The real

cloud.google.com/go/storage and google.golang.org/api/option packages are what production code will eventually use. But, during dev time it's nice to just write files to the hard drive of your one free tier google compute instance. You get 30 GB for free! And storing in a real bucket will cost some money.

func getStorageClient() (*filestorage.Client, string) {
	keyPath := ""
	client, err := filestorage.NewClient(context.Background(),
		option.WithCredentialsFile(keyPath))
	if err != nil {
		return nil, ""
	}
	client.BucketPath = "/bucket"
	bucket := "unique-name"
	return client, bucket
}

This is the same make client code you'll need but it's using this fake filestorage package which does everything the real client does but uses your machine's hard drive.

Write:

	client, bucket := getStorageClient()
	w := client.Bucket(bucket).Object(filename).NewWriter(context.Background())
	w.ContentType = "application/octet-stream"
	w.Write(data)
	w.Close()

Delete:

	client, bucket := getStorageClient(c)
	ctx := context.Background()
	client.Bucket(bucket).Object(object).Delete(ctx)

How much space is left:

func getAvailableDiskSpace(path string) (uint64, error) {
	var stat syscall.Statfs_t

	err := syscall.Statfs(path, &stat)
	if err != nil {
		return 0, err
	}

	availableSpace := stat.Bavail * uint64(stat.Bsize)
	return availableSpace, nil
}