Report errors in Package.swift in problems view

[adam-fowler]

If swift package describe returns errors we should report these in the problems view

[adam-fowler]

This could be resolved by #25 which posts errors created by the resolve operation

[adam-fowler]

This is problematic as swift package resolve does not return errors in a standard format. We cannot extract the file name for the Package.swift from the error given it only includes the folder the Package.swift is in

[tomerd]

@adam-fowler can you tell us more about the kind of structured information you would want? maybe that is something we can add / change in SwiftPM

cc @abertelrud

[adam-fowler]

@adam-fowler can you tell us more about the kind of structured information you would want? maybe that is something we can add / change in SwiftPM

cc @abertelrud

Most error strings are of the format.

${filename}:${linenumber}:${column}: [error/warning]: ${message}

This is the kind of error a problem matcher is expecting. It uses regular expressions to extract all the details it needs. Syntax errors in a Package.swift produce something similar.

If you have something like a version clash or bad dependency in a Package.swift you get an error in a different form

$(folder) error: ${message}

I can't extract the Package.swift filename from this.

There are two things that'd help here

1. The error string should always include the full filename (not just the folder). This is a simple change
2. If you can extract the offending line, column numbers for version clashes etc report that as well. This I imagine is not so easy

[AppAppWorks]

I've created swiftlang/swift-package-manager#7947 and will likely implement it myself if I could :)
Hopefully I could turn $(folder) error: ${message} into ${filename}:${linenumber}:${column}: [error/warning]: ${message} given that swift-syntax is already a dependency of SPM.