feat: replace go-multierror with Go 1.20 native joins (#156)

Signed-off-by: Yoan Blanc <yoan@dosimple.ch>

cached_parser.go

@@ -1,11 +1,11 @@
 package editorconfig
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"regexp"
 
-	"github.com/hashicorp/go-multierror"
 	"gopkg.in/ini.v1"
 )
 
@@ -36,7 +36,7 @@ func (parser *CachedParser) ParseIni(filename string) (*Editorconfig, error) {
 
 // ParseIniGraceful parses the given filename to a Definition and caches the result.
 func (parser *CachedParser) ParseIniGraceful(filename string) (*Editorconfig, error, error) {
-	var warning *multierror.Error
+	var warning error
 
 	ec, ok := parser.editorconfigs[filename]
 	if !ok {
@@ -60,13 +60,13 @@ func (parser *CachedParser) ParseIniGraceful(filename string) (*Editorconfig, er
 		}
 
 		if warn != nil {
-			warning = multierror.Append(warning, warn)
+			warning = errors.Join(warning, warn)
 		}
 
 		parser.editorconfigs[filename] = ec
 	}
 
-	return ec, warning.ErrorOrNil(), nil //nolint:wrapcheck
+	return ec, warning, nil
 }
 
 // FnmatchCase calls the module's FnmatchCase and caches the parsed selector.

config.go

@@ -7,7 +7,6 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/hashicorp/go-multierror"
 	"golang.org/x/mod/semver"
 )
 
@@ -27,10 +26,10 @@ type Config struct {
 func (config *Config) Load(filename string) (*Definition, error) {
 	definition, warning, err := config.LoadGraceful(filename)
 	if warning != nil {
-		err = multierror.Append(err, warning)
+		err = errors.Join(err, warning)
 	}
 
-	return definition, err //nolint:wrapcheck
+	return definition, err
 }
 
 // Load loads definition of a given file with warnings and error.
@@ -66,15 +65,15 @@ func (config *Config) LoadGraceful(filename string) (*Definition, error, error)
 		definition.version = version
 	}
 
-	var warning *multierror.Error
+	var warning error
 
 	dir := absFilename
 	for dir != filepath.Dir(dir) {
 		dir = filepath.Dir(dir)
 
 		ec, warn, err := config.Parser.ParseIniGraceful(filepath.Join(dir, ecFile))
 		if warn != nil {
-			warning = multierror.Append(warning, warn)
+			warning = errors.Join(warning, warn)
 		}
 
 		if err != nil {
@@ -105,5 +104,5 @@ func (config *Config) LoadGraceful(filename string) (*Definition, error, error)
 		}
 	}
 
-	return definition, warning.ErrorOrNil(), nil //nolint:wrapcheck
+	return definition, warning, nil
 }

definition.go

@@ -1,11 +1,11 @@
 package editorconfig
 
 import (
+	"errors"
 	"fmt"
 	"strconv"
 	"strings"
 
-	"github.com/hashicorp/go-multierror"
 	"golang.org/x/mod/semver"
 	"gopkg.in/ini.v1"
 )
@@ -35,7 +35,7 @@ func NewDefinition(config Config) (*Definition, error) {
 
 // normalize fixes some values to their lowercase value.
 func (d *Definition) normalize() error {
-	var result *multierror.Error
+	var result error
 
 	d.Charset = strings.ToLower(d.Charset)
 	d.EndOfLine = strings.ToLower(d.Raw["end_of_line"])
@@ -45,7 +45,7 @@ func (d *Definition) normalize() error {
 	if ok && trimTrailingWhitespace != UnsetValue {
 		trim, err := strconv.ParseBool(trimTrailingWhitespace)
 		if err != nil {
-			result = multierror.Append(
+			result = errors.Join(
 				result,
 				fmt.Errorf("trim_trailing_whitespace=%s is not an acceptable value. %w", trimTrailingWhitespace, err),
 			)
@@ -58,7 +58,7 @@ func (d *Definition) normalize() error {
 	if ok && insertFinalNewline != UnsetValue {
 		insert, err := strconv.ParseBool(insertFinalNewline)
 		if err != nil {
-			result = multierror.Append(
+			result = errors.Join(
 				result,
 				fmt.Errorf("insert_final_newline=%s is not an acceptable value. %w", insertFinalNewline, err),
 			)
@@ -72,7 +72,7 @@ func (d *Definition) normalize() error {
 	if ok && tabWidth != UnsetValue {
 		num, err := strconv.Atoi(tabWidth)
 		if err != nil {
-			result = multierror.Append(result, fmt.Errorf("tab_width=%s is not an acceptable value. %w", tabWidth, err))
+			result = errors.Join(result, fmt.Errorf("tab_width=%s is not an acceptable value. %w", tabWidth, err))
 		} else {
 			d.TabWidth = num
 		}
@@ -85,7 +85,7 @@ func (d *Definition) normalize() error {
 		d.TabWidth = num
 	}
 
-	return result.ErrorOrNil() //nolint:wrapcheck
+	return result
 }
 
 // merge the parent definition into the child definition.

