90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
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package cli
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import (
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"io"
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"strings"
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"text/tabwriter"
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"text/template"
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"github.com/Masterminds/sprig"
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"github.com/containous/traefik/pkg/config/flag"
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"github.com/containous/traefik/pkg/config/generator"
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"github.com/containous/traefik/pkg/config/parser"
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)
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const tmplHelp = `{{ .Cmd.Name }} {{ .Cmd.Description }}
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Usage: {{ .Cmd.Name }} [command] [flags] [arguments]
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Use "{{ .Cmd.Name }} [command] --help" for help on any command.
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{{if .SubCommands }}
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Commands:
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{{- range $i, $subCmd := .SubCommands }}
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{{ if not $subCmd.Hidden }} {{ $subCmd.Name }} {{ $subCmd.Description }}{{end}}{{end}}
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{{end}}
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{{- if .Flags }}
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Flag's usage: {{ .Cmd.Name }} [--flag=flag_argument] [-f [flag_argument]] # set flag_argument to flag(s)
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or: {{ .Cmd.Name }} [--flag[=true|false| ]] [-f [true|false| ]] # set true/false to boolean flag(s)
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Flags:
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{{- range $i, $flag := .Flags }}
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--{{ SliceIndexN $flag.Name }} {{if ne $flag.Name "global.sendanonymoususage"}}(Default: "{{ $flag.Default}}"){{end}}
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{{if $flag.Description }} {{ wrapWith 80 "\n\t\t" $flag.Description }}
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{{else}}
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{{- end}}
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{{- end}}
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{{- end}}
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`
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func isHelp(args []string) bool {
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for _, name := range args {
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if name == "--help" || name == "-help" || name == "-h" {
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return true
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}
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}
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return false
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}
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// PrintHelp prints the help for the command given as argument.
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func PrintHelp(w io.Writer, cmd *Command) error {
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var flags []parser.Flat
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if cmd.Configuration != nil {
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generator.Generate(cmd.Configuration)
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var err error
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flags, err = flag.Encode(cmd.Configuration)
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if err != nil {
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return err
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}
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}
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model := map[string]interface{}{
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"Cmd": cmd,
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"Flags": flags,
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"SubCommands": cmd.subCommands,
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}
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funcs := sprig.TxtFuncMap()
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funcs["SliceIndexN"] = sliceIndexN
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tmpl, err := template.New("flags").
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Funcs(funcs).
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Parse(tmplHelp)
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if err != nil {
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return err
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}
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tw := tabwriter.NewWriter(w, 4, 0, 4, ' ', 0)
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err = tmpl.Execute(tw, model)
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if err != nil {
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return err
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}
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return tw.Flush()
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}
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func sliceIndexN(flag string) string {
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return strings.ReplaceAll(flag, "[0]", "[n]")
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}
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