Switch from gha cache to registry cache

A CI run (four images cached with mode-max) populates the cache with 295
cache entries totalling 23.44 GB. This exceeds gha's 10GB limit, causing
trashing. Try with a registry instead.

.github/actions/setup/action.yml

@@ -4,8 +4,10 @@ inputs:
   GITHUB_TOKEN:
     required: true
 outputs:
-  lowercase-repo:
+  image-name:
-    value: ${{ steps.lowercaseRepo.outputs.lowercase }}
+    value: ghcr.io/${{ steps.lowercaseRepo.outputs.lowercase }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}
+  cache-name:
+    value: ghcr.io/${{ steps.lowercaseRepo.outputs.lowercase }}:cache
 runs:
   using: "composite"
   steps:

.github/workflows/ci.yml

@@ -34,10 +34,9 @@ jobs:
           push: true
           platforms: linux/amd64
           target: frigate
-          tags: |
+          tags: ${{ steps.setup.outputs.image-name }}-amd64
-            ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}-amd64
+          cache-from: type=registry,ref=${{ steps.setup.outputs.cache-name }}-amd64
-          cache-from: type=gha
+          cache-to: type=registry,ref=${{ steps.setup.outputs.cache-name }}-amd64,mode=max,compression=zstd
-          cache-to: type=gha,mode=max,compression=zstd
       - name: Build and push TensorRT (x86 GPU)
         uses: docker/bake-action@v3
         with:
@@ -45,8 +44,7 @@ jobs:
           targets: tensorrt
           files: docker/tensorrt/trt.hcl
           set: |
-            tensorrt.tags=ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}-tensorrt
+            tensorrt.tags=${{ steps.setup.outputs.image-name }}-tensorrt
-            *.cache-from=type=gha
   arm64_build:
     runs-on: ubuntu-latest
     name: ARM Build
@@ -67,9 +65,9 @@ jobs:
           platforms: linux/arm64
           target: frigate
           tags: |
-            ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}-standard-arm64
+            ${{ steps.setup.outputs.image-name }}-standard-arm64
-          cache-from: type=gha
+          cache-from: type=registry,ref=${{ steps.setup.outputs.cache-name }}-standard-arm64
-          cache-to: type=gha,mode=max,compression=zstd
+          cache-to: type=registry,ref=${{ steps.setup.outputs.cache-name }}-standard-arm64,mode=max,compression=zstd
       - name: Build and push RPi build
         uses: docker/bake-action@v3
         with:
@@ -77,8 +75,7 @@ jobs:
           targets: rpi
           files: docker/rpi/rpi.hcl
           set: |
-            rpi.tags=ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}-rpi
+            rpi.tags=${{ steps.setup.outputs.image-name }}-rpi
-            *.cache-from=type=gha
   jetson_jp4_build:
     runs-on: ubuntu-latest
     name: Jetson Jetpack 4
@@ -102,9 +99,9 @@ jobs:
           targets: tensorrt
           files: docker/tensorrt/trt.hcl
           set: |
-            tensorrt.tags=ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}-tensorrt-jp4
+            tensorrt.tags=${{ steps.setup.outputs.image-name }}-tensorrt-jp4
-            *.cache-from=type=gha
+            *.cache-from=type=registry,ref=${{ steps.setup.outputs.cache-name }}-tensorrt-jp4
-            *.cache-to=type=gha,mode=max,compression=zstd
+            *.cache-to=type=registry,ref=${{ steps.setup.outputs.cache-name }}-tensorrt-jp4,mode=max,compression=zstd
   jetson_jp5_build:
     runs-on: ubuntu-latest
     name: Jetson Jetpack 5
@@ -128,9 +125,9 @@ jobs:
           targets: tensorrt
           files: docker/tensorrt/trt.hcl
           set: |
-            tensorrt.tags=ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}-tensorrt-jp5
+            tensorrt.tags=${{ steps.setup.outputs.image-name }}-tensorrt-jp5
-            *.cache-from=type=gha
+            *.cache-from=type=registry,ref=${{ steps.setup.outputs.cache-name }}-tensorrt-jp5
-            *.cache-to=type=gha,mode=max,compression=zstd
+            *.cache-to=type=registry,ref=${{ steps.setup.outputs.cache-name }}-tensorrt-jp5,mode=max,compression=zstd
   # The majority of users running arm64 are rpi users, so the rpi
   # build should be the primary arm64 image
   assemble_default_build:
@@ -154,7 +151,7 @@ jobs:
         run: echo "SHORT_SHA=${GITHUB_SHA::7}" >> $GITHUB_ENV
       - uses: int128/docker-manifest-create-action@v1
         with:
-          tags: ghcr.io/${{ steps.setup.outputs.lowercase-repo }}:${{ github.ref_name }}-${{ env.SHORT_SHA }}
+          tags: ${{ steps.setup.outputs.image-name }}
           suffixes: |
             -amd64
             -rpi