feat: implement stricter lint rules git golanci-lint v2 (#538)

* feat: implement stricter lint rules git golanci-lint v2

* fix lint issues

* fix lint issues

.github/workflows/go.yml

@@ -22,10 +22,8 @@ jobs:
         with:
           go-version-file: "go.mod"
 
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
-        with:
-          skip-cache: true
+      - name: Lint
+        run: make lint
 
   test:
     name: test

.golangci.yaml

@@ -0,0 +1,209 @@
+version: '2'
+linters:
+  enable:
+    - asciicheck
+    - bidichk
+    - bodyclose
+    - canonicalheader
+    - containedctx
+    - copyloopvar
+    - decorder
+    - dogsled
+    - dupword
+    - durationcheck
+    - err113
+    - errname
+    - errorlint
+    - exptostd
+    - fatcontext
+    - forcetypeassert
+    - gocheckcompilerdirectives
+    - gochecksumtype
+    - gocritic
+    - godot
+    - gomodguard
+    - goprintffuncname
+    - gosmopolitan
+    - grouper
+    - iface
+    - importas
+    - inamedparam
+    - interfacebloat
+    - intrange
+    - loggercheck
+    - makezero
+    - mirror
+    - misspell
+    - nilerr
+    - nilnesserr
+    - noctx
+    - nolintlint
+    - nosprintfhostport
+    - perfsprint
+    - predeclared
+    - promlinter
+    - protogetter
+    - reassign
+    - revive
+    - rowserrcheck
+    - sloglint
+    - spancheck
+    - sqlclosecheck
+    - staticcheck
+    - tagalign
+    - testableexamples
+    - testifylint
+    - thelper
+    - unconvert
+    - unparam
+    - usestdlibvars
+    - usetesting
+    - wastedassign
+    - whitespace
+    - zerologlint
+  disable:
+    - asasalint
+    - contextcheck
+    - cyclop
+    - depguard
+    - dupl
+    - errchkjson
+    - exhaustive
+    - exhaustruct
+    - forbidigo
+    - funlen
+    - ginkgolinter
+    - gochecknoglobals
+    - gochecknoinits
+    - gocognit
+    - goconst
+    - gocyclo
+    - godox
+    - goheader
+    - gomoddirectives
+    - gosec
+    - ireturn
+    - lll
+    - maintidx
+    - musttag
+    - nakedret
+    - nestif
+    - nilnil
+    - nlreturn
+    - nonamedreturns
+    - paralleltest
+    - prealloc
+    - recvcheck
+    - tagliatelle
+    - testpackage
+    - tparallel
+    - varnamelen
+    - wrapcheck
+    - wsl
+  settings:
+    gocritic:
+      enable-all: true
+      disabled-checks:
+        - emptyFallthrough
+        - hugeParam
+        - rangeValCopy
+        - unnamedResult
+        - whyNoLint
+    govet:
+      disable:
+        - fieldalignment
+        - shadow
+      enable-all: true
+    misspell:
+      locale: US
+    revive:
+      enable-all-rules: true
+      rules:
+        - name: add-constant
+          disabled: true
+        - name: cognitive-complexity
+          disabled: true
+        - name: cyclomatic
+          disabled: true
+        - name: deep-exit
+          disabled: true
+        - name: dot-imports
+          severity: warning
+          disabled: false
+          exclude: [""]
+          arguments:
+            - allowedPackages: ["github.com/onsi/ginkgo/v2", "github.com/onsi/gomega"]
+        - name: empty-block
+          disabled: true
+        - name: exported
+          disabled: true
+        - name: filename-format
+          arguments:
+            - ^[a-z][-0-9_a-z]*(?:\.gen)?\.go$
+        - name: flag-parameter
+          disabled: true
+        - name: function-length
+          disabled: true
+        - name: function-result-limit
+          disabled: true
+        - name: import-shadowing
+          disabled: true
+        - name: line-length-limit
+          disabled: true
+        - name: max-control-nesting
+          disabled: true
+        - name: max-public-structs
+          disabled: true
+        - name: nested-structs
+          disabled: true
+        - name: package-comments
+          disabled: true
+        - name: unused-parameter
+          disabled: true
+        - name: unused-receiver
+          disabled: true
+    staticcheck:
+      checks:
+       - 'all'
+       - '-ST1000'
+  exclusions:
+    generated: lax
+    presets:
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - err113
+        text: do not define dynamic errors, use wrapped static errors instead
+      - linters:
+          - forbidigo
+        path: ^internal/cmds/
+      - linters:
+          - forcetypeassert
+        path: _test\.go$
+      - linters:
+          - forbidigo
+        path: assets/scripts/generate-commit.go
+formatters:
+  enable:
+    - gci
+    - gofmt
+    - gofumpt
+    - goimports
+    - golines
+  settings:
+    gci:
+      sections:
+        - standard
+        - default
+        - prefix(github.com/bakito/adguardhome-sync)
+    gofumpt:
+      module-path: github.com/bakito/adguardhome-sync
+      extra-rules: true
+    goimports:
+      local-prefixes:
+        - github.com/bakito/adguardhome-sync
+    golines:
+      max-len: 128
+      tab-len: 4

.golangci.yml

@@ -1,37 +0,0 @@
-run:
-  timeout: 5m
-
-linters:
-  enable:
-    - asciicheck
-    - bodyclose
-    - dogsled
-    - durationcheck
-    - errcheck
-    - errorlint
-    - gci
-    - gofmt
-    - gofumpt
-    - goimports
-    - gosec
-    - gosimple
-    - govet
-    - importas
-    - ineffassign
-    - misspell
-    - nakedret
-    - nolintlint
-    - staticcheck
-    - unconvert
-    - unparam
-    - unused
-linters-settings:
-  gosec:
-    # Exclude generated files
-    exclude-generated: true
-    excludes:
-      - G601 # not applicable in go 1.22 anymore
-  gofmt:
-    # simplify code: gofmt with `-s` option, true by default
-    simplify: true
-

.toolbox.mk

@@ -24,8 +24,8 @@ TB_SEMVER ?= $(TB_LOCALBIN)/semver
 TB_DEEPCOPY_GEN_VERSION ?= v0.32.3
 # renovate: packageName=mvdan.cc/gofumpt
 TB_GOFUMPT_VERSION ?= v0.7.0
-# renovate: packageName=github.com/golangci/golangci-lint/cmd/golangci-lint
-TB_GOLANGCI_LINT_VERSION ?= v1.64.8
+# renovate: packageName=github.com/golangci/golangci-lint/v2/cmd/golangci-lint
+TB_GOLANGCI_LINT_VERSION ?= v2.0.1
 # renovate: packageName=github.com/segmentio/golines
 TB_GOLINES_VERSION ?= v0.12.2
 # renovate: packageName=github.com/goreleaser/goreleaser/v2
@@ -53,7 +53,7 @@ $(TB_GOFUMPT): $(TB_LOCALBIN)
 .PHONY: tb.golangci-lint
 tb.golangci-lint: $(TB_GOLANGCI_LINT) ## Download golangci-lint locally if necessary.
 $(TB_GOLANGCI_LINT): $(TB_LOCALBIN)
-	test -s $(TB_LOCALBIN)/golangci-lint || GOBIN=$(TB_LOCALBIN) go install github.com/golangci/golangci-lint/cmd/golangci-lint@$(TB_GOLANGCI_LINT_VERSION)
+	test -s $(TB_LOCALBIN)/golangci-lint || GOBIN=$(TB_LOCALBIN) go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@$(TB_GOLANGCI_LINT_VERSION)
 .PHONY: tb.golines
 tb.golines: $(TB_GOLINES) ## Download golines locally if necessary.
 $(TB_GOLINES): $(TB_LOCALBIN)
@@ -95,7 +95,7 @@ tb.update: tb.reset
 	toolbox makefile --renovate -f $(TB_LOCALDIR)/Makefile \
 		k8s.io/code-generator/cmd/deepcopy-gen@github.com/kubernetes/code-generator \
 		mvdan.cc/gofumpt@github.com/mvdan/gofumpt \
-		github.com/golangci/golangci-lint/cmd/golangci-lint \
+		github.com/golangci/golangci-lint/v2/cmd/golangci-lint \
 		github.com/segmentio/golines \
 		github.com/goreleaser/goreleaser/v2 \
 		go.uber.org/mock/mockgen@github.com/uber-go/mock \

cmd/root.go

@@ -4,9 +4,10 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/spf13/cobra"
+
 	"github.com/bakito/adguardhome-sync/pkg/log"
 	"github.com/bakito/adguardhome-sync/version"
-	"github.com/spf13/cobra"
 )
 
 var (
@@ -14,7 +15,7 @@ var (
 	logger  = log.GetLogger("root")
 )
 
-// rootCmd represents the base command when called without any subcommands
+// rootCmd represents the base command when called without any subcommands.
 var rootCmd = &cobra.Command{
 	Use:     "adguardhome-sync",
 	Short:   "Synchronize config from one AdGuardHome instance to another",
@@ -25,7 +26,7 @@ var rootCmd = &cobra.Command{
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
 	if err := rootCmd.Execute(); err != nil {
-		fmt.Println(err)
+		_, _ = fmt.Println(err)
 		os.Exit(1)
 	}
 }

cmd/run.go

@@ -1,16 +1,17 @@
 package cmd
 
 import (
+	"github.com/spf13/cobra"
+
 	"github.com/bakito/adguardhome-sync/pkg/config"
 	"github.com/bakito/adguardhome-sync/pkg/log"
 	"github.com/bakito/adguardhome-sync/pkg/sync"
-	"github.com/spf13/cobra"
 )
 
-// runCmd represents the run command
+// runCmd represents the run command.
 var doCmd = &cobra.Command{
 	Use:   "run",
-	Short: "Start a synchronisation from origin to replica",
+	Short: "Start a synchronization from origin to replica",
 	Long:  `Synchronizes the configuration form an origin instance to a replica`,
 	RunE: func(cmd *cobra.Command, args []string) error {
 		logger = log.GetLogger("run")
@@ -44,21 +45,21 @@ func init() {
 	doCmd.PersistentFlags().Bool(config.FlagRunOnStart, true, "Run the sync job on start.")
 	doCmd.PersistentFlags().Bool(config.FlagPrintConfigOnly, false, "Prints the configuration only and exists. "+
 		"Can be used to debug the config E.g: when having authentication issues.")
-	doCmd.PersistentFlags().Bool(config.FlagContinueOnError, false, "If enabled, the synchronisation task "+
+	doCmd.PersistentFlags().Bool(config.FlagContinueOnError, false, "If enabled, the synchronization task "+
 		"will not fail on single errors, but will log the errors and continue.")
 
 	doCmd.PersistentFlags().
-		Int(config.FlagApiPort, 8080, "Sync API Port, the API endpoint will be started to enable remote triggering; if 0 port API is disabled.")
-	doCmd.PersistentFlags().String(config.FlagApiUsername, "", "Sync API username")
-	doCmd.PersistentFlags().String(config.FlagApiPassword, "", "Sync API password")
-	doCmd.PersistentFlags().String(config.FlagApiDarkMode, "", "API UI in dark mode")
+		Int(config.FlagAPIPort, 8080, "Sync API Port, the API endpoint will be started to enable remote triggering; if 0 port API is disabled.")
+	doCmd.PersistentFlags().String(config.FlagAPIUsername, "", "Sync API username")
+	doCmd.PersistentFlags().String(config.FlagAPIPassword, "", "Sync API password")
+	doCmd.PersistentFlags().String(config.FlagAPIDarkMode, "", "API UI in dark mode")
 
 	doCmd.PersistentFlags().Bool(config.FlagFeatureDhcpServerConfig, true, "Enable DHCP server config feature")
 	doCmd.PersistentFlags().Bool(config.FlagFeatureDhcpStaticLeases, true, "Enable DHCP server static leases feature")
 
