Added GithubActions and updated linter

.github/workflows/build-lint-test.yaml

@@ -0,0 +1,86 @@
+name: Build, Lint, and Test
+
+on:
+  push:
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-file: go.mod
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Build
+        run: |
+          CGO_ENABLED=0 GOARCH=amd64 go build -v ./cmd/adapter
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-file: go.mod
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v8
+        with:
+          version: v2.8.0
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-file: go.mod
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Run tests
+        run: go test -v ./cmd/... ./pkg/...

.golangci.yml

@@ -1,39 +1,43 @@
+version: "2"
+
 run:
-  deadline: 5m
+  timeout: 5m
 
 linters:
-  disable-all: true
+  default: none
   enable:
     - bodyclose
     - dogsled
     - dupl
     - errcheck
-    - exportloopref
+    - copyloopvar
     - gocritic
     - gocyclo
-    - gofmt
-    - goimports
     - gosec
     - goprintffuncname
-    - gosimple
     - govet
     - ineffassign
     - misspell
     - nakedret
     - nolintlint
     - revive
     - staticcheck
-    - stylecheck
-    - typecheck
     - unconvert
     - unused
     - whitespace
 
-linters-settings:
-  goimports:
-    local-prefixes: github.com/thought-machine/prometheus-adapter
-  revive:
-    rules:
-      - name: exported
-        arguments:
-          - disableStutteringCheck
+  settings:
+    revive:
+      rules:
+        - name: exported
+          arguments:
+            - disableStutteringCheck
+
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  settings:
+    goimports:
+      local-prefixes:
+        - github.com/thought-machine/prometheus-adapter

Makefile

@@ -1,15 +1,14 @@
-REGISTRY?=gcr.io/k8s-staging-prometheus-adapter
 IMAGE=prometheus-adapter
 ARCH?=$(shell go env GOARCH)
 ALL_ARCH=amd64 arm arm64 ppc64le s390x
-GOPATH:=$(shell go env GOPATH)
+GOPATH := $(shell echo $(GOPATH) | cut -d: -f1)
 
 VERSION=$(shell cat VERSION)
 TAG_PREFIX=v
 TAG?=$(TAG_PREFIX)$(VERSION)
 
-GO_VERSION?=1.22.5
-GOLANGCI_VERSION?=1.56.2
+GO_VERSION?=$(shell grep -E '^go [0-9.]+' go.mod | awk '{print $$2}')
+GOLANGCI_VERSION?=2.8.0
 
 .PHONY: all
 all: prometheus-adapter
@@ -24,7 +23,7 @@ prometheus-adapter: $(SRC_DEPS)
 
 .PHONY: container
 container:
-	docker build -t $(REGISTRY)/$(IMAGE)-$(ARCH):$(TAG) --build-arg ARCH=$(ARCH) --build-arg GO_VERSION=$(GO_VERSION) .
+	docker build -t $(IMAGE)-$(ARCH):$(TAG) --build-arg ARCH=$(ARCH) --build-arg GO_VERSION=$(GO_VERSION) .
 
 # Container push
 # --------------
@@ -33,20 +32,7 @@ PUSH_ARCH_TARGETS=$(addprefix push-,$(ALL_ARCH))
 
 .PHONY: push
 push: container
-	docker push $(REGISTRY)/$(IMAGE)-$(ARCH):$(TAG)
-
-push-all: $(PUSH_ARCH_TARGETS) push-multi-arch;
-
-.PHONY: $(PUSH_ARCH_TARGETS)
-$(PUSH_ARCH_TARGETS): push-%:
-	ARCH=$* $(MAKE) push
-
-.PHONY: push-multi-arch
-push-multi-arch: export DOCKER_CLI_EXPERIMENTAL = enabled
-push-multi-arch:
-	docker manifest create --amend $(REGISTRY)/$(IMAGE):$(TAG) $(shell echo $(ALL_ARCH) | sed -e "s~[^ ]*~$(REGISTRY)/$(IMAGE)\-&:$(TAG)~g")
-	@for arch in $(ALL_ARCH); do docker manifest annotate --arch $${arch} $(REGISTRY)/$(IMAGE):$(TAG) $(REGISTRY)/$(IMAGE)-$${arch}:$(TAG); done
-	docker manifest push --purge $(REGISTRY)/$(IMAGE):$(TAG)
+	docker push $(IMAGE)-$(ARCH):$(TAG)
 
 # Test
 # ----
@@ -72,7 +58,7 @@ update: update-lint update-generated
 # Format and lint
 # ---------------
 
-HAS_GOLANGCI_VERSION:=$(shell $(GOPATH)/bin/golangci-lint version --short)
+HAS_GOLANGCI_VERSION:=$(shell $(GOPATH)/bin/golangci-lint version)
 .PHONY: golangci
 golangci:
 ifneq ($(HAS_GOLANGCI_VERSION), $(GOLANGCI_VERSION))