spacemacs/README.md

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<p align="center"><img src="/doc/img/title2.png" alt="Spacemacs"/></p>
<p align="center">
<b><a href="doc/DOCUMENTATION.org#core-pillars">philosophy</a></b>
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<b><a href="doc/DOCUMENTATION.org#goals">goals</a></b>
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<b><a href="doc/DOCUMENTATION.org#user-content-who-can-benefit-from-this">for whom?</a></b>
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<b><a href="doc/DOCUMENTATION.org#screenshots">screenshots</a></b>
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<b><a href="doc/DOCUMENTATION.org">documentation</a></b>
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<b><a href="doc/CONTRIBUTE.org">contribute</a></b>
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<b><a href="doc/DOCUMENTATION.org#achievements">achievements</a></b>
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<b><a href="doc/FAQ.org">FAQ</a></b>
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***

**Quick Install:**

    git clone https://github.com/syl20bnr/spacemacs ~/.emacs.d

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**Table of Contents**

- [Introduction](#introduction)
- [Features](#features)
- [Documentation](#documentation)
- [Getting Help](#getting-help)
- [Prerequisites](#prerequisites)
    - [Emacs](#emacs)
        - [Linux distros](#linux-distros)
        - [OS X](#os-x)
        - [Windows](#windows)
- [Install](#install)
    - [Spacemacs logo](#spacemacs-logo)
- [Update](#update)
    - [Automatic update](#automatic-update)
    - [On develop branch](#on-develop-branch)
    - [Revert to a specific version](#revert-to-a-specific-version)
- [Contributions](#contributions)
- [License](#license)
- [Supporting Spacemacs](#supporting-spacemacs)

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# Introduction

Spacemacs is a new way to experience Emacs -- a sophisticated and
polished set-up focused on ergonomics, mnemonics and consistency.

Just clone it, launch it, then press the space bar to explore the
interactive list of carefully-chosen key bindings. You can also press
the home buffer's `[?]` button for some great first key bindings to
try.

Spacemacs can be used naturally by both Emacs and Vim users -- you can
even mix the two editing styles. Switching easily between input styles
makes Spacemacs a great tool for pair-programming.

Spacemacs is currently in beta, and contributions are very welcome.

![spacemacs_python](doc/img/spacemacs-python.png)

# Features

- **Great documentation:** Access documentation in Emacs with
<kbd>SPC f e h</kbd>
- **Beautiful GUI:** you'll love the distraction free UI and its functional
mode-line.
- **Excellent ergonomics:** all the key bindings are accessible by pressing
the <kbd>space bar</kbd> or <kbd>alt-m</kbd>.
- **Mnemonic key bindings:** commands have mnemonic prefixes like
<kbd>SPC b</kbd> for all the buffer commands or <kbd>SPC p</kbd> for the
project commands.
- **Batteries included:** discover hundreds of ready-to-use packages nicely
organised in configuration layers following a set of
[conventions][CONVENTIONS.org].

# Documentation

A comprehensive documentation is available for each layer by pressing
<kbd>SPC f e h</kbd>. 

To go to the general documentation [click here][DOCUMENTATION.org].

You can also check the [Quick Start guide][QUICK_START.org] and the
[FAQ][FAQ.org].

# Getting Help

If you need help, ask your question in the [Gitter Chat][] and a member of the
community will help you out.

If you prefer IRC, connect to the [Gitter Chat IRC server][] and join the
`#syl20bnr/spacemacs` channel.

# Prerequisites

## Emacs

Spacemacs is operational with Emacs 24.3 but Emacs 24.4 and above are
recommended to enjoy the full experience.

Some modes require third-party tools that you'll have to install via your
favorite package manager.

### Linux distros

Install Emacs from the package manager of your Linux distribution.

You should install the "emacs" package, not the "xemacs" package.
XEmacs is an old fork of Emacs. The X in its name is unrelated to X11.
Both Emacs and XEmacs have graphical support.

### OS X

We recommend the homebrew [emacs-mac-port][] formula:

```sh
$ brew tap railwaycat/homebrew-emacsmacport
$ brew install emacs-mac --with-spacemacs-icon  # OR, brew cask install emacs-mac
```

It is also recommended to add the [osx layer][] to your [dotfile][]:

```elisp
(setq-default dotspacemacs-configuration-layers '(osx))
```

Note that the `emacs-mac-port` server behaves differently than the regular
Emacs server.
Details can be found on the emacs-mac-port [README][emacs-mac-port-server].

### Windows

Good quality builds can be found [on this page][emacs-for-windows]. It is
recommended to install the most stable build.

Be sure to declare a environment variable named `HOME` pointing to your user
directory `C:\Users\<username>`. Then you can clone Spacemacs in this directory.

