hack: add gopls based linters

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

.github/workflows/validate.yml

@@ -24,6 +24,7 @@ jobs:
       matrix:
         target:
           - lint
+          - lint-gopls
           - validate-vendor
           - validate-docs
           - validate-generated-files

Makefile

@@ -43,6 +43,10 @@ validate-all: lint test validate-vendor validate-docs validate-generated-files
 lint:
 	$(BUILDX_CMD) bake lint
 
+.PHONY: lint-gopls
+lint-gopls:
+	$(BUILDX_CMD) bake lint-gopls
+
 .PHONY: test
 test:
 	./hack/test

docker-bake.hcl

@@ -28,7 +28,7 @@ group "default" {
 }
 
 group "validate" {
-  targets = ["lint", "validate-vendor", "validate-docs"]
+  targets = ["lint", "lint-gopls", "validate-vendor", "validate-docs"]
 }
 
 target "lint" {
@@ -48,6 +48,11 @@ target "lint" {
   ] : []
 }
 
+target "lint-gopls" {
+  inherits = ["lint"]
+  target = "gopls-analyze"
+}
+
 target "validate-vendor" {
   inherits = ["_common"]
   dockerfile = "./hack/dockerfiles/vendor.Dockerfile"

hack/dockerfiles/lint.Dockerfile

@@ -3,11 +3,17 @@
 ARG GO_VERSION=1.21
 ARG XX_VERSION=1.3.0
 ARG GOLANGCI_LINT_VERSION=1.57.2
+ARG GOPLS_VERSION=v0.20.0
+# disabled: deprecated unusedvariable simplifyrange
+ARG GOPLS_ANALYZERS="embeddirective fillreturns infertypeargs nonewvars noresultvalues simplifycompositelit simplifyslice stubmethods undeclaredname unusedparams useany"
+
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
 
-FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine AS golang-base
 RUN apk add --no-cache git gcc musl-dev
+
+FROM golang-base AS lint
 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${GOLANGCI_LINT_VERSION}
@@ -18,3 +24,49 @@ RUN --mount=target=/go/src/github.com/docker/buildx \
     --mount=target=/root/.cache,type=cache,id=lint-cache-$TARGETPLATFORM \
     xx-go --wrap && \
     golangci-lint run
+
+FROM golang-base AS gopls
+RUN apk add --no-cache git
+ARG GOPLS_VERSION
+WORKDIR /src
+RUN git clone https://github.com/golang/tools.git && \
+  cd tools && git checkout ${GOPLS_VERSION}
+WORKDIR tools/gopls
+ARG GOPLS_ANALYZERS
+RUN <<'EOF'
+  set -ex
+  mkdir -p /out
+  for analyzer in ${GOPLS_ANALYZERS}; do
+    mkdir -p internal/cmd/$analyzer
+    cat <<eot > internal/cmd/$analyzer/main.go
+package main
+
+import (
+	"golang.org/x/tools/go/analysis/singlechecker"
+	analyzer "golang.org/x/tools/gopls/internal/analysis/$analyzer"
+)
+
+func main() { singlechecker.Main(analyzer.Analyzer) }
+eot
+    echo "Analyzing with ${analyzer}..."
+    go build -o /out/$analyzer ./internal/cmd/$analyzer
+  done
+EOF
+
+FROM golang-base AS gopls-analyze
+COPY --link --from=xx / /
+ARG GOPLS_ANALYZERS
+ARG TARGETNAME
+ARG TARGETPLATFORM
+WORKDIR /go/src/github.com/docker/buildx
+RUN --mount=target=. \
+  --mount=target=/root/.cache,type=cache,id=lint-cache-${TARGETNAME}-${TARGETPLATFORM} \
+  --mount=target=/gopls-analyzers,from=gopls,source=/out <<EOF
+  set -ex
+  xx-go --wrap
+  for analyzer in ${GOPLS_ANALYZERS}; do
+    go vet -vettool=/gopls-analyzers/$analyzer ./...
+  done
+EOF
+
+FROM lint