Test also with go 1.23 (#2182)

Fixing golangci-lint errors[1]:

    Error: SA1019: "io/ioutil" has been deprecated since Go 1.19: As of
    Go 1.16, the same functionality is now provided by package [io] or
    package [os], and those implementations should be preferred in new
    code. See the specific function documentation for details.
    (staticcheck)

[1] https://github.com/spf13/cobra/actions/runs/10535452454/job/29194442289?pr=2180

.github/workflows/test.yml

@@ -67,6 +67,7 @@ jobs:
         - 20
         - 21
         - 22
+        - 23
     name: '${{ matrix.platform }} | 1.${{ matrix.go }}.x'
     runs-on: ${{ matrix.platform }}-latest
     steps:

.golangci.yml

@@ -26,33 +26,28 @@ linters:
     - errcheck
     #- exhaustive
     #- funlen
-    - gas
     #- gochecknoinits
     - goconst
-    #- gocritic
+    - gocritic
     #- gocyclo
-    #- gofmt
+    - gofmt
     - goimports
-    - golint
     #- gomnd
     #- goprintffuncname
-    #- gosec
+    - gosec
-    #- gosimple
+    - gosimple
     - govet
     - ineffassign
-    - interfacer
     #- lll
-    - maligned
+    - misspell
-    - megacheck
-    #- misspell
     #- nakedret
     #- noctx
-    #- nolintlint
+    - nolintlint
     #- rowserrcheck
     #- scopelint
-    #- staticcheck
+    - staticcheck
     #- structcheck ! deprecated since v1.49.0; replaced by 'unused'
-    #- stylecheck
+    - stylecheck
     #- typecheck
     - unconvert
     #- unparam

bash_completions.go

@@ -597,9 +597,7 @@ func writeRequiredFlag(buf io.StringWriter, cmd *Command) {
 		if nonCompletableFlag(flag) {
 			return
 		}
-		for key := range flag.Annotations {
+		if _, ok := flag.Annotations[BashCompOneRequiredFlag]; ok {
-			switch key {
-			case BashCompOneRequiredFlag:
 			format := "    must_have_one_flag+=(\"--%s"
 			if flag.Value.Type() != "bool" {
 				format += "="
@@ -611,7 +609,6 @@ func writeRequiredFlag(buf io.StringWriter, cmd *Command) {
 				WriteStringAndCheck(buf, fmt.Sprintf("    must_have_one_flag+=(\"-%s"+cbn, flag.Shorthand))
 			}
 		}
-		}
 	})
 }
 

command.go

@@ -281,6 +281,7 @@ func (c *Command) SetArgs(a []string) {
 
 // SetOutput sets the destination for usage and error messages.
 // If output is nil, os.Stderr is used.
+//
 // Deprecated: Use SetOut and/or SetErr instead
 func (c *Command) SetOutput(output io.Writer) {
 	c.outWriter = output
@@ -875,7 +876,7 @@ func (c *Command) ArgsLenAtDash() int {
 
 func (c *Command) execute(a []string) (err error) {
 	if c == nil {
-		return fmt.Errorf("Called Execute() on a nil Command")
+		return fmt.Errorf("called Execute() on a nil Command")
 	}
 
 	if len(c.Deprecated) > 0 {
@@ -1460,7 +1461,6 @@ func (c *Command) UseLine() string {
 
 // DebugFlags used to determine which flags have been assigned to which commands
 // and which persist.
-// nolint:goconst
 func (c *Command) DebugFlags() {
 	c.Println("DebugFlags called on", c.Name())
 	var debugflags func(*Command)

command_test.go

@@ -2777,7 +2777,7 @@ func TestFind(t *testing.T) {
 
 func TestUnknownFlagShouldReturnSameErrorRegardlessOfArgPosition(t *testing.T) {
 	testCases := [][]string{
-		//{"--unknown", "--namespace", "foo", "child", "--bar"}, // FIXME: This test case fails, returning the error `unknown command "foo" for "root"` instead of the expected error `unknown flag: --unknown`
+		// {"--unknown", "--namespace", "foo", "child", "--bar"}, // FIXME: This test case fails, returning the error `unknown command "foo" for "root"` instead of the expected error `unknown flag: --unknown`
 		{"--namespace", "foo", "--unknown", "child", "--bar"},
 		{"--namespace", "foo", "child", "--unknown", "--bar"},
 		{"--namespace", "foo", "child", "--bar", "--unknown"},

