Add --version flag to host agent binary

[dharmjit]

It will be useful to provide a --version flag in the host-agent binary as we will have multiple agent releases so that the user can know the version being used. The output could consist of information in the below format

$ byoh-hostagent-linux-amd64 --version
Version: v0.1.0_alpha.2
BuildDate: 
...

[raunaksingwi]

I can take this one

[anusha94]

/assign @raunaksingwi

[raunaksingwi]

Are we manually going to update the version (in the Makefile) or do we have to derive the version from some other variables like GOOS, GOARCH, etc?

[anusha94]

The build job will be triggered when we push a tag to the repo. See this job -

cluster-api-provider-bringyourownhost/.github/workflows/draft-release.yaml

Line 23 in 2a1aaaa

run: IMG="projects.registry.vmware.com/cluster_api_provider_bringyourownhost/cluster-api-byoh-controller:${{ github.ref_name }}" make build-release-artifacts

You can use the ${{ github.ref_name }} - this is going to be the agent binary version.
Does that answer?