mirror of
https://github.com/minio/minio.git
synced 2024-12-27 23:55:56 -05:00
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
|
|
//
|
|
// This file is part of MinIO Object Storage stack
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package env
|
|
|
|
import (
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
)
|
|
|
|
var (
|
|
privateMutex sync.RWMutex
|
|
lockEnvMutex sync.Mutex
|
|
envOff bool
|
|
)
|
|
|
|
// LockSetEnv locks modifications to environment.
|
|
// Call returned function to unlock.
|
|
func LockSetEnv() func() {
|
|
lockEnvMutex.Lock()
|
|
return lockEnvMutex.Unlock
|
|
}
|
|
|
|
// SetEnvOff - turns off env lookup
|
|
// A global lock above this MUST ensure that
|
|
func SetEnvOff() {
|
|
privateMutex.Lock()
|
|
defer privateMutex.Unlock()
|
|
|
|
envOff = true
|
|
}
|
|
|
|
// SetEnvOn - turns on env lookup
|
|
func SetEnvOn() {
|
|
privateMutex.Lock()
|
|
defer privateMutex.Unlock()
|
|
|
|
envOff = false
|
|
}
|
|
|
|
// IsSet returns if the given env key is set.
|
|
func IsSet(key string) bool {
|
|
_, _, _, ok := LookupEnv(key)
|
|
return ok
|
|
}
|
|
|
|
// Get retrieves the value of the environment variable named
|
|
// by the key. If the variable is present in the environment the
|
|
// value (which may be empty) is returned. Otherwise it returns
|
|
// the specified default value.
|
|
func Get(key, defaultValue string) string {
|
|
privateMutex.RLock()
|
|
ok := envOff
|
|
privateMutex.RUnlock()
|
|
if ok {
|
|
return defaultValue
|
|
}
|
|
if v, _, _, ok := LookupEnv(key); ok {
|
|
return v
|
|
}
|
|
return defaultValue
|
|
}
|
|
|
|
// GetInt returns an integer if found in the environment
|
|
// and returns the default value otherwise.
|
|
func GetInt(key string, defaultValue int) (int, error) {
|
|
v := Get(key, "")
|
|
if v == "" {
|
|
return defaultValue, nil
|
|
}
|
|
return strconv.Atoi(v)
|
|
}
|
|
|
|
// List all envs with a given prefix.
|
|
func List(prefix string) (envs []string) {
|
|
for _, env := range Environ() {
|
|
if strings.HasPrefix(env, prefix) {
|
|
values := strings.SplitN(env, "=", 2)
|
|
if len(values) == 2 {
|
|
envs = append(envs, values[0])
|
|
}
|
|
}
|
|
}
|
|
return envs
|
|
}
|