-	doCmd.PersistentFlags().Bool(config.FlagFeatureDnsServerConfig, true, "Enable DNS server config feature")
-	doCmd.PersistentFlags().Bool(config.FlagFeatureDnsAccessLists, true, "Enable DNS server access lists feature")
-	doCmd.PersistentFlags().Bool(config.FlagFeatureDnsRewrites, true, "Enable DNS rewrites feature")
+	doCmd.PersistentFlags().Bool(config.FlagFeatureDNSServerConfig, true, "Enable DNS server config feature")
+	doCmd.PersistentFlags().Bool(config.FlagFeatureDNSAccessLists, true, "Enable DNS server access lists feature")
+	doCmd.PersistentFlags().Bool(config.FlagFeatureDNSRewrites, true, "Enable DNS rewrites feature")
 
 	doCmd.PersistentFlags().Bool(config.FlagFeatureGeneral, true, "Enable general settings feature")
 	doCmd.PersistentFlags().Bool(config.FlagFeatureQueryLog, true, "Enable query log config feature")
@@ -70,7 +71,7 @@ func init() {
 	doCmd.PersistentFlags().String(config.FlagOriginURL, "", "Origin instance url")
 	doCmd.PersistentFlags().
 		String(config.FlagOriginWebURL, "", "Origin instance web url used in the web interface (default: <origin-url>)")
-	doCmd.PersistentFlags().String(config.FlagOriginApiPath, "/control", "Origin instance API path")
+	doCmd.PersistentFlags().String(config.FlagOriginAPIPath, "/control", "Origin instance API path")
 	doCmd.PersistentFlags().String(config.FlagOriginUsername, "", "Origin instance username")
 	doCmd.PersistentFlags().String(config.FlagOriginPassword, "", "Origin instance password")
 	doCmd.PersistentFlags().String(config.FlagOriginCookie, "", "If Set, uses a cookie for authentication")
@@ -79,7 +80,7 @@ func init() {
 	doCmd.PersistentFlags().String(config.FlagReplicaURL, "", "Replica instance url")
 	doCmd.PersistentFlags().
 		String(config.FlagReplicaWebURL, "", "Replica instance web url used in the web interface (default: <replica-url>)")
-	doCmd.PersistentFlags().String(config.FlagReplicaApiPath, "/control", "Replica instance API path")
+	doCmd.PersistentFlags().String(config.FlagReplicaAPIPath, "/control", "Replica instance API path")
 	doCmd.PersistentFlags().String(config.FlagReplicaUsername, "", "Replica instance username")
 	doCmd.PersistentFlags().String(config.FlagReplicaPassword, "", "Replica instance password")
 	doCmd.PersistentFlags().String(config.FlagReplicaCookie, "", "If Set, uses a cookie for authentication")

openapi/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"log"
@@ -20,21 +21,33 @@ func main() {
 	}
 	log.Printf("Patching schema version %s\n", version)
 
-	resp, err := http.Get(
+	ctx := context.Background() // Or use context.WithTimeout
+	req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodGet,
 		fmt.Sprintf("https://raw.githubusercontent.com/AdguardTeam/AdGuardHome/%s/openapi/openapi.yaml", version),
+		http.NoBody,
 	)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
 	if err != nil {
 		log.Fatalln(err)
 	}
 	defer func() { _ = resp.Body.Close() }()
 	data, err := io.ReadAll(resp.Body)
 	if err != nil {
-		log.Fatalln(err)
+		log.Println(err)
+		return
 	}
-	schema := make(map[string]interface{})
+	schema := make(map[string]any)
 	err = yaml.Unmarshal(data, &schema)
 	if err != nil {
-		log.Fatalln(err)
+		log.Println(err)
+		return
 	}
 
 	if requestBodies, ok, _ := unstructured.NestedMap(schema, "components", "requestBodies"); ok {
@@ -47,9 +60,11 @@ func main() {
 		"paths", "/dns_info", "get", "responses", "200", "content", "application/json", "schema"); ok {
 		if allOf, ok, _ := unstructured.NestedSlice(dnsInfo, "allOf"); ok && len(allOf) == 2 {
 			delete(dnsInfo, "allOf")
-			if err := unstructured.SetNestedMap(schema, allOf[0].(map[string]interface{}),
+			//nolint:forcetypeassert
+			if err := unstructured.SetNestedMap(schema, allOf[0].(map[string]any),
 				"paths", "/dns_info", "get", "responses", "200", "content", "application/json", "schema"); err != nil {
-				log.Fatalln(err)
+				log.Println(err)
+				return
 			}
 		}
 	}
@@ -60,24 +75,26 @@ func main() {
 
 	b, err := yaml.Marshal(&schema)
 	if err != nil {
-		log.Fatalln(err)
+		log.Println(err)
+		return
 	}
 	log.Printf("Writing schema file tmp/%s", fileName)
 	err = os.WriteFile("tmp/"+fileName, b, 0o600)
 	if err != nil {
-		log.Fatalln(err)
+		log.Println(err)
+		return
 	}
 }
 
-func correctEntries(schema map[string]interface{}) {
+func correctEntries(schema map[string]any) {
 	// https://github.com/AdguardTeam/AdGuardHome/pull/7678
 	if err := unstructured.SetNestedField(schema, "string", "components", "schemas", "QueryLogItem", "properties", "client_proto", "type"); err != nil {
 		log.Fatalln(err)
 	}
 }
 
-func addFakeTags(schema map[string]interface{}) {
-	fake := map[string]interface{}{"faker": `slice_len=24`}
+func addFakeTags(schema map[string]any) {
+	fake := map[string]any{"faker": `slice_len=24`}
 	if err := unstructured.SetNestedMap(schema, fake, "components", "schemas", "Stats", "properties", "blocked_filtering", "x-oapi-codegen-extra-tags"); err != nil {
 		log.Fatalln(err)
 	}

pkg/client/client-methods.go

@@ -17,14 +17,18 @@ func (cl *client) doGet(req *resty.Request, url string) error {
 	rl.Debug("do get")
 	resp, err := req.Get(url)
 	if err != nil {
-		if resp != nil && resp.StatusCode() == http.StatusFound {
-			loc := resp.Header().Get("Location")
-			if loc == "/install.html" || loc == "/control/install.html" {
-				return ErrSetupNeeded
+		l := rl
+		if resp != nil {
+			if resp.StatusCode() == http.StatusFound {
+				loc := resp.Header().Get("Location")
+				if loc == "/install.html" || loc == "/control/install.html" {
+					return ErrSetupNeeded
+				}
 			}
+			l = l.With("status", resp.StatusCode(), "body", string(resp.Body()), "error", err)
 		}
 
-		rl.With("status", resp.StatusCode(), "body", string(resp.Body()), "error", err).Debug("error in do get")
+		l.Debug("error in do get")
 		return detailedError(resp, err)
 	}
 

pkg/client/client.go

@@ -11,19 +11,20 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/go-resty/resty/v2"
+	"go.uber.org/zap"
+
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/log"
 	"github.com/bakito/adguardhome-sync/pkg/types"
 	"github.com/bakito/adguardhome-sync/pkg/utils"
-	"github.com/go-resty/resty/v2"
-	"go.uber.org/zap"
 )
 
 const envRedirectPolicyNoOfRedirects = "REDIRECT_POLICY_NO_OF_REDIRECTS"
 
 var (
 	l = log.GetLogger("client")
-	// ErrSetupNeeded custom error
+	// ErrSetupNeeded custom error.
 	ErrSetupNeeded = errors.New("setup needed")
 )
 
@@ -33,16 +34,16 @@ func detailedError(resp *resty.Response, err error) error {
 		e += fmt.Sprintf("(%s)", string(resp.Body()))
 	}
 	if err != nil {
-		e += fmt.Sprintf(": %s", err.Error())
+		e += ": " + err.Error()
 	}
 	return errors.New(e)
 }
 
-// New create a new client
+// New create a new client.
 func New(config types.AdGuardInstance) (Client, error) {
 	var apiURL string
 	if config.APIPath == "" {
-		apiURL = fmt.Sprintf("%s/control", config.URL)
+		apiURL = config.URL + "/control"
 	} else {
 		apiURL = fmt.Sprintf("%s/%s", config.URL, config.APIPath)
 	}
@@ -84,7 +85,9 @@ func New(config types.AdGuardInstance) (Client, error) {
 	}, nil
 }
 
-// Client AdguardHome API client interface
+// Client AdguardHome API client interface.
+//
+//nolint:interfacebloat
 type Client interface {
 	Host() string
 	Status() (*model.ServerStatus, error)
@@ -116,16 +119,16 @@ type Client interface {
 	UpdateClient(client *model.Client) error
 	DeleteClient(client *model.Client) error
 	QueryLogConfig() (*model.QueryLogConfigWithIgnored, error)
-	SetQueryLogConfig(*model.QueryLogConfigWithIgnored) error
+	SetQueryLogConfig(ql *model.QueryLogConfigWithIgnored) error
 	StatsConfig() (*model.GetStatsConfigResponse, error)
 	SetStatsConfig(sc *model.PutStatsConfigUpdateRequest) error
 	Setup() error
 	AccessList() (*model.AccessList, error)
-	SetAccessList(*model.AccessList) error
+	SetAccessList(accessList *model.AccessList) error
 	DNSConfig() (*model.DNSConfig, error)
-	SetDNSConfig(*model.DNSConfig) error
+	SetDNSConfig(config *model.DNSConfig) error
 	DhcpConfig() (*model.DhcpStatus, error)
-	SetDhcpConfig(*model.DhcpStatus) error
+	SetDhcpConfig(status *model.DhcpStatus) error
 	AddDHCPStaticLease(lease model.DhcpStaticLease) error
 	DeleteDHCPStaticLease(lease model.DhcpStaticLease) error
 }
@@ -224,7 +227,7 @@ func (cl *client) toggleStatus(mode string) (bool, error) {
 }
 
 func (cl *client) toggleBool(mode string, enable bool) error {
-	cl.log.With("enable", enable).Info(fmt.Sprintf("Toggle %s", mode))
+	cl.log.With("enable", enable).Info("Toggle " + mode)
 	var target string
 	if enable {
 		target = "enable"

pkg/client/client_test.go

@@ -8,13 +8,14 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/google/uuid"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
 	"github.com/bakito/adguardhome-sync/pkg/client"
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/types"
 	"github.com/bakito/adguardhome-sync/pkg/utils"
-	"github.com/google/uuid"
-	. "github.com/onsi/ginkgo/v2"
-	. "github.com/onsi/gomega"
 )
 
 var (
@@ -140,7 +141,7 @@ var _ = Describe("Client", func() {
 			ts, cl = ClientPost(
 				"/install/configure",
 				fmt.Sprintf(
-					`{"web":{"ip":"0.0.0.0","port":3000,"status":"","can_autofix":false},"dns":{"ip":"0.0.0.0","port":53,"status":"","can_autofix":false},"username":"%s","password":"%s"}`,
+					`{"web":{"ip":"0.0.0.0","port":3000,"status":"","can_autofix":false},"dns":{"ip":"0.0.0.0","port":53,"status":"","can_autofix":false},"username":%q,"password":%q}`,
 					username,
 					password,
 				),
@@ -373,10 +374,10 @@ var _ = Describe("Client", func() {
 	})
 })
 
-func ClientGet(file string, path string) (*httptest.Server, client.Client) {
+func ClientGet(file, path string) (*httptest.Server, client.Client) {
 	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		Ω(r.URL.Path).Should(Equal(types.DefaultAPIPath + path))
-		b, err := os.ReadFile(filepath.Join("../../testdata", file))
+		b, err := os.ReadFile(filepath.Join("..", "..", "testdata", file))
 		Ω(err).ShouldNot(HaveOccurred())
 		w.Header().Set("Content-Type", "application/json")
 		_, err = w.Write(b)

pkg/client/model/client/client.go

@@ -11,19 +11,20 @@ import (
 	"net/url"
 	"path"
 
+	"go.uber.org/zap"
+
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/log"
 	"github.com/bakito/adguardhome-sync/pkg/types"
-	"go.uber.org/zap"
 )
 
 var l = log.GetLogger("client")
 
-// New create a new api client
+// New create a new api client.
 func New(config types.AdGuardInstance) (Client, error) {
 	var apiURL string
 	if config.APIPath == "" {
-		apiURL = fmt.Sprintf("%s/control", config.URL)
+		apiURL = config.URL + "/control"
 	} else {
 		apiURL = fmt.Sprintf("%s/%s", config.URL, config.APIPath)
 	}
@@ -96,7 +97,7 @@ func (a apiClient) SetFilteringConfig(ctx context.Context, config model.FilterCo
 	return write(ctx, config, a.client.FilteringConfig)
 }
 
-func write[B interface{}](
+func write[B any](
 	ctx context.Context,
 	body B,
 	req func(ctx context.Context, body B, reqEditors ...model.RequestEditorFn) (*http.Response, error),
@@ -112,7 +113,7 @@ func write[B interface{}](
 	return nil
 }
 
-func read[I interface{}](
+func read[I any](
 	ctx context.Context,
 	req func(ctx context.Context, reqEditors ...model.RequestEditorFn) (*http.Response, error),
 	parse func(rsp *http.Response) (*I, error),

pkg/client/model/client/resty.go

@@ -3,8 +3,9 @@ package client
 import (
 	"net/http"
 
-	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/go-resty/resty/v2"
+
+	"github.com/bakito/adguardhome-sync/pkg/client/model"
 )
 
 var _ model.HttpRequestDoer = &adapter{}

pkg/client/model/model-functions.go

@@ -5,13 +5,14 @@ import (
 	"sort"
 	"strings"
 
-	"github.com/bakito/adguardhome-sync/pkg/utils"
 	"github.com/jinzhu/copier"
 	"go.uber.org/zap"
 	"k8s.io/utils/ptr"
+
+	"github.com/bakito/adguardhome-sync/pkg/utils"
 )
 
