mirror of https://github.com/XTLS/Xray-core
132 lines
3.4 KiB
Go
132 lines
3.4 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Package base defines shared basic pieces of the commands,
|
|
// in particular logging and the Command structure.
|
|
package base
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
"sync"
|
|
)
|
|
|
|
// A Command is an implementation of a xray command
|
|
// like xray run or xray version.
|
|
type Command struct {
|
|
// Run runs the command.
|
|
// The args are the arguments after the command name.
|
|
Run func(cmd *Command, args []string)
|
|
|
|
// UsageLine is the one-line usage message.
|
|
// The words between the first word (the "executable name") and the first flag or argument in the line are taken to be the command name.
|
|
//
|
|
// UsageLine supports go template syntax. It's recommended to use "{{.Exec}}" instead of hardcoding name
|
|
UsageLine string
|
|
|
|
// Short is the short description shown in the 'go help' output.
|
|
//
|
|
// Note: Short does not support go template syntax.
|
|
Short string
|
|
|
|
// Long is the long message shown in the 'go help <this-command>' output.
|
|
//
|
|
// Long supports go template syntax. It's recommended to use "{{.Exec}}", "{{.LongName}}" instead of hardcoding strings
|
|
Long string
|
|
|
|
// Flag is a set of flags specific to this command.
|
|
Flag flag.FlagSet
|
|
|
|
// CustomFlags indicates that the command will do its own
|
|
// flag parsing.
|
|
CustomFlags bool
|
|
|
|
// Commands lists the available commands and help topics.
|
|
// The order here is the order in which they are printed by 'go help'.
|
|
// Note that subcommands are in general best avoided.
|
|
Commands []*Command
|
|
}
|
|
|
|
// LongName returns the command's long name: all the words in the usage line between first word (e.g. "xray") and a flag or argument,
|
|
func (c *Command) LongName() string {
|
|
name := c.UsageLine
|
|
if i := strings.Index(name, " ["); i >= 0 {
|
|
name = strings.TrimSpace(name[:i])
|
|
}
|
|
if i := strings.Index(name, " "); i >= 0 {
|
|
name = name[i+1:]
|
|
} else {
|
|
name = ""
|
|
}
|
|
return strings.TrimSpace(name)
|
|
}
|
|
|
|
// Name returns the command's short name: the last word in the usage line before a flag or argument.
|
|
func (c *Command) Name() string {
|
|
name := c.LongName()
|
|
if i := strings.LastIndex(name, " "); i >= 0 {
|
|
name = name[i+1:]
|
|
}
|
|
return strings.TrimSpace(name)
|
|
}
|
|
|
|
// Usage prints usage of the Command
|
|
func (c *Command) Usage() {
|
|
buildCommandText(c)
|
|
fmt.Fprintf(os.Stderr, "usage: %s\n", c.UsageLine)
|
|
fmt.Fprintf(os.Stderr, "Run 'xray help %s' for details.\n", c.LongName())
|
|
SetExitStatus(2)
|
|
Exit()
|
|
}
|
|
|
|
// Runnable reports whether the command can be run; otherwise
|
|
// it is a documentation pseudo-command such as importpath.
|
|
func (c *Command) Runnable() bool {
|
|
return c.Run != nil
|
|
}
|
|
|
|
// Exit exits with code set with SetExitStatus()
|
|
func Exit() {
|
|
os.Exit(exitStatus)
|
|
}
|
|
|
|
// Fatalf logs error and exit with code 1
|
|
func Fatalf(format string, args ...interface{}) {
|
|
Errorf(format, args...)
|
|
Exit()
|
|
}
|
|
|
|
// Errorf logs error and set exit status to 1, but not exit
|
|
func Errorf(format string, args ...interface{}) {
|
|
fmt.Fprintf(os.Stderr, format, args...)
|
|
fmt.Fprintln(os.Stderr)
|
|
SetExitStatus(1)
|
|
}
|
|
|
|
// ExitIfErrors exits if current status is not zero
|
|
func ExitIfErrors() {
|
|
if exitStatus != 0 {
|
|
Exit()
|
|
}
|
|
}
|
|
|
|
var exitStatus = 0
|
|
var exitMu sync.Mutex
|
|
|
|
// SetExitStatus set exit status code
|
|
func SetExitStatus(n int) {
|
|
exitMu.Lock()
|
|
if exitStatus < n {
|
|
exitStatus = n
|
|
}
|
|
exitMu.Unlock()
|
|
}
|
|
|
|
// GetExitStatus get exit status code
|
|
func GetExitStatus() int {
|
|
return exitStatus
|
|
}
|