Nicer error messages

Signed-off-by: David Gageot <david.gageot@docker.com>

Author: dgageot

pkg/config/config.go

@@ -80,22 +80,22 @@ func ValidatePathInDirectory(path, allowedDir string) (string, error) {
 func loadConfig(path string) (*latest.Config, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
-		return nil, fmt.Errorf("failed to read config file: %w", err)
+		return nil, fmt.Errorf("reading config file: %w", err)
 	}
 
 	var raw map[string]any
 	if err := yaml.Unmarshal(data, &raw); err != nil {
-		return nil, fmt.Errorf("failed to parse config file %s: %w", path, err)
+		return nil, fmt.Errorf("parsing config file %s\n%s", path, yaml.FormatError(err, true, true))
 	}
 
 	oldConfig, err := parseCurrentVersion(data, raw["version"])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse config file %s: %w", path, err)
+		return nil, fmt.Errorf("parsing config file %s\n%s", path, yaml.FormatError(err, true, true))
 	}
 
 	config, err := migrateToLatestConfig(oldConfig)
 	if err != nil {
-		return nil, fmt.Errorf("failed to migrate config: %w", err)
+		return nil, fmt.Errorf("migrating config: %w", err)
 	}
 
 	if err := validateConfig(&config); err != nil {