builtkit: use workspace instead of GitResource 🐐

This migrate buildkit to use `workspace` instead of an input
`GitResource`.

Signed-off-by: Vincent Demeester <vdemeest@redhat.com>

buildkit/README.md

@@ -61,12 +61,12 @@ task.tekton.dev/buildkit created
 * **BUILDKIT_CLIENT_CERTS**: The name of Secret that contains `ca.pem`, `cert.pem`, `key.pem`
   for mTLS connection to BuildKit daemon (_default:_`buildkit-client-certs`)
 
-## Resources
-
-### Inputs
+## Workspaces
 
 * **source**: A `git`-type `PipelineResource` specifying the location of the source to build.
 
+## Resources
+
 ### Outputs
 
 * **image**: An `image`-type `PipelineResource` specifying the image that should be built.

buildkit/task.yaml

@@ -18,10 +18,9 @@ spec:
   - name: BUILDKIT_CLIENT_CERTS
     description: The name of Secret that contains ca.pem, cert.pem, key.pem for mTLS connection to BuildKit daemon
     default: "buildkit-client-certs"
+  workspaces:
+  - name: source
   resources:
-    inputs:
-    - name: source
-      type: git
     outputs:
     - name: image
       type: image
@@ -32,7 +31,7 @@ spec:
   steps:
   - name: build-and-push
     image: $(params.BUILDKIT_CLIENT_IMAGE)
-    workingDir: /workspace/source
+    workingDir: $(workspaces.source.path)
     volumeMounts:
     - name: certs
       readOnly: true