gnu: Add emacs-dante.

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

Signed-off-by: Oleg Pykhalov <go.wigust@gmail.com>

gnu/packages/emacs-xyz.scm

@@ -667,6 +667,37 @@ (define (copy-to-dir dir files)
 (define-public haskell-mode
   (deprecated-package "haskell-mode" emacs-haskell-mode))
 
+(define-public emacs-dante
+  (let ((commit "149dded24ca9cdff09a3d859e4b62638db4aadda")
+        (revision "1"))
+    (package
+      (name "emacs-dante")
+      (version (git-version "1.5" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/jyp/dante")
+                      (commit commit)))
+                (sha256
+                 (base32
+                  "0i7kj3d6pfys6si9va5f36qzifyac9mahdl0qh40rya9m0syrkla"))
+                (file-name (git-file-name name version))))
+      (build-system emacs-build-system)
+      (propagated-inputs
+       `(("emacs-dash" ,emacs-dash)
+         ("emacs-f" ,emacs-f)
+         ("emacs-flycheck" ,emacs-flycheck)
+         ("emacs-haskell-mode" ,emacs-haskell-mode)
+         ("emacs-s" ,emacs-s)
+         ("emacs-company" ,emacs-company)
+         ("emacs-lcr" ,emacs-lcr)))
+      (home-page "https://github.com/jyp/dante")
+      (synopsis "Minor mode for interactive Haskell")
+      (description
+       "This package provides a minor mode for Haskell development that
+supports type hints, definition-jumping, completion, and more.")
+      (license license:gpl3+))))
+
 (define-public emacs-flycheck
   (package
     (name "emacs-flycheck")