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+# ag.vim #
+
+This plugin is a front for ag, A.K.A.
+[the_silver_searcher](https://github.com/ggreer/the_silver_searcher).  Ag can
+be used as a replacement for 153% of the uses of `ack`.  This plugin will allow
+you to run ag from vim, and shows the results in a split window.
+
+## Installation ##
+
+See [the_silver_searcher's README](https://github.com/ggreer/the_silver_searcher#installing) for its installation instructions (if you haven't installed it already).
+
+You have to first install [ag](https://github.com/ggreer/the_silver_searcher), itself. On Mac+Homebrew, Gentoo Linux, several others, there's package named `the_silver_searcher`, but if your OS/distro don't have one, the GitHub repo installs fine:
+
+Vim has various ways of installing plugins, the standard way is in [the documentation](http://vimdoc.sourceforge.net/htmldoc/usr_05.html#plugin), but most people use a plugin to manage their plugins. If you don't already have a preferred plugin manager plugin, why not try one of the following?
+- [vim-plug](https://github.com/junegunn/vim-plug#readme)
+- [vim-pathogen](https://github.com/tpope/vim-pathogen#readme)
+- [Vundle.vim](https://github.com/gmarik/Vundle.vim#readme)
+- Or, if you don't use any sort of Vim plugin management:
+
+  ```sh
+  cd ~/.vim/bundle && git clone https://github.com/rking/ag.vim ag && echo "set runtimepath^=~/.vim/bundle/ag" >> ~/.vimrc
+  ```
+
+  Then open vim and rum `:helptags ~/.vim/bundle/ag/doc`.
+
+### Configuration ###
+
+You can specify a custom ag name and path in your .vimrc like so:
+
+    let g:agprg="<custom-ag-path-goes-here> --vimgrep"
+
+You can configure ag.vim to always start searching from your project root
+instead of the cwd
+
+    let g:ag_working_path_mode="r"
+
+## Usage ##
+
+    :Ag [options] {pattern} [{directory}]
+
+Search recursively in {directory} (which defaults to the current directory) for the {pattern}.
+
+Files containing the search term will be listed in the split window, along with
+the line number of the occurrence, once for each occurrence.  [Enter] on a line
+in this window will open the file, and place the cursor on the matching line.
+
+Just like where you use :grep, :grepadd, :lgrep, and :lgrepadd, you can use `:Ag`, `:AgAdd`, `:LAg`, and `:LAgAdd` respectively. (See `doc/ag.txt`, or install and `:h Ag` for more information.)
+
+### Gotchas ###
+
+Some characters have special meaning, and need to be escaped your search pattern. For instance, '#'. You have to escape it like this `:Ag '\\\#define foo'` to search for `#define foo`. (From [blueyed in issue #5](https://github.com/mileszs/ack.vim/issues/5).)
+
+Sometimes `git grep` is even faster, though in my experience it's not noticeably so.
+
+### Keyboard Shortcuts ###
+
+In the quickfix window, you can use:
+
+    e    to open file and close the quickfix window
+    o    to open (same as enter)
+    go   to preview file (open but maintain focus on ag.vim results)
+    t    to open in new tab
+    T    to open in new tab silently
+    h    to open in horizontal split
+    H    to open in horizontal split silently
+    v    to open in vertical split
+    gv   to open in vertical split silently
+    q    to close the quickfix window
+
+### Acknowledgements ###
+
+This Vim plugin is derived (and by derived, I mean copied, almost entirely)
+from [milesz's ack.vim](https://github.com/mileszs/ack.vim), which I also
+recommend installing since you might be in a situation where you have ack but
+not ag, and don't want to stop to install ag. Also, ack supports `--type`, and
+a few other features.