Prerequisites

You'll need to have Emacs installed (preferably the latest stable release). If you're new to Emacs you might want to go through the guided tour of Emacs and the built-in tutorial (just press C-h t).

Note

Projectile officially supports Emacs 25.1+.

Installation

The recommended way to install Projectile is via package.el.

Installation via package.el

Projectile is available on the two major package.el community maintained repos - MELPA Stable and MELPA.

You can install Projectile with the following command:

M-x package-install [RET] projectile [RET]

or by adding this bit of Emacs Lisp code to your Emacs initialization file (.emacs or init.el):

(unless (package-installed-p 'projectile)
  (package-install 'projectile))

If the installation doesn't work try refreshing the package list:

M-x package-refresh-contents [RET]

Keep in mind that MELPA packages are built automatically from the master branch, meaning bugs might creep in there from time to time. Never-the-less, installing from MELPA is a reasonable way of obtaining Projectile, as the master branch is normally quite stable and serious regressions there are usually fixed pretty quickly.

Tip

If you don't want to (or can't) wait for MELPA to rebuild Projectile, you can easily build and install an up-to-date MELPA package locally yourself. Check out this article for details on the subject.

Generally, users of the non-adventurous kind are advised to stick with the stable releases, available from MELPA Stable. You can pin Projectile to always use MELPA Stable by adding this to your Emacs initialization:

(add-to-list 'package-pinned-packages '(projectile . "melpa-stable") t)

Finally add this to your Emacs config:

(projectile-mode +1)
(define-key projectile-mode-map (kbd "s-p") 'projectile-command-map)
(define-key projectile-mode-map (kbd "C-c p") 'projectile-command-map)

Those keymap prefixes are just a suggestion. Feel free to put there whatever works best for you.

Note

C-c p used to be the default prefix up to version 1.1, but starting with version 1.1 you have to select prefix key(s) yourself.

Installation via use-package

use-package can be used to install Projectile via the package.el's repositories MELPA Stable and MELPA.

If you wanted to install the version of Projectile which is what is to be found in the master branch, declare the following in your Emacs initialization file (.emacs or init.el):

(use-package projectile
  :ensure t
  :config
  (define-key projectile-mode-map (kbd "s-p") 'projectile-command-map)
  (define-key projectile-mode-map (kbd "C-c p") 'projectile-command-map)
  (projectile-mode +1))

However, if you wanted to be a bit more conservative and only use the stable releases of Projectile, you'd declare the following:

(use-package projectile
  :ensure t
  :pin melpa-stable
  :config
  (define-key projectile-mode-map (kbd "s-p") 'projectile-command-map)
  (define-key projectile-mode-map (kbd "C-c p") 'projectile-command-map)
  (projectile-mode +1))

After placing one of the above s-expressions, evaluate it, for it to take effect by entering: C-x C-e.

For further configuration options with use-package, consult the official use-package repository.

Installation via el-get

Projectile is also available for installation from the el-get package manager.

Provided you've already installed el-get you can install Projectile with the following command:

M-x el-get-install [RET] projectile [RET]

Installation on Debian and Ubuntu

Users of Debian 9 or later or Ubuntu 16.10 or later may simply apt-get install elpa-projectile.

Your favourite Linux distrubution might be providing a Projectile package as well.

Emacs Prelude

Projectile is naturally part of the Emacs Prelude. If you're a Prelude user - Projectile is already properly configured and ready for action.