gnu: Add emacs-magit-gerrit.

* gnu/packages/emacs-xyz.scm (emacs-magit-gerrit): New variable.

gnu/packages/emacs-xyz.scm

@@ -10160,6 +10160,32 @@ time is being spent during Emacs startup in order to optimize startup time.")
   ;; A new mpv backend is included in Emms from 5.0.
   (deprecated-package "emacs-emms-player-simple-mpv" emacs-emms))
 
+(define-public emacs-magit-gerrit
+  (let ((version "0.3")
+        (revision "1")
+        (commit "ece6f369694aca17f3ac166ed2801b432acfe20d"))
+    (package
+      (name "emacs-magit-gerrit")
+      (version (git-version version revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/terranpro/magit-gerrit.git")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "0mms0gxv9a3ns8lk5k2wjibm3088y1cmpr3axjdh6ppv7r5wdvii"))))
+      (build-system emacs-build-system)
+      (propagated-inputs
+       `(("emacs-magit" ,emacs-magit)))
+      (home-page "https://github.com/terranpro/magit-gerrit")
+      (synopsis "Magit extension for Gerrit")
+      (description "This Magit extension provides integration with Gerrit,
+which makes it possible to conduct Gerrit code reviews directly from within
+Emacs.")
+      (license license:gpl3+))))
+
 (define-public emacs-magit-org-todos-el
   (let ((commit "df206287737b9671f2e36ae7b1474ebbe9940d2a"))
     (package