Add docker configuration

oni-docker.el

@@ -0,0 +1,32 @@
+;;; oni-docker.el --- Configuration for working with Docker  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020  Tom Willemse
+
+;; Author: Tom Willemse <tom@ryuslash.org>
+;; Keywords: local
+;; Version: 2020.0107.223729
+;; Package-Requires: (dockerfile-mode)
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Configuration for working with Dockers.
+
+;;; Code:
+
+;;;###autoload(with-eval-after-load 'dockerfile-mode (require 'oni-docker))
+
+(provide 'oni-docker)
+;;; oni-docker.el ends here

test/integration/oni-docker.bats

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+#!/usr/bin/env bats
+
+@test "Loading a Dockerfile loads oni-docker" {
+    run emacs -batch -l package -f package-initialize \
+        -visit Dockerfile \
+        -eval "(prin1 (featurep 'oni-docker))"
+
+    [ "$output" = "t" ]
+}