emacs-ibuffer-project

Emacs package that provides ibuffer filtering and sorting functions to group buffers by custom functions or regexps. By default buffers are grouped by project or by default directory.

Usage

To group buffers set ibuffer-filter-groups to result of ibuffer-project-generate-filter-groups function:

(add-hook
 'ibuffer-hook
 (lambda ()
   (setq ibuffer-filter-groups (ibuffer-project-generate-filter-groups))
   (unless (eq ibuffer-sorting-mode 'project-file-relative)
     (ibuffer-do-sort-by-project-file-relative))))

Custom groups

Creating custom groups is possible by customizing ibuffer-project-root-functions. For example, add function file-remote-p like this:

(add-to-list 'ibuffer-project-root-functions '(file-remote-p . "Remote"))

In this case all remote buffers will be grouped by a string identifying the remote connection.

Project relative filename

This package also provides column with filename relative to project. If there are no file in buffer then column will display buffer name.

Add project-file-relative to ibuffer-formats:

(custom-set-variables
 '(ibuffer-formats
   '((mark modified read-only locked " "
           (name 18 18 :left :elide)
           " "
           (size 9 -1 :right)
           " "
           (mode 16 16 :left :elide)
           " " project-file-relative))))

It's also possible to sort buffers by that column by calling ibuffer-do-sort-by-project-file-relative or:

(add-hook 'ibuffer-hook
          (lambda ()
            (setq ibuffer-filter-groups (ibuffer-project-generate-filter-groups))
            (unless (eq ibuffer-sorting-mode 'project-file-relative)
              (ibuffer-do-sort-by-project-file-relative))))

Caching project per directory

To avoid calling project-current each time, one can set ibuffer-project-use-cache. Project info will be stored in the ibuffer-project-cache variable. Command ibuffer-project-clear-cache allows to clear project info cache.

Installation

With package.el

ibuffer-project available on MELPA:

M-x package-install RET ibuffer-project RET.

Alternatively, you can download ibuffer-project.el and run:

M-x package-install-file RET <path-to-ibuffer-project-el> RET