Official Go implementation of the Ethereum protocol
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go-ethereum/internal/flags/helpers.go

153 lines
4.4 KiB

// Copyright 2020 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package flags
import (
"os"
"path/filepath"
"github.com/ethereum/go-ethereum/params"
"gopkg.in/urfave/cli.v1"
)
var (
CommandHelpTemplate = `{{.cmd.Name}}{{if .cmd.Subcommands}} command{{end}}{{if .cmd.Flags}} [command options]{{end}} {{.cmd.ArgsUsage}}
{{if .cmd.Description}}{{.cmd.Description}}
{{end}}{{if .cmd.Subcommands}}
SUBCOMMANDS:
{{range .cmd.Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
{{end}}{{end}}{{if .categorizedFlags}}
{{range $idx, $categorized := .categorizedFlags}}{{$categorized.Name}} OPTIONS:
{{range $categorized.Flags}}{{"\t"}}{{.}}
{{end}}
{{end}}{{end}}`
OriginCommandHelpTemplate = `{{.Name}}{{if .Subcommands}} command{{end}}{{if .Flags}} [command options]{{end}} {{.ArgsUsage}}
{{if .Description}}{{.Description}}
{{end}}{{if .Subcommands}}
SUBCOMMANDS:
{{range .Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
{{end}}{{end}}{{if .Flags}}
OPTIONS:
{{range $.Flags}} {{.}}
{{end}}
{{end}}`
// AppHelpTemplate is the test template for the default, global app help topic.
AppHelpTemplate = `NAME:
{{.App.Name}} - {{.App.Usage}}
Copyright 2013-2022 The go-ethereum Authors
USAGE:
{{.App.HelpName}} [options]{{if .App.Commands}} [command] [command options]{{end}} {{if .App.ArgsUsage}}{{.App.ArgsUsage}}{{else}}[arguments...]{{end}}
{{if .App.Version}}
VERSION:
{{.App.Version}}
{{end}}{{if len .App.Authors}}
AUTHOR(S):
{{range .App.Authors}}{{ . }}{{end}}
{{end}}{{if .App.Commands}}
COMMANDS:
{{range .App.Commands}}{{join .Names ", "}}{{ "\t" }}{{.Usage}}
{{end}}{{end}}{{if .FlagGroups}}
{{range .FlagGroups}}{{.Name}} OPTIONS:
{{range .Flags}}{{.}}
{{end}}
{{end}}{{end}}{{if .App.Copyright }}
COPYRIGHT:
{{.App.Copyright}}
{{end}}
`
// ClefAppHelpTemplate is the template for the default, global app help topic.
ClefAppHelpTemplate = `NAME:
{{.App.Name}} - {{.App.Usage}}
Copyright 2013-2022 The go-ethereum Authors
USAGE:
{{.App.HelpName}} [options]{{if .App.Commands}} command [command options]{{end}} {{if .App.ArgsUsage}}{{.App.ArgsUsage}}{{else}}[arguments...]{{end}}
{{if .App.Version}}
COMMANDS:
{{range .App.Commands}}{{join .Names ", "}}{{ "\t" }}{{.Usage}}
{{end}}{{end}}{{if .FlagGroups}}
{{range .FlagGroups}}{{.Name}} OPTIONS:
{{range .Flags}}{{.}}
{{end}}
{{end}}{{end}}{{if .App.Copyright }}
COPYRIGHT:
{{.App.Copyright}}
{{end}}
`
)
// HelpData is a one shot struct to pass to the usage template
type HelpData struct {
App interface{}
FlagGroups []FlagGroup
}
// FlagGroup is a collection of flags belonging to a single topic.
type FlagGroup struct {
Name string
Flags []cli.Flag
}
// ByCategory sorts an array of FlagGroup by Name in the order
// defined in AppHelpFlagGroups.
type ByCategory []FlagGroup
func (a ByCategory) Len() int { return len(a) }
func (a ByCategory) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByCategory) Less(i, j int) bool {
iCat, jCat := a[i].Name, a[j].Name
iIdx, jIdx := len(a), len(a) // ensure non categorized flags come last
for i, group := range a {
if iCat == group.Name {
iIdx = i
}
if jCat == group.Name {
jIdx = i
}
}
return iIdx < jIdx
}
func FlagCategory(flag cli.Flag, flagGroups []FlagGroup) string {
for _, category := range flagGroups {
for _, flg := range category.Flags {
if flg.GetName() == flag.GetName() {
return category.Name
}
}
}
return "MISC"
}
// NewApp creates an app with sane defaults.
func NewApp(gitCommit, gitDate, usage string) *cli.App {
app := cli.NewApp()
app.EnableBashCompletion = true
app.Name = filepath.Base(os.Args[0])
app.Author = ""
app.Email = ""
app.Version = params.VersionWithCommit(gitCommit, gitDate)
app.Usage = usage
return app
}