This a custom build config (defined in yaml) that can be used in OpenShift to create a S2I docker image. For use with `oc create`

swift-30-centos7-bc.yaml

kind: "BuildConfig"
apiVersion: "v1"
metadata:
  name: "swift-30-centos7-build"
spec:
  triggers:
    - type: "GitHub"
      github:
        secret: "secret101"
  source:
    type: "Git"
    git:
      uri: "git://github.com/dudash/s2i-swift.git"
  strategy:
    type: "Custom"
    customStrategy:
      from:
        kind: "DockerImage"
        name: "openshift/sti-image-builder"
      env:
        - name: "IMAGE_NAME"
          value: "openshift/swift-30-centos7"
        - name: "CONTEXT_DIR"
          value: "/3.0/"
      exposeDockerSocket: true
  output:
    to:
      kind: "ImageStreamTag"
      name: "swift:latest"

Hmm... openshift/sti-image-builder isn't there.... there are however these:
mfojtik/sti-image-builder
openshift/origin-custom-docker-builder

These seem to be "Source" strategy type images
openshift/origin-sti-builder
registry.access.redhat.com/openshift3/ose-sti-builder