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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Successful build of FileKit, reference master (9d3ddb), with Swift 6.0 for macOS (SPM) on 11 Oct 2024 04:17:40 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.0.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.55.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Kitura/FileKit.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Kitura/FileKit
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 9d3ddb8 Update dependency (LoggerAPI 2.0.0); Update README to reflect Swift 5.2 minimum requirement (#16)
Cloned https://github.com/Kitura/FileKit.git
Revision (git rev-parse @):
9d3ddb89a16d388eaad0db5e17c4682b767bd48f
SUCCESS checkout https://github.com/Kitura/FileKit.git at master
Fetching https://github.com/Kitura/LoggerAPI.git
[1/771] Fetching loggerapi
Fetched https://github.com/Kitura/LoggerAPI.git from cache (1.09s)
Computing version for https://github.com/Kitura/LoggerAPI.git
Computed https://github.com/Kitura/LoggerAPI.git at 2.0.0 (0.63s)
Fetching https://github.com/apple/swift-log.git
[1/3619] Fetching swift-log
Fetched https://github.com/apple/swift-log.git from cache (1.05s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.6.1 (0.46s)
Creating working copy for https://github.com/Kitura/LoggerAPI.git
Working copy of https://github.com/Kitura/LoggerAPI.git resolved at 2.0.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.6.1
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "filekit",
      "name": "FileKit",
      "url": "https://github.com/Kitura/FileKit.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/FileKit",
      "dependencies": [
        {
          "identity": "loggerapi",
          "name": "LoggerAPI",
          "url": "https://github.com/Kitura/LoggerAPI.git",
          "version": "2.0.0",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/LoggerAPI",
          "dependencies": [
            {
              "identity": "swift-log",
              "name": "swift-log",
              "url": "https://github.com/apple/swift-log.git",
              "version": "1.6.1",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-log",
              "dependencies": [
              ]
            }
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/Kitura/FileKit.git
[1/298] Fetching filekit
Fetched https://github.com/Kitura/FileKit.git from cache (1.00s)
Fetching https://github.com/Kitura/LoggerAPI.git from cache
Fetched https://github.com/Kitura/LoggerAPI.git from cache (0.48s)
Computing version for https://github.com/Kitura/LoggerAPI.git
Computed https://github.com/Kitura/LoggerAPI.git at 2.0.0 (0.02s)
Fetching https://github.com/apple/swift-log.git from cache
Fetched https://github.com/apple/swift-log.git from cache (0.61s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.6.1 (0.03s)
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.6.1
Creating working copy for https://github.com/Kitura/FileKit.git
Working copy of https://github.com/Kitura/FileKit.git resolved at master (9d3ddb8)
Creating working copy for https://github.com/Kitura/LoggerAPI.git
Working copy of https://github.com/Kitura/LoggerAPI.git resolved at 2.0.0
warning: '.resolve-product-dependencies': dependency 'filekit' is not used by any target
Found 1 product dependencies
  - LoggerAPI
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/Kitura/FileKit.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.0.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version--4A847ED0836F2485.txt
[5/9] Compiling Logging MetadataProvider.swift
[6/9] Compiling Logging Locks.swift
[7/9] Emitting module Logging
[8/9] Compiling Logging Logging.swift
[9/9] Compiling Logging LogHandler.swift
[10/11] Emitting module LoggerAPI
[11/11] Compiling LoggerAPI Logger.swift
[12/13] Compiling FileKit FileKit.swift
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/FileKit/FileKit.swift:178:24: warning: static property 'projectHeadIterator' is not concurrency-safe because non-'Sendable' type '(URL) -> URL?' may have shared mutable state; this is an error in the Swift 6 language mode
176 |
177 |     /// Takes a starting directory and iterates down the tree to find package.swift (the root directory)
178 |     private static let projectHeadIterator = { (startingDir: URL) -> URL? in
    |                        |- warning: static property 'projectHeadIterator' is not concurrency-safe because non-'Sendable' type '(URL) -> URL?' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'projectHeadIterator' with '@MainActor' if property should only be accessed from the main actor
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
179 |         let fileManager = FileManager()
180 |         var startingDir = startingDir.appendingPathComponent("dummy")
[13/13] Emitting module FileKit
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/FileKit/FileKit.swift:178:24: warning: static property 'projectHeadIterator' is not concurrency-safe because non-'Sendable' type '(URL) -> URL?' may have shared mutable state; this is an error in the Swift 6 language mode
176 |
177 |     /// Takes a starting directory and iterates down the tree to find package.swift (the root directory)
178 |     private static let projectHeadIterator = { (startingDir: URL) -> URL? in
    |                        |- warning: static property 'projectHeadIterator' is not concurrency-safe because non-'Sendable' type '(URL) -> URL?' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'projectHeadIterator' with '@MainActor' if property should only be accessed from the main actor
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
179 |         let fileManager = FileManager()
180 |         var startingDir = startingDir.appendingPathComponent("dummy")
Build complete! (8.77s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "loggerapi",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Kitura/LoggerAPI.git"
    }
  ],
  "manifest_display_name" : "FileKit",
  "name" : "FileKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "FileKit",
      "targets" : [
        "FileKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FileKitTests",
      "module_type" : "SwiftTarget",
      "name" : "FileKitTests",
      "path" : "Tests/FileKitTests",
      "sources" : [
        "FileKitTests.swift"
      ],
      "target_dependencies" : [
        "FileKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FileKit",
      "module_type" : "SwiftTarget",
      "name" : "FileKit",
      "path" : "Sources/FileKit",
      "product_dependencies" : [
        "LoggerAPI"
      ],
      "product_memberships" : [
        "FileKit"
      ],
      "sources" : [
        "FileKit.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
Done.