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minio/pkg/env/env.go

37 lines
1011 B

package env
import (
"os"
"strings"
)
// 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 {
if v, ok := os.LookupEnv(key); ok {
return v
}
return defaultValue
}
// Lookup 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 and the boolean is true.
// Otherwise the returned value will be empty and the boolean will
// be false.
func Lookup(key string) (string, bool) { return os.LookupEnv(key) }
// List all envs with a given prefix.
func List(prefix string) (envs []string) {
for _, env := range os.Environ() {
if strings.HasPrefix(env, prefix) {
values := strings.SplitN(env, "=", 2)
if len(values) == 2 {
envs = append(envs, values[0])
}
}
}
return envs
}