feat: rewrite timestamps for cache hits

README.md

@@ -86,7 +86,7 @@ The `devcontainer-cache-build-initialize` script reads several environment varia
 | `DEVCONTAINER_IMAGE` | ✓ | N/A | The tag applied to the image build |
 | `DEVCONTAINER_BUILD_ADDITIONAL_ARGS` | ✗ | N/A | Arbitrary additional args forwarded to the `build` or `bake` command |
 | `DEVCONTAINER_CACHE_FROMS` | ✗ | `type=registry,ref=[DEVCONTAINER_REGISTRY]-cache:[current git branch name sanitized] type=registry,ref=[DEVCONTAINER_REGISTRY]-cache:local-[current git branch name sanitized] type=registry,ref=[DEVCONTAINER_REGISTRY]-cache:[DEVCONTAINER_DEFAULT_BRANCH_NAME, sanitized]` | Each [`cache-from` arg](https://docs.docker.com/reference/cli/docker/buildx/build/#cache-from) to be applied to the image build, space separated |
-| `DEVCONTAINER_CACHE_TOS` | ✗ | `type=registry,ref=[DEVCONTAINER_REGISTRY]-cache:[local-][current git branch name sanitized]` | Each [`cache-to` arg](https://docs.docker.com/reference/cli/docker/buildx/build/#cache-to) to be applied to the image build, space separated. The default value includes `local-` applied as a version prefix unless `CI=true` |
+| `DEVCONTAINER_CACHE_TOS` | ✗ | `type=registry,rewrite-timestamp=true,ref=[DEVCONTAINER_REGISTRY]-cache:[local-][current git branch name sanitized]` | Each [`cache-to` arg](https://docs.docker.com/reference/cli/docker/buildx/build/#cache-to) to be applied to the image build, space separated. The default value includes `local-` applied as a version prefix unless `CI=true` |
 | `DEVCONTAINER_CONTEXT` | ✗ | `.` | The build context for the image |
 | `DEVCONTAINER_DEFAULT_BRANCH_NAME` | ✗ | `main` | The branch name from which to always pull cache |
 | `DEVCONTAINER_DEFINITION_TYPE` | ✗ | `build` | The image definition type, [basic Docker build (`build`)](https://docs.docker.com/reference/cli/docker/buildx/build/) or [Bake (`bake`)](https://docs.docker.com/reference/cli/docker/buildx/bake/) |

devcontainer-cache-build-initialize

@@ -74,11 +74,11 @@ DEVCONTAINER_CACHE_FROMS="${DEVCONTAINER_CACHE_FROMS:=${DEFAULT_DEVCONTAINER_CAC
 
 if [[ "${CI}" != "true" ]]; then
   DEFAULT_DEVCONTAINER_CACHE_TOS=" \
-    type=registry,ref=${DEVCONTAINER_IMAGE_REF}-cache:local-${GIT_BRANCH_SANITIZED} \
+    type=registry,rewrite-timestamp=true,ref=${DEVCONTAINER_IMAGE_REF}-cache:local-${GIT_BRANCH_SANITIZED} \
   "
 else
   DEFAULT_DEVCONTAINER_CACHE_TOS=" \
-    type=registry,ref=${DEVCONTAINER_IMAGE_REF}-cache:${GIT_BRANCH_SANITIZED} \
+    type=registry,rewrite-timestamp=true,ref=${DEVCONTAINER_IMAGE_REF}-cache:${GIT_BRANCH_SANITIZED} \
   "
 fi
 DEVCONTAINER_CACHE_TOS="${DEVCONTAINER_CACHE_TOS:=${DEFAULT_DEVCONTAINER_CACHE_TOS}}"