The project is looking for more maintainers. I (Bozhidar) don't use Helm myself and don't have much time for the project, so I would definitely appreciate some help with it.

Contact me via e-mail or twitter if you'd like to become a co-maintainer.

Helm Projectile

Projectile can be integrated with Helm via helm-source-projectile-projects, helm-source-projectile-files-list, helm-source-projectile-buffers-list and helm-source-projectile-recentf-list sources (available in helm-projectile.el). There is also an example function for calling Helm with the Projectile file source. You can call it like this:

M-x helm-projectile

or even better - invoke the key binding C-c p h.

Installation

The recommended way to install helm-projectile is via package.el.

package.el

MELPA

You can install a snapshot version of helm-projectile from the MELPA repository. The version of Projectile there will always be up-to-date, but it might be unstable (albeit rarely).

MELPA Stable

You can install the last stable version of helm-projectile from the MELPA Stable repository.

el-get

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

Emacs Prelude

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

Debian and Ubuntu

Users of Debian 9 or later or Ubuntu 16.04 or later may apt-get install elpa-helm-projectile.

Usage

For those who prefer helm to ido, the command helm-projectile-switch-project can be used to replace projectile-switch-project to switch project. Please note that this is different from simply setting projectile-completion-system to helm, which just enables projectile to use the Helm completion to complete a project name. The benefit of using helm-projectile-switch-project is that on any selected project we can fire many actions, not limited to just the "switch to project" action, as in the case of using helm completion by setting projectile-completion-system to helm. Currently, there are five actions: "Switch to project", "Open Dired in project's directory", "Open project root in vc-dir or magit", "Switch to Eshell" and "Grep project files". We will add more and more actions in the future.

helm-projectile is capable of opening multiple files by marking the files with C-SPC or mark all files with M-a. Then, press RET, all the selected files will be opened.

Note that the helm grep is different from projectile-grep because the helm grep is incremental. To use it, select your projects (select multiple projects by pressing C-SPC), press "C-s" (or "C-u C-s" for recursive grep), and type your regexp. As you type the regexp in the mini buffer, the live grep results are displayed incrementally.

helm-projectile also provides Helm versions of common Projectile commands. Currently, these are the supported commands:

• helm-projectile-switch-project
• helm-projectile-find-file
• helm-projectile-find-file-in-known-projects
• helm-projectile-find-file-dwim
• helm-projectile-find-dir
• helm-projectile-recentf
• helm-projectile-switch-to-buffer
• helm-projectile-grep (can be used for both grep or ack)
• helm-projectile-ag
• helm-projectile-rg
• Replace Helm equivalent commands in projectile-commander
• A virtual directory manager that is unique to Helm Projectile

Why should you use these commands compared with the normal Projectile commands, even if the normal commands use helm as projectile-completion-system? The answer is, Helm specific commands give more useful features. For example, helm-projectile-switch-project allows opening a project in Dired, Magit or Eshell. helm-projectile-find-file reuses actions in helm-find-files (which is plenty) and able to open multiple files. Another reason is that in a large source tree, helm-projectile could be slow because it has to open all available sources.

If you want to use these commands, you have to activate it to replace the normal Projectile commands:

;; (setq helm-projectile-fuzzy-match nil)
(require 'helm-projectile)
(helm-projectile-on)

If you already activate helm-projectile key bindings and you don't like it, you can turn it off and use the normal Projectile bindings with command helm-projectile-off. Similarly, if you want to disable fuzzy matching in Helm Projectile (it is enabled by default), you must set helm-projectile-fuzzy-match to nil before loading helm-projectile.

To fully learn Helm Projectile and see what it is capable of, you should refer to this guide: Exploring large projects with Projectile and Helm Projectile.

Obviously you need to have Helm installed for this to work. :-)