-// Clone the config
+// Clone the config.
 func (c *DhcpStatus) Clone() *DhcpStatus {
 	clone := &DhcpStatus{}
 	_ = copier.Copy(clone, c)
@@ -27,16 +28,16 @@ func (c *DhcpStatus) cleanV4V6() {
 	}
 }
 
-// CleanAndEquals dhcp server config equal check where V4 and V6 are cleaned in advance
+// CleanAndEquals dhcp server config equal check where V4 and V6 are cleaned in advance.
 func (c *DhcpStatus) CleanAndEquals(o *DhcpStatus) bool {
 	c.cleanV4V6()
 	o.cleanV4V6()
 	return c.Equals(o)
 }
 
-// Equals dhcp server config equal check
+// Equals dhcp server config equal check.
 func (c *DhcpStatus) Equals(o *DhcpStatus) bool {
-	return utils.JsonEquals(c, o)
+	return utils.JSONEquals(c, o)
 }
 
 func (c *DhcpStatus) HasConfig() bool {
@@ -56,8 +57,8 @@ func (j DhcpConfigV6) isValid() bool {
 
 type DhcpStaticLeases []DhcpStaticLease
 
-// MergeDhcpStaticLeases the leases
-func MergeDhcpStaticLeases(l *[]DhcpStaticLease, other *[]DhcpStaticLease) (DhcpStaticLeases, DhcpStaticLeases) {
+// MergeDhcpStaticLeases the leases.
+func MergeDhcpStaticLeases(l, other *[]DhcpStaticLease) (adds, removes DhcpStaticLeases) {
 	var thisLeases []DhcpStaticLease
 	var otherLeases []DhcpStaticLease
 
@@ -69,8 +70,6 @@ func MergeDhcpStaticLeases(l *[]DhcpStaticLease, other *[]DhcpStaticLease) (Dhcp
 	}
 	current := make(map[string]DhcpStaticLease)
 
-	var adds DhcpStaticLeases
-	var removes DhcpStaticLeases
 	for _, le := range thisLeases {
 		current[le.Mac] = le
 	}
@@ -90,21 +89,21 @@ func MergeDhcpStaticLeases(l *[]DhcpStaticLease, other *[]DhcpStaticLease) (Dhcp
 	return adds, removes
 }
 
-// Equals dns config equal check
+// Equals dns config equal check.
 func (c *DNSConfig) Equals(o *DNSConfig) bool {
 	cc := c.Clone()
 	oo := o.Clone()
 	cc.Sort()
 	oo.Sort()
 
-	return utils.JsonEquals(cc, oo)
+	return utils.JSONEquals(cc, oo)
 }
 
 func (c *DNSConfig) Clone() *DNSConfig {
 	return utils.Clone(c, &DNSConfig{})
 }
 
-// Sort sort dns config
+// Sort dns config.
 func (c *DNSConfig) Sort() {
 	if c.UpstreamDns != nil {
 		sort.Strings(*c.UpstreamDns)
@@ -119,14 +118,14 @@ func (c *DNSConfig) Sort() {
 	}
 }
 
-// Equals access list equal check
+// Equals access list equal check.
 func (al *AccessList) Equals(o *AccessList) bool {
 	return EqualsStringSlice(al.AllowedClients, o.AllowedClients, true) &&
 		EqualsStringSlice(al.DisallowedClients, o.DisallowedClients, true) &&
 		EqualsStringSlice(al.BlockedHosts, o.BlockedHosts, true)
 }
 
-func EqualsStringSlice(a *[]string, b *[]string, sortIt bool) bool {
+func EqualsStringSlice(a, b *[]string, sortIt bool) bool {
 	if a == nil && b == nil {
 		return true
 	}
@@ -152,7 +151,7 @@ func EqualsStringSlice(a *[]string, b *[]string, sortIt bool) bool {
 	return true
 }
 
-// Sort clients
+// Sort clients.
 func (cl *Client) Sort() {
 	if cl.Ids != nil {
 		sort.Strings(*cl.Ids)
@@ -168,28 +167,26 @@ func (cl *Client) Sort() {
 	}
 }
 
-// PrepareDiff timezone BlockedServicesSchedule might differ if all other fields are empty,
-// so we skip it in diff
+// PrepareDiff so we skip it in diff.
 func (cl *Client) PrepareDiff() *string {
 	var tz *string
 	bss := cl.BlockedServicesSchedule
 	if bss != nil && bss.Mon == nil && bss.Tue == nil && bss.Wed == nil &&
 		bss.Thu == nil && bss.Fri == nil && bss.Sat == nil && bss.Sun == nil {
-
 		tz = cl.BlockedServicesSchedule.TimeZone
 		cl.BlockedServicesSchedule.TimeZone = nil
 	}
 	return tz
 }
 
-// AfterDiff reset after diff
+// AfterDiff reset after diff.
 func (cl *Client) AfterDiff(tz *string) {
 	if cl.BlockedServicesSchedule != nil {
 		cl.BlockedServicesSchedule.TimeZone = tz
 	}
 }
 
-// Equals Clients equal check
+// Equals Clients equal check.
 func (cl *Client) Equals(o *Client) bool {
 	cl.Sort()
 	o.Sort()
@@ -202,10 +199,10 @@ func (cl *Client) Equals(o *Client) bool {
 		o.AfterDiff(bssO)
 	}()
 
-	return utils.JsonEquals(cl, o)
+	return utils.JSONEquals(cl, o)
 }
 
-// Add ac client
+// Add ac client.
 func (clients *Clients) Add(cl Client) {
 	if clients.Clients == nil {
 		clients.Clients = &ClientsArray{cl}
@@ -215,8 +212,8 @@ func (clients *Clients) Add(cl Client) {
 	}
 }
 
-// Merge merge Clients
-func (clients *Clients) Merge(other *Clients) ([]*Client, []*Client, []*Client) {
+// Merge merge Clients.
+func (clients *Clients) Merge(other *Clients) (adds, removes, updates []*Client) {
 	current := make(map[string]*Client)
 	if clients.Clients != nil {
 		cc := *clients.Clients
@@ -233,10 +230,6 @@ func (clients *Clients) Merge(other *Clients) ([]*Client, []*Client, []*Client)
 		}
 	}
 
-	var adds []*Client
-	var removes []*Client
-	var updates []*Client
-
 	for _, cl := range expected {
 		if oc, ok := current[*cl.Name]; ok {
 			if !cl.Equals(oc) {
@@ -255,7 +248,7 @@ func (clients *Clients) Merge(other *Clients) ([]*Client, []*Client, []*Client)
 	return adds, updates, removes
 }
 
-// Key RewriteEntry key
+// Key RewriteEntry key.
 func (re *RewriteEntry) Key() string {
 	var d string
 	var a string
@@ -268,16 +261,13 @@ func (re *RewriteEntry) Key() string {
 	return fmt.Sprintf("%s#%s", d, a)
 }
 
-// RewriteEntries list of RewriteEntry
+// RewriteEntries list of RewriteEntry.
 type RewriteEntries []RewriteEntry
 
-// Merge RewriteEntries
-func (rwe *RewriteEntries) Merge(other *RewriteEntries) (RewriteEntries, RewriteEntries, RewriteEntries) {
+// Merge RewriteEntries.
+func (rwe *RewriteEntries) Merge(other *RewriteEntries) (adds, removes, duplicates RewriteEntries) {
 	current := make(map[string]RewriteEntry)
 
-	var adds RewriteEntries
-	var removes RewriteEntries
-	var duplicates RewriteEntries
 	processed := make(map[string]bool)
 	for _, rr := range *rwe {
 		if _, ok := processed[rr.Key()]; !ok {
@@ -310,16 +300,13 @@ func (rwe *RewriteEntries) Merge(other *RewriteEntries) (RewriteEntries, Rewrite
 	return adds, removes, duplicates
 }
 
-func MergeFilters(this *[]Filter, other *[]Filter) ([]Filter, []Filter, []Filter) {
+func MergeFilters(this, other *[]Filter) (adds, updates, removes []Filter) {
 	if this == nil && other == nil {
 		return nil, nil, nil
 	}
 
 	current := make(map[string]*Filter)
 
-	var adds []Filter
-	var updates []Filter
-	var removes []Filter
 	if this != nil {
 		for _, fi := range *this {
 			current[fi.Url] = &fi
@@ -346,7 +333,7 @@ func MergeFilters(this *[]Filter, other *[]Filter) ([]Filter, []Filter, []Filter
 	return adds, updates, removes
 }
 
-// Equals Filter equal check
+// Equals Filter equal check.
 func (f *Filter) Equals(o *Filter) bool {
 	return f.Enabled == o.Enabled && f.Url == o.Url && f.Name == o.Name
 }
@@ -358,17 +345,17 @@ type QueryLogConfigWithIgnored struct {
 	Ignored []string `json:"ignored,omitempty"`
 }
 
-// Equals QueryLogConfig equal check
+// Equals QueryLogConfig equal check.
 func (qlc *QueryLogConfigWithIgnored) Equals(o *QueryLogConfigWithIgnored) bool {
-	return utils.JsonEquals(qlc, o)
+	return utils.JSONEquals(qlc, o)
 }
 
-// Equals QueryLogConfigInterval equal check
+// Equals QueryLogConfigInterval equal check.
 func (qlc *QueryLogConfigInterval) Equals(o *QueryLogConfigInterval) bool {
 	return ptrEquals(qlc, o)
 }
 
-func ptrEquals[T comparable](a *T, b *T) bool {
+func ptrEquals[T comparable](a, b *T) bool {
 	if a == nil && b == nil {
 		return true
 	}
@@ -384,7 +371,7 @@ func ptrEquals[T comparable](a *T, b *T) bool {
 	return aa == bb
 }
 
-// EnableConfig API struct
+// EnableConfig API struct.
 type EnableConfig struct {
 	Enabled bool `json:"enabled"`
 }
@@ -421,7 +408,7 @@ func (pi *ProfileInfo) ShouldSyncFor(o *ProfileInfo, withTheme bool) *ProfileInf
 }
 
 func (bss *BlockedServicesSchedule) Equals(o *BlockedServicesSchedule) bool {
-	return utils.JsonEquals(bss, o)
+	return utils.JSONEquals(bss, o)
 }
 
 func (bss *BlockedServicesSchedule) ServicesString() string {
@@ -449,9 +436,9 @@ func (c *DNSConfig) Sanitize(l *zap.SugaredLogger) {
 	}
 }
 
-// Equals GetStatsConfigResponse equal check
+// Equals GetStatsConfigResponse equal check.
 func (sc *GetStatsConfigResponse) Equals(o *GetStatsConfigResponse) bool {
-	return utils.JsonEquals(sc, o)
+	return utils.JSONEquals(sc, o)
 }
 
 func NewStats() *Stats {
@@ -482,19 +469,19 @@ func (s *Stats) Add(other *Stats) {
 	s.ReplacedSafebrowsing = sumUp(s.ReplacedSafebrowsing, other.ReplacedSafebrowsing)
 }
 
-func addInt(t *int, add *int) *int {
+func addInt(t, add *int) *int {
 	if add != nil {
 		return ptr.To(*t + *add)
 	}
 	return t
 }
 
-func sumUp(t *[]int, o *[]int) *[]int {
+func sumUp(t, o *[]int) *[]int {
 	if o != nil {
 		tt := *t
 		oo := *o
 		var sum []int
-		for i := 0; i < len(tt); i++ {
+		for i := range tt {
 			if len(oo) >= i {
 				sum = append(sum, tt[i]+oo[i])
 			}

pkg/client/model/model_private_test.go

@@ -1,11 +1,12 @@
 package model
 
 import (
-	"github.com/bakito/adguardhome-sync/pkg/log"
-	"github.com/bakito/adguardhome-sync/pkg/utils"
 	. "github.com/onsi/ginkgo/v2"
 	"github.com/onsi/gomega"
 	"go.uber.org/zap"
+
+	"github.com/bakito/adguardhome-sync/pkg/log"
+	"github.com/bakito/adguardhome-sync/pkg/utils"
 )
 
 var _ = Describe("Types", func() {

pkg/client/model/model_test.go

@@ -4,12 +4,13 @@ import (
 	"encoding/json"
 	"os"
 
-	"github.com/bakito/adguardhome-sync/pkg/client/model"
-	"github.com/bakito/adguardhome-sync/pkg/types"
-	"github.com/bakito/adguardhome-sync/pkg/utils"
 	"github.com/google/uuid"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
+
+	"github.com/bakito/adguardhome-sync/pkg/client/model"
+	"github.com/bakito/adguardhome-sync/pkg/types"
+	"github.com/bakito/adguardhome-sync/pkg/utils"
 )
 
 var _ = Describe("Types", func() {

pkg/config/config.go

@@ -4,9 +4,10 @@ import (
 	"errors"
 	"regexp"
 
