HACKING.md

Guidelines for Code Modification

Coding Style

• Use syntax compatible with Python 2.6+ and 3.1+.
• Use docstrings with pydoc in mind
• Follow the PEP8 style guide: https://www.python.org/dev/peps/pep-0008/
• Always run make test before submitting a new PR. pylint, flake8, pytest, doctest and shellcheck need to be installed. (If you don't change any shell scripts you can run make test_py and you don't need the shellcheck dependency but it's an awesome tool, so check it out : )
• When breaking backward compatibility with old configuration files or plugins, please include a temporary workaround code that provides a compatibility layer and mark it with a comment that includes the word COMPAT. For examples, grep the code for the word COMPAT. :)

Patches

Send patches, created with git format-patch, to the email address

[email protected]

or open a pull request on GitHub.

Please use PGP-encryption for security-relevant patches or messages. The UIDs of my key are huterich <[email protected]> and hut <[email protected]>, my fingerprint is 1E9B 36EC 051F F6F7 FFC9 69A7 F08C E1E2 00FB 5CDF and my full pubkey is at the very bottom of this file.

Version Numbering

Three numbers, A.B.C, where

• A changes on a rewrite
• B changes when major configuration incompatibilities occur
• C changes with each release

Starting Points

Good places to read about ranger internals are:

• ranger/core/actions.py
• ranger/container/fsobject.py

About the UI:

• ranger/gui/widgets/browsercolumn.py
• ranger/gui/widgets/view_miller.py
• ranger/gui/ui.py

Common Changes

Adding options

• Add a default value in rc.conf, along with a comment that describes the option.
• Add the option to the ALLOWED_SETTINGS dictionary in the file ranger/container/settings.py in alphabetical order.
• Add an entry in the man page by editing doc/ranger.pod, then rebuild the man page by running make man in the ranger root directory

The setting is now accessible with self.settings.my_option, assuming self is a subclass of ranger.core.shared.SettingsAware.

Adding colorschemes

• Copy ranger/colorschemes/default.py to ranger/colorschemes/myscheme.py and modify it according to your needs. Alternatively, create a subclass of ranger.colorschemes.default.Default and override the use method, as it is done in the Jungle colorscheme.

• Add this line to your ~/.config/ranger/rc.conf: set colorscheme myscheme

Change which programs start which file types

Edit the configuration file ~/.config/ranger/rifle.conf. The default one can be obtained by running ranger --copy-config rifle.

Change which file extensions have which mime type

Modify ranger/data/mime.types. You may also add your own entries to ~/.mime.types

Change which files are previewed in the auto preview

In ranger/container/file.py, change the constant PREVIEW_BLACKLIST

PGP key

You may wish to send the author ([email protected]) PGP-encrypted mails for security-relevant messages. This is the authors key. Save everything from the BEGIN PGP PUBLIC KEY BLOCK up until the END PGP PUBLIC KEY BLOCK message into a file and import it with gpg --import <filename>.

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