traefik/integration/vendor/github.com/docker/libcompose/lookup/simple_env.go

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2017-02-07 21:33:23 +00:00
package lookup
import (
"fmt"
"os"
"github.com/docker/libcompose/config"
)
// OsEnvLookup is a "bare" structure that implements the project.EnvironmentLookup interface
type OsEnvLookup struct {
}
// Lookup creates a string slice of string containing a "docker-friendly" environment string
// in the form of 'key=value'. It gets environment values using os.Getenv.
// If the os environment variable does not exists, the slice is empty. serviceName and config
// are not used at all in this implementation.
func (o *OsEnvLookup) Lookup(key, serviceName string, config *config.ServiceConfig) []string {
ret := os.Getenv(key)
if ret == "" {
return []string{}
}
return []string{fmt.Sprintf("%s=%s", key, ret)}
}