completions.go

@@ -298,7 +298,7 @@ func (c *Command) getCompletions(args []string) (*Command, []string, ShellCompDi
 	}
 	if err != nil {
 		// Unable to find the real command. E.g., <program> someInvalidCmd <TAB>
-		return c, []string{}, ShellCompDirectiveDefault, fmt.Errorf("Unable to find a command for arguments: %v", trimmedArgs)
+		return c, []string{}, ShellCompDirectiveDefault, fmt.Errorf("unable to find a command for arguments: %v", trimmedArgs)
 	}
 	finalCmd.ctx = c.ctx
 
@@ -401,8 +401,9 @@ func (c *Command) getCompletions(args []string) (*Command, []string, ShellCompDi
 			doCompleteFlags := func(flag *pflag.Flag) {
 				if !flag.Changed ||
 					strings.Contains(flag.Value.Type(), "Slice") ||
-					strings.Contains(flag.Value.Type(), "Array") {
+					strings.Contains(flag.Value.Type(), "Array") ||
-					// If the flag is not already present, or if it can be specified multiple times (Array or Slice)
+					strings.HasPrefix(flag.Value.Type(), "stringTo") {
+					// If the flag is not already present, or if it can be specified multiple times (Array, Slice, or stringTo)
 					// we suggest it as a completion
 					completions = append(completions, getFlagNameCompletions(flag, toComplete)...)
 				}

doc/man_docs.go

@@ -133,7 +133,7 @@ func fillHeader(header *GenManHeader, name string, disableAutoGen bool) error {
 		}
 		header.Date = &now
 	}
-	header.date = (*header.Date).Format("Jan 2006")
+	header.date = header.Date.Format("Jan 2006")
 	if header.Source == "" && !disableAutoGen {
 		header.Source = "Auto generated by spf13/cobra"
 	}

doc/man_docs_test.go

@@ -18,7 +18,6 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -168,7 +167,7 @@ func TestManPrintFlagsHidesShortDeprecated(t *testing.T) {
 func TestGenManTree(t *testing.T) {
 	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
 	header := &GenManHeader{Section: "2"}
-	tmpdir, err := ioutil.TempDir("", "test-gen-man-tree")
+	tmpdir, err := os.MkdirTemp("", "test-gen-man-tree")
 	if err != nil {
 		t.Fatalf("Failed to create tmpdir: %s", err.Error())
 	}
@@ -219,7 +218,7 @@ func assertNextLineEquals(scanner *bufio.Scanner, expectedLine string) error {
 }
 
 func BenchmarkGenManToFile(b *testing.B) {
-	file, err := ioutil.TempFile("", "")
+	file, err := os.CreateTemp("", "")
 	if err != nil {
 		b.Fatal(err)
 	}

doc/md_docs_test.go

@@ -16,7 +16,6 @@ package doc
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -94,7 +93,7 @@ func TestGenMdNoTag(t *testing.T) {
 
 func TestGenMdTree(t *testing.T) {
 	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
-	tmpdir, err := ioutil.TempDir("", "test-gen-md-tree")
+	tmpdir, err := os.MkdirTemp("", "test-gen-md-tree")
 	if err != nil {
 		t.Fatalf("Failed to create tmpdir: %v", err)
 	}
@@ -110,7 +109,7 @@ func TestGenMdTree(t *testing.T) {
 }
 
 func BenchmarkGenMarkdownToFile(b *testing.B) {
-	file, err := ioutil.TempFile("", "")
+	file, err := os.CreateTemp("", "")
 	if err != nil {
 		b.Fatal(err)
 	}

doc/rest_docs_test.go

@@ -16,7 +16,6 @@ package doc
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -81,7 +80,7 @@ func TestGenRSTNoTag(t *testing.T) {
 func TestGenRSTTree(t *testing.T) {
 	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
 
