[bug#31954] [PATCH] gnu: Add emacs-org-brain.

[Vasile Dumitrascu <va511e@yahoo.com>]

* gnu/packages/emacs.scm (emacs-org-brain): New variable.
---
 gnu/packages/emacs.scm | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gnu/packages/emacs.scm b/gnu/packages/emacs.scm
index 3b2c41c5d..616175d54 100644
--- a/gnu/packages/emacs.scm
+++ b/gnu/packages/emacs.scm
@@ -11277,3 +11277,28 @@ file.")
        "@code{wgrep-helm} allows you to edit a @code{helm-grep-mode} buffer and
 apply those changes to the file buffer.")
       (license license:gpl3+))))
+
+(define-public emacs-org-brain
+  (let ((version "20180522")  ; no proper tag, use date of commit
+        (commit "3faf9303af3f2356e3444e69c22dc6c5774047d1")
+        (revision "1"))
+    (package
+      (name "emacs-org-brain")
+      (version (git-version version revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/Kungsgeten/org-brain.git")
+               (commit commit)))
+         (file-name (git-file-name name version))
+         (sha256
+          (base32
+           "1ad681zk6kckw2zbk0r4iaj4bw8cfqrbd1s3gdwgdjlzq81q9mmj"))))
+      (build-system emacs-build-system)
+      (home-page "https://github.com/Kungsgeten/org-brain")
+      (synopsis "Org-mode wiki and concept-mapping for Emacs")
+      (description "@code{emacs-org-brain} implements a variant of concept
+mapping in Emacs, using @code{org-mode}. It is heavily inspired by a piece of
+software called The Brain.")
+      (license license:expat))))
-- 
2.18.0