chore: add golangci-lint configuration

Adapt it from Talos repo.

Signed-off-by: Alexey Palazhchenko <alexey.palazhchenko@gmail.com>

.dockerignore

@@ -8,6 +8,7 @@
 !pkg
 !sfyra
 !templates
+!.golangci.yml
 !go.mod
 !go.sum
 !*.go

.golangci.yml

@@ -0,0 +1,189 @@
+# This file contains all available configuration options
+# with their default values.
+
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  # concurrency: 4
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 10m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+  # which files to skip: they will be analyzed, but issues from them
+  # won't be reported. Default value is empty list, but there is
+  # no need to include all autogenerated files, we confidently recognize
+  # autogenerated files. If it's not please let us know.
+  skip-files:
+    - .*\\.pb\\.go$
+
+  # list of build tags, all linters use it. Default is empty list.
+  build-tags: []
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: line-number
+
+# all available settings of specific linters
+linters-settings:
+  errcheck:
+    # report about not checking of errors in type assetions: `a := b.(MyStruct)`;
+    # default is false: such cases aren't reported by default.
+    check-type-assertions: true
+
+    # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;
+    # default is false: such cases aren't reported by default.
+    check-blank: true
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  gocyclo:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 10
+  maligned:
+    # print struct with more effective memory layout or not, false by default
+    suggest-new: true
+  dupl:
+    # tokens count to trigger issue, 150 by default
+    threshold: 100
+  goconst:
+    # minimal length of string constant, 3 by default
+    min-len: 3
+    # minimal occurrences count to trigger, 3 by default
+    min-occurrences: 3
+  depguard: {}
+  misspell:
+    # Correct spellings using locale preferences for US or UK.
+    # Default is to use a neutral variety of English.
+    # Setting locale to US will correct the British spelling of 'colour' to 'color'.
+    locale: US
+  lll:
+    # max line length, lines longer will be reported. Default is 120.
+    # '\t' is counted as 1 character by default, and can be changed with the tab-width option
+    line-length: 200
+    # tab width in spaces. Default to 1.
+    tab-width: 1
+  unused:
+    # treat code as a program (not a library) and report unused exported identifiers; default is false.
+    # XXX: if you enable this setting, unused will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find funcs usages. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  unparam:
+    # call graph construction algorithm (cha, rta). In general, use cha for libraries,
+    # and rta for programs with main packages. Default is cha.
+    algo: cha
+
+    # Inspect exported functions, default is false. Set to true if no external program/library imports your code.
+    # XXX: if you enable this setting, unparam will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find external interfaces. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  nakedret:
+    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
+    max-func-lines: 30
+  nolintlint:
+    allow-unused: false
+    allow-leading-space: false
+    allow-no-explanation: []
+    require-explanation: false
+    require-specific: true
+  prealloc:
+    # XXX: we don't recommend using this linter before doing performance profiling.
+    # For most programs usage of prealloc will be a premature optimization.
+
+    # Report preallocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
+    # True by default.
+    simple: true
+    range-loops: true # Report preallocation suggestions on range loops, true by default
+    for-loops: false # Report preallocation suggestions on for loops, false by default
+  gci:
+    local-prefixes: github.com/talos-systems/sidero
+  cyclop:
+    # the maximal code complexity to report
+    max-complexity: 20
+
+linters:
+  enable-all: true
+  disable:
+    # FIXME those linters should be enabled ASAP
+    - cyclop
+    - errcheck
+    - forcetypeassert
+    - gci
+    - gocyclo
+    - godot
+    - golint
+    - govet
+    - lll
+    - misspell
+    - nlreturn
+    - predeclared
+    - revive
+    - staticcheck
+    - stylecheck
+
+    - gas
+    - typecheck
+    - gochecknoglobals
+    - gochecknoinits
+    - ifshort
+    - forbidigo
+    - funlen
+    - godox
+    - gocognit
+    - gomnd
+    - goerr113
+    - nestif
+    - exhaustivestruct
+    - errorlint
+    - paralleltest
+    - thelper
+    - wrapcheck
+    # abandoned linters for which golangci shows the warning that the repo is archived by the owner
+    - interfacer
+    - maligned
+  disable-all: false
+  fast: false
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - ^ST1000 # ST1000: package comment should be of the form "Package services ..." (stylecheck)
+
+  exclude-rules: []
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: false
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same: 0
+
+  # Show only new issues: if there are unstaged changes or untracked files,
+  # only those changes are analyzed, else only changes in HEAD~ are analyzed.
+  # It's a super-useful option for integration of golangci-lint into existing
+  # large codebase. It's not practical to fix all existing issues at the moment
+  # of integration: much better don't allow issues in new code.
+  # Default is false.
+  new: false