editorconfig.go

@@ -2,13 +2,13 @@ package editorconfig
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"os"
 	"runtime"
 	"strings"
 
-	"github.com/hashicorp/go-multierror"
 	"gopkg.in/ini.v1"
 )
 
@@ -90,13 +90,13 @@ func newEditorconfig(iniFile *ini.File) (*Editorconfig, error, error) {
 
 		if err := definition.normalize(); err != nil {
 			// Append those error(s) into the warning
-			warning = multierror.Append(warning, err)
+			warning = errors.Join(warning, err)
 		}
 
 		editorConfig.Definitions = append(editorConfig.Definitions, definition)
 	}
 
-	return editorConfig, warning, nil //nolint:wrapcheck
+	return editorConfig, warning, nil
 }
 
 // GetDefinitionForFilename returns a definition for the given filename.
@@ -216,10 +216,10 @@ func Parse(r io.Reader) (*Editorconfig, error) {
 
 	ec, warning, err := newEditorconfig(iniFile)
 	if warning != nil {
-		err = multierror.Append(warning)
+		err = errors.Join(warning, err)
 	}
 
-	return ec, err //nolint:wrapcheck
+	return ec, err
 }
 
 // ParseGraceful parses from a reader with warnings not treated as a fatal error.
@@ -243,10 +243,10 @@ func ParseBytes(data []byte) (*Editorconfig, error) {
 
 	ec, warning, err := newEditorconfig(iniFile)
 	if warning != nil {
-		err = multierror.Append(warning)
+		err = errors.Join(warning, err)
 	}
 
-	return ec, err //nolint:wrapcheck
+	return ec, err
 }
 
 // ParseFile parses from a file.
@@ -260,10 +260,10 @@ func ParseFile(path string) (*Editorconfig, error) {
 
 	ec, warning, err := newEditorconfig(iniFile)
 	if warning != nil {
-		err = multierror.Append(warning)
+		err = errors.Join(warning, err)
 	}
 
-	return ec, err //nolint:wrapcheck
+	return ec, err
 }
 
 // GetDefinitionForFilename given a filename, searches for .editorconfig files,
@@ -281,7 +281,7 @@ func GetDefinitionForFilename(filename string) (*Definition, error) {
 // previous folders, until it reaches a folder with `root = true`, and returns
 // the right editorconfig definition for the given file.
 //
-// In case of non-fatal errors, a multierror warning is return as well.
+// In case of non-fatal errors, a joined errors warning is return as well.
 func GetDefinitionForFilenameGraceful(filename string) (*Definition, error, error) {
 	config := new(Config)
 
@@ -305,7 +305,7 @@ func GetDefinitionForFilenameWithConfigname(filename string, configname string)
 // walking through the previous folders, until it reaches a folder with `root =
 // true`, and returns the right editorconfig definition for the given file.
 //
-// In case of non-fatal errors, a multierror warning is return as well.
+// In case of non-fatal errors, a joined errors warning is return as well.
 func GetDefinitionForFilenameWithConfignameGraceful(filename string, configname string) (*Definition, error, error) {
 	config := &Config{
 		Name: configname,

editorconfig_test.go

@@ -4,11 +4,10 @@ import (
 	"errors"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 	"testing/iotest"
 
-	"github.com/hashicorp/go-multierror"
-
 	"github.com/editorconfig/editorconfig-core-go/v2/internal/assert"
 )
 
@@ -167,10 +166,10 @@ func TestPublicTestDefinitionForFilenameWithConfigname(t *testing.T) {
 
 	def, warning, err := GetDefinitionForFilenameWithConfignameGraceful("testdata/root/src/dummy.go", "a.ini")
 
-	if merr, ok := warning.(*multierror.Error); ok { //nolint:errorlint
-		// 3 errors are expected
-		assert.Equal(t, 3, len(merr.Errors))
-	}
+	// Checking that we've got three warnings by splitting the lines
+	message := warning.Error()
+	merr := strings.Split(message, "\n")
+	assert.Equal(t, 3, len(merr))
 
 	assert.Nil(t, err)
 	assert.Equal(t, "5", def.IndentSize)

go.mod

@@ -1,15 +1,11 @@
 module github.com/editorconfig/editorconfig-core-go/v2
 
-go 1.18
+go 1.20
 
 require (
 	github.com/google/go-cmp v0.5.9
-	github.com/hashicorp/go-multierror v1.1.1
 	golang.org/x/mod v0.12.0
 	gopkg.in/ini.v1 v1.67.0
 )
 
-require (
-	github.com/hashicorp/errwrap v1.0.0 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
-)
+require github.com/stretchr/testify v1.7.0 // indirect

go.sum

@@ -2,10 +2,6 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
-github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
-github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
-github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=

parser.go

@@ -9,7 +9,7 @@ type Parser interface {
 
 	// ParseIni takes one .editorconfig (ini format) filename and returns its
 	// Editorconfig definition. In case of non fatal warnings, they are in
-	// a multierror and might be ignored in some cases.
+	// a joined errors and might be ignored in some cases.
 	ParseIniGraceful(filename string) (*Editorconfig, error, error)
 
 	// FnmatchCase takes a pattern, a filename, and tells wether the given filename