+	"github.com/caarlos0/env/v11"
+
 	"github.com/bakito/adguardhome-sync/pkg/log"
 	"github.com/bakito/adguardhome-sync/pkg/types"
-	"github.com/caarlos0/env/v11"
 )
 
 var (
@@ -38,7 +39,7 @@ func Get(configFile string, flags Flags) (*AppConfig, error) {
 		return nil, err
 	}
 
-	if err = validateSchema(path); err != nil {
+	if err := validateSchema(path); err != nil {
 		return nil, err
 	}
 
@@ -67,10 +68,10 @@ func Get(configFile string, flags Flags) (*AppConfig, error) {
 	cfg.Replicas = nil
 
 	// overwrite from env vars
-	if err = env.Parse(cfg); err != nil {
+	if err := env.Parse(cfg); err != nil {
 		return nil, err
 	}
-	if err = env.ParseWithOptions(cfg.Replica, env.Options{Prefix: "REPLICA_"}); err != nil {
+	if err := env.ParseWithOptions(cfg.Replica, env.Options{Prefix: "REPLICA_"}); err != nil {
 		return nil, err
 	}
 	// restore the replica
@@ -81,7 +82,7 @@ func Get(configFile string, flags Flags) (*AppConfig, error) {
 		cfg.Replica.DHCPServerEnabled = replicaDhcpServer
 	}
 
-	if err = env.ParseWithOptions(&cfg.Origin, env.Options{Prefix: "ORIGIN_"}); err != nil {
+	if err := env.ParseWithOptions(&cfg.Origin, env.Options{Prefix: "ORIGIN_"}); err != nil {
 		return nil, err
 	}
 

pkg/config/config_test.go

@@ -3,11 +3,12 @@ package config_test
 import (
 	"os"
 
-	"github.com/bakito/adguardhome-sync/pkg/config"
-	flagsmock "github.com/bakito/adguardhome-sync/pkg/mocks/flags"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 	gm "go.uber.org/mock/gomock"
+
+	"github.com/bakito/adguardhome-sync/pkg/config"
+	flagsmock "github.com/bakito/adguardhome-sync/pkg/mocks/flags"
 )
 
 var _ = Describe("Config", func() {
@@ -16,7 +17,7 @@ var _ = Describe("Config", func() {
 			flags          *flagsmock.MockFlags
 			mockCtrl       *gm.Controller
 			changedEnvVars []string
-			setEnv         = func(name string, value string) {
+			setEnv         = func(name, value string) {
 				_ = os.Setenv(name, value)
 				changedEnvVars = append(changedEnvVars, name)
 			}
@@ -125,9 +126,9 @@ var _ = Describe("Config", func() {
 					Ω(cfg.Get().API.Port).Should(Equal(9090))
 				})
 				It("should have the api port from the config flags", func() {
-					flags.EXPECT().Changed(config.FlagApiPort).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagAPIPort).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetInt(config.FlagApiPort).Return(9990, nil).AnyTimes()
+					flags.EXPECT().GetInt(config.FlagAPIPort).Return(9990, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())
@@ -135,9 +136,9 @@ var _ = Describe("Config", func() {
 				})
 				It("should have the api port from the config env var", func() {
 					setEnv("API_PORT", "9999")
-					flags.EXPECT().Changed(config.FlagApiPort).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagAPIPort).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetInt(config.FlagApiPort).Return(9990, nil).AnyTimes()
+					flags.EXPECT().GetInt(config.FlagAPIPort).Return(9990, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())
@@ -174,9 +175,9 @@ var _ = Describe("Config", func() {
 					Ω(cfg.Get().API.Port).Should(Equal(9090))
 				})
 				It("should have the api port from the config flags", func() {
-					flags.EXPECT().Changed(config.FlagApiPort).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagAPIPort).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetInt(config.FlagApiPort).Return(9990, nil).AnyTimes()
+					flags.EXPECT().GetInt(config.FlagAPIPort).Return(9990, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())
@@ -184,9 +185,9 @@ var _ = Describe("Config", func() {
 				})
 				It("should have the api port from the config env var", func() {
 					setEnv("API_PORT", "9999")
-					flags.EXPECT().Changed(config.FlagApiPort).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagAPIPort).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetInt(config.FlagApiPort).Return(9990, nil).AnyTimes()
+					flags.EXPECT().GetInt(config.FlagAPIPort).Return(9990, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())
@@ -202,9 +203,9 @@ var _ = Describe("Config", func() {
 					Ω(cfg.Get().Features.DNS.ServerConfig).Should(BeFalse())
 				})
 				It("should have the feature dns server config from the config flags", func() {
-					flags.EXPECT().Changed(config.FlagFeatureDnsServerConfig).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagFeatureDNSServerConfig).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetBool(config.FlagFeatureDnsServerConfig).Return(true, nil).AnyTimes()
+					flags.EXPECT().GetBool(config.FlagFeatureDNSServerConfig).Return(true, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())
@@ -212,9 +213,9 @@ var _ = Describe("Config", func() {
 				})
 				It("should have the feature dns server config from the config env var", func() {
 					setEnv("FEATURES_DNS_SERVER_CONFIG", "false")
-					flags.EXPECT().Changed(config.FlagFeatureDnsServerConfig).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagFeatureDNSServerConfig).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetBool(config.FlagFeatureDnsServerConfig).Return(true, nil).AnyTimes()
+					flags.EXPECT().GetBool(config.FlagFeatureDNSServerConfig).Return(true, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())
@@ -222,9 +223,9 @@ var _ = Describe("Config", func() {
 				})
 				It("should have the feature dns server config from the config DEPRECATED env var", func() {
 					setEnv("FEATURES_DNS_SERVERCONFIG", "false")
-					flags.EXPECT().Changed(config.FlagFeatureDnsServerConfig).Return(true).AnyTimes()
+					flags.EXPECT().Changed(config.FlagFeatureDNSServerConfig).Return(true).AnyTimes()
 					flags.EXPECT().Changed(gm.Any()).Return(false).AnyTimes()
-					flags.EXPECT().GetBool(config.FlagFeatureDnsServerConfig).Return(true, nil).AnyTimes()
+					flags.EXPECT().GetBool(config.FlagFeatureDNSServerConfig).Return(true, nil).AnyTimes()
 
 					cfg, err := config.Get("../../testdata/config_test_replicas.yaml", flags)
 					Ω(err).ShouldNot(HaveOccurred())

pkg/config/deprecated_env_test.go

@@ -4,9 +4,10 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/bakito/adguardhome-sync/pkg/config"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
+
+	"github.com/bakito/adguardhome-sync/pkg/config"
 )
 
 var envVars = []string{

pkg/config/env.go

@@ -6,9 +6,10 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/caarlos0/env/v11"
+
 	"github.com/bakito/adguardhome-sync/pkg/types"
 	"github.com/bakito/adguardhome-sync/pkg/utils"
-	"github.com/caarlos0/env/v11"
 )
 
 func handleDeprecatedEnvVars(cfg *types.Config) {
@@ -61,20 +62,20 @@ func handleDeprecatedEnvVars(cfg *types.Config) {
 	}
 }
 
-func checkDeprecatedEnvVar(oldName string, newName string) (string, bool) {
+func checkDeprecatedEnvVar(oldName, newName string) (string, bool) {
 	old, oldOK := os.LookupEnv(oldName)
 	if oldOK {
 		logger.With("deprecated", oldName, "replacement", newName).
 			Warn("Deprecated env variable is used, please use the correct one")
 	}
-	new, newOK := os.LookupEnv(newName)
+	newVal, newOK := os.LookupEnv(newName)
 	if newOK {
-		return new, true
+		return newVal, true
 	}
 	return old, oldOK
 }
 
-func checkDeprecatedReplicaEnvVar(oldPattern string, newPattern string, replicaID int) (string, bool) {
+func checkDeprecatedReplicaEnvVar(oldPattern, newPattern string, replicaID int) (string, bool) {
 	return checkDeprecatedEnvVar(fmt.Sprintf(oldPattern, replicaID), fmt.Sprintf(newPattern, replicaID))
 }
 

pkg/config/file.go

@@ -4,8 +4,9 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/bakito/adguardhome-sync/pkg/types"
 	"gopkg.in/yaml.v3"
+
+	"github.com/bakito/adguardhome-sync/pkg/types"
 )
 
 func readFile(cfg *types.Config, path string) (string, error) {

pkg/config/file_test.go

@@ -10,9 +10,6 @@ import (
 )
 
 var _ = Describe("Config", func() {
-	var ()
-	BeforeEach(func() {
-	})
 	Context("configFilePath", func() {
 		It("should return the same value", func() {
 			path := uuid.NewString()
@@ -26,7 +23,7 @@ var _ = Describe("Config", func() {
 			result, err := configFilePath("")
 
 			Ω(err).ShouldNot(HaveOccurred())
-			Ω(result).Should(Equal(filepath.Join(home, "/.adguardhome-sync.yaml")))
+			Ω(result).Should(Equal(filepath.Join(home, ".adguardhome-sync.yaml")))
 		})
 	})
 })

pkg/config/flag-names.go

@@ -6,16 +6,16 @@ const (
 	FlagPrintConfigOnly = "printConfigOnly"
 	FlagContinueOnError = "continueOnError"
 
-	FlagApiPort     = "api-port"
-	FlagApiUsername = "api-username"
-	FlagApiPassword = "api-password"
-	FlagApiDarkMode = "api-dark-mode"
+	FlagAPIPort     = "api-port"
+	FlagAPIUsername = "api-username"
+	FlagAPIPassword = "api-password"
+	FlagAPIDarkMode = "api-dark-mode"
 
 	FlagFeatureDhcpServerConfig = "feature-dhcp-server-config"
 	FlagFeatureDhcpStaticLeases = "feature-dhcp-static-leases"
-	FlagFeatureDnsServerConfig  = "feature-dns-server-config"
-	FlagFeatureDnsAccessLists   = "feature-dns-access-lists"
-	FlagFeatureDnsRewrites      = "feature-dns-rewrites"
+	FlagFeatureDNSServerConfig  = "feature-dns-server-config"
+	FlagFeatureDNSAccessLists   = "feature-dns-access-lists"
+	FlagFeatureDNSRewrites      = "feature-dns-rewrites"
 	FlagFeatureGeneral          = "feature-general-settings"
 	FlagFeatureQueryLog         = "feature-query-log-config"
 	FlagFeatureStats            = "feature-stats-config"
@@ -25,7 +25,7 @@ const (
 
 	FlagOriginURL      = "origin-url"
 	FlagOriginWebURL   = "origin-web-url"
-	FlagOriginApiPath  = "origin-api-path"
+	FlagOriginAPIPath  = "origin-api-path"
 	FlagOriginUsername = "origin-username"
 
 	FlagOriginPassword = "origin-password"
@@ -34,7 +34,7 @@ const (
 
 	FlagReplicaURL           = "replica-url"
 	FlagReplicaWebURL        = "replica-web-url"
-	FlagReplicaApiPath       = "replica-api-path"
+	FlagReplicaAPIPath       = "replica-api-path"
 	FlagReplicaUsername      = "replica-username"
 	FlagReplicaPassword      = "replica-password"
 	FlagReplicaCookie        = "replica-cookie"

pkg/config/flags.go

@@ -18,7 +18,7 @@ func readFlags(cfg *types.Config, flags Flags) error {
 		return err
 	}
 
-	if err := fr.readApiFlags(); err != nil {
+	if err := fr.readAPIFlags(); err != nil {
 		return err
 	}
 
@@ -30,11 +30,7 @@ func readFlags(cfg *types.Config, flags Flags) error {
 		return err
 	}
 
-	if err := fr.readReplicaFlags(); err != nil {
-		return err
-	}
-
-	return nil
+	return fr.readReplicaFlags()
 }
 
 type flagReader struct {
@@ -53,7 +49,7 @@ func (fr *flagReader) readReplicaFlags() error {
 	}); err != nil {
 		return err
 	}
-	if err := fr.setStringFlag(FlagReplicaApiPath, func(cgf *types.Config, value string) {
+	if err := fr.setStringFlag(FlagReplicaAPIPath, func(cgf *types.Config, value string) {
 		fr.cfg.Replica.APIPath = value
 	}); err != nil {
 		return err
@@ -83,12 +79,9 @@ func (fr *flagReader) readReplicaFlags() error {
 	}); err != nil {
 		return err
 	}
-	if err := fr.setStringFlag(FlagReplicaInterfaceName, func(cgf *types.Config, value string) {
+	return fr.setStringFlag(FlagReplicaInterfaceName, func(cgf *types.Config, value string) {
 		fr.cfg.Replica.InterfaceName = value
-	}); err != nil {
-		return err
-	}
-	return nil
+	})
 }
 
 func (fr *flagReader) readOriginFlags() error {
@@ -102,7 +95,7 @@ func (fr *flagReader) readOriginFlags() error {
 	}); err != nil {
 		return err
 	}
-	if err := fr.setStringFlag(FlagOriginApiPath, func(cgf *types.Config, value string) {
+	if err := fr.setStringFlag(FlagOriginAPIPath, func(cgf *types.Config, value string) {
 		fr.cfg.Origin.APIPath = value
 	}); err != nil {
 		return err
@@ -122,12 +115,9 @@ func (fr *flagReader) readOriginFlags() error {
 	}); err != nil {
 		return err
 	}
-	if err := fr.setBoolFlag(FlagOriginISV, func(cgf *types.Config, value bool) {
+	return fr.setBoolFlag(FlagOriginISV, func(cgf *types.Config, value bool) {
 		fr.cfg.Origin.InsecureSkipVerify = value
-	}); err != nil {
-		return err
-	}
-	return nil
+	})
 }
 
 func (fr *flagReader) readFeatureFlags() error {
@@ -142,17 +132,17 @@ func (fr *flagReader) readFeatureFlags() error {
 		return err
 	}
 
