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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


Patches
-------

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

    hut@hut.pm

or open a pull request on GitHub.


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
'>354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614