Dockerfile

@@ -38,7 +38,7 @@ ENV GOMODCACHE /.cache/mod
 RUN --mount=type=cache,target=/.cache go install sigs.k8s.io/controller-tools/cmd/controller-gen@v0.5.0
 RUN --mount=type=cache,target=/.cache go install k8s.io/code-generator/cmd/conversion-gen@v0.21.0
 RUN --mount=type=cache,target=/.cache go install mvdan.cc/gofumpt/gofumports@v0.1.1
-RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b /usr/local/bin v1.28.0
+RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b /toolchain/bin v1.38.0
 WORKDIR /src
 COPY ./go.mod ./
 COPY ./go.sum ./
@@ -206,9 +206,10 @@ RUN --mount=type=cache,target=/.cache --mount=type=cache,target=/root/.cache/go-
 # The lint target performs linting on the source code.
 #
 FROM base AS lint-go
+COPY .golangci.yml .
 ENV GOGC=50
 ENV GOLANGCI_LINT_CACHE /.cache/lint
-RUN --mount=type=cache,target=/.cache /usr/local/bin/golangci-lint run --enable-all --disable gochecknoglobals,gochecknoinits,lll,goerr113,funlen,nestif,maligned,gomnd,gocognit,gocyclo
+RUN --mount=type=cache,target=/.cache golangci-lint run --config .golangci.yml
 ARG MODULE
 RUN --mount=type=cache,target=/.cache FILES="$(gofumports -l -local ${MODULE} .)" && test -z "${FILES}" || (echo -e "Source code is not formatted with 'gofumports -w -local ${MODULE} .':\n${FILES}"; exit 1)
 #
@@ -243,9 +244,10 @@ RUN --mount=type=cache,target=/.cache go list -mod=readonly all >/dev/null
 RUN --mount=type=cache,target=/.cache ! go mod tidy -v 2>&1 | grep .
 
 FROM sfyra-base AS lint-sfyra
+COPY .golangci.yml .
 ENV GOGC=50
 ENV GOLANGCI_LINT_CACHE /.cache/lint
-RUN --mount=type=cache,target=/.cache /usr/local/bin/golangci-lint run --enable-all --disable gochecknoglobals,gochecknoinits,lll,goerr113,funlen,nestif,maligned,gomnd,gocognit,gocyclo,godox
+RUN --mount=type=cache,target=/.cache golangci-lint run --config .golangci.yml
 ARG MODULE
 RUN --mount=type=cache,target=/.cache FILES="$(gofumports -l -local ${MODULE} .)" && test -z "${FILES}" || (echo -e "Source code is not formatted with 'gofumports -w -local ${MODULE} .':\n${FILES}"; exit 1)
 

app/cluster-api-provider-sidero/api/v1alpha2/metalcluster_conversion.go

@@ -2,7 +2,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-// nolint: golint,stylecheck
+//nolint:golint,stylecheck
 package v1alpha2
 
 import (

app/cluster-api-provider-sidero/api/v1alpha2/metalmachine_conversion.go

@@ -2,7 +2,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-// nolint: golint,stylecheck
+//nolint:golint,stylecheck
 package v1alpha2
 
 import (

app/cluster-api-provider-sidero/api/v1alpha2/metalmachinetemplate_conversion.go

@@ -2,7 +2,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-// nolint: golint,stylecheck
+//nolint:golint,stylecheck
 package v1alpha2
 
 import (

app/cluster-api-provider-sidero/main.go

@@ -31,7 +31,7 @@ var (
 	setupLog = ctrl.Log.WithName("setup")
 )
 
