gnu: Add screenfetch.

* gnu/packages/admin.scm (screenfetch): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/admin.scm

@@ -25,6 +25,7 @@
 ;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2019 Brett Gilio <brettg@posteo.net>
 ;;; Copyright © 2019 Björn Höfling <bjoern.hoefling@bjoernhoefling.de>
+;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.lonestar.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -55,6 +56,7 @@
   #:use-module (guix build-system python)
   #:use-module (guix build-system trivial)
   #:use-module (gnu packages)
+  #:use-module (gnu packages algebra)
   #:use-module (gnu packages base)
   #:use-module (gnu packages bash)
   #:use-module (gnu packages check)
@@ -2751,6 +2753,64 @@ used in screenshots to show other users what operating system or distribution
 you are running, what theme or icon set you are using, etc.")
     (license license:expat)))
 
+(define-public screenfetch
+  ;; First commit supporting current Guix System.
+  (let ((commit "e3ec82dd464e81e4d10bef218b3016e3044c766c"))
+    (package
+      (name "screenfetch")
+      (version (git-version "3.8.0" "1" commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/KittyKatt/screenFetch")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "1lzs1l5xgj9mn4b59lhkfgqnyiivf8svd1iwjabzrax90rdmxfwj"))))
+      (build-system trivial-build-system)
+      (arguments
+       `(#:modules ((guix build utils))
+         #:builder
+         (begin
+           (use-modules (guix build utils))
+           (let ((source (assoc-ref %build-inputs "source"))
+                 (out    (assoc-ref %outputs "out")))
+             (mkdir-p (string-append out "/bin/"))
+             (copy-file (string-append source "/screenfetch-dev")
+                        (string-append out "/bin/screenfetch"))
+             (install-file (string-append source "/screenfetch.1")
+                           (string-append out "/man/man1/"))
+             (install-file (string-append source "/COPYING")
+                           (string-append out "/share/doc/" ,name "-" ,version))
+             (substitute* (string-append out "/bin/screenfetch")
+               (("/usr/bin/env bash")
+                (string-append (assoc-ref %build-inputs "bash")
+                               "/bin/bash")))
+             (wrap-program
+               (string-append out "/bin/screenfetch")
+               `("PATH" ":" prefix
+                 (,(string-append (assoc-ref %build-inputs "bc") "/bin:"
+                                  (assoc-ref %build-inputs "scrot") "/bin:"
+                                  (assoc-ref %build-inputs "xdpyinfo") "/bin"
+                                  (assoc-ref %build-inputs "xprop") "/bin"))))
+             (substitute* (string-append out "/bin/screenfetch")
+               (("#!#f")
+                (string-append "#!" (assoc-ref %build-inputs "bash")
+                               "/bin/bash")))))))
+      (inputs
+       `(("bash" ,bash)
+         ("bc" ,bc)
+         ("scrot" ,scrot)
+         ("xdpyinfo" ,xdpyinfo)
+         ("xprop" ,xprop)))
+      (home-page "https://github.com/KittyKatt/screenFetch")
+      (synopsis "System information script")
+      (description "Bash screenshot information tool which can be used to
+generate those nifty terminal theme information and ASCII distribution logos in
+everyone's screenshots nowadays.")
+      (license license:gpl3))))
+
 (define-public nnn
   (package
     (name "nnn")