tools: run go fix

Change-Id: I30597874e4857d58dc40925c5b54cac3a8012514
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/807640
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

extension/tools/docs2wiki/main.go

diff --git a/extension/tools/docs2wiki/main.go b/extension/tools/docs2wiki/main.go
index f49ffb4..1ec87b8 100644
--- a/extension/tools/docs2wiki/main.go
+++ b/extension/tools/docs2wiki/main.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !windows
-// +build !windows
 
 // Tool docs2wiki rewrites links in ./docs/* to wiki link format.
 // This program may call the 'diff' tool which may be missing on Windows.
@@ -108,11 +107,11 @@
 	if len(src) == 0 || src[0] != '#' {
 		return src
 	}
-	index := bytes.Index(src, []byte("\n"))
-	if index < 0 {
+	_, after, ok := bytes.Cut(src, []byte("\n"))
+	if !ok {
 		return src
 	}
-	return src[index+1:]
+	return after
 }
 
 // find pattern like '](link.md)'
@@ -136,7 +135,7 @@
 	})
 }
 
-func errorf(format string, a ...interface{}) {
+func errorf(format string, a ...any) {
 	fmt.Fprintf(os.Stderr, format+"\n", a...)
 }
 

extension/tools/docs2wiki/main_test.go

diff --git a/extension/tools/docs2wiki/main_test.go b/extension/tools/docs2wiki/main_test.go
index eabb016..c4b452a 100644
--- a/extension/tools/docs2wiki/main_test.go
+++ b/extension/tools/docs2wiki/main_test.go
@@ -1,5 +1,4 @@
 //go:build !windows
-// +build !windows
 
 // Tool docs2wiki rewrites links in ./docs/* to wiki link format.
 package main

extension/tools/generate.go

diff --git a/extension/tools/generate.go b/extension/tools/generate.go
index 83c9c51..1b33406 100644
--- a/extension/tools/generate.go
+++ b/extension/tools/generate.go
@@ -65,9 +65,9 @@
 		Commands      []Command `json:"commands,omitempty"`
 		Configuration struct {
 			Properties map[string]*Property `json:"properties,omitempty"`
-		} `json:"configuration,omitempty"`
+		} `json:"configuration"`
 		Debuggers []Debugger `json:"debuggers,omitempty"`
-	} `json:"contributes,omitempty"`
+	} `json:"contributes"`
 }
 
 type Command struct {
@@ -82,13 +82,13 @@
 	// Below are defined in package.json
 	Properties                 map[string]*Property `json:"properties,omitempty"`
 	AnyOf                      []Property           `json:"anyOf,omitempty"`
-	Default                    interface{}          `json:"default,omitempty"`
+	Default                    any                  `json:"default,omitempty"`
 	MarkdownDescription        string               `json:"markdownDescription,omitempty"`
 	Description                string               `json:"description,omitempty"`
 	MarkdownDeprecationMessage string               `json:"markdownDeprecationMessage,omitempty"`
 	DeprecationMessage         string               `json:"deprecationMessage,omitempty"`
-	Type                       interface{}          `json:"type,omitempty"`
-	Enum                       []interface{}        `json:"enum,omitempty"`
+	Type                       any                  `json:"type,omitempty"`
+	Enum                       []any                `json:"enum,omitempty"`
 	EnumDescriptions           []string             `json:"enumDescriptions,omitempty"`
 	MarkdownEnumDescriptions   []string             `json:"markdownEnumDescriptions,omitempty"`
 	Items                      *Property            `json:"items,omitempty"`
@@ -100,7 +100,7 @@
 	ConfigurationAttributes struct {
 		Launch Configuration
 		Attach Configuration
-	} `json:"configurationAttributes,omitempty"`
+	} `json:"configurationAttributes"`
 }
 
 type Configuration struct {
@@ -341,7 +341,7 @@
 	b := &bytes.Buffer{}
 	switch p.Type {
 	case "object":
-		x, ok := p.Default.(map[string]interface{})
+		x, ok := p.Default.(map[string]any)
 		if !ok {
 			panic(fmt.Sprintf("unexpected type of object: %v", *p))
 		} else if len(x) > 0 {
@@ -353,7 +353,7 @@
 	case "boolean", "number":
 		fmt.Fprintf(b, "%v", p.Default)
 	case "array":
-		x, ok := p.Default.([]interface{})
+		x, ok := p.Default.([]any)
 		if !ok {
 			panic(fmt.Sprintf("unexpected type for array: %v", *p))
 		} else if len(x) > 0 {
@@ -372,7 +372,7 @@
 	return b.String()
 }
 
-func writeMapObject(b *bytes.Buffer, indent string, obj map[string]interface{}) {
+func writeMapObject(b *bytes.Buffer, indent string, obj map[string]any) {
 	keys := []string{}
 	for k := range obj {
 		keys = append(keys, k)
@@ -386,7 +386,7 @@
 		switch v := v.(type) {
 		case string:
 			fmt.Fprintf(b, "%q", v)
-		case map[string]interface{}:
+		case map[string]any:
 			writeMapObject(b, indent+"\t", v)
 		default:
 			fmt.Fprintf(b, "%v", v)

extension/tools/installtools/main.go

diff --git a/extension/tools/installtools/main.go b/extension/tools/installtools/main.go
index f954817..8696345 100644
--- a/extension/tools/installtools/main.go
+++ b/extension/tools/installtools/main.go
@@ -20,6 +20,7 @@
 	"path"
 	"path/filepath"
 	"runtime"
+	"slices"
 	"strings"
 )
 
@@ -80,7 +81,7 @@
 	}
 }
 
-func exitf(format string, args ...interface{}) {
+func exitf(format string, args ...any) {
 	fmt.Fprintf(os.Stderr, format, args...)
 	os.Exit(1)
 }
@@ -101,9 +102,9 @@
 	}
 	// Split up "[go1.1 go1.15]"
 	tags := strings.Fields(result[1 : len(result)-2])
-	for i := len(tags) - 1; i >= 0; i-- {
+	for _, tag := range slices.Backward(tags) {
 		var version int
-		if _, err := fmt.Sscanf(tags[i], "go1.%d", &version); err != nil {
+		if _, err := fmt.Sscanf(tag, "go1.%d", &version); err != nil {
 			continue
 		}
 		return version, nil

internal/vscgo/main.go

diff --git a/internal/vscgo/main.go b/internal/vscgo/main.go
index 831cf89..631f4a8 100644
--- a/internal/vscgo/main.go
+++ b/internal/vscgo/main.go
@@ -105,7 +105,7 @@
 	}
 }
 
-func output(msgs ...interface{}) {
+func output(msgs ...any) {
 	fmt.Fprintln(flag.CommandLine.Output(), msgs...)
 }