/
intsliceflag.go
48 lines (43 loc) · 1.32 KB
/
intsliceflag.go
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// Copyright 2018 Google Inc. All Rights Reserved.
//
// 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 settings provides a central interface to webborer settings.
package settings
import (
"fmt"
"strconv"
"strings"
)
// IntSliceFlag is a flag.Value that takes a comma-separated string and turns
// it into a slice of ints.
type IntSliceFlag []int
func (f *IntSliceFlag) String() string {
if f == nil {
return ""
}
tmpslice := []string{}
for _, v := range *f {
tmpslice = append(tmpslice, strconv.Itoa(v))
}
return strings.Join(tmpslice, ",")
}
func (f *IntSliceFlag) Set(value string) error {
for _, v := range strings.Split(value, ",") {
if i, err := strconv.Atoi(strings.TrimSpace(v)); err == nil {
*f = append(*f, i)
} else {
return fmt.Errorf("Unable to parse %s as int.", v)
}
}
return nil
}