Looks like this is blocked by msys2/setup-msys2#358

@rustbot blocked

The msys2 setup step was discussed recently and it was concluded that it could possibly be skipped if you can manually get the mingw make earlier in PATH than the default make. Though you'd also need to make sure not to override other tools.

run-make tests specifically need the one that uses mingw style paths.

Looks like this is blocked by msys2/setup-msys2#358

I've worked around this by downgrading the setup-msys2 task to v2.21.0

The bigger issue that I'm hitting now: this is a clean install of Windows, so no VS, Git, GitHub Runner Agent, etc.

The bigger issue that I'm hitting now: this is a clean install of Windows, so no VS, Git, GitHub Runner Agent, etc.

Does that somehow differ on ARM vs the old x86 Windows runners?

The bigger issue that I'm hitting now: this is a clean install of Windows, so no VS, Git, GitHub Runner Agent, etc.

Does that somehow differ on ARM vs the old x86 Windows runners?

Yes: the x86 runners use a pre-built image provided by GitHub, but GitHub/Microsoft are yet to provide such an image for ARM64 Windows. GitHub's blog post says "with plans to add developer tools to the Windows image" but doesn't provide any timeline for when that'll be available.

I'm going to continue to experiment with installing dependencies during the build, but it may take me a while to get everything working.

I'm going to pause this work until there's a Windows ARM64 image with tools preinstalled.