How to contribute to the Swift Package Manager?

Development Package Manager
1

i’m currently trying to help my swift mentorship program mentee make her first contribution to the SPM, and it is not going well because i myself am not able to build the package manager from source on main; it appears something is broken in its TSC dependency:

/swift/swift-package-manager/Sources/Basics/FileSystem/FileSystem+Extensions.swift:23:13: error: enum 'FileSystemAttribute' does not exist in module 'TSCBasic'
import enum TSCBasic.FileSystemAttribute
            ^        ~~~~~~~~~~~~~~~~~~~
/swift/swift-package-manager/Sources/Basics/FileSystem/FileSystem+Extensions.swift:75:38: error: cannot find type 'FileSystemAttribute' in scope
    public func hasAttribute(_ name: FileSystemAttribute, _ path: AbsolutePath) -> Bool {
                                     ^~~~~~~~~~~~~~~~~~~
/swift/swift-package-manager/Sources/Basics/FileSystem/FileSystem+Extensions.swift:206:62: error: cannot convert value of type 'TSCAbsolutePath' (aka 'AbsolutePath') to expected argument type 'AbsolutePath'
        return try self.itemReplacementDirectories(for: path.underlying).compactMap { AbsolutePath($0) }
                                                             ^
/swift/swift-package-manager/Sources/Basics/FileSystem/FileSystem+Extensions.swift:206:100: error: cannot convert value of type 'AbsolutePath' to expected argument type 'TSCAbsolutePath' (aka 'AbsolutePath')
        return try self.itemReplacementDirectories(for: path.underlying).compactMap { AbsolutePath($0) }
                                                                                                   ^
/swift/swift-package-manager/Sources/Basics/FileSystem/FileSystem+Extensions.swift:561:53: error: value of type 'any WritableByteStream' has no member 'send'
        try self.writeFileContents(path, body: { $0.send(bytes) })
                                                 ~~ ^~~~
/swift/swift-package-manager/Sources/Basics/FileSystem/FileSystem+Extensions.swift:23:13: error: enum 'FileSystemAttribute' does not exist in module 'TSCBasic'
import enum TSCBasic.FileSystemAttribute

this smells like a wrong-resolved-dependency version problem, but unfortunately, the Package.resolved pins have not been checked-in to that repository, so i have no straightforward way of constraining the build to only use compatible versions of swift-tools-support-core.

any guidance on how to proceed would be appreciated!

1 Like
2

Sounds like an out-of-date TSC dependency, did swift package update not help?

1 Like
3

aha, that fixed it! for some reason i thought swift package resolve would update the pins as well. thanks!