gnu: Add trydiffoscope.

* gnu/packages/package-management (trydiffoscope): New variable.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu/packages/package-management.scm

@@ -10,6 +10,7 @@
 ;;; Copyright © 2018 Sou Bunnbu <iyzsong@member.fsf.org>
 ;;; Copyright © 2018 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2019 Vagrant Cascadian <vagrant@reproducible-builds.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -606,6 +607,55 @@ various binary formats into more human readable forms to compare them.  It can
 compare two tarballs, ISO images, or PDFs just as easily.")
     (license license:gpl3+)))
 
+(define-public trydiffoscope
+ (package
+   (name "trydiffoscope")
+   (version "67.0.1")
+   (source
+    (origin
+      (method git-fetch)
+      (uri (git-reference
+            (url "https://salsa.debian.org/reproducible-builds/trydiffoscope.git")
+            (commit version)))
+      (file-name (git-file-name name version))
+      (sha256
+       (base32
+        "03b66cjii7l2yiwffj6ym6mycd5drx7prfp4j2550281pias6mjh"))))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'install 'install-doc
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((share (string-append (assoc-ref outputs "out") "/share/")))
+               (mkdir-p (string-append share "/man/man1/" ))
+               (invoke "rst2man.py"
+                       "trydiffoscope.1.rst"
+                       (string-append share "/man/man1/trydiffoscope.1"))
+               (mkdir-p (string-append share "/doc/" ,name "-" ,version))
+               (install-file "./README.rst"
+                          (string-append share "/doc/" ,name "-" ,version)))
+             #t)))))
+    (propagated-inputs
+     `(("python-requests" ,python-requests)))
+    (native-inputs
+     `(("gzip" ,gzip)
+       ("python-docutils" ,python-docutils)))
+    (build-system python-build-system)
+    (home-page "https://try.diffoscope.org")
+    (synopsis "Client for remote diffoscope service")
+    (description "This is a client for the @url{https://try.diffoscope.org,
+remote diffoscope service}.
+
+Diffoscope tries to get to the bottom of what makes files or directories
+different.  It recursively unpacks archives of many kinds and transforms
+various binary formats into more human readable forms to compare them.  It can
+compare two tarballs, ISO images, or PDFs just as easily.
+
+Results are displayed by default, stored as local text or html files, or made
+available via a URL on @url{https://try.diffoscope.org}.  Results stored on the
+server are purged after 30 days.")
+    (license license:gpl3+)))
+
 (define-public python-anaconda-client
   (package
     (name "python-anaconda-client")