code generation move to internal/code-generator

internal/code-generator/generator/generator.go

@@ -0,0 +1,34 @@
+package generator
+
+import (
+	"go/format"
+	"io/ioutil"
+)
+
+// Func is the function's type that generate the files from templates.
+type Func func(dataToParse []byte, templatePath string, template string, commit string) ([]byte, error)
+
+// FromFile read data to parse from a file named fileToParse and write the generated source code to a file named outPath. The generated
+// source code is formated with gofmt and tagged with commit.
+func FromFile(fileToParse, outPath, tmplPath, tmplName, commit string, generate Func) error {
+	buf, err := ioutil.ReadFile(fileToParse)
+	if err != nil {
+		return err
+	}
+
+	source, err := generate(buf, tmplPath, tmplName, commit)
+	if err != nil {
+		return err
+	}
+
+	formatedSource, err := format.Source(source)
+	if err != nil {
+		return err
+	}
+
+	if err := ioutil.WriteFile(outPath, formatedSource, 0666); err != nil {
+		return err
+	}
+
+	return nil
+}