#+TITLE: Quick start

* Table of Contents                     :TOC_5_gh:noexport:
- [[#configuration-layers][Configuration layers]]
- [[#dotfile-spacemacs][Dotfile (.spacemacs)]]
- [[#dotdirectory-spacemacsd][Dotdirectory (~/.spacemacs.d)]]
- [[#learning-spacemacs][Learning Spacemacs]]
  - [[#editing-styles][Editing Styles]]
  - [[#the-leader-keys][The leader keys]]
  - [[#evil-tutor][Evil-tutor]]
  - [[#universal-argument][Universal argument]]
  - [[#configuration-layers-and-package-discovery][Configuration layers and Package discovery]]
  - [[#key-bindings-discovery][Key bindings discovery]]
  - [[#describe-functions][Describe functions]]
- [[#how-tos][How-To's]]

* Configuration layers
Spacemacs divides its configuration into self-contained units called
=configuration layers=. These layers are stacked on top of each other to achieve
a custom configuration.

By default Spacemacs uses a dotfile called =~/.spacemacs= to control which
layers to load. Within this file you can also configure certain features. This
design makes it extremely easy to turn Spacemacs into a fully integrated
development environment.

For example to get python support, simply add =python= to the list of
=dotspacemacs-configuration-layers= in your =~/.spacemacs=. Find the
=~/.spacemacs= file by pressing =SPC f e d= and then after adding the layer,
reload it with =SPC f e R=. Now open a =.py= file (=SPC f f=) to find the python
environment has been fully configured. Some extra configuration might make the
environment even more powerful, which is very well described in the [[https://develop.spacemacs.org/layers/+lang/python/README.html][layer's
documentation]] that can be accessed by pressing =SPC h l= and selecting the
=python= layer entry. For configuration of specific packages within a layer,
=SPC h SPC= provides quick navigation functionality for jumping directly to the
relevant location within the configuration files.

A list of pre-configured layers is available [[https://develop.spacemacs.org/layers/LAYERS.html][here]]. If you still would like to
configure anything not covered by any layer, then it is easy to build a personal
layer.

A configuration layer is a directory containing at least a =packages.el=
file which defines and configures packages to be downloaded from Emacs
package repositories using the =package.el= built-in feature of Emacs.

If you already have your own =Emacs= configuration you can move it to your
own layer.

The following command creates a layer in the =private= directory:

#+BEGIN_EXAMPLE
  SPC SPC configuration-layer/create-layer RET
#+END_EXAMPLE

Any configuration layers you create must be explicitly loaded in =~/.spacemacs=.

Note: For your privacy, the contents of the =private= directory are not
under source control. See the section on private configuration management in
the [[https://github.com/syl20bnr/spacemacs/blob/develop/doc/DOCUMENTATION.org][documentation]].

* Dotfile (.spacemacs)
As mentioned =.spacemacs= controls which configuration layers to load and
is also a means to customizing Spacemacs.

The following command will create a =.spacemacs= file in your home directory:

#+BEGIN_EXAMPLE
  SPC SPC dotspacemacs/install RET
#+END_EXAMPLE

To open the installed dotfile:

#+BEGIN_EXAMPLE
  SPC f e d
#+END_EXAMPLE

To load some configuration layers using the variable
=dotspacemacs-configuration-layers=:

#+BEGIN_SRC elisp
  ;; List of configuration layers to load.
  dotspacemacs-configuration-layers '(auto-completion smex)
#+END_SRC

Some configuration layers support configuration variables to expose granular
control over layer-specific features, [[https://github.com/syl20bnr/spacemacs/blob/develop/layers/+source-control/git/README.org][git layer]] being one such example.
Variables can be directly set within =dotspacemacs-configuration-layers= like so:

#+BEGIN_SRC elisp
  ;; List of configuration layers to load.
  dotspacemacs-configuration-layers '(auto-completion
                                      (git :variables
                                           git-magit-status-fullscreen t)
                                      smex)
#+END_SRC

At anytime you can apply the changes made to the dotfile or layers
_without restarting_ Spacemacs by pressing ~SPC f e R~.

