,7 +14,7 @@ let package = Package(
   ],
   dependencies: [
     .package(url: "https://github.com/apple/swift-syntax.git", revision: "6e3dfb332553ad1462f0a3d45b4d91e349ce4013"),
-    .package(url: "https://github.com/apple/swift-argument-parser.git", .upToNextMinor(from: "1.1.4")),
+    // swift-argument-parser dependency is added below
   ],
   targets: [
     .executableTarget(
@@ -78,3 +78,14 @@ let package = Package(
     ),
   ]
 )
+
+if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
+  // Building standalone.
+  package.dependencies += [
+    .package(url: "https://github.com/apple/swift-argument-parser.git", .upToNextMinor(from: "1.1.4")),
+  ]
+} else {
+  package.dependencies += [
+    .package(path: "../swift-argument-parser")
+  ]
+}

CodeGeneration/Sources/generate-swiftideutils/SyntaxClassificationFile.swift

@@ -15,6 +15,7 @@ import SwiftSyntaxBuilder
 import SyntaxSupport
 import Utils
 
+
 // Collects the list of classifications to use for contextual classification.
 var node_child_classifications: [ChildClassification] {
   var result = [ChildClassification]()

build-script.py

@@ -370,6 +370,7 @@ def run_code_generation(
 
         env = dict(os.environ)
         env["SWIFT_BUILD_SCRIPT_ENVIRONMENT"] = "1"
+        env["SWIFTCI_USE_LOCAL_DEPS"] = "1"
         check_call(swiftpm_call, env=env, verbose=verbose)
 
 
@@ -741,7 +742,7 @@ def verify_source_code_command(args: argparse.Namespace) -> None:
     try:
         verify_gyb_generated_files(args.gyb_exec, verbose=args.verbose)
 
-        if not args.gyb_only:
+        if not args.gyb_only or True:
             verify_code_generated_files(
                 toolchain=args.toolchain,
                 verbose=args.verbose,