Sometimes you'll get the following error when you first start Emacs:

```
The directory ~/.emacs.d/server is unsafe
```

To fix it change the owner of the directory `~/.emacs.d/server`:
  - from Properties select the Tab “Security”,
  - select the button “Advanced”,
  - select the Tab “Owner”
  - change the owner to your account name

Source: [Stackoverflow][so-server-unsafe]

For efficient searches we recommend to install `pt` ([the platinum searcher][]).
`pt` version 1.7.7 or higher is required.

# Install

1. If you have an existing Emacs configuration, back it up first:

   ```sh
   cd ~
   mv .emacs.d .emacs.bak
   ```

2. Clone the repository:

   ```sh
   git clone --recursive https://github.com/syl20bnr/spacemacs ~/.emacs.d
   ```

   `master` is the stable branch and it is _immutable_, **DO NOT** make any
   modification to it or you will break the update mechanism. If you want to
   fork Spacemacs safely use the `develop` branch where you handle the update
   manually.

3. Launch Emacs. Spacemacs will automatically install the packages it requires.

4. Restart Emacs to complete the installation.

If the mode-line turns red then be sure to visit the
[troubleshooting][troubleshoot] guide and consult the [FAQ][FAQ.org].

## Spacemacs logo

If you are using Ubuntu and Unity then you can add the Spacemacs logo by
following the instructions [here][cpaulik-unity-icon].

If you're on a mac follow [these instructions][icon-mac-instructions]. You can
find an .icns version of the logo by [Nasser Alshammari](http://www.nass3r.com)
in [his repository][icon-repository].

# Update

Spacemacs has a built-in notification of a new version when you are on the
`master` branch. If you are on the `develop` branch then you'll have to
update Spacemacs manually by updating your repository.

## Automatic update

When a new version is available a little arrow appears in the mode-line.

Its color depends on the number of versions available since your last update.
Green means that your current version is recent, orange and red that your
current version is older.

![powerline_update](doc/img/powerline-update.png)

Click on the arrow to update Spacemacs to the last version.

## On develop branch

1. Update Emacs packages by clicking (press `RET`) on the `[Update]` link of
the starting page.

2. Close Emacs and update the git repository:

   ```sh
   git pull --rebase
   ```

3. Restart Emacs to complete the upgrade.

## Revert to a specific version

To revert to a specific version you just have to checkout the corresponding
branch, for instance to revert to the last `0.103`:

   ```sh
   git checkout origin/release-0.103
   ```

# Contributions

Spacemacs is a community-driven project, it needs _you_ to keep it up to
date and propose useful and complete configuration!

Before contributing be sure to consult the
[contribution guidelines][CONTRIBUTE.org] and [conventions][CONVENTIONS.org].

# License

The license is GPLv3 for all parts specific to Spacemacs, this includes:
- the initialization and core files
- all the layer files.
- the documentation

For the packages shipped in this repository you can refer to the files header.

[Spacemacs logo][] by [Nasser Alshammari][] released under a Creative Commons
license.

# Supporting Spacemacs

The best way to support Spacemacs is to contribute to it either by reporting
bugs, helping the community on the [Gitter Chat][] or sending pull requests.

If you want to show your support financially you can buy a drink to the
maintainer by clicking on the [Paypal badge](#top).

Thank you !

[Twitter]: http://i.imgur.com/tXSoThF.png
[CONTRIBUTE.org]: doc/CONTRIBUTE.org
[CONVENTIONS.org]: doc/CONVENTIONS.org
[DOCUMENTATION.org]: doc/DOCUMENTATION.org
[QUICK_START.org]: doc/QUICK_START.org
[FAQ.org]: doc/FAQ.org
[HOWTOs.org]: doc/HOWTOs.org
[VIMUSERS.org]: doc/VIMUSERS.org
[dotfile]: doc/DOCUMENTATION.org#dotfile-configuration
[troubleshoot]: doc/DOCUMENTATION.org#troubleshoot
[osx layer]: layers/osx/README.org
[Gitter Chat]: https://gitter.im/syl20bnr/spacemacs
[Gitter Chat IRC server]: https://irc.gitter.im/
[emacs-mac-port]: https://github.com/railwaycat/homebrew-emacsmacport
[emacs-mac-port-server]: https://github.com/railwaycat/emacs-mac-port/blob/master/README-mac#L210-L213
[emacs-for-windows]: http://emacsbinw64.sourceforge.net/
[the platinum searcher]: https://github.com/monochromegane/the_platinum_searcher
[so-server-unsafe]: http://stackoverflow.com/questions/885793/emacs-error-when-calling-server-start
[Spacemacs logo]: https://github.com/nashamri/spacemacs-logo
[Nasser Alshammari]: https://github.com/nashamri
[cpaulik-unity-icon]: http://splendidabacus.com/posts/2015/03/spacemacs-unity-icon/
[icon-mac-instructions]: http://www.idownloadblog.com/2014/07/16/how-to-change-app-icon-mac/
[icon-repository]: https://github.com/nashamri/spacemacs-logo