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env_tags.go
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/
env_tags.go
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// Copyright 2021 iLogtail 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 helper
import (
"os"
"strings"
"sync"
)
const defaultEnvTagKeys = "ALIYUN_LOG_ENV_TAGS"
// EnvTags to be add to every logroup
var EnvTags []string
var envTagsLock sync.RWMutex
// LoadEnvTags load tags from env
func LoadEnvTags() {
envTagsLock.Lock() // Lock for writing
defer envTagsLock.Unlock()
envTagKeys := os.Getenv(defaultEnvTagKeys)
if len(envTagKeys) == 0 || len(EnvTags) > 0 {
return
}
for _, envKey := range strings.Split(envTagKeys, "|") {
EnvTags = append(EnvTags, envKey)
EnvTags = append(EnvTags, os.Getenv(envKey))
}
}
// HasEnvTags check if specific tags exist in envTags
func HasEnvTags(tagKey string, tagValue string) bool {
envTagsLock.RLock() // Lock for reading
defer envTagsLock.RUnlock()
for i := 0; i < len(EnvTags)-1; i += 2 {
if EnvTags[i] == tagKey && EnvTags[i+1] == tagValue {
return true
}
}
return false
}
func init() {
LoadEnvTags()
}