[SR-13594] report terminal as a tty if under ConPty

[compnerd]

Previous ID	SR-13594
Radar	None
Original Reporter	@compnerd
Type	Improvement
Status	Resolved
Resolution	Done

Additional Detail from JIRA

Votes	0
Component/s	Package Manager
Labels	Improvement, StarterBug, Windows
Assignee	@compnerd
Priority	Medium

md5: 29d792b132138ce620d7de1cae69487a

Issue Description:

We should report a property tty when running under ConPty and not being redirected. Currently we always report a dumb terminal to ensure compatibility with the old windows console.

[compnerd]

CC: @abertelrud

[compnerd]

Build: adjust the BuildSystemDelegate hander by compnerd · Pull Request #4192 · apple/swift-package-manager (github.com)

That change is the key for supporting the pretty printing support in SPM on Windows. With that, I am able to get nice diagnostics from the C/C++ and Swift compilers and retain the pretty printing.

[compnerd]

TSCBasic: enable proper rendering on Windows by compnerd · Pull Request #294 · apple/swift-tools-support-core (github.com)

Restores the normal behaviour in TSC for the progress reporting on Windows. This seems to be working well locally.