-	if err := fr.setBoolFlag(FlagFeatureDnsServerConfig, func(cgf *types.Config, value bool) {
+	if err := fr.setBoolFlag(FlagFeatureDNSServerConfig, func(cgf *types.Config, value bool) {
 		fr.cfg.Features.DNS.ServerConfig = value
 	}); err != nil {
 		return err
 	}
-	if err := fr.setBoolFlag(FlagFeatureDnsAccessLists, func(cgf *types.Config, value bool) {
+	if err := fr.setBoolFlag(FlagFeatureDNSAccessLists, func(cgf *types.Config, value bool) {
 		fr.cfg.Features.DNS.AccessLists = value
 	}); err != nil {
 		return err
 	}
-	if err := fr.setBoolFlag(FlagFeatureDnsRewrites, func(cgf *types.Config, value bool) {
+	if err := fr.setBoolFlag(FlagFeatureDNSRewrites, func(cgf *types.Config, value bool) {
 		fr.cfg.Features.DNS.Rewrites = value
 	}); err != nil {
 		return err
@@ -183,61 +173,51 @@ func (fr *flagReader) readFeatureFlags() error {
 	}); err != nil {
 		return err
 	}
-	if err := fr.setBoolFlag(FlagFeatureFilters, func(cgf *types.Config, value bool) {
+	return fr.setBoolFlag(FlagFeatureFilters, func(cgf *types.Config, value bool) {
 		fr.cfg.Features.Filters = value
+	})
+}
+
+func (fr *flagReader) readAPIFlags() error {
+	if err := fr.setIntFlag(FlagAPIPort, func(cgf *types.Config, value int) {
+		fr.cfg.API.Port = value
 	}); err != nil {
 		return err
 	}
-
-	return nil
-}
-
-func (fr *flagReader) readApiFlags() (err error) {
-	if err = fr.setIntFlag(FlagApiPort, func(cgf *types.Config, value int) {
-		fr.cfg.API.Port = value
-	}); err != nil {
-		return
-	}
-	if err = fr.setStringFlag(FlagApiUsername, func(cgf *types.Config, value string) {
+	if err := fr.setStringFlag(FlagAPIUsername, func(cgf *types.Config, value string) {
 		fr.cfg.API.Username = value
 	}); err != nil {
-		return
+		return err
 	}
-	if err = fr.setStringFlag(FlagApiPassword, func(cgf *types.Config, value string) {
+	if err := fr.setStringFlag(FlagAPIPassword, func(cgf *types.Config, value string) {
 		fr.cfg.API.Password = value
 	}); err != nil {
-		return
+		return err
 	}
-	if err = fr.setBoolFlag(FlagApiDarkMode, func(cgf *types.Config, value bool) {
+	return fr.setBoolFlag(FlagAPIDarkMode, func(cgf *types.Config, value bool) {
 		fr.cfg.API.DarkMode = value
-	}); err != nil {
-		return
-	}
-	return
+	})
 }
 
-func (fr *flagReader) readRootFlags() (err error) {
-	if err = fr.setStringFlag(FlagCron, func(cgf *types.Config, value string) {
+func (fr *flagReader) readRootFlags() error {
+	if err := fr.setStringFlag(FlagCron, func(cgf *types.Config, value string) {
 		fr.cfg.Cron = value
 	}); err != nil {
-		return
+		return err
 	}
-	if err = fr.setBoolFlag(FlagRunOnStart, func(cgf *types.Config, value bool) {
+	if err := fr.setBoolFlag(FlagRunOnStart, func(cgf *types.Config, value bool) {
 		fr.cfg.RunOnStart = value
 	}); err != nil {
-		return
+		return err
 	}
-	if err = fr.setBoolFlag(FlagPrintConfigOnly, func(cgf *types.Config, value bool) {
+	if err := fr.setBoolFlag(FlagPrintConfigOnly, func(cgf *types.Config, value bool) {
 		fr.cfg.PrintConfigOnly = value
 	}); err != nil {
-		return
+		return err
 	}
-	if err = fr.setBoolFlag(FlagContinueOnError, func(cgf *types.Config, value bool) {
+	return fr.setBoolFlag(FlagContinueOnError, func(cgf *types.Config, value bool) {
 		fr.cfg.ContinueOnError = value
-	}); err != nil {
-		return
-	}
-	return
+	})
 }
 
 type Flags interface {
@@ -249,33 +229,33 @@ type Flags interface {
 
 func (fr *flagReader) setStringFlag(name string, cb callback[string]) (err error) {
 	if fr.flags.Changed(name) {
-		if value, err := fr.flags.GetString(name); err != nil {
+		var value string
+		if value, err = fr.flags.GetString(name); err != nil {
 			return err
-		} else {
-			cb(fr.cfg, value)
 		}
+		cb(fr.cfg, value)
 	}
 	return nil
 }
 
 func (fr *flagReader) setBoolFlag(name string, cb callback[bool]) (err error) {
 	if fr.flags.Changed(name) {
-		if value, err := fr.flags.GetBool(name); err != nil {
+		var value bool
+		if value, err = fr.flags.GetBool(name); err != nil {
 			return err
-		} else {
-			cb(fr.cfg, value)
 		}
+		cb(fr.cfg, value)
 	}
 	return nil
 }
 
 func (fr *flagReader) setIntFlag(name string, cb callback[int]) (err error) {
 	if fr.flags.Changed(name) {
-		if value, err := fr.flags.GetInt(name); err != nil {
+		var value int
+		if value, err = fr.flags.GetInt(name); err != nil {
 			return err
-		} else {
-			cb(fr.cfg, value)
 		}
+		cb(fr.cfg, value)
 	}
 	return nil
 }

pkg/config/flags_test.go

@@ -3,11 +3,12 @@ package config
 import (
 	"strings"
 
-	flagsmock "github.com/bakito/adguardhome-sync/pkg/mocks/flags"
-	"github.com/bakito/adguardhome-sync/pkg/types"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 	gm "go.uber.org/mock/gomock"
+
+	flagsmock "github.com/bakito/adguardhome-sync/pkg/mocks/flags"
+	"github.com/bakito/adguardhome-sync/pkg/types"
 )
 
 var _ = Describe("Config", func() {
@@ -88,7 +89,7 @@ var _ = Describe("Config", func() {
 			}))
 		})
 	})
-	Context("readApiFlags", func() {
+	Context("readAPIFlags", func() {
 		It("should change all values", func() {
 			cfg.API = types.API{
 				Port:     1111,
@@ -99,10 +100,10 @@ var _ = Describe("Config", func() {
 			flags.EXPECT().Changed(gm.Any()).DoAndReturn(func(name string) bool {
 				return strings.HasPrefix(name, "api")
 			}).AnyTimes()
-			flags.EXPECT().GetInt(FlagApiPort).Return(9999, nil)
-			flags.EXPECT().GetString(FlagApiUsername).Return("aaaa", nil)
-			flags.EXPECT().GetString(FlagApiPassword).Return("bbbb", nil)
-			flags.EXPECT().GetBool(FlagApiDarkMode).Return(true, nil)
+			flags.EXPECT().GetInt(FlagAPIPort).Return(9999, nil)
+			flags.EXPECT().GetString(FlagAPIUsername).Return("aaaa", nil)
+			flags.EXPECT().GetString(FlagAPIPassword).Return("bbbb", nil)
+			flags.EXPECT().GetBool(FlagAPIDarkMode).Return(true, nil)
 			err := readFlags(cfg, flags)
 
 			Ω(err).ShouldNot(HaveOccurred())
@@ -154,7 +155,7 @@ var _ = Describe("Config", func() {
 
 			flags.EXPECT().Changed(FlagOriginURL).Return(true)
 			flags.EXPECT().Changed(FlagOriginWebURL).Return(true)
-			flags.EXPECT().Changed(FlagOriginApiPath).Return(true)
+			flags.EXPECT().Changed(FlagOriginAPIPath).Return(true)
 			flags.EXPECT().Changed(FlagOriginUsername).Return(true)
 			flags.EXPECT().Changed(FlagOriginPassword).Return(true)
 			flags.EXPECT().Changed(FlagOriginCookie).Return(true)
@@ -163,7 +164,7 @@ var _ = Describe("Config", func() {
 
 			flags.EXPECT().GetString(FlagOriginURL).Return("a", nil)
 			flags.EXPECT().GetString(FlagOriginWebURL).Return("b", nil)
-			flags.EXPECT().GetString(FlagOriginApiPath).Return("c", nil)
+			flags.EXPECT().GetString(FlagOriginAPIPath).Return("c", nil)
 			flags.EXPECT().GetString(FlagOriginUsername).Return("d", nil)
 			flags.EXPECT().GetString(FlagOriginPassword).Return("e", nil)
 			flags.EXPECT().GetString(FlagOriginCookie).Return("f", nil)
@@ -198,7 +199,7 @@ var _ = Describe("Config", func() {
 
 			flags.EXPECT().Changed(FlagReplicaURL).Return(true)
 			flags.EXPECT().Changed(FlagReplicaWebURL).Return(true)
-			flags.EXPECT().Changed(FlagReplicaApiPath).Return(true)
+			flags.EXPECT().Changed(FlagReplicaAPIPath).Return(true)
 			flags.EXPECT().Changed(FlagReplicaUsername).Return(true)
 			flags.EXPECT().Changed(FlagReplicaPassword).Return(true)
 			flags.EXPECT().Changed(FlagReplicaCookie).Return(true)
@@ -209,7 +210,7 @@ var _ = Describe("Config", func() {
 
 			flags.EXPECT().GetString(FlagReplicaURL).Return("a", nil)
 			flags.EXPECT().GetString(FlagReplicaWebURL).Return("b", nil)
-			flags.EXPECT().GetString(FlagReplicaApiPath).Return("c", nil)
+			flags.EXPECT().GetString(FlagReplicaAPIPath).Return("c", nil)
 			flags.EXPECT().GetString(FlagReplicaUsername).Return("d", nil)
 			flags.EXPECT().GetString(FlagReplicaPassword).Return("e", nil)
 			flags.EXPECT().GetString(FlagReplicaCookie).Return("f", nil)

pkg/config/print-config.go

@@ -9,10 +9,11 @@ import (
 	"strings"
 	"text/template"
 
+	"gopkg.in/yaml.v3"
+
 	"github.com/bakito/adguardhome-sync/pkg/client"
 	"github.com/bakito/adguardhome-sync/pkg/types"
 	"github.com/bakito/adguardhome-sync/version"
-	"gopkg.in/yaml.v3"
 )
 
 //go:embed print-config.md
@@ -25,7 +26,7 @@ func (ac *AppConfig) Print() error {
 		replicaVersions = append(replicaVersions, aghVersion(replica))
 	}
 
-	out, err := ac.print(os.Environ(), originVersion, replicaVersions)
+	out, err := ac.printInternal(os.Environ(), originVersion, replicaVersions)
 	if err != nil {
 		return err
 	}
@@ -50,7 +51,7 @@ func aghVersion(i types.AdGuardInstance) string {
 	return stats.Version
 }
 
-func (ac *AppConfig) print(env []string, originVersion string, replicaVersions []string) (string, error) {
+func (ac *AppConfig) printInternal(env []string, originVersion string, replicaVersions []string) (string, error) {
 	config, err := yaml.Marshal(ac.Get())
 	if err != nil {
 		return "", err
@@ -72,7 +73,7 @@ func (ac *AppConfig) print(env []string, originVersion string, replicaVersions [
 
 	var buf bytes.Buffer
 
-	if err = t.Execute(&buf, map[string]interface{}{
+	err = t.Execute(&buf, map[string]any{
 		"Version":              version.Version,
 		"Build":                version.Build,
 		"OperatingSystem":      runtime.GOOS,
@@ -83,8 +84,6 @@ func (ac *AppConfig) print(env []string, originVersion string, replicaVersions [
 		"EnvironmentVariables": strings.Join(env, "\n"),
 		"OriginVersion":        originVersion,
 		"ReplicaVersions":      replicaVersions,
-	}); err != nil {
-		return "", err
-	}
-	return buf.String(), nil
+	})
+	return buf.String(), err
 }

pkg/config/print-config_test.go

@@ -7,10 +7,11 @@ import (
 	"path/filepath"
 	"runtime"
 
