[bug#28060] [PATCH] gnu: Add emacs-nixos-mode.

[Oleg Pykhalov <go.wigust@gmail.com>]

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From 90ef6b8f1bf57820db95d7daf17f7e0fae303356 Mon Sep 17 00:00:00 2001
From: Oleg Pykhalov <go.wigust@gmail.com>
Date: Sat, 12 Aug 2017 09:48:53 +0300
Subject: [PATCH] gnu: Add emacs-nixos-mode.

* gnu/packages/emacs.scm (emacs-nixos-mode): New variable.
---
 gnu/packages/emacs.scm | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/gnu/packages/emacs.scm b/gnu/packages/emacs.scm
index bb5d2349f..adf1ef167 100644
--- a/gnu/packages/emacs.scm
+++ b/gnu/packages/emacs.scm
@@ -5331,3 +5331,29 @@ enables you to easily define search engines, bind them to keybindings, and
 query them from the comfort of your editor.")
     (home-page "https://github.com/hrs/engine-mode")
     (license license:gpl3+)))
+
+(define-public emacs-nixos-mode
+  (package
+    (name "emacs-nixos-mode")
+    (version "1.11.13")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/NixOS/nix/archive/"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "12110drl51r9bi45ql865jwvax1gladb5hfpwk0vi5bjybns6c9b"))))
+    (build-system emacs-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'chdir-elisp
+           (lambda _
+             (chdir "misc/emacs"))))))
+    (synopsis "Emacs major mode for editing Nix expressions")
+    (description "@code{nixos-mode} provides an Emacs major mode for editing
+Nix expressions.")
+    (home-page "https://github.com/NixOS/nix")
+    (license license:gpl3+)))
-- 
2.14.1