fix(backend): enable more Go linters

.golangci.yml

@@ -0,0 +1,40 @@
+run:
+  deadline: 5m
+
+output:
+  sort-results: true
+
+linters:
+  enable:
+    - depguard
+    - gofumpt
+    - goimports
+    - revive
+    - misspell
+    - staticcheck
+    - promlinter
+    - tenv
+    - errorlint
+    - exportloopref
+    - predeclared
+    - maligned
+
+issues:
+  max-same-issues: 0
+  exclude-rules:
+    - path: _test.go
+      linters:
+        - maligned
+
+linters-settings:
+  depguard:
+    list-type: blacklist
+    include-go-root: true
+    packages-with-error-message:
+      - io/ioutil: "Use corresponding 'os' or 'io' functions instead."
+  goimports:
+    local-prefixes: github.com/prymitive/karma
+  gofumpt:
+    extra-rules: true
+  maligned:
+    suggest-new: true

cmd/karma/acl.go

@@ -17,9 +17,7 @@ const (
 	aclActionAllow          = "allow"
 )
 
-var (
-	allACLActions = []string{aclActionAllow, aclActionBlock, aclActionRequireMatcher}
-)
+var allACLActions = []string{aclActionAllow, aclActionBlock, aclActionRequireMatcher}
 
 type silenceFilter struct {
 	Name       string

cmd/karma/alerts.go

@@ -25,7 +25,7 @@ func getFiltersFromQuery(filterStrings []string) []filters.FilterT {
 	return matchFilters
 }
 
-func countLabel(countStore map[string]map[string]int, key string, val string) {
+func countLabel(countStore map[string]map[string]int, key, val string) {
 	if _, found := countStore[key]; !found {
 		countStore[key] = make(map[string]int)
 	}

cmd/karma/assets.go

@@ -18,7 +18,7 @@ func contentText(w http.ResponseWriter) {
 	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
 }
 
-func serveFileOr404(path string, contentType string) http.HandlerFunc {
+func serveFileOr404(path, contentType string) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
 		if path == "" {

cmd/karma/assets_test.go

@@ -124,7 +124,7 @@ func TestStaticFiles(t *testing.T) {
 		mime string
 	}
 
-	var staticFileTests = []staticFileTestCase{
+	staticFileTests := []staticFileTestCase{
 		{
 			path: "/favicon.ico",
 			code: 200,
@@ -185,7 +185,7 @@ func TestStaticFilesPrefix(t *testing.T) {
 		mime string
 	}
 
-	var staticFilePrefixTests = []staticFileTestCase{
+	staticFilePrefixTests := []staticFileTestCase{
 		{
 			path: "/sub/favicon.ico",
 			code: 200,

cmd/karma/auth_headers_test.go

@@ -64,7 +64,7 @@ func TestAuthHeader(t *testing.T) {
 	defer httpmock.DeactivateAndReset()
 
 	for _, testCase := range authHeaderTests {
-		testCase := testCase //scopelint pin
+		testCase := testCase // scopelint pin
 		for _, version := range mock.ListAllMocks() {
 			apiCache, _ = lru.New(100)
 
@@ -85,7 +85,8 @@ func TestAuthHeader(t *testing.T) {
 				"metrics",
 				"api/v2/status",
 				"api/v2/silences",
-				"api/v2/alerts/groups"} {
+				"api/v2/alerts/groups",
+			} {
 
 				uri := fmt.Sprintf("%s/%s", testCase.alertmanagerURI, m)
 

cmd/karma/main.go

@@ -167,7 +167,7 @@ func setupRouter(router *chi.Mux, historyPoller *historyPoller) {
 		}
 	}
 
-	walkFunc := func(method string, route string, handler http.Handler, middlewares ...func(http.Handler) http.Handler) error {
+	walkFunc := func(method, route string, handler http.Handler, middlewares ...func(http.Handler) http.Handler) error {
 		log.Debug().
 			Str("method", method).
 			Str("route", route).
@@ -235,6 +235,7 @@ func setupUpstreams() error {
 func msgFormatter(msg any) string {
 	return fmt.Sprintf("msg=%q", msg)
 }
+
 func lvlFormatter(level any) string {
 	if level == nil {
 		return ""
@@ -425,7 +426,7 @@ func writePidFile() error {
 	if pidFile != "" {
 		log.Info().Str("path", pidFile).Msg("Writing PID file")
 		pid := os.Getpid()
-		err := os.WriteFile(pidFile, []byte(strconv.Itoa(pid)), 0644)
+		err := os.WriteFile(pidFile, []byte(strconv.Itoa(pid)), 0o644)
 		if err != nil {
 			return fmt.Errorf("failed to write a PID file: %w", err)
 		}

