Fix error message output (#142)

.github/workflows/swift.yml

@@ -15,10 +15,11 @@ jobs:
       - name: Build on macOS 10.15 with Swift 5.2
         run: |
           sudo xcode-select --switch /Applications/Xcode_11.7.app/Contents/Developer
-          swift build
+          swift test -c release --enable-test-discovery
+          swift build -c release
           brew bundle
-          cd TestApp && ../.build/debug/carton test
-          ../.build/debug/carton bundle
+          cd TestApp && ../.build/release/carton test
+          ../.build/release/carton bundle
         # the token is required to get around GitHub API limits when downloading the toolchain
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -31,10 +32,11 @@ jobs:
       - name: Build on macOS 11.0 with Swift 5.2
         run: |
           sudo xcode-select --switch /Applications/Xcode_11.7.app/Contents/Developer
-          swift build
+          swift test -c release --enable-test-discovery
+          swift build -c release
           brew bundle
-          cd TestApp && ../.build/debug/carton test
-          ../.build/debug/carton bundle
+          cd TestApp && ../.build/release/carton test
+          ../.build/release/carton bundle
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -46,10 +48,11 @@ jobs:
       - name: Build on macOS 10.15 with Swift 5.3
         run: |
           sudo xcode-select --switch /Applications/Xcode_12.app/Contents/Developer
-          swift build
+          swift test -c release --enable-test-discovery
+          swift build -c release
           brew bundle
-          cd TestApp && ../.build/debug/carton test
-          ../.build/debug/carton bundle
+          cd TestApp && ../.build/release/carton test
+          ../.build/release/carton bundle
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -61,10 +64,11 @@ jobs:
       - name: Build on macOS 11.0 with Swift 5.3
         run: |
           sudo xcode-select --switch /Applications/Xcode_12.1.app/Contents/Developer
-          swift build
+          swift test -c release --enable-test-discovery
+          swift build -c release
           brew bundle
-          cd TestApp && ../.build/debug/carton test
-          ../.build/debug/carton bundle
+          cd TestApp && ../.build/release/carton test
+          ../.build/release/carton bundle
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -76,12 +80,13 @@ jobs:
 
       - name: Build on Ubuntu 18.04 with Swift 5.3
         run: |
-          swift build
+          swift test -c release --enable-test-discovery
+          swift build -c release
           sudo ./install_ubuntu_deps.sh
           curl https://get.wasmer.io -sSfL | sh
           source /home/runner/.wasmer/wasmer.sh
-          cd TestApp && ../.build/debug/carton test
-          ../.build/debug/carton bundle
+          cd TestApp && ../.build/release/carton test
+          ../.build/release/carton bundle
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -93,12 +98,13 @@ jobs:
 
       - name: Build on Ubuntu 20.04 with Swift 5.3
         run: |
-          swift build
+          swift test -c release --enable-test-discovery
+          swift build -c release
           sudo ./install_ubuntu_deps.sh
           curl https://get.wasmer.io -sSfL | sh
           source /home/runner/.wasmer/wasmer.sh
-          cd TestApp && ../.build/debug/carton test
-          ../.build/debug/carton bundle
+          cd TestApp && ../.build/release/carton test
+          ../.build/release/carton bundle
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 

Package.swift

@@ -77,7 +77,11 @@ let package = Package(
     ),
     .testTarget(
       name: "CartonTests",
-      dependencies: ["carton"]
+      dependencies: [
+        "carton",
+        "CartonHelpers",
+        .product(name: "SwiftToolsSupport-auto", package: "swift-tools-support-core"),
+      ]
     ),
   ]
 )

Sources/CartonHelpers/DiagnosticsParser.swift

@@ -88,7 +88,7 @@ private struct TerminalOutputFormat: OutputFormat {
 /// The compiler output often repeats iteself, and the diagnostics can sometimes be
 /// difficult to read.
 /// This reformats them to a more readable output.
-struct DiagnosticsParser {
+public struct DiagnosticsParser {
   // swiftlint:disable force_try
   enum Regex {
     /// The output has moved to a new file
@@ -105,7 +105,7 @@ struct DiagnosticsParser {
     let line: String.SubSequence
     let char: String.SubSequence
     let code: String
-    let message: String.SubSequence
+    let message: String
 
     enum Kind: String {
       case error, warning, note
@@ -121,7 +121,9 @@ struct DiagnosticsParser {
 
   fileprivate static let highlighter = SyntaxHighlighter(format: TerminalOutputFormat())
 
-  func parse(_ output: String, _ terminal: InteractiveWriter) {
+  public init() {}
+
+  public func parse(_ output: String, _ terminal: InteractiveWriter) {
     let lines = output.split(separator: "\n")
     var lineIdx = 0
 
@@ -157,7 +159,7 @@ struct DiagnosticsParser {
                 line: components[0],
                 char: components[1],
                 code: String(lines[lineIdx]),
-                message: components[3]
+                message: components.dropFirst(3).joined(separator: ":")
               )
             )
           }