-	"github.com/bakito/adguardhome-sync/pkg/types"
-	"github.com/bakito/adguardhome-sync/version"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
+
+	"github.com/bakito/adguardhome-sync/pkg/types"
+	"github.com/bakito/adguardhome-sync/version"
 )
 
 var _ = Describe("AppConfig", func() {
@@ -32,17 +33,17 @@ origin:
 		}
 		env = []string{"FOO=foo", "BAR=bar"}
 	})
-	Context("print", func() {
-		It("should print config without file", func() {
-			out, err := ac.print(env, "v0.0.1", []string{"v0.0.2"})
+	Context("printInternal", func() {
+		It("should printInternal config without file", func() {
+			out, err := ac.printInternal(env, "v0.0.1", []string{"v0.0.2"})
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(
 				out,
 			).Should(Equal(fmt.Sprintf(expected(1), version.Version, version.Build, runtime.GOOS, runtime.GOARCH)))
 		})
-		It("should print config with file", func() {
+		It("should printInternal config with file", func() {
 			ac.filePath = "config.yaml"
-			out, err := ac.print(env, "v0.0.1", []string{"v0.0.2"})
+			out, err := ac.printInternal(env, "v0.0.1", []string{"v0.0.2"})
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(
 				out,
@@ -52,7 +53,9 @@ origin:
 })
 
 func expected(id int) string {
-	b, err := os.ReadFile(filepath.Join("../../testdata/config", fmt.Sprintf("print-config_test_expected%d.md", id)))
+	b, err := os.ReadFile(
+		filepath.Join("..", "..", "testdata", "config", fmt.Sprintf("print-config_test_expected%d.md", id)),
+	)
 	Ω(err).ShouldNot(HaveOccurred())
 	return string(b)
 }

pkg/config/validate.go

@@ -17,6 +17,7 @@ var schemaData string
 func validateSchema(cfgFile string) error {
 	// ignore if file not exists
 	if _, err := os.Stat(cfgFile); err != nil {
+		//nolint:nilerr
 		return nil
 	}
 	// Load YAML file
@@ -30,7 +31,7 @@ func validateSchema(cfgFile string) error {
 
 func validateYAML(yamlContent []byte) error {
 	// Convert YAML to JSON
-	var yamlData interface{}
+	var yamlData any
 	err := yaml.Unmarshal(yamlContent, &yamlData)
 	if err != nil {
 		return err

pkg/config/validate_test.go

@@ -1,11 +1,12 @@
 package config
 
 import (
-	"github.com/bakito/adguardhome-sync/pkg/types"
 	"github.com/go-faker/faker/v4"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 	"gopkg.in/yaml.v3"
+
+	"github.com/bakito/adguardhome-sync/pkg/types"
 )
 
 var _ = Describe("Config", func() {

pkg/log/log.go

@@ -18,7 +18,7 @@ var (
 	logs       []string
 )
 
-// GetLogger returns a named logger
+// GetLogger returns a named logger.
 func GetLogger(name string) *zap.SugaredLogger {
 	return rootLogger.Named(name).Sugar()
 }
@@ -101,12 +101,12 @@ func (l *logList) Sync() error {
 	return nil
 }
 
-// Logs get the current logs
+// Logs get the current logs.
 func Logs() []string {
 	return logs
 }
 
-// Clear  the current logs
+// Clear  the current logs.
 func Clear() {
 	logs = nil
 }

pkg/metrics/metrics.go

@@ -1,9 +1,10 @@
 package metrics
 
 import (
+	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/log"
-	"github.com/prometheus/client_golang/prometheus"
 )
 
 const StatsTotal = "total"
@@ -11,7 +12,7 @@ const StatsTotal = "total"
 var (
 	l = log.GetLogger("metrics")
 
-	// avgProcessingTime - Average processing time for a DNS query
+	// avgProcessingTime - Average processing time for a DNS query.
 	avgProcessingTime = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "avg_processing_time",
@@ -21,7 +22,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// dnsQueries - Number of DNS queries
+	// dnsQueries - Number of DNS queries.
 	dnsQueries = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "num_dns_queries",
@@ -31,7 +32,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// blockedFiltering - Number of DNS queries blocked
+	// blockedFiltering - Number of DNS queries blocked.
 	blockedFiltering = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "num_blocked_filtering",
@@ -41,7 +42,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// parentalFiltering - Number of DNS queries replaced by parental control
+	// parentalFiltering - Number of DNS queries replaced by parental control.
 	parentalFiltering = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "num_replaced_parental",
@@ -51,7 +52,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// safeBrowsingFiltering - Number of DNS queries replaced by safe browsing
+	// safeBrowsingFiltering - Number of DNS queries replaced by safe browsing.
 	safeBrowsingFiltering = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "num_replaced_safebrowsing",
@@ -61,7 +62,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// safeSearchFiltering - Number of DNS queries replaced by safe search
+	// safeSearchFiltering - Number of DNS queries replaced by safe search.
 	safeSearchFiltering = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "num_replaced_safesearch",
@@ -71,7 +72,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// topQueries - The number of top queries
+	// topQueries - The number of top queries.
 	topQueries = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "top_queried_domains",
@@ -81,7 +82,7 @@ var (
 		[]string{"hostname", "domain"},
 	)
 
-	// topBlocked - The number of top domains blocked
+	// topBlocked - The number of top domains blocked.
 	topBlocked = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "top_blocked_domains",
@@ -91,7 +92,7 @@ var (
 		[]string{"hostname", "domain"},
 	)
 
-	// topClients - The number of top clients
+	// topClients - The number of top clients.
 	topClients = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "top_clients",
@@ -111,7 +112,7 @@ var (
 		[]string{"hostname", "type"},
 	)
 
-	// running - If Adguard is running
+	// running - If Adguard is running.
 	running = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "running",
@@ -121,7 +122,7 @@ var (
 		[]string{"hostname"},
 	)
 
-	// protectionEnabled - If Adguard protection is enabled
+	// protectionEnabled - If Adguard protection is enabled.
 	protectionEnabled = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Name:      "protection_enabled",
@@ -157,22 +158,22 @@ func initMetric(name string, metric *prometheus.GaugeVec) {
 
 func Update(iml InstanceMetricsList) {
 	for _, im := range iml.Metrics {
-		update(im)
+		updateMetrics(im)
 		stats[im.HostName] = im.Stats
 	}
 
 	l.Debug("updated")
 }
 
-func update(im InstanceMetrics) {
+func updateMetrics(im InstanceMetrics) {
 	// Status
-	var isRunning int = 0
+	isRunning := 0
 	if im.Status.Running {
 		isRunning = 1
 	}
 	running.WithLabelValues(im.HostName).Set(float64(isRunning))
 
-	var isProtected int = 0
+	isProtected := 0
 	if im.Status.ProtectionEnabled {
 		isProtected = 1
 	}
@@ -218,7 +219,7 @@ func update(im InstanceMetrics) {
 				if len(dnsanswer) > 0 {
 					for _, dnsa := range dnsanswer {
 						dnsType := *dnsa.Type
-						m[dnsType] += 1
+						m[dnsType]++
 					}
 				}
 			}

pkg/metrics/metrics_test.go

@@ -1,11 +1,12 @@
 package metrics
 
 import (
-	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/go-faker/faker/v4"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 	"k8s.io/utils/ptr"
+
+	"github.com/bakito/adguardhome-sync/pkg/client/model"
 )
 
 var _ = Describe("Metrics", func() {
@@ -85,15 +86,15 @@ var _ = Describe("Metrics", func() {
 	})
 })
 
-func verifyStats(lines []line) {
-	var total line
+func verifyStats(lines []Line) {
+	var total Line
 	sum := make([]int, len(lines[0].Data))
 	for _, l := range lines {
 		if l.Title == labelTotal {
 			total = l
 		} else {
 			for i, d := range l.Data {
-				sum[i] = sum[i] + d
+				sum[i] += d
 			}
 		}
 	}

pkg/metrics/stats.go

@@ -47,19 +47,19 @@ var (
 	}
 )
 
-func StatsGraph() (*model.Stats, []line, []line, []line, []line) {
+func StatsGraph() (t *model.Stats, dns, blocked, malware, adult []Line) {
 	s := getStats()
-	t := s.Total()
-	dns := graphLines(t, s, blue, blueAlternatives, func(s *model.Stats) []int {
+	t = s.Total()
+	dns = graphLines(t, s, blue, blueAlternatives, func(s *model.Stats) []int {
 		return safeStats(s.DnsQueries)
 	})
-	blocked := graphLines(t, s, red, redAlternatives, func(s *model.Stats) []int {
+	blocked = graphLines(t, s, red, redAlternatives, func(s *model.Stats) []int {
 		return safeStats(s.BlockedFiltering)
 	})
-	malware := graphLines(t, s, green, greenAlternatives, func(s *model.Stats) []int {
+	malware = graphLines(t, s, green, greenAlternatives, func(s *model.Stats) []int {
 		return safeStats(s.ReplacedSafebrowsing)
 	})
-	adult := graphLines(t, s, yellow, yellowAlternatives, func(s *model.Stats) []int {
+	adult = graphLines(t, s, yellow, yellowAlternatives, func(s *model.Stats) []int {
 		return safeStats(s.ReplacedParental)
 	})
 
@@ -79,9 +79,9 @@ func graphLines(
 	baseColor []int,
 	altColors [][]int,
 	dataCB func(s *model.Stats) []int,
-) []line {
+) []Line {
 	g := &graph{
-		total: line{
+		total: Line{
 			Fill:  true,
 			Title: labelTotal,
 			Data:  dataCB(t),
@@ -94,7 +94,7 @@ func graphLines(
 	var i int
 	for name, data := range s {
 		if name != StatsTotal {
-			g.replicas = append(g.replicas, line{
+			g.replicas = append(g.replicas, Line{
 				Fill:  false,
 				Title: name,
 				Data:  dataCB(data),
@@ -106,9 +106,9 @@ func graphLines(
 		}
 	}
 
-	lines := []line{g.total}
+	lines := []Line{g.total}
 
-	slices.SortFunc(g.replicas, func(a, b line) int {
+	slices.SortFunc(g.replicas, func(a, b Line) int {
 		return strings.Compare(a.Title, b.Title)
 	})
 	lines = append(lines, g.replicas...)
@@ -116,11 +116,11 @@ func graphLines(
 }
 
 type graph struct {
-	total    line
-	replicas []line
+	total    Line
+	replicas []Line
 }
 
-type line struct {
+type Line struct {
 	Data  []int  `json:"data"`
 	R     int    `json:"r"`
 	G     int    `json:"g"`

pkg/mocks/client/mock.go

@@ -384,17 +384,17 @@ func (mr *MockClientMockRecorder) SafeSearchConfig() *gomock.Call {
 }
 
 // SetAccessList mocks base method.
-func (m *MockClient) SetAccessList(arg0 *model.AccessList) error {
+func (m *MockClient) SetAccessList(accessList *model.AccessList) error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "SetAccessList", arg0)
+	ret := m.ctrl.Call(m, "SetAccessList", accessList)
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
 // SetAccessList indicates an expected call of SetAccessList.
-func (mr *MockClientMockRecorder) SetAccessList(arg0 any) *gomock.Call {
+func (mr *MockClientMockRecorder) SetAccessList(accessList any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetAccessList", reflect.TypeOf((*MockClient)(nil).SetAccessList), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetAccessList", reflect.TypeOf((*MockClient)(nil).SetAccessList), accessList)
 }
 
 // SetBlockedServicesSchedule mocks base method.
@@ -426,31 +426,31 @@ func (mr *MockClientMockRecorder) SetCustomRules(rules any) *gomock.Call {
 }
 
 // SetDNSConfig mocks base method.
-func (m *MockClient) SetDNSConfig(arg0 *model.DNSConfig) error {
+func (m *MockClient) SetDNSConfig(config *model.DNSConfig) error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "SetDNSConfig", arg0)
+	ret := m.ctrl.Call(m, "SetDNSConfig", config)
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
 // SetDNSConfig indicates an expected call of SetDNSConfig.
-func (mr *MockClientMockRecorder) SetDNSConfig(arg0 any) *gomock.Call {
+func (mr *MockClientMockRecorder) SetDNSConfig(config any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetDNSConfig", reflect.TypeOf((*MockClient)(nil).SetDNSConfig), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetDNSConfig", reflect.TypeOf((*MockClient)(nil).SetDNSConfig), config)
 }
 