cmd/karma/proxy_test.go

@@ -213,7 +213,7 @@ func TestProxyHeaders(t *testing.T) {
 	defer httpmock.DeactivateAndReset()
 
 	for _, testCase := range proxyHeaderTests {
-		testCase := testCase //scopelint pin
+		testCase := testCase // scopelint pin
 		r := testRouter()
 		am, err := alertmanager.NewAlertmanager(
 			"cluster",

cmd/karma/script_test.go

@@ -43,7 +43,6 @@ func TestMain(m *testing.M) {
 		ecode = 1
 	}
 	os.Exit(ecode)
-
 }
 
 func TestScripts(t *testing.T) {

cmd/karma/tests/testscript/059_log_full_config_env.txt

@@ -209,9 +209,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 1234"
 level=info msg="  prefix: /prefix/"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/tests/testscript/060_log_full_config_file.txt

@@ -242,9 +242,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 8080"
 level=info msg="  prefix: /"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/tests/testscript/065_proxy-with-readonly.txt

@@ -104,9 +104,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 8080"
 level=info msg="  prefix: /"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/tests/testscript/066_proxy.txt

@@ -104,9 +104,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 8080"
 level=info msg="  prefix: /"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/tests/testscript/067_readonly.txt

@@ -104,9 +104,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 8080"
 level=info msg="  prefix: /"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/tests/testscript/070_upper_case_keys.txt

@@ -114,9 +114,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 8080"
 level=info msg="  prefix: /"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/tests/testscript/097_proxy_url_config.txt

@@ -104,9 +104,9 @@ level=info msg="    key: \"\""
 level=info msg="  port: 8080"
 level=info msg="  prefix: /"
 level=info msg="log:"
-level=info msg="  config: true"
 level=info msg="  level: info"
 level=info msg="  format: text"
+level=info msg="  config: true"
 level=info msg="  requests: false"
 level=info msg="  timestamp: false"
 level=info msg="receivers:"

cmd/karma/views.go

@@ -680,7 +680,7 @@ func silences(w http.ResponseWriter, r *http.Request) {
 		recentFirst = false
 	}
 
-	sort.Slice(dedupedSilences, func(i int, j int) bool {
+	sort.Slice(dedupedSilences, func(i, j int) bool {
 		if dedupedSilences[i].Silence.EndsAt.Equal(dedupedSilences[j].Silence.EndsAt) {
 			if dedupedSilences[i].Silence.StartsAt.Equal(dedupedSilences[j].Silence.StartsAt) {
 				return dedupedSilences[i].Silence.ID < dedupedSilences[j].Silence.ID

cmd/karma/views_test.go

@@ -3044,6 +3044,7 @@ func (ew *gzErrWriter) Write(p []byte) (n int, err error) {
 	}
 	return len(p), nil
 }
+
 func (ew *gzErrWriter) Close() error {
 	if ew.failClose {
 		return errors.New("Close error")

internal/alertmanager/dedup.go

@@ -242,7 +242,6 @@ func DedupKnownLabelValues(name string) []string {
 			for _, alert := range ag.Alerts {
 				if v := alert.Labels.Get(name); v != nil {
 					dedupedValues[v.Value] = true
-
 				}
 			}
 		}

internal/alertmanager/models.go

@@ -37,6 +37,7 @@ type HealthCheck struct {
 }
 
 // Alertmanager represents Alertmanager upstream instance
+// nolint: maligned
 type Alertmanager struct {
 	URI            string        `json:"uri"`
 	ExternalURI    string        `json:"-"`

internal/alertmanager/upstream.go

@@ -18,9 +18,7 @@ import (
 // Option allows to pass functional options to NewAlertmanager()
 type Option func(am *Alertmanager) error
 
-var (
-	upstreams = map[string]*Alertmanager{}
-)
+var upstreams = map[string]*Alertmanager{}
 
