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main.go
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main.go
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/*
* Copyright (c) 2019 OysterPack, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"flag"
"fmt"
"github.com/rs/xid"
"log"
)
var id = flag.String("p", "", "parse XID")
var verbose = flag.Bool("v", false, "shows XID components (PID, Time, Counter)")
var help = flag.Bool("h", false, "prints help")
// used to generate and parse XID
//
// Command Line Flags
// -p is used to specify an XID to parse
// -v shows XID components (PID, Time, Counter)
func main() {
flag.Parse()
if *help {
fmt.Println(`xid of a tool used to generate or parse an XID (https://github.com/rs/xid)
Usage:
xid [-p XID] [-v]
when the -p flag is not specified, then it will generate a new XID
Flags:`)
flag.PrintDefaults()
return
}
if *id != "" {
parseXID(*id)
return
}
// generate a new XID
print(xid.New())
}
func parseXID(id string) {
id2, err := xid.FromString(id)
if err != nil {
log.Fatal(err)
}
print(id2)
}
func print(id xid.ID) {
if *verbose {
fmt.Printf("%v -> PID(%v) Time(%s) Counter(%d)\n", id, id.Pid(), id.Time(), id.Counter())
return
}
fmt.Println(id)
}