-	tmpdir, err := ioutil.TempDir("", "test-gen-rst-tree")
+	tmpdir, err := os.MkdirTemp("", "test-gen-rst-tree")
 	if err != nil {
 		t.Fatalf("Failed to create tmpdir: %s", err.Error())
 	}
@@ -97,7 +96,7 @@ func TestGenRSTTree(t *testing.T) {
 }
 
 func BenchmarkGenReSTToFile(b *testing.B) {
-	file, err := ioutil.TempFile("", "")
+	file, err := os.CreateTemp("", "")
 	if err != nil {
 		b.Fatal(err)
 	}

doc/util.go

@@ -40,7 +40,7 @@ func hasSeeAlso(cmd *cobra.Command) bool {
 // that do not contain \n.
 func forceMultiLine(s string) string {
 	if len(s) > 60 && !strings.Contains(s, "\n") {
-		s = s + "\n"
+		s += "\n"
 	}
 	return s
 }

doc/yaml_docs_test.go

@@ -17,7 +17,6 @@ package doc
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -58,7 +57,7 @@ func TestGenYamlNoTag(t *testing.T) {
 func TestGenYamlTree(t *testing.T) {
 	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
 
-	tmpdir, err := ioutil.TempDir("", "test-gen-yaml-tree")
+	tmpdir, err := os.MkdirTemp("", "test-gen-yaml-tree")
 	if err != nil {
 		t.Fatalf("Failed to create tmpdir: %s", err.Error())
 	}
@@ -85,7 +84,7 @@ func TestGenYamlDocRunnable(t *testing.T) {
 }
 
 func BenchmarkGenYamlToFile(b *testing.B) {
-	file, err := ioutil.TempFile("", "")
+	file, err := os.CreateTemp("", "")
 	if err != nil {
 		b.Fatal(err)
 	}

flag_groups.go

@@ -23,9 +23,9 @@ import (
 )
 
 const (
-	requiredAsGroup   = "cobra_annotation_required_if_others_set"
+	requiredAsGroupAnnotation   = "cobra_annotation_required_if_others_set"
-	oneRequired       = "cobra_annotation_one_required"
+	oneRequiredAnnotation       = "cobra_annotation_one_required"
-	mutuallyExclusive = "cobra_annotation_mutually_exclusive"
+	mutuallyExclusiveAnnotation = "cobra_annotation_mutually_exclusive"
 )
 
 // MarkFlagsRequiredTogether marks the given flags with annotations so that Cobra errors
@@ -37,7 +37,7 @@ func (c *Command) MarkFlagsRequiredTogether(flagNames ...string) {
 		if f == nil {
 			panic(fmt.Sprintf("Failed to find flag %q and mark it as being required in a flag group", v))
 		}
-		if err := c.Flags().SetAnnotation(v, requiredAsGroup, append(f.Annotations[requiredAsGroup], strings.Join(flagNames, " "))); err != nil {
+		if err := c.Flags().SetAnnotation(v, requiredAsGroupAnnotation, append(f.Annotations[requiredAsGroupAnnotation], strings.Join(flagNames, " "))); err != nil {
 			// Only errs if the flag isn't found.
 			panic(err)
 		}
@@ -53,7 +53,7 @@ func (c *Command) MarkFlagsOneRequired(flagNames ...string) {
 		if f == nil {
 			panic(fmt.Sprintf("Failed to find flag %q and mark it as being in a one-required flag group", v))
 		}
-		if err := c.Flags().SetAnnotation(v, oneRequired, append(f.Annotations[oneRequired], strings.Join(flagNames, " "))); err != nil {
+		if err := c.Flags().SetAnnotation(v, oneRequiredAnnotation, append(f.Annotations[oneRequiredAnnotation], strings.Join(flagNames, " "))); err != nil {
 			// Only errs if the flag isn't found.
 			panic(err)
 		}
@@ -70,7 +70,7 @@ func (c *Command) MarkFlagsMutuallyExclusive(flagNames ...string) {
 			panic(fmt.Sprintf("Failed to find flag %q and mark it as being in a mutually exclusive flag group", v))
 		}
 		// Each time this is called is a single new entry; this allows it to be a member of multiple groups if needed.
-		if err := c.Flags().SetAnnotation(v, mutuallyExclusive, append(f.Annotations[mutuallyExclusive], strings.Join(flagNames, " "))); err != nil {
+		if err := c.Flags().SetAnnotation(v, mutuallyExclusiveAnnotation, append(f.Annotations[mutuallyExclusiveAnnotation], strings.Join(flagNames, " "))); err != nil {
 			panic(err)
 		}
 	}
@@ -91,9 +91,9 @@ func (c *Command) ValidateFlagGroups() error {
 	oneRequiredGroupStatus := map[string]map[string]bool{}
 	mutuallyExclusiveGroupStatus := map[string]map[string]bool{}
 	flags.VisitAll(func(pflag *flag.Flag) {
-		processFlagForGroupAnnotation(flags, pflag, requiredAsGroup, groupStatus)
+		processFlagForGroupAnnotation(flags, pflag, requiredAsGroupAnnotation, groupStatus)
-		processFlagForGroupAnnotation(flags, pflag, oneRequired, oneRequiredGroupStatus)
+		processFlagForGroupAnnotation(flags, pflag, oneRequiredAnnotation, oneRequiredGroupStatus)
-		processFlagForGroupAnnotation(flags, pflag, mutuallyExclusive, mutuallyExclusiveGroupStatus)
+		processFlagForGroupAnnotation(flags, pflag, mutuallyExclusiveAnnotation, mutuallyExclusiveGroupStatus)
 	})
 
