gnu: Add vim-airline.

* gnu/packages/vim.scm (vim-airline): New variable.

Signed-off-by: Kei Kebreau <kei@openmailbox.org>

gnu/packages/vim.scm

@@ -411,6 +411,47 @@ trouble using them, because you do not have to remember each snippet name.")
       (home-page "https://github.com/Shougo/context_filetype.vim")
       (license license:expat)))) ; ??? check again
 
+(define-public vim-airline
+  (package
+    (name "vim-airline")
+    (version "0.8")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/vim-airline/vim-airline/"
+                           "archive/v" version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "053sfq3jmgdc5y7zbg6jrk7r2hp0raj3y3mxa2h1c1bnkb6wvcaz"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (delete 'build)
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (vimfiles (string-append out "/share/vim/vimfiles"))
+                    (autoload (string-append vimfiles "/autoload"))
+                    (doc (string-append vimfiles "/doc"))
+                    (t (string-append vimfiles "/t"))
+                    (plugin (string-append vimfiles "/plugin")))
+               (copy-recursively "autoload" autoload)
+               (copy-recursively "doc" doc)
+               (copy-recursively "plugin" plugin)
+               (copy-recursively "t" t)
+               #t))))))
+    (synopsis "Statusline for Vim")
+    (description
+     "@code{vim-airline} is an extensible statusline for Vim.
+It can be extended and costumized with themes, works with unicode fonts
+and powerline symbols, etc.")
+    (home-page "https://github.com/vim-airline/vim-airline")
+    (license license:expat)))
+
 (define-public neovim
   (package
     (name "neovim")