Support built in golang version manager.

[BrownNPC]

Tinygo is very picky about the name of the go compiler executable.
It requires the command to run the go compiler to be go but sometimes that can cause issues if the version is not supported by tinygo.

Go already has a built-in way to manage different versions of the compiler.
https://go.dev/doc/manage-install#installing-multiple

But the compilers installed using this method have a different binary name. Example: go1.21.3

I propose that tiny go should be able to detect Golang versions installed using this method automatically.

[mattjohnsonpint]

This would be helpful at the moment, since TinyGo latest 0.35.0 doesn't support Go latest 1.24. I can't seem to find any way to tell TinyGo to use the previous Go 1.23.6 version that I've installed via the method in the docs linked above. Setting GOROOT doesn't help. Adding the previous version's bin folder to the path doesn't help. The only way seems to be to uninstall Go 1.24 and reinstall Go 1.23.6.

[inliquid]

@mattjohnsonpint if I get you right you may try to set GOTOOLCHAIN env variable:

$ go version
go version go1.23.4 linux/amd64
$ GOTOOLCHAIN=go1.23.6 tinygo version
tinygo version 0.34.0 linux/amd64 (using go version go1.23.6 and LLVM version 18.1.2)
$ GOTOOLCHAIN=go1.23.5 tinygo version
tinygo version 0.34.0 linux/amd64 (using go version go1.23.5 and LLVM version 18.1.2)

[mattjohnsonpint]

@inliquid - that works! Thanks!

[BrownNPC]

@deadprogram could this be documented?