gnu: neovim: Add support for guix neovim packages.

Enables the use of guix as a package manager for neovim, compatible with
the outputs of `vim-build-system`.

* gnu/packages/vim.scm (neovim)[arguments]: Added another phase to
install the system init file to the correct place.
* gnu/packages/aux-files/guix-nvim.vim: New file.
* Makefile.am (AUX_FILES): Register file.

Change-Id: I375e3e0d051da27d065dff5456cb298a01bc90b1
Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

1 files changed, 9 insertions, 1 deletions

diff --git a/gnu/packages/vim.scm b/gnu/packages/vim.scm
index 36357598ef8..02182dad488 100644
--- a/gnu/packages/vim.scm
+++ b/gnu/packages/vim.scm
@@ -862,7 +862,15 @@ is based on Vim's builtin plugin support.")
                    ;; doubles its size.  We remove the reference here.
                    (substitute* "cmake.config/versiondef.h.in"
                      (("\\$\\{CMAKE_C_COMPILER\\}") "/gnu/store/.../bin/gcc"))
-                   #t)))))
+                   #t))
+               (add-after 'install 'install-guix-nvim.vim
+                 (lambda* (#:key outputs #:allow-other-keys)
+                   (let ((nvimdir (string-append (assoc-ref outputs "out")
+                                                 "/share/nvim")))
+                     (mkdir-p nvimdir)
+                     (copy-file
+                       #$(local-file (search-auxiliary-file "guix-nvim.vim"))
+                       (string-append nvimdir "/sysinit.vim"))))))))
     (inputs (list libuv-for-luv
                   msgpack
                   libtermkey