add Ansible contrib layer

contrib/ansible/README.md

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+# Ansible contribution layer for Spacemacs
+
+![ansible](img/ansible.png)
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc/generate-toc again -->
+**Table of Contents**
+
+- [Ansible contribution layer for Spacemacs](#ansible-contribution-layer-for-spacemacs)
+    - [Description](#description)
+    - [Install](#install)
+    - [Key bindings](#key-bindings)
+
+<!-- markdown-toc end -->
+
+## Description
+
+This layer add support for Ansible-flavored YAML buffers.
+
+## Install
+
+To use this contribution add it to your `~/.spacemacs`
+
+```elisp
+(setq-default dotspacemacs-configuration-layers '(ansible)
+"List of contribution to load."
+)
+```
+
+## Key bindings
+
+Key Binding   | Description
+--------------|------------------------------------------------------------
+`<SPC> m a ?` | looks up documentation using [`ansible-doc`][ansible-doc]
+
+[ansible-doc]: https://github.com/lunaryorn/ansible-doc.el

contrib/ansible/config.el

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+;;; funcs.el --- Ansible Layer extensions File for Spacemacs
+;;
+;; Copyright (c) 2012-2014 Sylvain Benner
+;; Copyright (c) 2015 Brian Hicks & Contributors
+;;
+;; Author: Brian Hicks <brian@brianthicks.com>
+;; URL: https://github.com/syl20bnr/spacemacs
+;;
+;; This file is not part of GNU Emacs.
+;;
+;;; License: GPLv3
+
+;; detect filenames compatible with Ansible's recommended layout.
+;; http://docs.ansible.com/playbooks_best_practices.html#directory-layout
+(setq ansible/ansible-filename-re
+      "\\(site\.yml\\|roles/.+\.yml\\|group_vars/.+\\|host_vars/.+\\)")

contrib/ansible/funcs.el

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+;;; funcs.el --- Ansible Layer extensions File for Spacemacs
+;;
+;; Copyright (c) 2012-2014 Sylvain Benner
+;; Copyright (c) 2015 Brian Hicks & Contributors
+;;
+;; Author: Brian Hicks <brian@brianthicks.com>
+;; URL: https://github.com/syl20bnr/spacemacs
+;;
+;; This file is not part of GNU Emacs.
+;;
+;;; License: GPLv3
+(defun ansible/ansible-should-enable? ()
+  (and (stringp buffer-file-name)
+       (string-match ansible/ansible-filename-re buffer-file-name)))
+
+(defun ansible/ansible-maybe-enable ()
+  (when (ansible/ansible-should-enable?)
+    (ansible 1)))
+
+(defun ansible/ansible-doc-maybe-enable ()
+  (when (ansible/ansible-should-enable?)
+    (ansible-doc-mode 1)
+    (evil-leader/set-key-for-mode 'yaml-mode
+      "ma?" 'ansible-doc)))

contrib/ansible/packages.el

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+;;; extensions.el --- Ansible Layer extensions File for Spacemacs
+;;
+;; Copyright (c) 2012-2014 Sylvain Benner
+;; Copyright (c) 2015 Brian Hicks & Contributors
+;;
+;; Author: Brian Hicks <brian@brianthicks.com>
+;; URL: https://github.com/syl20bnr/spacemacs
+;;
+;; This file is not part of GNU Emacs.
+;;
+;;; License: GPLv3
+(defvar ansible-packages '(yaml-mode
+                           ansible
+                           ansible-doc))
+
+(defun ansible/init-yaml-mode ()
+  (use-package yaml-mode
+    :defer t))
+
+(defun ansible/init-ansible ()
+  (use-package ansible
+    :defer t
+    :init (progn
+            (eval-after-load 'yaml-mode
+              '(add-hook 'yaml-mode-hook 'ansible/ansible-maybe-enable))
+
+            ;; ansible-mode requires ac-user-dictionary-files. If the
+            ;; config is using company-mode this variable will not be
+            ;; set, so we set it to a dummy value.
+            ;;
+            ;; Tracking here:
+            ;; https://github.com/k1LoW/emacs-ansible/issues/2
+            (when (member 'company-mode dotspacemacs-configuration-layers)
+              (setq ac-user-dictionary-files '())))))
+
+(defun ansible/init-ansible-doc ()
+  (use-package ansible-doc
+    :defer t
+    :init (eval-after-load 'yaml-mode
+            '(add-hook 'yaml-mode-hook 'ansible/ansible-doc-maybe-enable))))