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Add Destination field to TimestampFlag

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Adds a `Destination` field for the `TimestampFlag` type that allows you to specify a pointer to
a `Timestamp` rather than having to grab the `Timestamp` from the `cli.Context` using the flag
name.
This commit is contained in:
David Bond 2021-03-07 03:36:56 +00:00
parent 13ded1e7c4
commit f2bed637fd
No known key found for this signature in database
GPG Key ID: A35B34F344ED7AFE
3 changed files with 24 additions and 9 deletions
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12
flag_test.go
View File

@ -1973,3 +1973,15 @@ func TestTimestampFlagApply_Fail_Parse_Wrong_Time(t *testing.T) {
err := set.Parse([]string{"--time", "2006-01-02T15:04:05Z"})
expect(t, err, fmt.Errorf("invalid value \"2006-01-02T15:04:05Z\" for flag -time: parsing time \"2006-01-02T15:04:05Z\" as \"Jan 2, 2006 at 3:04pm (MST)\": cannot parse \"2006-01-02T15:04:05Z\" as \"Jan\""))
}
func TestTimestampFlagApply_WithDestination(t *testing.T) {
var destination Timestamp
expectedResult, _ := time.Parse(time.RFC3339, "2006-01-02T15:04:05Z")
fl := TimestampFlag{Name: "time", Aliases: []string{"t"}, Layout: time.RFC3339, Destination: &destination}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{"--time", "2006-01-02T15:04:05Z"})
expect(t, err, nil)
expect(t, *fl.Destination.timestamp, expectedResult)
}

10
flag_timestamp.go
View File

@ -71,6 +71,7 @@ type TimestampFlag struct {
Value *Timestamp
DefaultText string
HasBeenSet bool
Destination *Timestamp
}
// IsSet returns whether or not the flag has been set through env or file
@ -123,6 +124,10 @@ func (f *TimestampFlag) Apply(set *flag.FlagSet) error {
}
f.Value.SetLayout(f.Layout)
if f.Destination != nil {
f.Destination.SetLayout(f.Layout)
}
if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
if err := f.Value.Set(val); err != nil {
return fmt.Errorf("could not parse %q as timestamp value for flag %s: %s", val, f.Name, err)
@ -131,6 +136,11 @@ func (f *TimestampFlag) Apply(set *flag.FlagSet) error {
}
for _, name := range f.Names() {
if f.Destination != nil {
set.Var(f.Destination, name, f.Usage)
continue
}
set.Var(f.Value, name, f.Usage)
}
return nil

11
helpers_test.go
View File

@ -3,24 +3,17 @@ package cli
import (
"os"
"reflect"
"runtime"
"strings"
"testing"
)
var (
wd, _ = os.Getwd()
)
func init() {
_ = os.Setenv("CLI_TEMPLATE_REPANIC", "1")
}
func expect(t *testing.T, a interface{}, b interface{}) {
_, fn, line, _ := runtime.Caller(1)
fn = strings.Replace(fn, wd+"/", "", -1)
t.Helper()
if !reflect.DeepEqual(a, b) {
t.Errorf("(%s:%d) Expected %v (type %v) - Got %v (type %v)", fn, line, b, reflect.TypeOf(b), a, reflect.TypeOf(a))
t.Errorf("Expected %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
}
}