enable golangci-lint for supported platforms

.github/workflows/validate.yml

@@ -19,6 +19,8 @@ on:
 jobs:
   validate:
     runs-on: ubuntu-22.04
+    env:
+      GOLANGCI_LINT_MULTIPLATFORM: 1
     strategy:
       fail-fast: false
       matrix:

.golangci.yml

@@ -1,5 +1,5 @@
 run:
-  timeout: 10m
+  timeout: 30m
   skip-files:
     - ".*\\.pb\\.go$"
 

docker-bake.hcl

@@ -7,6 +7,9 @@ variable "DOCS_FORMATS" {
 variable "DESTDIR" {
   default = "./bin"
 }
+variable "GOLANGCI_LINT_MULTIPLATFORM" {
+  default = null
+}
 
 # Special target: https://github.com/docker/metadata-action#bake-definition
 target "meta-helper" {
@@ -32,6 +35,17 @@ target "lint" {
   inherits = ["_common"]
   dockerfile = "./hack/dockerfiles/lint.Dockerfile"
   output = ["type=cacheonly"]
+  platforms = GOLANGCI_LINT_MULTIPLATFORM != null ? [
+    "darwin/amd64",
+    "darwin/arm64",
+    "linux/amd64",
+    "linux/arm64",
+    "linux/s390x",
+    "linux/ppc64le",
+    "linux/riscv64",
+    "windows/amd64",
+    "windows/arm64"
+  ] : []
 }
 
 target "validate-vendor" {

hack/dockerfiles/lint.Dockerfile

@@ -1,14 +1,19 @@
 # syntax=docker/dockerfile:1
 
 ARG GO_VERSION=1.21.3
+ARG XX_VERSION=1.3.0
 ARG GOLANGCI_LINT_VERSION=1.54.2
 
-FROM golang:${GO_VERSION}-alpine
+FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine
 RUN apk add --no-cache git gcc musl-dev
 ENV GOFLAGS="-buildvcs=false"
 ARG GOLANGCI_LINT_VERSION
 RUN wget -O- -nv https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s v${GOLANGCI_LINT_VERSION}
+COPY --link --from=xx / /
 WORKDIR /go/src/github.com/docker/buildx
+ARG TARGETPLATFORM
 RUN --mount=target=/go/src/github.com/docker/buildx \
-    --mount=target=/root/.cache,type=cache \
+    --mount=target=/root/.cache,type=cache,id=lint-cache-$TARGETPLATFORM \
+    xx-go --wrap && \
     golangci-lint run