Add version subcomand to wsl-helper

[bcxpro]

Added a version subcommand in a similar way to rdctl version. This task is mostly trivial, however I am not sure which version number to use and where it is more appropiate to store the version constant.

Closes #5808

[jandubois]

I am not sure which version number to use and where it is more appropiate to store the version constant.

I think the version should be the Rancher Desktop version, and not some independent utility version. We already do the latter for rdctl and never bump it, so it is completely useless.

In a Makefile we would determine the version something like this:

VERSION := $(shell git describe --match 'v[0-9]*' --dirty='.m' --always --tags)
VERSION_TRIMMED := $(VERSION:v%=%)

GO_BUILD_LDFLAGS := -ldflags="-s -w -X $(PACKAGE)/pkg/version.Version=$(VERSION)"

For the bundled utilities this should be done inside scripts/dependencies/go-source.ts.

[bcxpro]

@jandubois I just pushed new code updating rdctl and wsl-helper with the version stamped as you suggeested. I created a version package in each module with the Version variable. Them updated go-source.ts to stamp the version to the binary.

I did not touch the utilities that are build with makefiles yet.

Please tell me if this is in line with what you expected.

[jandubois]

Thanks, LGTM

On Windows:

C:\Users\SUSE>"\Program Files\Rancher Desktop\resources\resources\win32\internal\wsl-helper" version
wsl-helper version: v1.18.0-57-g65a7241f2

C:\Users\SUSE>rdctl version
rdctl client version: v1.18.0-57-g65a7241f2, targeting server version: v1

On macOS:

❯ rdctl version
rdctl client version: v1.18.0-57-g65a7241f2, targeting server version: v1

[mook-as]

Both of the new parameters are optional, so for things like nerdctl-stub we get -X undefined/pkg/version.Version=undefined, but I guess that ends up being okay? There is no package by such name, but the go compiler doesn't complain (at least CI passes everything).

[jandubois]

That's a good point! @bcxpro can you please change the code so that -X is only passed when the parameters are set? I prefer that the code is "correct" and not just works by accident because the Go compiler does not care.