Tekton 0.3.1 does not support $() syntax

Tekton 0.3.1 is used for release. It does not support the $() syntax
so ${} should be used everywhere.

tekton/publish-nightly.yaml

@@ -78,12 +78,12 @@ spec:
       # By default ko will build images on top of distroless
       baseImageOverrides:
         # Use the images we just built as base images
-        $(inputs.params.pathToProject)/$(outputs.resources.builtCredsInitImage.url): ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
-        $(inputs.params.pathToProject)/$(outputs.resources.builtGitInitImage.url): ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
+        ${inputs.params.pathToProject}/${outputs.resources.builtCredsInitImage.url}: ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
+        ${inputs.params.pathToProject}/${outputs.resources.builtGitInitImage.url}: ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
 
-        $(inputs.params.pathToProject)/$(outputs.resources.builtBashImage.url): busybox # image should have shell in $PATH
-        $(inputs.params.pathToProject)/$(outputs.resources.builtEntrypointImage.url): busybox # image should have shell in $PATH
-        $(inputs.params.pathToProject)/$(outputs.resources.builtGsutilImage.url): google/cloud-sdk:alpine # image should have gsutil in $PATH
+        ${inputs.params.pathToProject}/${outputs.resources.builtBashImage.url}: busybox # image should have shell in $PATH
+        ${inputs.params.pathToProject}/${outputs.resources.builtEntrypointImage.url}: busybox # image should have shell in $PATH
+        ${inputs.params.pathToProject}/${outputs.resources.builtGsutilImage.url}: google/cloud-sdk:alpine # image should have gsutil in $PATH
       EOF
 
       cat /workspace/go/src/github.com/tektoncd/pipeline/.ko.yaml
@@ -151,7 +151,7 @@ spec:
     - |
       set -e
       set -x
-    
+
       # Can't use workingDir due to #1267
       cd /workspace/go/src/github.com/tektoncd/pipeline
 

tekton/publish.yaml

@@ -78,11 +78,11 @@ spec:
       cat <<EOF > /workspace/go/src/github.com/tektoncd/pipeline/.ko.yaml
       # By default ko will build images on top of distroless
       baseImageOverrides:
-        $(inputs.params.pathToProject)/$(outputs.resources.builtCredsInitImage.url): ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
-        $(inputs.params.pathToProject)/$(outputs.resources.builtGitInitImage.url): ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
-        $(inputs.params.pathToProject)/$(outputs.resources.builtBashImage.url): busybox # image should have shell in $PATH
-        $(inputs.params.pathToProject)/$(outputs.resources.builtEntrypointImage.url): busybox # image should have shell in $PATH
-        $(inputs.params.pathToProject)/$(outputs.resources.builtGsutilImage.url): google/cloud-sdk:alpine # image should have gsutil in $PATH
+        ${inputs.params.pathToProject}/${outputs.resources.builtCredsInitImage.url}: ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
+        ${inputs.params.pathToProject}/${outputs.resources.builtGitInitImage.url}: ${inputs.params.imageRegistry}/${inputs.params.pathToProject}/build-base:latest
+        ${inputs.params.pathToProject}/${outputs.resources.builtBashImage.url}: busybox # image should have shell in $PATH
+        ${inputs.params.pathToProject}/${outputs.resources.builtEntrypointImage.url}: busybox # image should have shell in $PATH
+        ${inputs.params.pathToProject}/${outputs.resources.builtGsutilImage.url}: google/cloud-sdk:alpine # image should have gsutil in $PATH
       EOF
 
       cat /workspace/go/src/github.com/tektoncd/pipeline/.ko.yaml
@@ -147,8 +147,8 @@ spec:
       set -e
       set -x
 
-      mkdir -p /workspace/output/bucket/previous/$(inputs.params.versionTag)/
-      cp /workspace/output/bucket/latest/release.yaml /workspace/output/bucket/previous/$(inputs.params.versionTag)/release.yaml
+      mkdir -p /workspace/output/bucket/previous/${inputs.params.versionTag}/
+      cp /workspace/output/bucket/latest/release.yaml /workspace/output/bucket/previous/${inputs.params.versionTag}/release.yaml
 
   - name: tag-images
     image: google/cloud-sdk