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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