 // NewAlertmanager creates a new Alertmanager instance
 func NewAlertmanager(cluster, name, upstreamURI string, opts ...Option) (*Alertmanager, error) {

internal/config/config.go

@@ -26,10 +26,8 @@ import (
 	yaml "gopkg.in/yaml.v3"
 )
 
-var (
-	// Config will hold final configuration read from the file and flags
-	Config *configSchema
-)
+// Config will hold final configuration read from the file and flags
+var Config *configSchema
 
 func init() {
 	Config = &configSchema{}

internal/config/config_test.go

@@ -133,9 +133,9 @@ listen:
   port: 80
   prefix: /
 log:
-  config: false
   level: info
   format: text
+  config: false
   requests: false
   timestamp: false
 receivers:

internal/config/models.go

@@ -107,6 +107,7 @@ type configSchema struct {
 		Author   string
 		Comment  string
 	} `yaml:"alertAcknowledgement" koanf:"alertAcknowledgement"`
+	// nolint: maligned
 	Annotations struct {
 		Default struct {
 			Hidden bool
@@ -182,9 +183,9 @@ type configSchema struct {
 		Prefix string
 	}
 	Log struct {
-		Config    bool
 		Level     string
 		Format    string
+		Config    bool
 		Requests  bool
 		Timestamp bool
 	}
@@ -205,6 +206,7 @@ type configSchema struct {
 			Labels []string
 		}
 	} `yaml:"silenceForm" koanf:"silenceForm"`
+	// nolint: maligned
 	UI struct {
 		Refresh              time.Duration
 		HideFiltersWhenIdle  bool   `yaml:"hideFiltersWhenIdle" koanf:"hideFiltersWhenIdle"`

internal/filters/autocomplete_test.go

@@ -63,7 +63,8 @@ var acTests = []acTest{
 								CreatedBy: "me@example.com",
 								TicketID:  "JIRA-1",
 							},
-						}},
+						},
+					},
 				},
 				SilencedBy: []string{"1234567890"},
 			},

internal/filters/filter_cluster.go

@@ -30,7 +30,6 @@ func (filter *alertmanagerClusterFilter) Match(alert *models.Alert, matches int)
 
 func (filter *alertmanagerClusterFilter) MatchAlertmanager(am *models.AlertmanagerInstance) bool {
 	return filter.Matcher.Compare(am.Cluster, filter.Value)
-
 }
 
 func newAlertmanagerClusterFilter() FilterT {

internal/mapper/round_tripper.go

@@ -21,7 +21,7 @@ func (hrt *headersRoundTripper) RoundTrip(r *http.Request) (*http.Response, erro
 	return hrt.inner.RoundTrip(r)
 }
 
-func SetAuth(inner http.RoundTripper, username string, password string) http.RoundTripper {
+func SetAuth(inner http.RoundTripper, username, password string) http.RoundTripper {
 	return &authRoundTripper{
 		inner:    inner,
 		Username: username,

internal/mock/mock.go

@@ -10,21 +10,21 @@ import (
 )
 
 // GetAbsoluteMockPath returns absolute path for given mock file
-func GetAbsoluteMockPath(filename string, version string) string {
+func GetAbsoluteMockPath(filename, version string) string {
 	_, f, _, _ := runtime.Caller(0)
 	cwd := filepath.Dir(f)
 	return path.Join(cwd, version, filename)
 }
 
 // GetMockResponder returns a httpmock.Responder for given file/version
-func GetMockResponder(url string, version string, filename string) httpmock.Responder {
+func GetMockResponder(url, version, filename string) httpmock.Responder {
 	fullPath := GetAbsoluteMockPath(filename, version)
 	mockJSON, _ := os.ReadFile(fullPath)
 	return httpmock.NewBytesResponder(200, mockJSON)
 }
 
 // RegisterURL for given url and return 200 status register mock http responder
-func RegisterURL(url string, version string, filename string) {
+func RegisterURL(url, version, filename string) {
 	httpmock.RegisterResponder("GET", url, GetMockResponder(url, version, filename))
 }
 

internal/models/annotation.go

@@ -26,11 +26,12 @@ type Annotations []Annotation
 
 func (a Annotations) Len() int {
 	return len(a)
-
 }
+
 func (a Annotations) Swap(i, j int) {
 	a[i], a[j] = a[j], a[i]
 }
+
 func (a Annotations) Less(i, j int) bool {
 	// Sort the anotations listed in config.Config.Annotations.Order first, in
 	// the order they appear in that list; remaining annotations are sorted alphabetically.