 // SetDhcpConfig mocks base method.
-func (m *MockClient) SetDhcpConfig(arg0 *model.DhcpStatus) error {
+func (m *MockClient) SetDhcpConfig(status *model.DhcpStatus) error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "SetDhcpConfig", arg0)
+	ret := m.ctrl.Call(m, "SetDhcpConfig", status)
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
 // SetDhcpConfig indicates an expected call of SetDhcpConfig.
-func (mr *MockClientMockRecorder) SetDhcpConfig(arg0 any) *gomock.Call {
+func (mr *MockClientMockRecorder) SetDhcpConfig(status any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetDhcpConfig", reflect.TypeOf((*MockClient)(nil).SetDhcpConfig), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetDhcpConfig", reflect.TypeOf((*MockClient)(nil).SetDhcpConfig), status)
 }
 
 // SetProfileInfo mocks base method.
@@ -468,17 +468,17 @@ func (mr *MockClientMockRecorder) SetProfileInfo(settings any) *gomock.Call {
 }
 
 // SetQueryLogConfig mocks base method.
-func (m *MockClient) SetQueryLogConfig(arg0 *model.QueryLogConfigWithIgnored) error {
+func (m *MockClient) SetQueryLogConfig(ql *model.QueryLogConfigWithIgnored) error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "SetQueryLogConfig", arg0)
+	ret := m.ctrl.Call(m, "SetQueryLogConfig", ql)
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
 // SetQueryLogConfig indicates an expected call of SetQueryLogConfig.
-func (mr *MockClientMockRecorder) SetQueryLogConfig(arg0 any) *gomock.Call {
+func (mr *MockClientMockRecorder) SetQueryLogConfig(ql any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetQueryLogConfig", reflect.TypeOf((*MockClient)(nil).SetQueryLogConfig), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetQueryLogConfig", reflect.TypeOf((*MockClient)(nil).SetQueryLogConfig), ql)
 }
 
 // SetSafeSearchConfig mocks base method.

pkg/sync/action-general.go

@@ -1,10 +1,11 @@
 package sync
 
 import (
+	"go.uber.org/zap"
+
 	"github.com/bakito/adguardhome-sync/pkg/client"
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/utils"
-	"go.uber.org/zap"
 )
 
 var (

pkg/sync/action.go

@@ -1,10 +1,11 @@
 package sync
 
 import (
+	"go.uber.org/zap"
+
 	"github.com/bakito/adguardhome-sync/pkg/client"
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/types"
-	"go.uber.org/zap"
 )
 
 func setupActions(cfg *types.Config) (actions []syncAction) {

pkg/sync/http.go

@@ -14,10 +14,11 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/gin-gonic/gin"
+
 	"github.com/bakito/adguardhome-sync/pkg/log"
 	"github.com/bakito/adguardhome-sync/pkg/metrics"
 	"github.com/bakito/adguardhome-sync/version"
-	"github.com/gin-gonic/gin"
 )
 
 var (
@@ -35,13 +36,13 @@ func (w *worker) handleSync(c *gin.Context) {
 func (w *worker) handleRoot(c *gin.Context) {
 	total, dns, blocked, malware, adult := metrics.StatsGraph()
 
-	c.HTML(http.StatusOK, "index.html", map[string]interface{}{
+	c.HTML(http.StatusOK, "index.html", map[string]any{
 		"DarkMode":   w.cfg.API.DarkMode,
 		"Metrics":    w.cfg.API.Metrics.Enabled,
 		"Version":    version.Version,
 		"Build":      version.Build,
 		"SyncStatus": w.status(),
-		"Stats": map[string]interface{}{
+		"Stats": map[string]any{
 			"Labels":  getLast24Hours(),
 			"DNS":     dns,
 			"Blocked": blocked,
@@ -169,8 +170,6 @@ func (w *worker) listenAndServe() {
 
 	// manually cancel context if not using httpServer.RegisterOnShutdown(cancel)
 	cancel()
-
-	defer os.Exit(0)
 }
 
 type syncStatus struct {
@@ -192,7 +191,7 @@ func getLast24Hours() []string {
 	currentTime := time.Now()
 
 	// Loop to get the last 24 hours
-	for i := 0; i < 24; i++ {
+	for i := range 24 {
 		// Calculate the time for the current hour in the loop
 		timeInstance := currentTime.Add(time.Duration(-i) * time.Hour)
 		timeInstance = timeInstance.Truncate(time.Hour)

pkg/sync/scrape.go

@@ -35,16 +35,17 @@ func (w *worker) scrape() {
 	metrics.Update(iml)
 }
 
-func (w *worker) getMetrics(inst types.AdGuardInstance) (im metrics.InstanceMetrics) {
+func (w *worker) getMetrics(inst types.AdGuardInstance) metrics.InstanceMetrics {
+	var im metrics.InstanceMetrics
 	client, err := w.createClient(inst)
 	if err != nil {
 		l.With("error", err, "url", w.cfg.Origin.URL).Error("Error creating origin client")
-		return
+		return im
 	}
 
 	im.HostName = inst.Host
 	im.Status, _ = client.Status()
 	im.Stats, _ = client.Stats()
 	im.QueryLog, _ = client.QueryLog(w.cfg.API.Metrics.QueryLogLimit)
-	return
+	return im
 }

pkg/sync/sync.go

@@ -2,11 +2,13 @@ package sync
 
 import (
 	"errors"
-	"fmt"
 	"runtime"
 	"sort"
 	"time"
 
+	"github.com/robfig/cron/v3"
+	"go.uber.org/zap"
+
 	"github.com/bakito/adguardhome-sync/pkg/client"
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	"github.com/bakito/adguardhome-sync/pkg/log"
@@ -14,20 +16,18 @@ import (
 	"github.com/bakito/adguardhome-sync/pkg/utils"
 	"github.com/bakito/adguardhome-sync/pkg/versions"
 	"github.com/bakito/adguardhome-sync/version"
-	"github.com/robfig/cron/v3"
-	"go.uber.org/zap"
 )
 
 var l = log.GetLogger("sync")
 
-// Sync config from origin to replica
+// Sync config from origin to replica.
 func Sync(cfg *types.Config) error {
 	if cfg.Origin.URL == "" {
-		return fmt.Errorf("origin URL is required")
+		return errors.New("origin URL is required")
 	}
 
 	if len(cfg.UniqueReplicas()) == 0 {
-		return fmt.Errorf("no replicas configured")
+		return errors.New("no replicas configured")
 	}
 
 	l.With(
@@ -41,10 +41,8 @@ func Sync(cfg *types.Config) error {
 	cfg.Origin.AutoSetup = false
 
 	w := &worker{
-		cfg: cfg,
-		createClient: func(ai types.AdGuardInstance) (client.Client, error) {
-			return client.New(ai)
-		},
+		cfg:          cfg,
+		createClient: client.New,
 	}
 	if cfg.Cron != "" {
 		w.cron = cron.New()
@@ -120,15 +118,15 @@ func (w *worker) status() *syncStatus {
 	return syncStatus
 }
 
-func (w *worker) getStatus(inst types.AdGuardInstance) (st replicaStatus) {
-	st = replicaStatus{Host: inst.WebHost, URL: inst.WebURL}
+func (w *worker) getStatus(inst types.AdGuardInstance) replicaStatus {
+	st := replicaStatus{Host: inst.WebHost, URL: inst.WebURL}
 
 	oc, err := w.createClient(inst)
 	if err != nil {
 		l.With("error", err, "url", w.cfg.Origin.URL).Error("Error creating origin client")
 		st.Status = "danger"
 		st.Error = err.Error()
-		return
+		return st
 	}
 	sl := l.With("from", inst.WebHost)
 	status, err := oc.Status()
@@ -136,16 +134,16 @@ func (w *worker) getStatus(inst types.AdGuardInstance) (st replicaStatus) {
 		if errors.Is(err, client.ErrSetupNeeded) {
 			st.Status = "warning"
 			st.Error = err.Error()
-			return
+			return st
 		}
 		sl.With("error", err).Error("Error getting origin status")
 		st.Status = "danger"
 		st.Error = err.Error()
-		return
+		return st
 	}
 	st.Status = "success"
 	st.ProtectionEnabled = utils.Ptr(status.ProtectionEnabled)
-	return
+	return st
 }
 
 func (w *worker) sync() {

pkg/sync/sync_test.go

@@ -3,16 +3,17 @@ package sync
 import (
 	"errors"
 
+	"github.com/google/uuid"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	gm "go.uber.org/mock/gomock"
+
 	"github.com/bakito/adguardhome-sync/pkg/client"
 	"github.com/bakito/adguardhome-sync/pkg/client/model"
 	clientmock "github.com/bakito/adguardhome-sync/pkg/mocks/client"
 	"github.com/bakito/adguardhome-sync/pkg/types"
 	"github.com/bakito/adguardhome-sync/pkg/utils"
 	"github.com/bakito/adguardhome-sync/pkg/versions"
-	"github.com/google/uuid"
-	. "github.com/onsi/ginkgo/v2"
-	. "github.com/onsi/gomega"
-	gm "go.uber.org/mock/gomock"
 )
 
 var _ = Describe("Sync", func() {

pkg/types/features.go

@@ -25,7 +25,7 @@ func NewFeatures(enabled bool) Features {
 	}
 }
 
-// Features feature flags
+// Features feature flags.
 type Features struct {
 	DNS             DNS  `json:"dns"             yaml:"dns"`
 	DHCP            DHCP `json:"dhcp"            yaml:"dhcp"`
@@ -38,20 +38,20 @@ type Features struct {
 	Theme           bool `json:"theme"           yaml:"theme"           env:"FEATURES_THEME"`
 }
 
-// DHCP features
+// DHCP features.
 type DHCP struct {
-	ServerConfig bool `json:"serverConfig" yaml:"serverConfig" env:"FEATURES_DHCP_SERVER_CONFIG"`
-	StaticLeases bool `json:"staticLeases" yaml:"staticLeases" env:"FEATURES_DHCP_STATIC_LEASES"`
+	ServerConfig bool `env:"FEATURES_DHCP_SERVER_CONFIG" json:"serverConfig" yaml:"serverConfig"`
+	StaticLeases bool `env:"FEATURES_DHCP_STATIC_LEASES" json:"staticLeases" yaml:"staticLeases"`
 }
 
-// DNS features
+// DNS features.
 type DNS struct {
-	AccessLists  bool `json:"accessLists"  yaml:"accessLists"  env:"FEATURES_DNS_ACCESS_LISTS"`
-	ServerConfig bool `json:"serverConfig" yaml:"serverConfig" env:"FEATURES_DNS_SERVER_CONFIG"`
-	Rewrites     bool `json:"rewrites"     yaml:"rewrites"     env:"FEATURES_DNS_REWRITES"`
+	AccessLists  bool `env:"FEATURES_DNS_ACCESS_LISTS"  json:"accessLists"  yaml:"accessLists"`
+	ServerConfig bool `env:"FEATURES_DNS_SERVER_CONFIG" json:"serverConfig" yaml:"serverConfig"`
+	Rewrites     bool `env:"FEATURES_DNS_REWRITES"      json:"rewrites"     yaml:"rewrites"`
 }
 
-// LogDisabled log all disabled features
+// LogDisabled log all disabled features.
 func (f *Features) LogDisabled(l *zap.SugaredLogger) {
 	features := f.collectDisabled()
 

pkg/types/types.go

@@ -11,72 +11,72 @@ import (
 )
 
 const (
-	// DefaultAPIPath default api path
+	// DefaultAPIPath default api path.
 	DefaultAPIPath = "/control"
 )
 
