traefik/pkg/cli/loader_env.go
2020-08-17 18:04:03 +02:00

31 lines
931 B
Go

package cli
import (
"fmt"
"os"
"strings"
"github.com/containous/traefik/v2/pkg/log"
"github.com/traefik/paerser/cli"
"github.com/traefik/paerser/env"
)
// EnvLoader loads a configuration from all the environment variables prefixed with "TRAEFIK_".
type EnvLoader struct{}
// Load loads the command's configuration from the environment variables.
func (e *EnvLoader) Load(_ []string, cmd *cli.Command) (bool, error) {
vars := env.FindPrefixedEnvVars(os.Environ(), env.DefaultNamePrefix, cmd.Configuration)
if len(vars) == 0 {
return false, nil
}
if err := env.Decode(vars, env.DefaultNamePrefix, cmd.Configuration); err != nil {
log.WithoutContext().Debug("environment variables", strings.Join(vars, ", "))
return false, fmt.Errorf("failed to decode configuration from environment variables: %w ", err)
}
log.WithoutContext().Println("Configuration loaded from environment variables.")
return true, nil
}