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100 lines
2.5 KiB
100 lines
2.5 KiB
package console
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"gitoa.ru/go-4devs/console/input"
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"gitoa.ru/go-4devs/console/input/argument"
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"gitoa.ru/go-4devs/console/input/flag"
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"gitoa.ru/go-4devs/console/input/option"
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"gitoa.ru/go-4devs/console/input/validator"
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"gitoa.ru/go-4devs/console/input/value"
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"gitoa.ru/go-4devs/console/output"
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"gitoa.ru/go-4devs/console/output/descriptor"
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)
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//nolint:gochecknoinits
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func init() {
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MustRegister(help())
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}
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const (
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HelpArgumentCommandName = "command_name"
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helpOptFormat = "format"
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)
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func help() *Command {
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return &Command{
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Name: CommandHelp,
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Description: `Displays help for a command`,
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Help: `
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The <info>{{ .Name }}</info> command displays help for a given command:
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<info>{{ .Bin }} {{ .Name }} list</info>
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You can also output the help in other formats by using the <comment>--format</comment> option:
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<info>{{ .Bin }} {{ .Name }} --format=xml list</info>
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To display the list of available commands, please use the <info>list</info> command.
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`,
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Execute: func(ctx context.Context, in input.Input, out output.Output) error {
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var err error
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name := in.Argument(ctx, HelpArgumentCommandName).String()
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format := in.Option(ctx, helpOptFormat).String()
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des, err := descriptor.Find(format)
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if err != nil {
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return fmt.Errorf("find descriptor: %w", err)
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}
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cmd, err := Find(name)
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if err != nil {
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return fmt.Errorf("find cmd: %w", err)
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}
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def := input.NewDefinition()
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if err := cmd.Init(ctx, Default(def)); err != nil {
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return fmt.Errorf("init cmd: %w", err)
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}
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var bin string
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if len(os.Args) > 0 {
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bin = os.Args[0]
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}
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derr := des.Command(ctx, out, descriptor.Command{
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Bin: bin,
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Name: cmd.Name,
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Description: cmd.Description,
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Help: cmd.Help,
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Definition: def,
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})
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if derr != nil {
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return fmt.Errorf("descriptor help:%w", derr)
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}
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return nil
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},
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Configure: func(ctx context.Context, config *input.Definition) error {
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formats := descriptor.Descriptors()
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config.
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SetArguments(
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argument.String(HelpArgumentCommandName, "The command name", argument.Default(value.New("help"))),
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).
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SetOptions(
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option.String(helpOptFormat, fmt.Sprintf("The output format (%s)", strings.Join(formats, ", ")),
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option.Required,
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option.Default(formats[0]),
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option.Valid(
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validator.NotBlank(flag.String),
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validator.Enum(formats...),
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),
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),
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)
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return nil
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},
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}
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}
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