Update SwiftSyntax to 0.50600.0 (#3901)

Uses SwiftSyntax 5.5 on Linux when building with Swift 5.5. We use the 5.6 version of
SwiftSyntax when building with Swift 5.5 and 5.6 on macOS because we statically link
`lib_InternalSwiftSyntaxParser` thanks to
https://github.com/keith/StaticInternalSwiftSyntaxParser/releases/tag/5.6.

This keeps SwiftLint binaries portable across machines on macOS, regardless of
_where_ or even _if_ `lib_InternalSwiftSyntaxParser` is installed.

* Run TSan CI job with `--configuration release` to avoid stack overflows
* Add Swift 5.6 CI job
* Fix linker settings

Package.resolved

@@ -21,10 +21,10 @@
       },
       {
         "package": "SwiftSyntax",
-        "repositoryURL": "https://github.com/apple/swift-syntax.git",
+        "repositoryURL": "https://github.com/apple/swift-syntax",
         "state": {
-          "branch": null,
-          "revision": "cf40be70deaf4ce7d44eb1a7e14299c391e2363f",
+          "branch": "0.50600.0",
+          "revision": "0467d94e8123071e8e6c24039aadb405318f1838",
           "version": null
         }
       },

Package.swift

@@ -1,18 +1,29 @@
 // swift-tools-version:5.5
 import PackageDescription
 
-#if canImport(CommonCrypto)
-private let addCryptoSwift = false
-#else
-private let addCryptoSwift = true
-#endif
-
 #if os(macOS)
+private let addCryptoSwift = false
 private let staticSwiftSyntax = true
 #else
+private let addCryptoSwift = true
 private let staticSwiftSyntax = false
 #endif
 
+#if os(Linux) && compiler(<5.6)
+private let swiftSyntaxFiveDotSix = false
+#else
+private let swiftSyntaxFiveDotSix = true
+#endif
+
+let frameworkDependencies: [Target.Dependency] = [
+    .product(name: "SourceKittenFramework", package: "SourceKitten"),
+    .product(name: "SwiftSyntax", package: "SwiftSyntax"),
+    "Yams",
+]
++ (addCryptoSwift ? ["CryptoSwift"] : [])
++ (staticSwiftSyntax ? ["lib_InternalSwiftSyntaxParser"] : [])
++ (swiftSyntaxFiveDotSix ? [.product(name: "SwiftSyntaxParser", package: "SwiftSyntax")] : [])
+
 let package = Package(
     name: "SwiftLint",
     platforms: [.macOS(.v10_12)],
@@ -23,7 +34,7 @@ let package = Package(
     dependencies: [
         .package(name: "swift-argument-parser", url: "https://github.com/apple/swift-argument-parser.git", .upToNextMinor(from: "1.0.3")),
         .package(name: "SwiftSyntax", url: "https://github.com/apple/swift-syntax.git",
-                 .revision("cf40be70deaf4ce7d44eb1a7e14299c391e2363f")),
+                 .revision(swiftSyntaxFiveDotSix ? "0467d94e8123071e8e6c24039aadb405318f1838" : "cf40be70deaf4ce7d44eb1a7e14299c391e2363f")),
         .package(url: "https://github.com/jpsim/SourceKitten.git", from: "0.32.0"),
         .package(url: "https://github.com/jpsim/Yams.git", from: "4.0.2"),
         .package(url: "https://github.com/scottrhoyt/SwiftyTextTable.git", from: "0.9.0"),
@@ -39,13 +50,11 @@ let package = Package(
         ),
         .target(
             name: "SwiftLintFramework",
-            dependencies: [
-                .product(name: "SourceKittenFramework", package: "SourceKitten"),
-                "SwiftSyntax",
-                "Yams",
-            ]
-            + (addCryptoSwift ? ["CryptoSwift"] : [])
-            + (staticSwiftSyntax ? ["lib_InternalSwiftSyntaxParser"] : [])
+            dependencies: frameworkDependencies,
+            // Pass `-dead_strip_dylibs` to ignore the dynamic version of `lib_InternalSwiftSyntaxParser`
+            // that ships with SwiftSyntax because we want the static version from
+            // `StaticInternalSwiftSyntaxParser`.
+            linkerSettings: staticSwiftSyntax ? [.unsafeFlags(["-Xlinker", "-dead_strip_dylibs"])] : []
         ),
         .testTarget(
             name: "SwiftLintFrameworkTests",
@@ -58,7 +67,7 @@ let package = Package(
         ),
     ] + (staticSwiftSyntax ? [.binaryTarget(
             name: "lib_InternalSwiftSyntaxParser",
-            url: "https://github.com/keith/StaticInternalSwiftSyntaxParser/releases/download/5.5.2/lib_InternalSwiftSyntaxParser.xcframework.zip",
-            checksum: "96bbc9ab4679953eac9ee46778b498cb559b8a7d9ecc658e54d6679acfbb34b8"
+            url: "https://github.com/keith/StaticInternalSwiftSyntaxParser/releases/download/5.6/lib_InternalSwiftSyntaxParser.xcframework.zip",
+            checksum: "88d748f76ec45880a8250438bd68e5d6ba716c8042f520998a438db87083ae9d"
         )] : [])
 )

Source/SwiftLintFramework/Extensions/SwiftLintFile+Cache.swift

@@ -1,6 +1,9 @@
 import Foundation
 import SourceKittenFramework
 import SwiftSyntax
+#if canImport(SwiftSyntaxParser)
+import SwiftSyntaxParser
+#endif
 
 private typealias FileCacheKey = UUID
 private var responseCache = Cache({ file -> [String: SourceKitRepresentable]? in

azure-pipelines.yml

@@ -10,6 +10,8 @@ jobs:
     matrix:
       swift55:
         containerImage: swift:5.5
+      swift56:
+        containerImage: swift:5.6
   container: $[ variables['containerImage'] ]
   steps:
     - script: swift test --parallel
@@ -84,9 +86,11 @@ jobs:
   variables:
     DEVELOPER_DIR: /Applications/Xcode_13.2.1.app
   steps:
-    - script: swift run --sanitize=thread swiftlint lint --lenient
+    - script: swift build --configuration release --sanitize thread
+      displayName: Build SwiftLint
+    - script: swift run --configuration release --sanitize thread swiftlint lint --lenient
       displayName: Pre-cache SwiftLint Run
-    - script: swift run --sanitize=thread swiftlint lint --lenient
+    - script: swift run --configuration release --sanitize thread swiftlint lint --lenient
       displayName: Post-cache SwiftLint Run
     - script: make test_tsan
       displayName: Test With TSan