Plugin fails in Xcode Cloud: "You don’t have permission to save the file “Strings.swift” in the folder “SwiftGenPlugin”

[gereons]

Running the Swiftgen plugin in an Xcode Cloud build fails with the following errors:

Plug-in ended with non-zero exit code: 64)
xcodebuild: error: Failed to copy build products to test products file with error: The file “Products” couldn’t be opened because there is no such file.
It seems like there was an error running SwiftGen.
Error Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the file “Strings.swift” in the folder “SwiftGenPlugin”." UserInfo={NSURL=file:///Volumes/workspace/DerivedData/SourcePackages/plugins/assets.output/Assets/SwiftGenPlugin/Strings.swift, NSUserStringVariant=Folder, NSUnderlyingError=0x6000036c5ce0 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}

The Package.swift for our "Assets" Package looks like this:

// swift-tools-version: 5.9

import PackageDescription

let package = Package(
    name: "Assets",
    defaultLocalization: "de",
    platforms: [.iOS(.v17)],
    products: [
        .library(name: "Assets", targets: ["Assets"]),
    ],
    dependencies: [
        .package(url: "https://github.com/chrs1885/WCAG-Colors.git", from: "1.0.0"),
        .package(url: "https://github.com/SwiftGen/SwiftGenPlugin", from: "6.6.0")
    ],
    targets: [
        .target(
            name: "Assets",
            dependencies: ["WCAG-Colors"],
            path: "Sources",
            resources: [.copy("Resources/dummy.txt")],
            plugins: [
                .plugin(name: "SwiftGenPlugin", package: "SwiftGenPlugin")
            ]
        ),
    ]
)

and swiftgen.yml is

xcassets:
  inputs: Sources/Resources/Assets.xcassets
  outputs:
    templateName: swift5
    output: ${DERIVED_SOURCES_DIR}/Assets.swift
    params:
      publicAccess: true

strings:
  inputs: Sources/Resources/de.lproj/Localizable.strings
  outputs:
    templateName: structured-swift5
    output: ${DERIVED_SOURCES_DIR}/Strings.swift
    params:
      publicAccess: true

(Possibly related to #12 and/or #13?)

[parvez-keeptruckin]

I am also facing this issue.

[akankshakitman]

Did you find any solution to this issue?

[gereons]

For the time being, we've reverted to run swiftgen locally (in a run phase and using kicker) and committing the generated files to git.

[shadone]

It seems to be a bug in SPM + Xcode Cloud, the fix seems to be implemented but not released yet swiftlang/swift-package-manager#6948

[shadone]

I tried to fix it with a quick fix, available in my private fork

The actual fix is in SwiftGen SwiftGen/SwiftGen#1102

Then I made a private release of a new binary version of SwiftGen CLI version 6.6.2+deriveddatafix (https://github.com/shadone/SwiftGen/releases/tag/6.6.2%2Bderiveddatafix)
And then there is a fork of SwiftGenPlugin to use that new version of SwiftGen CLI tool in a branch https://github.com/shadone/SwiftGenPlugin/tree/6.6.2%2Bderiveddatafix

This makes SwiftGenPlugin work for me in Xcode Cloud:

    dependencies: [
        .package(url: "https://github.com/shadone/SwiftGenPlugin", branch: "6.6.2+deriveddatafix"),