Guidelines for Code Modification
================================

Coding Style
------------

* Use syntax compatible to both python 2.6+ and 3.1+.
* Use docstrings with pydoc in mind
* Follow the style guide for python code:
    http://www.python.org/dev/peps/pep-0008/
* Test the code with "doctest" where it makes sense
* 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

    hut@hut.pm

or open a pull request on GitHub.

Please use PGP-encryption for security-relevand patches or messages.  The UIDs
of my key are `huterich <hut@lavabit.com>` and `hut <hut@hut.pm>`, 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/browserview.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.  Make sure to sort in the new entry
  alphabetically.
* 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 (hut@hut.pm) 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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```