initial commit

docker-bake.hcl

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+# Docker Bake definition.
+#
+# One place that knows how to build every target variant, so that `docker buildx
+# bake`, the GitHub Actions workflow and a developer's terminal all produce the same
+# image from the same inputs.
+#
+#   docker buildx bake                 # build the default tag
+#   docker buildx bake --push          # build and push
+#   docker buildx bake --print         # show what would run
+#   docker buildx bake --set *.platform=linux/arm64
+
+variable "VERSION" {
+  default = "dev"
+}
+
+variable "COMMIT" {
+  default = "unknown"
+}
+
+variable "BUILD_DATE" {
+  default = "unknown"
+}
+
+variable "REGISTRY" {
+  default = "ghcr.io/urpi"
+}
+
+variable "IMAGE" {
+  default = "${REGISTRY}/go-bananas"
+}
+
+variable "TAGS" {
+  default = "${IMAGE}:${VERSION}"
+}
+
+# `platforms` is a list rather than a single value so that one invocation produces
+# a manifest list covering both architectures.
+group "default" {
+  targets = ["image"]
+}
+
+target "_common" {
+  context    = "."
+  dockerfile = "Dockerfile"
+  args = {
+    VERSION    = VERSION
+    COMMIT     = COMMIT
+    BUILD_DATE = BUILD_DATE
+  }
+  labels = {
+    "org.opencontainers.image.title"       = "go-bananas"
+    "org.opencontainers.image.description" = "Runtime design-token service"
+    "org.opencontainers.image.version"     = VERSION
+    "org.opencontainers.image.revision"    = COMMIT
+    "org.opencontainers.image.created"     = BUILD_DATE
+    "org.opencontainers.image.source"      = "https://github.com/urpi/go-bananas"
+  }
+}
+
+target "image" {
+  inherits = ["_common"]
+  tags     = ["${IMAGE}:${VERSION}", "${IMAGE}:latest"]
+  platforms = ["linux/amd64", "linux/arm64"]
+  output   = ["type=image"]
+}
+
+target "image-push" {
+  inherits = ["_common"]
+  tags     = split("\n", TAGS)
+  platforms = ["linux/amd64", "linux/arm64"]
+  output   = ["type=image,push=true"]
+}
+
+# A local single-architecture image for `docker compose up` and for a quick look
+# on a laptop, where a manifest list only adds a layer of indirection.
+target "dev" {
+  inherits = ["_common"]
+  tags     = ["go-bananas:dev"]
+  platforms = ["linux/amd64"]
+  output   = ["type=docker"]
+  cache-to = ["type=gha,mode=max"]
+}
+
+# The cache-only target, for warming a CI runner before the real build.
+target "cache" {
+  inherits = ["_common"]
+  platforms = ["linux/amd64"]
+  cache-to = ["type=gha,mode=max"]
+  cache-from = ["type=gha"]
+}