Upgrade to golangci-lint v2 (#1008)

cmd/gotoml-test-decoder/main.go

@@ -1,3 +1,4 @@
+// Package gotoml-test-decoder is a minimal decoder program used to compare this library with other TOML implementations.
 package main
 
 import (

cmd/gotoml-test-encoder/main.go

@@ -1,3 +1,4 @@
+// Package gotoml-test-encoder is a minimal encoder program used to compare this library with other TOML implementations.
 package main
 
 import (
@@ -24,7 +25,7 @@ func main() {
 }
 
 func usage() {
-	log.Printf("Usage: %s < toml-file\n", path.Base(os.Args[0]))
+	log.Printf("Usage: %s < json-file\n", path.Base(os.Args[0]))
 	flag.PrintDefaults()
 	os.Exit(1)
 }

cmd/jsontoml/main.go

@@ -34,10 +34,10 @@ Reading from a file:
   jsontoml file.json > file.toml
 `
 
-var useJsonNumber bool
+var useJSONNumber bool
 
 func main() {
-	flag.BoolVar(&useJsonNumber, "use-json-number", false, "unmarshal numbers into `json.Number` type instead of as `float64`")
+	flag.BoolVar(&useJSONNumber, "use-json-number", false, "unmarshal numbers into `json.Number` type instead of as `float64`")
 
 	p := cli.Program{
 		Usage: usage,
@@ -52,9 +52,9 @@ func convert(r io.Reader, w io.Writer) error {
 	d := json.NewDecoder(r)
 	e := toml.NewEncoder(w)
 
-	if useJsonNumber {
+	if useJSONNumber {
 		d.UseNumber()
-		e.SetMarshalJsonNumbers(true)
+		e.SetMarshalJSONNumbers(true)
 	}
 
 	err := d.Decode(&v)

cmd/jsontoml/main_test.go

@@ -14,7 +14,7 @@ func TestConvert(t *testing.T) {
 		input         string
 		expected      string
 		errors        bool
-		useJsonNumber bool
+		useJSONNumber bool
 	}{
 		{
 			name: "valid json",
@@ -30,7 +30,7 @@ a = 42.0
 		},
 		{
 			name:          "use json number",
-			useJsonNumber: true,
+			useJSONNumber: true,
 			input: `
 {
   "mytoml": {
@@ -50,7 +50,7 @@ a = 42
 
 	for _, e := range examples {
 		b := new(bytes.Buffer)
-		useJsonNumber = e.useJsonNumber
+		useJSONNumber = e.useJSONNumber
 		err := convert(strings.NewReader(e.input), b)
 		if e.errors {
 			assert.Error(t, err)

cmd/tomljson/main_test.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"bytes"
-	"fmt"
+	"errors"
 	"io"
 	"strings"
 	"testing"
@@ -56,5 +56,5 @@ a = 42`),
 type badReader struct{}
 
 func (r *badReader) Read([]byte) (int, error) {
-	return 0, fmt.Errorf("reader failed on purpose")
+	return 0, errors.New("reader failed on purpose")
 }

cmd/tomltestgen/main.go

@@ -18,6 +18,7 @@ import (
 	"strings"
 	"text/template"
 	"time"
+	"unicode"
 )
 
 type invalid struct {
@@ -28,7 +29,7 @@ type invalid struct {
 type valid struct {
 	Name    string
 	Input   string
-	JsonRef string
+	JSONRef string
 }
 
 type testsCollection struct {
@@ -39,12 +40,11 @@ type testsCollection struct {
 	Count     int
 }
 
-const srcTemplate = "// Generated by tomltestgen for toml-test ref {{.Ref}} on {{.Timestamp}}\n" +
+const srcTemplate = "// Code generated by tomltestgen for toml-test ref {{.Ref}} on {{.Timestamp}}. DO NOT EDIT.\n" +
 	"package toml_test\n" +
 	" import (\n" +
 	"	\"testing\"\n" +
 	")\n" +
-
 	"{{range .Invalid}}\n" +
 	"func TestTOMLTest_Invalid_{{.Name}}(t *testing.T) {\n" +
 	"	input := {{.Input|gostr}}\n" +
@@ -55,28 +55,31 @@ const srcTemplate = "// Generated by tomltestgen for toml-test ref {{.Ref}} on {
 	"{{range .Valid}}\n" +
 	"func TestTOMLTest_Valid_{{.Name}}(t *testing.T) {\n" +
 	"   input := {{.Input|gostr}}\n" +
-	"   jsonRef := {{.JsonRef|gostr}}\n" +
+	"   jsonRef := {{.JSONRef|gostr}}\n" +
 	"   testgenValid(t, input, jsonRef)\n" +
 	"}\n" +
 	"{{end}}\n"
 
 func kebabToCamel(kebab string) string {
-	camel := ""
+	var buf strings.Builder
 	nextUpper := true
 	for _, c := range kebab {
 		if nextUpper {
-			camel += strings.ToUpper(string(c))
+			buf.WriteRune(unicode.ToUpper(c))
 			nextUpper = false
-		} else if c == '-' {
-			nextUpper = true
-		} else if c == '/' {
-			nextUpper = true
-			camel += "_"
 		} else {
-			camel += string(c)
+			switch c {
+			case '-':
+				nextUpper = true
+			case '/':
+				nextUpper = true
+				buf.WriteByte('_')
+			default:
+				buf.WriteRune(c)
+			}
 		}
 	}
-	return camel
+	return buf.String()
 }
 
 func templateGoStr(input string) string {
@@ -110,7 +113,7 @@ func main() {
 
 		log.Printf("> [%s] %s\n", "invalid", name)
 
-		tomlContent, err := os.ReadFile(f)
+		tomlContent, err := os.ReadFile(f) // #nosec G304
 		if err != nil {
 			fmt.Printf("failed to read test file: %s\n", err)
 			os.Exit(1)
@@ -131,14 +134,14 @@ func main() {
 
 		log.Printf("> [%s] %s\n", "valid", name)
 
-		tomlContent, err := os.ReadFile(f)
+		tomlContent, err := os.ReadFile(f) // #nosec G304
 		if err != nil {
 			fmt.Printf("failed reading test file: %s\n", err)
 			os.Exit(1)
 		}
 
 		filename = strings.TrimSuffix(f, ".toml")
-		jsonContent, err := os.ReadFile(filename + ".json")
+		jsonContent, err := os.ReadFile(filename + ".json") // #nosec G304
 		if err != nil {
 			fmt.Printf("failed reading validation json: %s\n", err)
 			os.Exit(1)
@@ -147,7 +150,7 @@ func main() {
 		collection.Valid = append(collection.Valid, valid{
 			Name:    name,
 			Input:   string(tomlContent),
-			JsonRef: string(jsonContent),
+			JSONRef: string(jsonContent),
 		})
 		collection.Count++
 	}
@@ -173,7 +176,7 @@ func main() {
 		return
 	}
 
-	err = os.WriteFile(*out, outputBytes, 0o644)
+	err = os.WriteFile(*out, outputBytes, 0o600)
 	if err != nil {
 		panic(err)
 	}