gnu: Add emacs-dumb-jump.

* gnu/packages/emacs.scm (emacs-dumb-jump): New public variable.

gnu/packages/emacs.scm

@@ -9489,3 +9489,32 @@ buffer with each of your todos.")
     (description
      "The Fantastic File Finder for Emacs.  Find files fast, using helm.")
     (license license:gpl3+)))
+
+(define-public emacs-dumb-jump
+  (package
+    (name "emacs-dumb-jump")
+    (version "0.5.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/jacktasia/dumb-jump/archive/"
+                           "v" version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "07n0xjgpxjpf3vp9gxchkjpydyj0zm166930as0kwiwkhjlsirsf"))))
+    (build-system emacs-build-system)
+    (propagated-inputs
+     `(("emacs-f" ,emacs-f)
+       ("emacs-s" ,emacs-s)
+       ("emacs-dash" ,emacs-dash)
+       ("emacs-popup" ,emacs-popup)))
+    (home-page "https://github.com/jacktasia/dumb-jump")
+    (synopsis "Jump to definition for multiple languages without configuration")
+    (description "Dumb Jump is an Emacs \"jump to definition\" package with
+support for multiple programming languages that favors \"just working\" over
+speed or accuracy.  This means minimal -- and ideally zero -- configuration
+with absolutely no stored indexes (TAGS) or persistent background processes.
+Dumb Jump performs best with The Silver Searcher `ag` or ripgrep `rg`
+installed.  Dumb Jump requires at least GNU Emacs 24.3. ")
+    (license license:gpl3+)))