Move debugd config to separate file

Signed-off-by: Malte Poll <mp@edgeless.systems>

debugd/cdbg/config/config.go

@@ -1,18 +1,18 @@
 package config
 
 import (
+	"errors"
 	"fmt"
+	"io/fs"
 
 	"github.com/edgelesssys/constellation/cli/file"
 	"github.com/edgelesssys/constellation/debugd/debugd/deploy"
 	"github.com/edgelesssys/constellation/debugd/ssh"
-	configc "github.com/edgelesssys/constellation/internal/config"
 )
 
-// CDBGConfig describes the constellation-cli config file and extends it with a new field "cdbg".
+// CDBGConfig describes the constellation-cli config file.
 type CDBGConfig struct {
 	ConstellationDebugConfig ConstellationDebugdConfig `yaml:"cdbg"`
-	configc.Config
 }
 
 // ConstellationDebugdConfig is the cdbg specific configuration.
@@ -22,27 +22,13 @@ type ConstellationDebugdConfig struct {
 	SystemdUnits    []deploy.SystemdUnit `yaml:"systemdUnits,omitempty"`
 }
 
-// Default returns a struct with the default config.
-func Default() *CDBGConfig {
-	return &CDBGConfig{
-		ConstellationDebugConfig: ConstellationDebugdConfig{
-			AuthorizedKeys:  []ssh.SSHKey{},
-			CoordinatorPath: "coordinator",
-			SystemdUnits:    []deploy.SystemdUnit{},
-		},
-		Config: *configc.Default(),
-	}
-}
-
-// FromFile returns a default config that has been merged with a config file.
-// If name is empty, the defaults are returned.
+// FromFile reads a debug configuration.
 func FromFile(fileHandler file.Handler, name string) (*CDBGConfig, error) {
-	conf := Default()
-	if name == "" {
-		return conf, nil
-	}
-
+	conf := &CDBGConfig{}
 	if err := fileHandler.ReadYAML(name, conf); err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			return nil, fmt.Errorf("unable to find %s - consult the README on how to setup cdbg", name)
+		}
 		return nil, fmt.Errorf("could not load config from file %s: %w", name, err)
 	}
 	return conf, nil