-// nolint: wsl
+//nolint:wsl
 func init() {
 	_ = clientgoscheme.AddToScheme(scheme)
 	_ = capiv1.AddToScheme(scheme)

app/metal-controller-manager/api/v1alpha1/server_types_test.go

@@ -2,7 +2,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-// nolint: scopelint
+//nolint:scopelint
 package v1alpha1_test
 
 import (

app/metal-controller-manager/controllers/suite_test.go

@@ -10,7 +10,6 @@ import (
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-
 	"k8s.io/client-go/kubernetes/scheme"
 	"k8s.io/client-go/rest"
 	"sigs.k8s.io/controller-runtime/pkg/client"

app/metal-controller-manager/internal/ipxe/ipxe_server.go

@@ -73,7 +73,7 @@ func bootFileHandler(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, bootFile)
 }
 
-//nolint: unparam
+//nolint:unparam
 func bootFromDiskHandler(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, ipxeBootFromDisk)
 }

app/metal-controller-manager/internal/power/api/api.go

@@ -32,7 +32,7 @@ func NewClient(spec metalv1alpha1.ManagementAPI) (*Client, error) {
 func (c *Client) postRequest(path string) error {
 	failureMode := DefaultDice.Roll()
 
-	switch failureMode { //nolint: exhaustive
+	switch failureMode { //nolint:exhaustive
 	case ExplicitFailure:
 		return fmt.Errorf("simulated failure from the power management")
 	case SilentFailure:
@@ -91,7 +91,7 @@ func (c *Client) SetPXE() error {
 func (c *Client) IsPoweredOn() (bool, error) {
 	failureMode := DefaultDice.Roll()
 
-	switch failureMode { //nolint: exhaustive
+	switch failureMode { //nolint:exhaustive
 	case ExplicitFailure:
 		return false, fmt.Errorf("simulated failure from the power management")
 	case SilentFailure:

app/metal-controller-manager/main.go

@@ -43,7 +43,7 @@ var (
 	setupLog = ctrl.Log.WithName("setup")
 )
 
-// nolint: wsl
+//nolint:wsl
 func init() {
 	_ = clientgoscheme.AddToScheme(scheme)
 

sfyra/cmd/sfyra/cmd/test_integration.go

@@ -48,7 +48,7 @@ var testIntegrationCmd = &cobra.Command{
 			}
 
 			if !options.SkipTeardown {
-				defer bootstrapCluster.TearDown(ctx) //nolint: errcheck
+				defer bootstrapCluster.TearDown(ctx) //nolint:errcheck
 			}
 
 			if err = bootstrapCluster.Setup(ctx); err != nil {
@@ -73,7 +73,7 @@ var testIntegrationCmd = &cobra.Command{
 			}
 
 			if !options.SkipTeardown {
-				defer managementSet.TearDown(ctx) //nolint: errcheck
+				defer managementSet.TearDown(ctx) //nolint:errcheck
 			}
 
 			if err = managementSet.Setup(ctx); err != nil {

sfyra/pkg/tests/server_class.go

@@ -121,7 +121,7 @@ func TestServerClassPatch(ctx context.Context, metalClient client.Client, cluste
 		dummyServer, err := createDummyServer(ctx, metalClient, "dummyserver-0", dummySpec)
 		require.NoError(t, err)
 
-		//nolint: errcheck
+		//nolint:errcheck
 		defer metalClient.Delete(ctx, &dummyServer)
 
 		installConfig := talosconfig.InstallConfig{
@@ -152,7 +152,7 @@ func TestServerClassPatch(ctx context.Context, metalClient client.Client, cluste
 		dummyClass, err := createServerClass(ctx, metalClient, "dummyservers", classSpec)
 		require.NoError(t, err)
 
-		//nolint: errcheck
+		//nolint:errcheck
 		defer metalClient.Delete(ctx, &dummyClass)
 
 		// Create "cluster" using serverclass above
@@ -214,7 +214,7 @@ func TestServerClassPatch(ctx context.Context, metalClient client.Client, cluste
 			require.NoError(t, err)
 
 			if obj.GroupVersionKind().Kind == "Cluster" {
-				//nolint: errcheck
+				//nolint:errcheck
 				defer dr.Delete(ctx, obj.GetName(), metav1.DeleteOptions{})
 			}
 		}