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+;;; guix.scm --- Guix package for Emacs-YouTube-stream
+
+;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
+
+;; This file is part of Emacs-YouTube-stream.
+
+;; Emacs-YouTube-stream 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.
+;;
+;; Emacs-YouTube-stream 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 Emacs-YouTube-stream.
+;; If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file contains Guix package for development version of
+;; Emacs-YouTube-stream.  To build or install, run:
+;;
+;;   guix build --file=guix.scm
+;;   guix package --install-from-file=guix.scm
+
+;; The main purpose of this file though is to make a development
+;; environment for building Emacs-YouTube-stream:
+;;
+;;   guix environment --pure --load=guix.scm
+
+;;; Code:
+
+(use-modules ((guix licenses) #:prefix license:)
+             (guix build utils)
+             (guix build-system emacs)
+             (guix gexp)
+             (guix git-download)
+             (guix packages)
+             (ice-9 popen)
+             (ice-9 rdelim))
+
+(define %source-dir (dirname (current-filename)))
+
+(define (git-output . args)
+  "Execute 'git ARGS ...' command and return its output without trailing
+newspace."
+  (with-directory-excursion %source-dir
+    (let* ((port   (apply open-pipe* OPEN_READ "git" args))
+           (output (read-string port)))
+      (close-port port)
+      (string-trim-right output #\newline))))
+
+(define (current-commit)
+  (git-output "log" "-n" "1" "--pretty=format:%H"))
+
+(define emacs-youtube-stream
+  (let ((commit (current-commit)))
+    (package
+      (name "emacs-youtube-stream")
+      (version (string-append "0.0.1" "-" (string-take commit 7)))
+      (source (local-file %source-dir
+                          #:recursive? #t
+                          #:select? (git-predicate %source-dir)))
+      (build-system emacs-build-system)
+      (home-page "https://github.com/wigust/emacs-youtube-stream")
+      (synopsis "Open YouTube stream video and live chat")
+      (description "This package provides an Emacs function to open
+YouTube video and live chat in preferred programs.")
+      (license license:gpl3+))))
+
+emacs-youtube-stream
+
+;;; guix.scm ends here