storj/cmd/uplink/stdlib_flags.go

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// Copyright (C) 2021 Storj Labs, Inc.
// See LICENSE for copying information.
package main
import (
"encoding/json"
"flag"
"time"
"github.com/zeebo/clingy"
"github.com/zeebo/errs"
)
type stdlibFlags struct {
fs *flag.FlagSet
}
func newStdlibFlags(fs *flag.FlagSet) *stdlibFlags {
return &stdlibFlags{
fs: fs,
}
}
func (s *stdlibFlags) Setup(f clingy.Flags) {
// we use the Transform function to store the value as a side
// effect so that we can return an error if one occurs through
// the expected clingy pipeline.
s.fs.VisitAll(func(fl *flag.Flag) {
name, _ := flag.UnquoteUsage(fl)
f.Flag(fl.Name, fl.Usage, fl.DefValue,
clingy.Advanced,
clingy.Type(name),
clingy.Transform(func(val string) (string, error) {
return "", fl.Value.Set(val)
}),
)
})
}
// parseHumanDate parses command-line flags which accept relative and absolute datetimes.
// It can be passed to clingy.Transform to create a clingy.Option.
func parseHumanDate(date string) (time.Time, error) {
switch {
case date == "none":
return time.Time{}, nil
case date == "":
return time.Time{}, nil
case date == "now":
return time.Now(), nil
case date[0] == '+' || date[0] == '-':
d, err := time.ParseDuration(date)
return time.Now().Add(d), errs.Wrap(err)
default:
t, err := time.Parse(time.RFC3339, date)
return t, errs.Wrap(err)
}
}
// parseJSON parses command-line flags which accept JSON string.
// It can be passed to clingy.Transform to create a clingy.Option.
func parseJSON(jsonString string) (map[string]string, error) {
if len(jsonString) > 0 {
var jsonValue map[string]string
err := json.Unmarshal([]byte(jsonString), &jsonValue)
if err != nil {
return nil, err
}
return jsonValue, nil
}
return nil, nil
}