gnu: Add emacs-synosaurus.

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

gnu/packages/emacs.scm

@@ -118,6 +118,7 @@
   #:use-module (gnu packages gnupg)
   #:use-module (gnu packages video)
   #:use-module (gnu packages haskell)
+  #:use-module (gnu packages wordnet)
   #:use-module (guix utils)
   #:use-module (srfi srfi-1)
   #:use-module (ice-9 match))
@@ -12197,3 +12198,41 @@ wrapper around all Imagemagick commands with descriptions, autocompletion (for
 some commands) and hints displayed in prompt using @command{eimp.el} to
 execute its commands and resize images.")
       (license license:gpl3+))))
+
+(define-public emacs-synosaurus
+  (let ((commit "8bf95b935976ec0a1964cf175ed57cc5f6f93bdb"))
+    (package
+      (name "emacs-synosaurus")
+      (version (git-version "0.1.0" "1" commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/hpdeifel/synosaurus")
+               (commit commit)))
+         (file-name (git-file-name name version))
+         (sha256
+          (base32
+           "15by9jccab6kyplxa6k0glzaivxkqdigl33gl2qi2cvy6f2q7gva"))))
+      (build-system emacs-build-system)
+      (propagated-inputs
+       `(("wordnet" ,wordnet)))
+      (arguments
+       `(#:phases
+         (modify-phases %standard-phases
+           (add-after 'unpack 'configure
+             (lambda* (#:key inputs outputs #:allow-other-keys)
+               (let ((wn (assoc-ref inputs "wordnet")))
+                 ;; .el is read-only in git.
+                 (chmod "synosaurus-wordnet.el" #o644)
+                 ;; Specify the absolute file names of the various
+                 ;; programs so that everything works out-of-the-box.
+                 (emacs-substitute-variables
+                     "synosaurus-wordnet.el"
+                   ("wordnet-command"
+                    (string-append wn "/bin/wn")))))))))
+      (home-page "https://github.com/hpdeifel/synosaurus")
+      (synopsis "Extensible thesaurus mode for Emacs")
+      (description "Synosaurus is a thesaurus fontend for Emacs with pluggable
+backends, including the @command{wordnet} offline backend.")
+      (license license:gpl3+))))