Luis' OpenWith Fork

OpenWith is a simple but very useful package to make Emacs associate various file types with external applications. For example, Emacs can open PDFs, but you may want to open them with a dedicated PDF viewer instead. With OpenWith, you can do this seamlessly when you use C-x C-f. It also works with recentf and ido.

See also http://www.emacswiki.org/emacs/OpenWith.

Installation

After installation the command openwith-mode, which enables the global minor mode, is autoloaded, you can call it without any additional configuration.

straight.el

Having set up straight.el, add the following to your .emacs.d/init.el, then restart your Emacs:

(straight-use-package
 '(openwith :fork (:host github :repo "luisgerhorst/openwith")))

For a complete example configuration see example-configs/straight/init.el. You can omit the parts already included in your init.el.

Activation

To enable OpenWith automatically when the desktop environment is recognized, add the following to your .emacs.d/init.el after installing it:

(require 'openwith)
(when openwith-desktop-environment-open
    (openwith-mode t))

Development

The following serves as documentation for contributors to easy development. If you just want to use this package as a end user this should not concern you.

Refer to the Makefile for additional commands that may be useful.

Compile/Lint

Install cask, then:

make all

Test Run

cask emacs

Test Config & Installation

Load the example configuration into a vanilla instance of Emacs, this will install straight.el to ./example-config/straight:

make test

Future Work

Implement that fulfills the following: We either want to open files or directories
- Certain files Emacs does not handle well (e.g. binary files for which the user has not specified a mode) should be opened in external programs by default. By default they should be opened with the program specified by the desktop environment (xdg-open, open, etc.). The user should also be able to open those files in a program he specified (either in their config or by calling a special function that presents them a list of programs that may be suitable, similar to their desktop environment).
- By default directories should be opened in dired. When the user calls a special command they can choose to open the directory in any other program (e.g. their file browser which we can do using xdg-open et al). They should also be able to open the file in a Terminal program (which may not be the default one).
Is it a problem that we may prevent the opening of arbitrary (possibly scripted) pdf files in Emacs?
Fuco1/dired-hacks/dired-open.el has a nice system determining how to open files. It's tighlty integrated into the hooks he uses but if maybe we can reuse it with some work and replace openwith-associations.
How does it behave over SSH?
Call dired-find-file using a hook.
Only attempt to call the chosen command when it is atually available. This way we effectively auto-disable ourself when opening likely won't work.
Replace openwith-desktop-environment-open with openwith-default-open

License

luisgerhorst/openwith

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