internal/models/api.go

@@ -59,9 +59,11 @@ type LabelValueStatsList []LabelValueStats
 func (lvsl LabelValueStatsList) Len() int {
 	return len(lvsl)
 }
+
 func (lvsl LabelValueStatsList) Swap(i, j int) {
 	lvsl[i], lvsl[j] = lvsl[j], lvsl[i]
 }
+
 func (lvsl LabelValueStatsList) Less(i, j int) bool {
 	if lvsl[i].Hits == lvsl[j].Hits {
 		return sortorder.NaturalLess(lvsl[i].Value, lvsl[j].Value)
@@ -81,9 +83,11 @@ type LabelNameStatsList []LabelNameStats
 func (lnsl LabelNameStatsList) Len() int {
 	return len(lnsl)
 }
+
 func (lnsl LabelNameStatsList) Swap(i, j int) {
 	lnsl[i], lnsl[j] = lnsl[j], lnsl[i]
 }
+
 func (lnsl LabelNameStatsList) Less(i, j int) bool {
 	if lnsl[i].Hits == lnsl[j].Hits {
 		return lnsl[i].Name < lnsl[j].Name
@@ -144,7 +148,6 @@ func (ag *APIAlertGroup) dedupLabels() {
 	}
 
 	ag.Shared.Labels = sharedLabels
-
 }
 
 func (ag *APIAlertGroup) removeGroupingLabels(dropNames []string) {
@@ -417,6 +420,7 @@ type LabelSettings struct {
 type LabelsSettings map[string]LabelSettings
 
 // Settings is used to export karma configuration that is used by UI
+// nolint: maligned
 type Settings struct {
 	AnnotationsDefaultHidden bool                         `json:"annotationsDefaultHidden"`
 	AnnotationsHidden        []string                     `json:"annotationsHidden"`
@@ -444,6 +448,7 @@ type APIGrid struct {
 	StateCount  map[string]int  `json:"stateCount"`
 }
 
+// nolint: maligned
 type AlertsRequest struct {
 	Filters           []string       `json:"filters"`
 	GridLabel         string         `json:"gridLabel"`

internal/models/api_test.go

@@ -183,7 +183,7 @@ func TestDedupWithBadSource(t *testing.T) {
 }
 
 func TestNameStatsSort(t *testing.T) {
-	var nameStats = models.LabelNameStatsList{
+	nameStats := models.LabelNameStatsList{
 		{
 			Name: "@state",
 			Hits: 24,

internal/regex/regex.go

@@ -17,7 +17,6 @@ func WrapRegexWithAnchors(r string) string {
 }
 
 func MustCompileAnchored(r string) *regexp.Regexp {
-
 	return regexp.MustCompile(WrapRegexWithAnchors(r))
 }
 

internal/slices/slices.go

@@ -36,7 +36,7 @@ func StringSliceToSHA1(stringArray []string) (string, error) {
 	return fmt.Sprintf("%x", h.Sum(nil)), nil
 }
 
-func StringSliceDiff(slice1 []string, slice2 []string) ([]string, []string) {
+func StringSliceDiff(slice1, slice2 []string) ([]string, []string) {
 	missing := []string{}
 	extra := []string{}
 

internal/transform/colors.go

@@ -15,7 +15,7 @@ import (
 	plcolors "gopkg.in/go-playground/colors.v1"
 )
 
-func labelToSeed(key string, val string) int64 {
+func labelToSeed(key, val string) int64 {
 	h := sha1.New()
 	_, _ = io.WriteString(h, key)
 	_, _ = io.WriteString(h, val)
@@ -66,7 +66,7 @@ func parseCustomColor(colorStore models.LabelsColorMap, key, val, customColor st
 // ColorLabel update karmaColorMap object with a color object generated
 // from label key and value passed here
 // It's used to generate unique colors for configured labels
-func ColorLabel(colorStore models.LabelsColorMap, key string, val string) {
+func ColorLabel(colorStore models.LabelsColorMap, key, val string) {
 	// first handle custom colors
 	_, ok := config.Config.Labels.Color.Custom[key]
 	if ok {

