make multi-arch (amd64+arm64) docker images available

.goreleaser.yml

@@ -108,11 +108,47 @@ archives:
       - goos: windows
         format: zip
 
-# TODO(joem): multi-arch docker image: https://goreleaser.com/cookbooks/multi-platform-docker-images/
 dockers:
   - dockerfile: Dockerfile
+    use: buildx
+    build_flag_templates:
+      - "--pull"
+      - "--platform=linux/amd64"
     image_templates:
-      - "ghcr.io/autotag-dev/autotag:{{ .Tag }}" # v1.0.0
-      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}" # v1
-      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}.{{ .Minor }}" # v1.0
-      - "ghcr.io/autotag-dev/autotag:latest"
+      - "ghcr.io/autotag-dev/autotag:{{ .Tag }}-amd64" # v1.0.0-amd64
+      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}-amd64" # v1-amd64
+      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}.{{ .Minor }}-amd64" # v1.0-amd64
+      - "ghcr.io/autotag-dev/autotag:latest-amd64"
+
+  - dockerfile: Dockerfile
+    use: buildx
+    build_flag_templates:
+      - "--pull"
+      - "--platform=linux/arm64"
+    image_templates:
+      - "ghcr.io/autotag-dev/autotag:{{ .Tag }}-arm64" # v1.0.0-arm64
+      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}-arm64" # v1-arm64
+      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}.{{ .Minor }}-arm64" # v1.0-arm64
+      - "ghcr.io/autotag-dev/autotag:latest-arm64"
+
+# use `docker_manifests` section to create combined multi-arch image manifests:
+docker_manifests:
+  - name_template: "ghcr.io/autotag-dev/autotag:{{ .Tag }}"
+    image_templates:
+      - "ghcr.io/autotag-dev/autotag:{{ .Tag }}-amd64"
+      - "ghcr.io/autotag-dev/autotag:{{ .Tag }}-arm64"
+
+  - name_template: "ghcr.io/autotag-dev/autotag:{{ .Major }}"
+    image_templates:
+      - "ghcr.io/autotag-dev/autotag:{{ .Major }}-amd64"
+      - "ghcr.io/autotag-dev/autotag:{{ .Major }}-arm64"
+
+  - name_template: "ghcr.io/autotag-dev/autotag:{{ .Major }}.{{ .Minor }}"
+    image_templates:
+      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}.{{ .Minor }}-amd64"
+      - "ghcr.io/autotag-dev/autotag:v{{ .Major }}.{{ .Minor }}-arm64"
+
+  - name_template: "ghcr.io/autotag-dev/autotag:latest"
+    image_templates:
+      - "ghcr.io/autotag-dev/autotag:latest-amd64"
+      - "ghcr.io/autotag-dev/autotag:latest-arm64"

Makefile

@@ -19,4 +19,4 @@ cov:
 	go tool cover -func cover.out
 
 snapshot:
-	@goreleaser --rm-dist --snapshot --debug
+	@goreleaser release --clean --snapshot --verbose

README.md

@@ -22,15 +22,19 @@ Installing
 ### Pre-built binaries
 
 | OS    | Arch  | binary              |
-| ----- | ----- | ------------------- |
+|-------|-------|---------------------|
 | macOS | amd64 | [autotag][releases] |
 | Linux | amd64 | [autotag][releases] |
 
 ### Docker images
 
-| Arch  | Images                                                           |
-| ----- | ---------------------------------------------------------------- |
-| amd64 | `ghcr.io/autotag-dev/autotag:latest`, `vX.Y.Z`, `vX.Y`, `vX` |
+> multi-arch images are available beginning with v1.3.34
+
+| Arch       | Images                                                                               |
+|------------|--------------------------------------------------------------------------------------|
+| multi-arch | `ghcr.io/autotag-dev/autotag:latest`, `vX.Y.Z`, `vX.Y`, `vX`                         |
+| amd64      | `ghcr.io/autotag-dev/autotag:latest-amd64`, `vX.Y.Z-amd64`, `vX.Y-amd64`, `vX-amd64` |
+| arm64      | `ghcr.io/autotag-dev/autotag:latest-arm64`, `vX.Y.Z-arm64`, `vX.Y-arm64`, `vX-arm64` |
 
 [releases]: https://github.com/autotag-dev/autotag/releases/latest