feat: input and output file

types.go

@@ -1,6 +1,11 @@
 package main
 
-import "encoding/json"
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"text/template"
+)
 
 type TemplateMeta struct {
 	Output string               `yaml:"output"`
@@ -15,6 +20,19 @@ func (meta TemplateMeta) String() string {
 	return string(data)
 }
 
+func (meta TemplateMeta) OutputFile(ctx TemplateContext) (output string, err error) {
+	tmpl, err := template.New("output").Parse(meta.Output)
+	if err != nil {
+		return "", fmt.Errorf("Failed to parse output name: %w", err)
+	}
+	var buf bytes.Buffer
+	err = tmpl.Execute(&buf, ctx)
+	if err != nil {
+		return "", fmt.Errorf("Failed to execute output name: %w", err)
+	}
+	return buf.String(), nil
+}
+
 type ParamSpec struct {
 	Required bool   `yaml:"required"`
 	Default  string `yaml:"default"`