internal/transform/strip.go

@@ -13,7 +13,8 @@ import (
 // it takes the list of label keys to ignore and alert label map
 // it will return label map without labels found on the ignore list
 func StripLables(keptLabels, ignoredLabels []string, keptLabelsRegex, ignoredLabelsRegex []*regexp.Regexp,
-	sourceLabels models.Labels) models.Labels {
+	sourceLabels models.Labels,
+) models.Labels {
 	// empty keep lists means keep everything by default
 	keepAll := len(keptLabels) == 0 && len(keptLabelsRegex) == 0
 	labels := models.Labels{}

internal/uri/urls.go

@@ -8,7 +8,7 @@ import (
 
 // JoinURL can be used to join a base url (http(s)://domain.com) and a path (/my/path)
 // it will return a joined string or an error (if you supply invalid url)
-func JoinURL(base string, sub string) (string, error) {
+func JoinURL(base, sub string) (string, error) {
 	u, err := url.Parse(base)
 	if err != nil {
 		return "", err

make/go.mk

@@ -39,13 +39,15 @@ $(GOBIN)/golangci-lint: tools/golangci-lint/go.mod tools/golangci-lint/go.sum
 	go install -modfile=tools/golangci-lint/go.mod github.com/golangci/golangci-lint/cmd/golangci-lint
 .PHONY: lint-go
 lint-go: $(GOBIN)/golangci-lint lint-go-looppointer
-	$(ENV) golangci-lint run -v --timeout 5m -E staticcheck,misspell,promlinter,revive,tenv,errorlint,exportloopref,predeclared
+	$(ENV) golangci-lint run -v
 
-$(GOBIN)/lint-go-goimports: tools/goimports/go.mod tools/goimports/go.sum
+$(GOBIN)/goimports: tools/goimports/go.mod tools/goimports/go.sum
 	go install -modfile=tools/goimports/go.mod golang.org/x/tools/cmd/goimports
+$(GOBIN)/gofumpt: tools/gofumpt/go.mod tools/gofumpt/go.sum
+	go install -modfile=tools/gofumpt/go.mod mvdan.cc/gofumpt
 .PHONY: format-go
-format-go: $(GOBIN)/lint-go-goimports
-	gofmt -l -s -w .
+format-go: $(GOBIN)/goimports $(GOBIN)/gofumpt
+	gofumpt -extra -w .
 	goimports -local github.com/prymitive/karma -w .
 
 .PHONY: download-deps-go

tools/gofumpt/go.mod

@@ -0,0 +1,13 @@
+module _
+
+go 1.18
+
+require mvdan.cc/gofumpt v0.3.1
+
+require (
+	github.com/google/go-cmp v0.5.7 // indirect
+	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
+	golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 // indirect
+	golang.org/x/tools v0.1.10 // indirect
+)

tools/gofumpt/go.sum

@@ -0,0 +1,20 @@
+github.com/frankban/quicktest v1.14.2 h1:SPb1KFFmM+ybpEjPUhCCkZOM5xlovT5UbrMvWnXyBns=
+github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
+github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e h1:aoZm08cpOy4WuID//EZDgcC4zIxODThtZNPirFr42+A=
+github.com/rogpeppe/go-internal v1.8.1 h1:geMPLpDpQOgVyCg5z5GoRwLHepNdb71NXb67XFkP+Eg=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 h1:6zppjxzCulZykYSLyVDYbneBfbaBIQPYMevg0bEwv2s=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 h1:OH54vjqzRWmbJ62fjuhxy7AxFFgoHN0/DPc/UrL8cAs=
+golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/tools v0.1.10 h1:QjFRCZxdOhBJ/UNgnBZLbNV13DlbnK0quyivTnXJM20=
+golang.org/x/tools v0.1.10/go.mod h1:Uh6Zz+xoGYZom868N8YTex3t7RhtHDBrE8Gzo9bV56E=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+gopkg.in/errgo.v2 v2.1.0 h1:0vLT13EuvQ0hNvakwLuFZ/jYrLp5F3kcWHXdRggjCE8=
+mvdan.cc/gofumpt v0.3.1 h1:avhhrOmv0IuvQVK7fvwV91oFSGAk5/6Po8GXTzICeu8=
+mvdan.cc/gofumpt v0.3.1/go.mod h1:w3ymliuxvzVx8DAutBnVyDqYb1Niy/yCJt/lk821YCE=

tools/gofumpt/main.go

@@ -0,0 +1,7 @@
+//go:build tools
+
+package tools
+
+import (
+	_ "mvdan.cc/gofumpt"
+)