gnu: Add nyx.

* gnu/packages/tor.scm (nyx): New variable.

gnu/packages/tor.scm

@@ -3,6 +3,7 @@
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016, 2017 ng0 <contact.ng0@cryptolab.net>
+;;; Copyright © 2017 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -227,3 +228,66 @@ (define-public onionshare
 from you.")
     (license (list license:gpl3+
                    license:bsd-3))))    ; onionshare/socks.py
+
+(define-public nyx
+  ;; The last ‘arm’ relase was 5 years ago.  Meanwhile, python3 support has
+  ;; been added and the software was renamed to ‘nyx’.
+  (let ((commit "fea209127484d9b304b908a4711c9528b1d065bc")
+        (revision "1"))                 ; Guix package revision
+    (package
+      (name "nyx")
+      (version (string-append "1.9-"
+                              revision "." (string-take commit 7)))
+      (source
+       (origin
+         (method git-fetch)
+         (file-name (string-append name "-" version "-checkout"))
+         (uri (git-reference
+               (url "https://git.torproject.org/nyx.git")
+               (commit commit)))
+         (sha256
+          (base32
+           "1g0l4988076xg5gs0x0nxzlg58rfx5g5agmklvyh4yp03vxncdb9"))))
+      (build-system python-build-system)
+      (native-inputs
+       `(("python-mock" ,python-mock)
+         ("python-pep8" ,python-pep8)
+         ("python-pyflakes" ,python-pyflakes)))
+      (inputs
+       `(("python-stem" ,python-stem)))
+      (arguments
+       `(#:configure-flags
+         (list (string-append "--man-page="
+                              (assoc-ref %outputs "out")
+                              "/share/man/man1/nyx.1")
+               (string-append "--sample-path="
+                              (assoc-ref %outputs "out")
+                              "/share/doc/nyx/nyxrc.sample"))
+         #:use-setuptools? #f           ; setup.py still uses distutils
+         #:phases
+         (modify-phases %standard-phases
+           (replace 'check
+             (lambda _
+               (zero? (system* "./run_tests.py" "--unit")))))))
+      ;; A Nyx home page is ‘being worked on’.  Use Arm's for now, which at
+      ;; least mentions the new source repository:
+      (home-page "http://www.atagar.com/arm/")
+      (synopsis "Tor relay status monitor")
+      (description "Nyx (formerly Anonymizing Relay Monitor or \"arm\")
+monitors the performance of relays participating in the
+@uref{https://www.torproject.org/, Tor anonymity network}.  It displays this
+information visually and in real time, using a curses-based terminal interface.
+This makes Nyx well-suited for remote shell connections and servers without a
+graphical display.  It's like @command{top} for Tor, providing detailed
+statistics and status reports on:
+
+@enumerate
+@item connections (with IP address, hostname, fingerprint, and consensus data),
+@item bandwidth, processor, and memory usage,
+@item the relay's current configuration,
+@item logged events,
+@item and much more.
+@end enumerate
+
+Potential client and exit connections are scrubbed of sensitive information.")
+      (license license:gpl3+))))