 // Config application configuration struct
 // +k8s:deepcopy-gen=true
 type Config struct {
-	Origin          AdGuardInstance   `json:"origin"                    yaml:"origin"                    env:"ORIGIN"`
-	Replica         *AdGuardInstance  `json:"replica,omitempty"         yaml:"replica,omitempty"         env:"REPLICA"`
-	Replicas        []AdGuardInstance `json:"replicas,omitempty"        yaml:"replicas,omitempty"                                faker:"slice_len=2"`
-	Cron            string            `json:"cron,omitempty"            yaml:"cron,omitempty"            env:"CRON"`
-	RunOnStart      bool              `json:"runOnStart,omitempty"      yaml:"runOnStart,omitempty"      env:"RUN_ON_START"`
-	PrintConfigOnly bool              `json:"printConfigOnly,omitempty" yaml:"printConfigOnly,omitempty" env:"PRINT_CONFIG_ONLY"`
-	ContinueOnError bool              `json:"continueOnError,omitempty" yaml:"continueOnError,omitempty" env:"CONTINUE_ON_ERROR"`
-	API             API               `json:"api,omitempty"             yaml:"api,omitempty"             env:"API"`
-	Features        Features          `json:"features,omitempty"        yaml:"features,omitempty"        env:"FEATURES_"`
+	Origin          AdGuardInstance   `env:"ORIGIN"            json:"origin"                    yaml:"origin"`
+	Replica         *AdGuardInstance  `env:"REPLICA"           json:"replica,omitempty"         yaml:"replica,omitempty"`
+	Replicas        []AdGuardInstance `                        json:"replicas,omitempty"        yaml:"replicas,omitempty"        faker:"slice_len=2"`
+	Cron            string            `env:"CRON"              json:"cron,omitempty"            yaml:"cron,omitempty"`
+	RunOnStart      bool              `env:"RUN_ON_START"      json:"runOnStart,omitempty"      yaml:"runOnStart,omitempty"`
+	PrintConfigOnly bool              `env:"PRINT_CONFIG_ONLY" json:"printConfigOnly,omitempty" yaml:"printConfigOnly,omitempty"`
+	ContinueOnError bool              `env:"CONTINUE_ON_ERROR" json:"continueOnError,omitempty" yaml:"continueOnError,omitempty"`
+	API             API               `env:"API"               json:"api,omitempty"             yaml:"api,omitempty"`
+	Features        Features          `env:"FEATURES_"         json:"features,omitempty"        yaml:"features,omitempty"`
 }
 
-// API configuration
+// API configuration.
 type API struct {
-	Port     int     `json:"port,omitempty"     yaml:"port,omitempty"     env:"API_PORT"`
-	Username string  `json:"username,omitempty" yaml:"username,omitempty" env:"API_USERNAME"`
-	Password string  `json:"password,omitempty" yaml:"password,omitempty" env:"API_PASSWORD"`
-	DarkMode bool    `json:"darkMode,omitempty" yaml:"darkMode,omitempty" env:"API_DARK_MODE"`
-	Metrics  Metrics `json:"metrics,omitempty"  yaml:"metrics,omitempty"  env:"API_METRICS"`
-	TLS      TLS     `json:"tls,omitempty"      yaml:"tls,omitempty"      env:"API_TLS"`
+	Port     int     `env:"API_PORT"      json:"port,omitempty"     yaml:"port,omitempty"`
+	Username string  `env:"API_USERNAME"  json:"username,omitempty" yaml:"username,omitempty"`
+	Password string  `env:"API_PASSWORD"  json:"password,omitempty" yaml:"password,omitempty"`
+	DarkMode bool    `env:"API_DARK_MODE" json:"darkMode,omitempty" yaml:"darkMode,omitempty"`
+	Metrics  Metrics `env:"API_METRICS"   json:"metrics,omitempty"  yaml:"metrics,omitempty"`
+	TLS      TLS     `env:"API_TLS"       json:"tls,omitempty"      yaml:"tls,omitempty"`
 }
 
-// Metrics configuration
+// Metrics configuration.
 type Metrics struct {
-	Enabled        bool          `json:"enabled,omitempty"        yaml:"enabled,omitempty"        env:"API_METRICS_ENABLED"`
-	ScrapeInterval time.Duration `json:"scrapeInterval,omitempty" yaml:"scrapeInterval,omitempty" env:"API_METRICS_SCRAPE_INTERVAL"`
-	QueryLogLimit  int           `json:"queryLogLimit,omitempty"  yaml:"queryLogLimit,omitempty"  env:"API_METRICS_QUERY_LOG_LIMIT"`
+	Enabled        bool          `env:"API_METRICS_ENABLED"         json:"enabled,omitempty"        yaml:"enabled,omitempty"`
+	ScrapeInterval time.Duration `env:"API_METRICS_SCRAPE_INTERVAL" json:"scrapeInterval,omitempty" yaml:"scrapeInterval,omitempty"`
+	QueryLogLimit  int           `env:"API_METRICS_QUERY_LOG_LIMIT" json:"queryLogLimit,omitempty"  yaml:"queryLogLimit,omitempty"`
 }
 
-// TLS configuration
+// TLS configuration.
 type TLS struct {
-	CertDir  string `json:"certDir,omitempty"  yaml:"certDir,omitempty"  env:"API_TLS_CERT_DIR"`
-	CertName string `json:"certName,omitempty" yaml:"certName,omitempty" env:"API_TLS_CERT_NAME"`
-	KeyName  string `json:"keyName,omitempty"  yaml:"keyName,omitempty"  env:"API_TLS_KEY_NAME"`
+	CertDir  string `env:"API_TLS_CERT_DIR"  json:"certDir,omitempty"  yaml:"certDir,omitempty"`
+	CertName string `env:"API_TLS_CERT_NAME" json:"certName,omitempty" yaml:"certName,omitempty"`
+	KeyName  string `env:"API_TLS_KEY_NAME"  json:"keyName,omitempty"  yaml:"keyName,omitempty"`
 }
 
 func (t TLS) Enabled() bool {
 	return strings.TrimSpace(t.CertDir) != ""
 }
 
-func (t TLS) Certs() (cert string, key string) {
+func (t TLS) Certs() (cert, key string) {
 	cert = filepath.Join(t.CertDir, defaultIfEmpty(t.CertName, "tls.crt"))
 	key = filepath.Join(t.CertDir, defaultIfEmpty(t.KeyName, "tls.key"))
-	return
+	return cert, key
 }
 
-func defaultIfEmpty(val string, fallback string) string {
+func defaultIfEmpty(val, fallback string) string {
 	if strings.TrimSpace(val) == "" {
 		return fallback
 	}
 	return val
 }
 
-// Mask maks username and password
+// Mask maks username and password.
 func (a *API) Mask() {
 	a.Username = mask(a.Username)
 	a.Password = mask(a.Password)
 }
 
-// UniqueReplicas get unique replication instances
+// UniqueReplicas get unique replication instances.
 func (cfg *Config) UniqueReplicas() []AdGuardInstance {
 	dedup := make(map[string]AdGuardInstance)
 	if cfg.Replica != nil && cfg.Replica.URL != "" {
@@ -101,7 +101,7 @@ func (cfg *Config) UniqueReplicas() []AdGuardInstance {
 	return r
 }
 
-// Log the current config
+// Log the current config.
 func (cfg *Config) Log(l *zap.SugaredLogger) {
 	c := cfg.mask()
 	l.With("config", c).Debug("Using config")
@@ -140,27 +140,27 @@ func (cfg *Config) Init() error {
 // AdGuardInstance AdguardHome config instance
 // +k8s:deepcopy-gen=true
 type AdGuardInstance struct {
-	URL                string `json:"url"                         yaml:"url"                         env:"URL"                  faker:"url"`
-	WebURL             string `json:"webURL"                      yaml:"webURL"                      env:"WEB_URL"              faker:"url"`
-	APIPath            string `json:"apiPath,omitempty"           yaml:"apiPath,omitempty"           env:"API_PATH"`
-	Username           string `json:"username,omitempty"          yaml:"username,omitempty"          env:"USERNAME"`
-	Password           string `json:"password,omitempty"          yaml:"password,omitempty"          env:"PASSWORD"`
-	Cookie             string `json:"cookie,omitempty"            yaml:"cookie,omitempty"            env:"COOKIE"`
-	InsecureSkipVerify bool   `json:"insecureSkipVerify"          yaml:"insecureSkipVerify"          env:"INSECURE_SKIP_VERIFY"`
-	AutoSetup          bool   `json:"autoSetup"                   yaml:"autoSetup"                   env:"AUTO_SETUP"`
-	InterfaceName      string `json:"interfaceName,omitempty"     yaml:"interfaceName,omitempty"     env:"INTERFACE_NAME"`
-	DHCPServerEnabled  *bool  `json:"dhcpServerEnabled,omitempty" yaml:"dhcpServerEnabled,omitempty" env:"DHCP_SERVER_ENABLED"`
+	URL                string `env:"URL"                  faker:"url" json:"url"                         yaml:"url"`
+	WebURL             string `env:"WEB_URL"              faker:"url" json:"webURL"                      yaml:"webURL"`
+	APIPath            string `env:"API_PATH"                         json:"apiPath,omitempty"           yaml:"apiPath,omitempty"`
+	Username           string `env:"USERNAME"                         json:"username,omitempty"          yaml:"username,omitempty"`
+	Password           string `env:"PASSWORD"                         json:"password,omitempty"          yaml:"password,omitempty"`
+	Cookie             string `env:"COOKIE"                           json:"cookie,omitempty"            yaml:"cookie,omitempty"`
+	InsecureSkipVerify bool   `env:"INSECURE_SKIP_VERIFY"             json:"insecureSkipVerify"          yaml:"insecureSkipVerify"`
+	AutoSetup          bool   `env:"AUTO_SETUP"                       json:"autoSetup"                   yaml:"autoSetup"`
+	InterfaceName      string `env:"INTERFACE_NAME"                   json:"interfaceName,omitempty"     yaml:"interfaceName,omitempty"`
+	DHCPServerEnabled  *bool  `env:"DHCP_SERVER_ENABLED"              json:"dhcpServerEnabled,omitempty" yaml:"dhcpServerEnabled,omitempty"`
 
 	Host    string `json:"-" yaml:"-"`
 	WebHost string `json:"-" yaml:"-"`
 }
 
-// Key AdGuardInstance key
+// Key AdGuardInstance key.
 func (i *AdGuardInstance) Key() string {
 	return fmt.Sprintf("%s#%s", i.URL, i.APIPath)
 }
 
-// Mask maks username and password
+// Mask maks username and password.
 func (i *AdGuardInstance) Mask() {
 	i.Username = mask(i.Username)
 	i.Password = mask(i.Password)
@@ -194,12 +194,12 @@ func mask(s string) string {
 	return fmt.Sprintf("%v%s%v", string(s[0]), mask, string(s[len(s)-1]))
 }
 
-// Protection API struct
+// Protection API struct.
 type Protection struct {
 	ProtectionEnabled bool `json:"protection_enabled"`
 }
 
-// InstallConfig AdguardHome install config
+// InstallConfig AdguardHome install config.
 type InstallConfig struct {
 	Web      InstallPort `json:"web"`
 	DNS      InstallPort `json:"dns"`
@@ -207,7 +207,7 @@ type InstallConfig struct {
 	Password string      `json:"password"`
 }
 
-// InstallPort AdguardHome install config port
+// InstallPort AdguardHome install config port.
 type InstallPort struct {
 	IP         string `json:"ip"`
 	Port       int    `json:"port"`

pkg/utils/clone.go

@@ -1,15 +1,18 @@
 package utils
 
-import "encoding/json"
+import (
+	"bytes"
+	"encoding/json"
+)
 
-func Clone[I interface{}](in I, out I) I {
+func Clone[I any](in, out I) I {
 	b, _ := json.Marshal(in)
 	_ = json.Unmarshal(b, out)
 	return out
 }
 
-func JsonEquals(a interface{}, b interface{}) bool {
+func JSONEquals(a, b any) bool {
 	ja, _ := json.Marshal(a)
 	jb, _ := json.Marshal(b)
-	return string(ja) == string(jb)
+	return bytes.Equal(ja, jb)
 }

pkg/utils/ptr.go

@@ -2,18 +2,18 @@ package utils
 
 import "fmt"
 
-func Ptr[I interface{}](i I) *I {
+func Ptr[I any](i I) *I {
 	return &i
 }
 
-func PtrToString[I interface{}](i *I) string {
+func PtrToString[I any](i *I) string {
 	if i == nil {
 		return ""
 	}
 	return fmt.Sprintf("%v", i)
 }
 
-func PtrEquals[I comparable](a *I, b *I) bool {
+func PtrEquals[I comparable](a, b *I) bool {
 	if a == nil && b == nil {
 		return true
 	}

pkg/versions/versions.go

@@ -3,15 +3,15 @@ package versions
 import "golang.org/x/mod/semver"
 
 const (
-	// MinAgh minimal adguardhome version
+	// MinAgh minimal adguardhome version.
 	MinAgh = "v0.107.40"
 )
 
-func IsNewerThan(v1 string, v2 string) bool {
+func IsNewerThan(v1, v2 string) bool {
 	return semver.Compare(sanitize(v1), sanitize(v2)) == 1
 }
 
-func IsSame(v1 string, v2 string) bool {
+func IsSame(v1, v2 string) bool {
 	return semver.Compare(sanitize(v1), sanitize(v2)) == 0
 }
 

pkg/versions/versions_test.go

@@ -1,9 +1,10 @@
 package versions_test
 
 import (
-	"github.com/bakito/adguardhome-sync/pkg/versions"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
+
+	"github.com/bakito/adguardhome-sync/pkg/versions"
 )
 
 var _ = Describe("Versions", func() {

version/version.go

@@ -1,8 +1,8 @@
 package version
 
 var (
-	// Version the module version
+	// Version the module version.
 	Version = "devel"
-	// Build the build time
+	// Build the build time.
 	Build = "N/A"
 )