Tests/CartonTests/CartonTests.swift

@@ -1,8 +1,22 @@
+import CartonHelpers
 import class Foundation.Bundle
+import TSCBasic
 import XCTest
 
 final class CartonTests: XCTestCase {
-  func testExample() throws {
+  /// Returns path to the built products directory.
+  var productsDirectory: URL {
+    #if os(macOS)
+    for bundle in Bundle.allBundles where bundle.bundlePath.hasSuffix(".xctest") {
+      return bundle.bundleURL.deletingLastPathComponent()
+    }
+    fatalError("couldn't find the products directory")
+    #else
+    return Bundle.main.bundleURL
+    #endif
+  }
+
+  func testVersion() throws {
     // This is an example of a functional test case.
     // Use XCTAssert and related functions to verify your tests produce the correct
     // results.
@@ -20,28 +34,66 @@ final class CartonTests: XCTestCase {
     let pipe = Pipe()
     process.standardOutput = pipe
 
+    process.arguments = ["--version"]
     try process.run()
     process.waitUntilExit()
 
     let data = pipe.fileHandleForReading.readDataToEndOfFile()
     let output = String(data: data, encoding: .utf8)
 
-    XCTAssertEqual(output, "Hello, world!\n")
+    XCTAssertEqual(output?.trimmingCharacters(in: .whitespacesAndNewlines), "0.7.1")
   }
 
-  /// Returns path to the built products directory.
-  var productsDirectory: URL {
-    #if os(macOS)
-    for bundle in Bundle.allBundles where bundle.bundlePath.hasSuffix(".xctest") {
-      return bundle.bundleURL.deletingLastPathComponent()
-    }
-    fatalError("couldn't find the products directory")
-    #else
-    return Bundle.main.bundleURL
-    #endif
+  final class TestOutputStream: OutputByteStream {
+    var bytes: [UInt8] = []
+    var currentOutput: String {
+      String(bytes: bytes, encoding: .utf8)!
     }
 
-  static var allTests = [
-    ("testExample", testExample),
-  ]
+    var position: Int = 0
+
+    init() {}
+
+    func flush() {}
+
+    func write(_ byte: UInt8) {
+      bytes.append(byte)
+    }
+
+    func write<C>(_ bytes: C) where C: Collection, C.Element == UInt8 {
+      self.bytes.append(contentsOf: bytes)
+    }
+  }
+
+  func testDiagnosticsParser() {
+    // swiftlint:disable line_length
+    let testDiagnostics = """
+    [1/1] Compiling TokamakCore Font.swift
+    /Users/username/Project/Sources/TokamakCore/Tokens/Font.swift:58:15: error: invalid redeclaration of 'resolve(in:)'
+      public func resolve(in environment: EnvironmentValues) -> _Font {
+                  ^
+    /Users/username/Project/Sources/TokamakCore/Tokens/Font.swift:55:15: note: 'resolve(in:)' previously declared here
+      public func resolve(in environment: EnvironmentValues) -> _Font {
+                  ^
+    """
+    let expectedOutput = """
+    \u{001B}[1m\u{001B}[7m Font.swift \u{001B}[0m /Users/username/Project/Sources/TokamakCore/Tokens/Font.swift:58
+
+      \u{001B}[41;1m\u{001B}[37;1m ERROR \u{001B}[0m  invalid redeclaration of 'resolve(in:)'
+      \u{001B}[36m58 | \u{001B}[0m   \u{001B}[35;1mpublic\u{001B}[0m \u{001B}[35;1mfunc\u{001B}[0m resolve(in environment: \u{001B}[94mEnvironmentValues\u{001B}[0m) -> \u{001B}[94m_Font\u{001B}[0m {
+         |                ^
+
+      \u{001B}[7m\u{001B}[37;1m NOTE \u{001B}[0m  'resolve(in:)' previously declared here
+      \u{001B}[36m55 | \u{001B}[0m   \u{001B}[35;1mpublic\u{001B}[0m \u{001B}[35;1mfunc\u{001B}[0m resolve(in environment: \u{001B}[94mEnvironmentValues\u{001B}[0m) -> \u{001B}[94m_Font\u{001B}[0m {
+         |                ^
+
+
+
+    """
+    // swiftlint:enable line_length
+    let stream = TestOutputStream()
+    let writer = InteractiveWriter(stream: stream)
+    DiagnosticsParser().parse(testDiagnostics, writer)
+    XCTAssertEqual(stream.currentOutput, expectedOutput)
+  }
 }

Tests/CartonTests/XCTestManifests.swift

@@ -1,9 +0,0 @@
-import XCTest
-
-#if !canImport(ObjectiveC)
-public func allTests() -> [XCTestCaseEntry] {
-  [
-    testCase(CartonTests.allTests),
-  ]
-}
-#endif

Tests/LinuxMain.swift

@@ -1,6 +1 @@
-import CartonTests
-import XCTest
-
-var tests = [XCTestCaseEntry]()
-tests += CartonTests.allTests()
-XCTMain(tests)
+fatalError("Use `swift test --enable-test-discovery` to run tests")