The [[https://github.com/syl20bnr/spacemacs/blob/master/core/templates/.spacemacs.template][dotfile template]] contains further information about how to customize
Spacemacs. See the dotfile configuration section of the [[https://github.com/syl20bnr/spacemacs/blob/develop/doc/DOCUMENTATION.org#dotfile-configuration][documentation]] for
more details.

* Dotdirectory (~/.spacemacs.d)
Like =Emacs=, Spacemacs initialization can also be contained in an =init.el= file
in a special directory =~/.spacemacs.d=. The contents of the dotfile should be
then copied in the =init.el= file.

The Emacs dotfile or dotdirectory is not replaced but rather
complemented by the Spacemacs dotfile or dotdirectory. During startup,
Emacs still uses =~/.emacs.d/init.el= (or =~/.emacs=) for its
initialization, and variable =user-emacs-directory= will still point
to =~/.emacs.d/=, even if =~/.spacemacs.d= or =~/.spacemacs= are
present. Only now =~/.emacs.d/init.el= is provided by Spacemacs
(e.g. after cloning the Spacemacs git repo into an empty
=~/.emacs.d/=), and your own personal configurations go into
=~/.spacemacs.d/init.el= (or =~/.spacemacs=).

Have a look into the FAQ for an easy workaround to maintain (your
former) vanilla Emacs and (your new) Spacemacs configurations
side-by-side without the need to rename and backup =~/.emacs.d/=.

* Learning Spacemacs
** Editing Styles
Spacemacs can be used by Vim users or Emacs users by setting the
=dotspacemacs-editing-style= variable to =vim=, =emacs= or even =hybrid=
in the dotfile =~/.spacemacs=.

** The leader keys
Spacemacs key bindings use a leader key which is by default bound to
~SPC~ (space bar) in =vim= or =hybrid= editing styles and ~M-m~ in =emacs=
style.

You can change it by setting the variable =dotspacemacs-leader-key= if
you use the =vim= style or =dotspacemacs-emacs-leader-key= if you use
the =emacs= style (these variables must be set in the file =~/.spacemacs=).

For simplicity the documentation always refers to the leader key as
~SPC~.

There is a secondary leader key called the major-mode leader key which is
set to ~​,​~ by default. This key is a shortcut for ~SPC m~
where all the major-mode specific commands are bound.

** Evil-tutor
If you are willing to learn the Vim key bindings (highly recommended since
you can benefit from them even in =emacs= style), press ~SPC h T v~
to begin an Evil-adapted Vimtutor.

** Universal argument
In =vim= editing style the universal argument defaults to ~SPC u~
instead of ~C-u~ because the latter is used to scroll up as in Vim.

** Configuration layers and Package discovery
By using =helm-spacemacs-help= with ~SPC h SPC~ you can quickly search
for a package and get the name of the layers using it.

You can also easily go to the =README.org= of a layer or go to the initialization
function of a package.

** Key bindings discovery
Thanks to [[https://github.com/justbur/emacs-which-key][which-key]], whenever a prefix command is pressed (like ~SPC~)
a buffer appears after one second listing the possible keys for this prefix.

It is also possible to search for specific key bindings by pressing:

#+BEGIN_EXAMPLE
  SPC ?
#+END_EXAMPLE

To narrow the bindings list to those prefixed with =SPC=,
type a pattern like this regular expression:

#+BEGIN_EXAMPLE
  SPC\ b
#+END_EXAMPLE

which would list all =buffer= related bindings. *Note:* You are at the
/HELM-Descbind/ prompt, the pattern consists of 6 letters: uppercase ~SPC~, a
backslash, an actual space and a lowercase ~b~.

** Describe functions
=Describe functions= are powerful Emacs introspection commands to get information
about functions, variables, modes etc. These commands are bound thusly:

| Key binding | Description         |
|-------------+---------------------|
| ~SPC h d f~ | describe-function   |
| ~SPC h d k~ | describe-key        |
| ~SPC h d m~ | describe-mode       |
| ~SPC h d v~ | describe-variable   |
| ~SPC h d x~ | describe-ex-command |

* How-To's
Some quick =how-to's= are compiled in the [[https://github.com/syl20bnr/spacemacs/blob/develop/doc/FAQ.org#how-do-i][FAQ.]]
