package clic_test

import (

"context"

"flag"

"fmt"

"log/slog"

"os"

"time"

"github.com/googollee/clic"

)

func Example() {

// structs

type Database struct {

Driver string `clic:"driver,sqlite3,the driver of the database [sqlite3,mysql,postgres]"`

URL string `clic:"url,./database.sqlite,the url of the database"`

}

type Log struct {

Level slog.Level `clic:"level,INFO,the level of the log [DEBUG,INFO,WARN,ERROR]"`

}

initLog := func(ctx context.Context, log *Log) error {

fmt.Println("set log level:", log.Level)

return nil

}

// args

oldArgs := os.Args

os.Args = []string{oldArgs[0], "-database.driver", "driver", "-database.url", "url", "sub_command"}

defer func() {

os.Args = oldArgs

}()

// main code

ctx := context.Background()

var db Database

clic.Register("database", &db)

clic.RegisterCallback("log", initLog)

// config should be finished in a minute.

configCtx, cancel := context.WithTimeout(ctx, time.Minute)

defer cancel()

clic.Parse(configCtx)

fmt.Println("database:", db)

fmt.Println("remain args:", flag.Args())

// Output:

// set log level: INFO

// database: {driver url}

// remain args: [sub_command]

}