 	if err := validateRequiredFlagGroups(groupStatus); err != nil {
@@ -232,9 +232,9 @@ func (c *Command) enforceFlagGroupsForCompletion() {
 	oneRequiredGroupStatus := map[string]map[string]bool{}
 	mutuallyExclusiveGroupStatus := map[string]map[string]bool{}
 	c.Flags().VisitAll(func(pflag *flag.Flag) {
-		processFlagForGroupAnnotation(flags, pflag, requiredAsGroup, groupStatus)
+		processFlagForGroupAnnotation(flags, pflag, requiredAsGroupAnnotation, groupStatus)
-		processFlagForGroupAnnotation(flags, pflag, oneRequired, oneRequiredGroupStatus)
+		processFlagForGroupAnnotation(flags, pflag, oneRequiredAnnotation, oneRequiredGroupStatus)
-		processFlagForGroupAnnotation(flags, pflag, mutuallyExclusive, mutuallyExclusiveGroupStatus)
+		processFlagForGroupAnnotation(flags, pflag, mutuallyExclusiveAnnotation, mutuallyExclusiveGroupStatus)
 	})
 
 	// If a flag that is part of a group is present, we make all the other flags

go.mod

@@ -3,7 +3,7 @@ module github.com/spf13/cobra
 go 1.15
 
 require (
-	github.com/cpuguy83/go-md2man/v2 v2.0.3
+	github.com/cpuguy83/go-md2man/v2 v2.0.4
 	github.com/inconshreveable/mousetrap v1.1.0
 	github.com/spf13/pflag v1.0.5
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -1,5 +1,5 @@
-github.com/cpuguy83/go-md2man/v2 v2.0.3 h1:qMCsGGgs+MAzDFyp9LpAe1Lqy/fY/qCovCm0qnXZOBM=
+github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
-github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=

powershell_completions.go

@@ -28,8 +28,8 @@ import (
 func genPowerShellComp(buf io.StringWriter, name string, includeDesc bool) {
 	// Variables should not contain a '-' or ':' character
 	nameForVar := name
-	nameForVar = strings.Replace(nameForVar, "-", "_", -1)
+	nameForVar = strings.ReplaceAll(nameForVar, "-", "_")
-	nameForVar = strings.Replace(nameForVar, ":", "_", -1)
+	nameForVar = strings.ReplaceAll(nameForVar, ":", "_")
 
 	compCmd := ShellCompRequestCmd
 	if !includeDesc {

site/content/docgen/md.md

@@ -35,7 +35,7 @@ package main
 
 import (
 	"log"
-	"io/ioutil"
+	"io"
 	"os"
 
 	"k8s.io/kubernetes/pkg/kubectl/cmd"
@@ -45,7 +45,7 @@ import (
 )
 
 func main() {
-	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, io.Discard, io.Discard)
 	err := doc.GenMarkdownTree(kubectl, "./")
 	if err != nil {
 		log.Fatal(err)

site/content/docgen/rest.md

@@ -35,7 +35,7 @@ package main
 
 import (
 	"log"
-	"io/ioutil"
+	"io"
 	"os"
 
