flannel/vendor/k8s.io/kubernetes/pkg/util/env/env.go

/*
Copyright 2015 The Kubernetes Authors.

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 env

import (
	"os"
	"strconv"
)

func GetEnvAsStringOrFallback(key, defaultValue string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return defaultValue
}

func GetEnvAsIntOrFallback(key string, defaultValue int) (int, error) {
	if v := os.Getenv(key); v != "" {
		value, err := strconv.Atoi(v)
		if err != nil {
			return defaultValue, err
		}
		return value, nil
	}
	return defaultValue, nil
}

func GetEnvAsFloat64OrFallback(key string, defaultValue float64) (float64, error) {
	if v := os.Getenv(key); v != "" {
		value, err := strconv.ParseFloat(v, 64)
		if err != nil {
			return defaultValue, err
		}
		return value, nil
	}
	return defaultValue, nil
}