fix(build): sync LWD builder with our build-docker-image.yml workfl…

…ow (#6634)

After migrating to our new GCP project, some references were not being applied correctly, as this workflow was not referencing new resources the right way. It was even outdated on some specific parts.

.github/workflows/zcash-lightwalletd.yml

@@ -1,3 +1,5 @@
+# TODO: we should stop using this build approach with lightwalletd and move to using our
+# reusable workflow to building all the docker images of our repo 
 name: zcash-lightwalletd
 
 # Ensures that only one workflow task will run at a time. Previous builds, if
@@ -77,18 +79,21 @@ jobs:
         with:
           # list of Docker images to use as base name for tags
           images: |
-            ${{ vars.GAR_BASE }}/${{ env.IMAGE_NAME }}
+            us-docker.pkg.dev/${{ vars.GCP_PROJECT }}/zebra/${{ env.IMAGE_NAME }}
           # generate Docker tags based on the following events/attributes
           # set latest tag for default branch
           tags: |
             type=schedule
-            type=ref,event=branch
-            type=ref,event=pr
+            # semver and ref,tag automatically add a "latest" tag, but only on stable releases
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
+            type=ref,event=tag
+            type=ref,event=branch
+            type=ref,event=pr
             type=sha
-            type=raw,value=latest,enable={{is_default_branch}}
+            # edge is the latest commit on the default branch.
+            type=edge,enable={{is_default_branch}}
 
       - name: Set up QEMU
         id: qemu
@@ -142,5 +147,8 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           push: true
-          cache-from: type=registry,ref=${{ vars.GAR_BASE }}/${{ env.IMAGE_NAME }}:buildcache
-          cache-to: type=registry,ref=${{ vars.GAR_BASE }}/${{ env.IMAGE_NAME }}:buildcache,mode=max
+          cache-from: |
+            type=registry,ref=us-docker.pkg.dev/${{ vars.GCP_PROJECT }}/zebra-caching/${{ env.IMAGE_NAME }}:${{ env.GITHUB_REF_SLUG_URL }}-cache
+            type=registry,ref=us-docker.pkg.dev/${{ vars.GCP_PROJECT }}/zebra-caching/${{ env.IMAGE_NAME }}:main-cache
+          cache-to: |
+            type=registry,ref=us-docker.pkg.dev/${{ vars.GCP_PROJECT }}/zebra-caching/${{ env.IMAGE_NAME }}:${{ env.GITHUB_REF_SLUG_URL }}-cache,mode=max