 	"k8s.io/kubernetes/pkg/kubectl/cmd"
@@ -45,7 +45,7 @@ import (
 )
 
 func main() {
-	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, io.Discard, io.Discard)
 	err := doc.GenReSTTree(kubectl, "./")
 	if err != nil {
 		log.Fatal(err)

site/content/docgen/yaml.md

@@ -34,7 +34,7 @@ This program can actually generate docs for the kubectl command in the kubernete
 package main
 
 import (
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 
@@ -45,7 +45,7 @@ import (
 )
 
 func main() {
-	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, io.Discard, io.Discard)
 	err := doc.GenYamlTree(kubectl, "./")
 	if err != nil {
 		log.Fatal(err)

site/content/user_guide.md

@@ -3,7 +3,7 @@
 While you are welcome to provide your own organization, typically a Cobra-based
 application will follow the following organizational structure:
 
-```
+```test
   ▾ appName/
     ▾ cmd/
         add.go
@@ -301,6 +301,7 @@ command := cobra.Command{
 ### Bind Flags with Config
 
 You can also bind your flags with [viper](https://github.com/spf13/viper):
+
 ```go
 var author string
 
@@ -320,12 +321,14 @@ More in [viper documentation](https://github.com/spf13/viper#working-with-flags)
 
 Flags are optional by default. If instead you wish your command to report an error
 when a flag has not been set, mark it as required:
+
 ```go
 rootCmd.Flags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
 rootCmd.MarkFlagRequired("region")
 ```
 
 Or, for persistent flags:
+
 ```go
 rootCmd.PersistentFlags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
 rootCmd.MarkPersistentFlagRequired("region")
@@ -335,6 +338,7 @@ rootCmd.MarkPersistentFlagRequired("region")
 
 If you have different flags that must be provided together (e.g. if they provide the `--username` flag they MUST provide the `--password` flag as well) then
 Cobra can enforce that requirement:
+
 ```go
 rootCmd.Flags().StringVarP(&u, "username", "u", "", "Username (required if password is set)")
 rootCmd.Flags().StringVarP(&pw, "password", "p", "", "Password (required if username is set)")
@@ -343,6 +347,7 @@ rootCmd.MarkFlagsRequiredTogether("username", "password")
 
 You can also prevent different flags from being provided together if they represent mutually
 exclusive options such as specifying an output format as either `--json` or `--yaml` but never both:
+
 ```go
 rootCmd.Flags().BoolVar(&ofJson, "json", false, "Output in JSON")
 rootCmd.Flags().BoolVar(&ofYaml, "yaml", false, "Output in YAML")
@@ -351,6 +356,7 @@ rootCmd.MarkFlagsMutuallyExclusive("json", "yaml")
 
 If you want to require at least one flag from a group to be present, you can use `MarkFlagsOneRequired`.
 This can be combined with `MarkFlagsMutuallyExclusive` to enforce exactly one flag from a given group:
+
 ```go
 rootCmd.Flags().BoolVar(&ofJson, "json", false, "Output in JSON")
 rootCmd.Flags().BoolVar(&ofYaml, "yaml", false, "Output in YAML")
@@ -428,7 +434,7 @@ by not providing a 'Run' for the 'rootCmd'.
 
 We have only defined one flag for a single command.
 
-More documentation about flags is available at https://github.com/spf13/pflag
+More documentation about flags is available at https://github.com/spf13/pflag.
 
 ```go
 package main
@@ -722,7 +728,7 @@ command.SuggestionsMinimumDistance = 1
 You can also explicitly set names for which a given command will be suggested using the `SuggestFor` attribute. This allows suggestions for strings that are not close in terms of string distance, but make sense in your set of commands but for which
 you don't want aliases. Example:
 
-```
+```bash
 $ kubectl remove
 Error: unknown command "remove" for "kubectl"
 
@@ -787,7 +793,7 @@ func main() {
 
 Example run as a kubectl plugin:
 
-```
+```bash
 $ kubectl myplugin
 Usage:
   kubectl myplugin [command]