Fix file paths for exec launcher on Windows

[vinistock]

Motivation

I noticed that we were getting failures for launcher mode on Windows. After some research, it seems that the issue is with the long file path format (prefixed by //?/), which is a valid way of representing paths, but not suitable for command line execution.

When we invoke exec with a path prefixed like that, it fails with an invalid argument error coming from the system.

Implementation

I tried several things to normalize the file paths, but it doesn't seem like Ruby has anything available. None of these options worked: Shellwords.escape, File.expand_path, File.realpath.

So I went with just deleting the prefix manually, which makes the new launch test pass.

Automated Tests

I added a new launch integration test, which would've surfaced this issue before to us. Additionally, I made some adjustments to existing tests.

[vinistock]

• Add debugger test with project Bundler settings #3093
• Use bundled environment activation script file #3083
• Fix file paths for exec launcher on Windows #3073 👈 (View in Graphite)
• main

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