src/cmdlib.sh: Work-around for OpenShift 3.9 not including .git [#320]

[darkmuggle]

This address #320 by allowing for Opendshift s2i builds to work in 3.9. Example:

      strategy:                                                                                                                        
        dockerStrategy:                                                                                                                
          env:                                                                                                                         
              - name: GIT_URL                                                                                                          
                value: https://github.com/coreos/coreos-assembler                                                                                          
              - name: GIT_REF                                                                                                          
                value: master
              - name: OPENSHIFT_GIT_HACK                                                                                               
                value: "TRUE"                                                                                                          
          from:                                                                                                                        
            kind: ImageStreamTag                                                                                                       
            name: fedora:29                                                                                                            

[dustymabe]

that issue is closed so maybe we need more guidance on when we can remove this (i.e. when based on Openshift XX with S2I YY)

[darkmuggle]

The change logs are not really helpful on either Openshift or S2I. Still hunting...

[darkmuggle]

It looks like version v1.0.6 of the Source-to-Image has the change However, I can't find which version of Openshift has that in the default ose-docker-builder container.

[dustymabe]

guess we could pull the container and find out

[darkmuggle]

One would think so:

ben@porpentina:~ $ sudo podman run --rm -it openshift3/ose-docker-builder:v3.10.45-5 version
openshift-docker-build v3.10.45

That's not the case.

[cgwalters]

LGTM!