feat: handle []string or string for pathAlias

template/blocks_yaml.go

@@ -8,21 +8,21 @@ import (
 )
 
 type yamlBlock struct {
-	Path         string      `yaml:"path"`
-	Codec        string      `yaml:"codec"`
-	Value        any         `yaml:"value,omitempty"`
-	Fields       []yamlField `yaml:"fields"`
-	ListTemplate string      `yaml:"listTemplate,omitempty"`
-	Hidden       bool        `yaml:"hidden,omitempty"`
-	PathAlias    []string    `yaml:"pathAlias,omitempty"`
+	Path         string        `yaml:"path"`
+	Codec        string        `yaml:"codec"`
+	Value        any           `yaml:"value,omitempty"`
+	Fields       []yamlField   `yaml:"fields"`
+	ListTemplate string        `yaml:"listTemplate,omitempty"`
+	Hidden       bool          `yaml:"hidden,omitempty"`
+	PathAlias    StringOrSlice `yaml:"pathAlias,omitempty"`
 }
 
 type yamlField struct {
-	Path      string   `yaml:"path"`
-	Value     any      `yaml:"value,omitempty"`
-	Codec     string   `yaml:"codec"`
-	Hidden    bool     `yaml:"hidden,omitempty"`
-	PathAlias []string `yaml:"pathAlias,omitempty"`
+	Path      string        `yaml:"path"`
+	Value     any           `yaml:"value,omitempty"`
+	Codec     string        `yaml:"codec"`
+	Hidden    bool          `yaml:"hidden,omitempty"`
+	PathAlias StringOrSlice `yaml:"pathAlias,omitempty"`
 }
 
 func parseYamlTemplate(input Slice) (block Block, err error) {

template/yaml_types.go

@@ -0,0 +1,31 @@
+package template
+
+import "errors"
+
+type StringOrSlice []string
+
+func (s *StringOrSlice) UnmarshalYAML(unmarshal func(any) error) error {
+	var single string
+	if err := unmarshal(&single); err == nil {
+		if single == "" {
+			*s = nil
+			return nil
+		}
+		*s = []string{single}
+		return nil
+	}
+
+	var multi []string
+	if err := unmarshal(&multi); err == nil {
+		*s = multi
+		return nil
+	}
+
+	var nothing *struct{}
+	if err := unmarshal(&nothing); err == nil {
+		*s = nil
+		return nil
+	}
+
+	return errors.New("expected string, []string, or null")
+}