From cd3706d7c5e03af13e8fb396b483d3522f8ac91c Mon Sep 17 00:00:00 2001
From: Amine Hilaly <hilalyamine@gmail.com>
Date: Fri, 25 Jun 2021 18:58:45 +0200
Subject: [PATCH] Copy `generator.yaml` to apis/version directory

Adding some logic to create copies of the `generator.yaml` within the
apis versions directories. These generator.yaml files we be reused by
the conversion webhook generator to understand the difference between
each two different API versions.

This patch Also adds a new utility function to copy files from a
source to a destination path.
---
 cmd/ack-generate/command/apis.go | 15 ++++++++++++++-
 pkg/util/file.go                 | 32 +++++++++++++++++++++++++++++++-
 2 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/cmd/ack-generate/command/apis.go b/cmd/ack-generate/command/apis.go
index 435a7955..0c73f55b 100644
--- a/cmd/ack-generate/command/apis.go
+++ b/cmd/ack-generate/command/apis.go
@@ -24,6 +24,7 @@ import (
 	generate "github.com/aws-controllers-k8s/code-generator/pkg/generate"
 	ackgenerate "github.com/aws-controllers-k8s/code-generator/pkg/generate/ack"
 	"github.com/aws-controllers-k8s/code-generator/pkg/model"
+	"github.com/aws-controllers-k8s/code-generator/pkg/util"
 )
 
 type contentType int
@@ -65,7 +66,19 @@ func saveGeneratedMetadata(cmd *cobra.Command, args []string) error {
 		optAWSSDKGoVersion,
 		optGeneratorConfigPath,
 	)
-	return err
+	if err != nil {
+		return fmt.Errorf("cannot create generation metadata file: %v", err)
+	}
+
+	copyDest := filepath.Join(
+		optOutputPath, "apis", optGenVersion, "generator.yaml",
+	)
+	err = util.CopyFile(optGeneratorConfigPath, copyDest)
+	if err != nil {
+		return fmt.Errorf("cannot copy generator configuration file: %v", err)
+	}
+
+	return nil
 }
 
 // generateAPIs generates the Go files for each resource in the AWS service
diff --git a/pkg/util/file.go b/pkg/util/file.go
index aaa4ae41..f3567cf8 100644
--- a/pkg/util/file.go
+++ b/pkg/util/file.go
@@ -13,10 +13,40 @@
 
 package util
 
-import "os"
+import (
+	"io"
+	"os"
+)
 
 // FileExists returns True if the supplied file path exists, false otherwise
 func FileExists(path string) bool {
 	_, err := os.Stat(path)
 	return !os.IsNotExist(err)
 }
+
+// CopyFile copies a file from a source path to a destination path.
+func CopyFile(src, dest string) error {
+	srcFile, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer srcFile.Close()
+
+	destFile, err := os.Create(dest)
+	if err != nil {
+		return err
+	}
+	defer destFile.Close()
+
+	_, err = io.Copy(destFile, srcFile)
+	if err != nil {
+		return err
+	}
+
+	err = destFile.Sync()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}