Added utils.go generation

internal/code-generator/generator/vendor.go

@@ -0,0 +1,37 @@
+package generator
+
+import (
+	"bytes"
+	"html/template"
+	"io"
+
+	yaml "gopkg.in/yaml.v2"
+)
+
+// Vendor reads from buf and builds utils.go file from utilsTmplPath.
+func Vendor(data []byte, uitlsTmplPath, utilsTmplName, commit string) ([]byte, error) {
+	var regexpList []string
+	if err := yaml.Unmarshal(data, &regexpList); err != nil {
+		return nil, err
+	}
+
+	buf := &bytes.Buffer{}
+	if err := executeUtilsTemplate(buf, regexpList, uitlsTmplPath, utilsTmplName, commit); err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func executeUtilsTemplate(out io.Writer, regexpList []string, languagesTmplPath, languagesTmpl, commit string) error {
+	fmap := template.FuncMap{
+		"getCommit": func() string { return commit },
+	}
+
+	t := template.Must(template.New(languagesTmpl).Funcs(fmap).ParseFiles(languagesTmplPath))
+	if err := t.Execute(out, regexpList); err != nil {
+		return err
+	}
+
+	return nil
+}