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parse.go
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parse.go
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package zcli
import (
"flag"
"fmt"
"os"
"strings"
"github.com/sohaha/zlsgo/zarray"
"github.com/sohaha/zlsgo/ztype"
)
func parse(outHelp bool) {
parseCommand(outHelp)
parseSubcommand(flag.Args())
}
func parseRequiredFlags(fs *flag.FlagSet, requiredFlags RequiredFlags) (err error) {
requiredFlagsLen := len(requiredFlags)
if requiredFlagsLen > 0 {
flagMap := zarray.New(requiredFlagsLen)
for _, flagName := range requiredFlags {
flagMap.Push(flagName)
}
fs.Visit(func(f *flag.Flag) {
Log.Error(f.Name)
_, _ = flagMap.RemoveValue(f.Name)
})
flagMapLen := flagMap.Length()
if flagMapLen > 0 && !*flagHelp {
arr := make([]string, flagMapLen)
for i := 0; i < flagMapLen; i++ {
value, _ := flagMap.Get(i)
arr[i] = "-" + ztype.ToString(value)
}
err = fmt.Errorf("required flags: %s", strings.Join(arr, ", "))
}
}
return
}
// Parse Parse
func Parse(arg ...[]string) {
if Version != "" {
flagVersion = SetVar("version", GetLangText("version")).short("V").Bool()
}
var argsData []string
if len(arg) == 1 {
argsData = arg[0]
} else {
argsData = os.Args[1:]
}
for k := range argsData {
s := argsData[k]
if len(s) < 2 || s[0] != '-' {
continue
}
var prefix = "-"
if s[1] == '-' {
s = s[2:]
prefix = "--"
} else {
s = s[1:]
}
for key := range varsKey {
if key == s {
argsData[k] = prefix + cliPrefix + s
}
}
}
if len(argsData) > 0 && argsData[0][0] != '-' {
parseSubcommand(argsData)
matchingCmd.command.Run(args)
osExit(0)
}
_ = flag.CommandLine.Parse(argsData)
var v *bool
var ok bool
if v, ok = ShortValues["V"].(*bool); ok && *v {
*flagVersion = *v
}
if *flagVersion {
showVersionNum(*v)
osExit(0)
return
}
}
func parseCommand(outHelp bool) {
Parse()
if len(cmds) < 1 {
return
}
flag.Usage = usage
requiredErr := parseRequiredFlags(flag.CommandLine, requiredFlags)
if requiredErr != nil {
if len(flag.Args()) > 0 {
Error(requiredErr.Error())
} else if outHelp {
Help()
}
}
if flag.NArg() < 1 {
if outHelp {
Help()
}
return
}
}
func parseSubcommand(Args []string) {
var name = ""
if len(Args) > 0 {
name = Args[0]
}
if cont, ok := cmds[name]; ok {
matchingCmd = cont
FirstParameter += " " + name
fsArgs := Args[1:]
fs := flag.NewFlagSet(name, flag.ExitOnError)
flag.CommandLine = fs
subcommand := &Subcommand{
Name: cont.name,
Desc: cont.desc,
Supplement: cont.Supplement,
Parameter: FirstParameter,
CommandLine: fs,
}
cont.command.Flags(subcommand)
fs.SetOutput(&errWrite{})
fs.Usage = func() {
Log.Printf("%s\n", subcommand.Desc)
if subcommand.Supplement != "" {
Log.Printf("%s\n", subcommand.Supplement)
}
Log.Printf("\nusage of %s\n", subcommand.Parameter)
ShowFlags(fs)
ShowRequired(fs, cont.requiredFlags)
}
_ = fs.Parse(fsArgs)
args = fs.Args()
argsIsHelp(args)
flagMap := zarray.New(len(cont.requiredFlags))
for _, flagName := range cont.requiredFlags {
flagMap.Push(flagName)
}
fs.Visit(func(f *flag.Flag) {
_, _ = flagMap.RemoveValue(f.Name)
})
flagMapLen := flagMap.Length()
if flagMapLen > 0 && !*flagHelp {
arr := make([]string, flagMapLen)
for i := 0; i < flagMapLen; i++ {
value, _ := flagMap.Get(i)
arr[i] = "-" + ztype.ToString(value)
}
Error("required flags: %s", strings.Join(arr, ", "))
}
} else if name != "" {
unknownCommandFn(name)
osExit(1)
}
}