gnu: Add gpredict.

* gnu/packages/astronomy.scm (gpredict): New variable.

gnu/packages/astronomy.scm

@@ -4,6 +4,7 @@
 ;;; Copyright © 2018, 2019 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2019 by Amar Singh <nly@disroot.org>
 ;;; Copyright © 2020 R Veera Kumar <vkor@vkten.in>
+;;; Copyright © 2020 Guillaume Le Vaillant <glv@posteo.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -28,6 +29,8 @@
   #:use-module (guix utils)
   #:use-module (gnu packages)
   #:use-module (gnu packages autotools)
+  #:use-module (gnu packages curl)
+  #:use-module (gnu packages glib)
   #:use-module (gnu packages image)
   #:use-module (gnu packages compression)
   #:use-module (gnu packages fontutils)
@@ -344,3 +347,45 @@ All of the major planets and most satellites can be drawn and different map
 projections are also supported, including azimuthal, hemisphere, Lambert,
 Mercator, Mollweide, Peters, polyconic, orthographic and rectangular.")
     (license license:gpl2+)))
+
+(define-public gpredict
+  (package
+    (name "gpredict")
+    (version "2.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/csete/gpredict/releases"
+                           "/download/v" version
+                           "/gpredict-" version ".tar.bz2"))
+       (sha256
+        (base32 "0hwf97kng1zy8rxyglw04x89p0bg07zq30hgghm20yxiw2xc8ng7"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("intltool" ,intltool)
+       ("gettext" ,gettext-minimal)
+       ("pkg-config" ,pkg-config)))
+    (inputs
+     `(("curl" ,curl)
+       ("glib" ,glib)
+       ("goocanvas" ,goocanvas)
+       ("gtk+" ,gtk+)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-tests
+           (lambda _
+             ;; Remove reference to non-existent file.
+             (substitute* "po/POTFILES.in"
+               (("src/gtk-sat-tree\\.c")
+                ""))
+             #t)))))
+    (synopsis "Satellite tracking and orbit prediction application")
+    (description
+     "Gpredict is a real-time satellite tracking and orbit prediction
+application.  It can track a large number of satellites and display their
+position and other data in lists, tables, maps, and polar plots (radar view).
+Gpredict can also predict the time of future passes for a satellite, and
+provide you with detailed information about each pass.")
+    (home-page "http://gpredict.oz9aec.net/index.php")
+    (license license:gpl2+)))