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help.go
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help.go
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package root
import (
"bytes"
"fmt"
"strings"
"github.com/cli/cli/pkg/cmdutil"
"github.com/cli/cli/pkg/text"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
func rootUsageFunc(command *cobra.Command) error {
command.Printf("Usage: %s", command.UseLine())
subcommands := command.Commands()
if len(subcommands) > 0 {
command.Print("\n\nAvailable commands:\n")
for _, c := range subcommands {
if c.Hidden {
continue
}
command.Printf(" %s\n", c.Name())
}
return nil
}
flagUsages := command.LocalFlags().FlagUsages()
if flagUsages != "" {
command.Println("\n\nFlags:")
command.Print(text.Indent(dedent(flagUsages), " "))
}
return nil
}
func rootFlagErrorFunc(cmd *cobra.Command, err error) error {
if err == pflag.ErrHelp {
return err
}
return &cmdutil.FlagError{Err: err}
}
var hasFailed bool
// HasFailed signals that the main process should exit with non-zero status
func HasFailed() bool {
return hasFailed
}
// Display helpful error message in case subcommand name was mistyped.
// This matches Cobra's behavior for root command, which Cobra
// confusingly doesn't apply to nested commands.
func nestedSuggestFunc(command *cobra.Command, arg string) {
command.Printf("unknown command %q for %q\n", arg, command.CommandPath())
var candidates []string
if arg == "help" {
candidates = []string{"--help"}
} else {
if command.SuggestionsMinimumDistance <= 0 {
command.SuggestionsMinimumDistance = 2
}
candidates = command.SuggestionsFor(arg)
}
if len(candidates) > 0 {
command.Print("\nDid you mean this?\n")
for _, c := range candidates {
command.Printf("\t%s\n", c)
}
}
command.Print("\n")
_ = rootUsageFunc(command)
}
func isRootCmd(command *cobra.Command) bool {
return command != nil && !command.HasParent()
}
func rootHelpFunc(f *cmdutil.Factory, command *cobra.Command, args []string) {
cs := f.IOStreams.ColorScheme()
if isRootCmd(command.Parent()) && len(args) >= 2 && args[1] != "--help" && args[1] != "-h" {
nestedSuggestFunc(command, args[1])
hasFailed = true
return
}
coreCommands := []string{}
actionsCommands := []string{}
additionalCommands := []string{}
for _, c := range command.Commands() {
if c.Short == "" {
continue
}
if c.Hidden {
continue
}
s := rpad(c.Name()+":", c.NamePadding()) + c.Short
if _, ok := c.Annotations["IsCore"]; ok {
coreCommands = append(coreCommands, s)
} else if _, ok := c.Annotations["IsActions"]; ok {
actionsCommands = append(actionsCommands, s)
} else {
additionalCommands = append(additionalCommands, s)
}
}
// If there are no core commands, assume everything is a core command
if len(coreCommands) == 0 {
coreCommands = additionalCommands
additionalCommands = []string{}
}
type helpEntry struct {
Title string
Body string
}
longText := command.Long
if longText == "" {
longText = command.Short
}
if longText != "" && command.LocalFlags().Lookup("jq") != nil {
longText = strings.TrimRight(longText, "\n") +
"\n\nFor more information about output formatting flags, see `gh help formatting`."
}
helpEntries := []helpEntry{}
if longText != "" {
helpEntries = append(helpEntries, helpEntry{"", longText})
}
helpEntries = append(helpEntries, helpEntry{"USAGE", command.UseLine()})
if len(coreCommands) > 0 {
helpEntries = append(helpEntries, helpEntry{"CORE COMMANDS", strings.Join(coreCommands, "\n")})
}
if len(actionsCommands) > 0 {
helpEntries = append(helpEntries, helpEntry{"ACTIONS COMMANDS", strings.Join(actionsCommands, "\n")})
}
if len(additionalCommands) > 0 {
helpEntries = append(helpEntries, helpEntry{"ADDITIONAL COMMANDS", strings.Join(additionalCommands, "\n")})
}
if isRootCmd(command) {
if exts := f.ExtensionManager.List(); len(exts) > 0 {
var names []string
for _, ext := range exts {
names = append(names, ext.Name())
}
helpEntries = append(helpEntries, helpEntry{"EXTENSION COMMANDS", strings.Join(names, "\n")})
}
}
flagUsages := command.LocalFlags().FlagUsages()
if flagUsages != "" {
helpEntries = append(helpEntries, helpEntry{"FLAGS", dedent(flagUsages)})
}
inheritedFlagUsages := command.InheritedFlags().FlagUsages()
if inheritedFlagUsages != "" {
helpEntries = append(helpEntries, helpEntry{"INHERITED FLAGS", dedent(inheritedFlagUsages)})
}
if _, ok := command.Annotations["help:arguments"]; ok {
helpEntries = append(helpEntries, helpEntry{"ARGUMENTS", command.Annotations["help:arguments"]})
}
if command.Example != "" {
helpEntries = append(helpEntries, helpEntry{"EXAMPLES", command.Example})
}
if _, ok := command.Annotations["help:environment"]; ok {
helpEntries = append(helpEntries, helpEntry{"ENVIRONMENT VARIABLES", command.Annotations["help:environment"]})
}
helpEntries = append(helpEntries, helpEntry{"LEARN MORE", `
Use 'gh <command> <subcommand> --help' for more information about a command.
Read the manual at https://cli.github.com/manual`})
if _, ok := command.Annotations["help:feedback"]; ok {
helpEntries = append(helpEntries, helpEntry{"FEEDBACK", command.Annotations["help:feedback"]})
}
out := command.OutOrStdout()
for _, e := range helpEntries {
if e.Title != "" {
// If there is a title, add indentation to each line in the body
fmt.Fprintln(out, cs.Bold(e.Title))
fmt.Fprintln(out, text.Indent(strings.Trim(e.Body, "\r\n"), " "))
} else {
// If there is no title print the body as is
fmt.Fprintln(out, e.Body)
}
fmt.Fprintln(out)
}
}
// rpad adds padding to the right of a string.
func rpad(s string, padding int) string {
template := fmt.Sprintf("%%-%ds ", padding)
return fmt.Sprintf(template, s)
}
func dedent(s string) string {
lines := strings.Split(s, "\n")
minIndent := -1
for _, l := range lines {
if len(l) == 0 {
continue
}
indent := len(l) - len(strings.TrimLeft(l, " "))
if minIndent == -1 || indent < minIndent {
minIndent = indent
}
}
if minIndent <= 0 {
return s
}
var buf bytes.Buffer
for _, l := range lines {
fmt.Fprintln(&buf, strings.TrimPrefix(l, strings.Repeat(" ", minIndent)))
}
return strings.TrimSuffix(buf.String(), "\n")
}