Method upload

internal/attachments/client.go:110–116

upload sends the file's bytes and returns the asset URL to reference from the markdown.

(ctx context.Context, a UserAsset)

// upload sends the file's bytes and returns the asset URL to reference
// from the markdown.
func (u *Uploader) upload(ctx context.Context, a UserAsset) (string, error) {
	assetURL, err := u.postAsset(ctx, a.getAsset())
	if err != nil {
		return "", newUploadError(err, a)
	}
	return assetURL, nil
}

// openFile is indirected so tests can stub file opening.
var openFile = func(path string) (io.ReadCloser, error) {