Update git ignore

.gitignore

@@ -1,4 +1,3 @@
-tags
 doc/tags
 *.class
 .floo
@@ -6,7 +5,22 @@ doc/tags
 *.netrwhist
 *-rplugin~
 *rplugin.vim
-/config/local.vim
-.SpaceVim.logA
+.SpaceVim.log
 docs/_site/*
 docs/Gemfile.lock
+# Ignore tags created by etags, ctags, gtags (GNU global) and cscope
+TAGS
+.TAGS
+!TAGS/
+tags
+.tags
+!tags/
+gtags.files
+GTAGS
+GRTAGS
+GPATH
+GSYMS
+cscope.files
+cscope.out
+cscope.in.out
+cscope.po.out

docs/layers/tags.md

@@ -0,0 +1,109 @@
+---
+title: "SpaceVim tags layer"
+---
+
+# [SpaceVim Layers:](https://spacevim.org/layers) tags
+
+<!-- vim-markdown-toc GFM -->
+* [Description](#description)
+* [Features](#features)
+* [Install](#install)
+    * [GNU Global (gtags)](#gnu-global-gtags)
+        * [Install on OSX using Homebrew](#install-on-osx-using-homebrew)
+        * [Install on \*nix from source](#install-on-nix-from-source)
+            * [Install recommended dependencies](#install-recommended-dependencies)
+            * [Install with recommended features](#install-with-recommended-features)
+            * [Configure your environment to use pygments and ctags](#configure-your-environment-to-use-pygments-and-ctags)
+    * [Load tags layer](#load-tags-layer)
+
+<!-- vim-markdown-toc -->
+
+## Description
+
+This layer provide tags manager for project. This layer need `core` layer's project manager feature.
+
+## Features
+
+-   Select any tag in a project retrieved by gtags
+-   Resume previous helm-gtags session
+-   Jump to a location based on context
+-   Find definitions
+-   Find references
+-   Present tags in current function only
+-   Create a tag database
+-   Jump to definitions in file
+-   Show stack of visited locations
+-   Manually update tag database
+-   Jump to next location in context stack
+-   Jump to previous location in context stack
+-   Jump to a file in tag database
+-   Enables eldoc in modes that otherwise might not support it.
+-   Enables company complete in modes that otherwise might not support it.
+
+## Install
+
+### GNU Global (gtags)
+
+To use gtags, you first have to install [GNU Global](https://www.gnu.org/software/global/download.html).
+
+You can install global from the software repository of your OS; however, many OS distributions are out of date, and you will probably be missing support for pygments and exuberant ctags, and thus support for many languages. We recommend installing from source. If not for example to install on Ubuntu:
+
+```sh
+sudo apt-get install global
+```
+
+#### Install on OSX using Homebrew
+
+```sh
+brew install global --with-pygments --with-ctags
+```
+
+#### Install on \*nix from source
+
+##### Install recommended dependencies
+
+To take full advantage of global you should install 2 extra packages in addition to global: pygments and ctags (exuberant). You can do this using your normal OS package manager, e.g., on Ubuntu
+
+```sh
+sudo apt-get install exuberant-ctags python-pygments
+```
+
+or e.g., Archlinux:
+
+```sh
+sudo pacman -S ctags python-pygments
+```
+
+##### Install with recommended features
+
+Download the latest tar.gz archive, then run these commands:
+
+```sh
+tar xvf global-6.5.3.tar.gz
+cd global-6.5.3
+./configure --with-exuberant-ctags=/usr/bin/ctags
+make
+sudo make install
+```
+
+##### Configure your environment to use pygments and ctags
+
+To be able to use pygments and ctags, you need to copy the sample gtags.conf either to /etc/gtags.conf or $HOME/.globalrc. For example:
+
+```sh
+cp gtags.conf ~/.globalrc
+```
+
+Additionally you should define GTAGSLABEL in your shell startup file e.g. with sh/ksh:
+
+```sh
+echo export GTAGSLABEL=pygments >> .profile
+```
+
+### Load tags layer
+
+To use this configuration layer, add it to your `~/.SpaceVim.d/init.vim`.
+
+```vim
+call SpaceVim#layers#load('tags')
+```