Add PR checklist document. (#9913)
* Add PR checklist document. * Update docs/pr_checklist.md Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: Ryan <fauxpark@gmail.com> * Reword the lower/raise/adjust suggestion somewhat for clarity. * Add suggestion from @Didel for coding conventions. Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com> Co-authored-by: Ryan <fauxpark@gmail.com>
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Nick Brassel
GitHub
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<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
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<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
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- [ ] My code follows the code style of this project.
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- [ ] My code follows the code style of this project: [**C**](https://docs.qmk.fm/#/coding_conventions_c), [**Python**](https://docs.qmk.fm/#/coding_conventions_python)
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- [ ] I have read the [**PR Checklist** document](https://docs.qmk.fm/#/pr_checklist) and have made the appropriate changes.
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- [ ] My change requires a change to the documentation.
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- [ ] I have updated the documentation accordingly.
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- [ ] I have read the [**CONTRIBUTING** document](https://docs.qmk.fm/#/contributing).
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* [Velocikey](feature_velocikey.md)
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* Developing QMK
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* [PR Checklist](pr_checklist.md)
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* Breaking Changes
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* [Overview](breaking_changes.md)
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* [My Pull Request Was Flagged](breaking_changes_instructions.md)
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# PR checklists
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This is a non-exhaustive checklist of what the QMK collaborators will be checking when reviewing submitted PRs.
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If there are any inconsistencies with these recommendations, you're best off [creating an issue](https://github.com/qmk/qmk_firmware/issues/new) against this document, or getting in touch with a QMK Collaborator on Discord.
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## General PRs
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- PR should be submitted using a non-`master` branch on the source repository
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- This does not mean you target a different branch for your PR, rather that you're not working out of your own master branch
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- If submitter _does_ use their own `master` branch, they'll be given a link to the ["how to git"](https://docs.qmk.fm/#/newbs_git_using_your_master_branch) page after merging -- (end of this document will contain the contents of the message)
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- Newly-added directories and filenames must be lowercase
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- This rule may be relaxed if upstream sources originally had uppercase characters (e.g. ChibiOS, or imported files from other repositories etc.)
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- If there is enough justification (i.e. consistency with existing core files etc.) this can be relaxed
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- a board designer naming their keyboard with uppercase letters is not enough justification
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- Valid license headers on all `*.c` and `*.h` source files
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- GPL2/GPL3 recommended for consistency
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- Other licenses are permitted, however they must be GPL-compatible and must allow for redistribution. Using a different license will almost certainly delay a PR getting merged.
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- QMK codebase "best practices" followed
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- This is not an exhaustive list, and will likely get amended as time goes by
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- `#pragma once` instead of `#ifndef` include guards in header files
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- No "old-school" GPIO/I2C/SPI functions used -- must use QMK abstractions unless justifiable (and laziness is not valid justification)
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- Timing abstractions should be followed too:
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- `wait_ms()` instead of `_delay_ms()` (remove `#include <util/delay.h>` too)
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- `timer_read()` and `timer_read32()` etc. -- see [timer.h](https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/timer.h) for the timing APIs
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- If you think a new abstraction is useful, you're encouraged to:
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- prototype it in your own keyboard until it's feature-complete
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- discuss it with QMK Collaborators on Discord
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- refactor it as a separate core change
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- remove your specific copy in your board
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## Core PRs
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- Must now target `develop` branch, which will subsequently be merged back to `master` on the breaking changes timeline
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- Other notes TBD
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- Core is a lot more subjective given the breadth of posted changes
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## Keyboard PRs
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Closed PRs (for inspiration, previous sets of review comments will help you eliminate ping-pong of your own reviews):
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https://github.com/qmk/qmk_firmware/pulls?q=is%3Apr+is%3Aclosed+label%3Akeyboard
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- `info.json`
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- valid URL
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- valid maintainer
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- displays correctly in Configurator (press Ctrl+Shift+I to preview local file, turn on fast input to verify ordering)
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- `readme.md`
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- standard template should be present
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- flash command has `:flash` at end
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- valid hardware availability link (unless handwired) -- private groupbuys are okay, but one-off prototypes will be questioned. If open-source, a link to files should be provided.
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- `rules.mk`
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- removed `MIDI_ENABLE`, `FAUXCLICKY_ENABLE` and `HD44780_ENABLE`
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- modified `# Enable Bluetooth with the Adafruit EZ-Key HID` -> `# Enable Bluetooth`
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- No `(-/+size)` comments related to enabling features
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- Remove the list of alternate bootloaders if one has been specified
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- No re-definitions of the default MCU parameters if same value, when compared to the equivalent MCU in [mcu_selection.mk](https://github.com/qmk/qmk_firmware/blob/master/quantum/mcu_selection.mk)
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- keyboard `config.h`
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- don't repeat `MANUFACTURER` in the `PRODUCT` value
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- no `#define DESCRIPTION`
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- no Magic Key Options, MIDI Options or HD44780 configuration
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- user preference configurable `#define`s need to be moved to keymap `config.h`
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- "`DEBOUNCE`" instead of "`DEBOUNCING_DELAY`"
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- bare minimum required code for a board to boot into QMK should be present
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- initialisation code for the matrix and critical devices
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- mirroring existing functionality of a commercial board (like custom keycodes and special animations etc.) should be handled through non-`default` keymaps
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- `keyboard.c`
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- empty `xxxx_xxxx_kb()` or other weak-defined default implemented functions removed
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- commented-out functions removed too
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- `matrix_init_board()` etc. migrated to `keyboard_pre_init_kb()`, see: [keyboard_pre_init*](https://docs.qmk.fm/#/custom_quantum_functions?id=keyboard_pre_init_-function-documentation)
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- prefer `CUSTOM_MATRIX = lite` if custom matrix used, allows for standard debounce, see [custom matrix 'lite'](https://docs.qmk.fm/#/custom_matrix?id=lite)
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- `keyboard.h`
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- `#include "quantum.h"` appears at the top
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- `LAYOUT` macros should use standard definitions if applicable
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- Use the Community Layout macro names where they apply (preferred above `LAYOUT`/`LAYOUT_all`)
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- keymap `config.h`
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- no duplication of `rules.mk` or `config.h` from keyboard
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- `keymaps/default/keymap.c`
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- `QMKBEST`/`QMKURL` removed (sheesh)
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- If using `MO(_LOWER)` and `MO(_RAISE)` keycodes or equivalent, and the keymap has an adjust layer when holding both keys -- if the keymap has no "direct-to-adjust" keycode (such as `MO(_ADJUST)`) then you should prefer to write...
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```
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layer_state_t layer_state_set_user(layer_state_t state) {
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return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
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}
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```
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...instead of manually handling `layer_on()`, `update_tri_layer()` inside the keymap's `process_record_user()`.
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- default (and via) keymaps should be "pristine"
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- bare minimum to be used as a "clean slate" for another user to develop their own user-specific keymap
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- standard layouts preferred in these keymaps, if possible
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- submitters can have a personal (or bells-and-whistles) keymap showcasing capabilities in the same PR but it shouldn't be embedded in the 'default' keymap
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- submitters can also have a "manufacturer-matching" keymap that mirrors existing functionality of the commercial product, if porting an existing board
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Also, specific to ChibiOS:
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- **Strong** preference to using existing ChibiOS board definitions.
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- A lot of the time, an equivalent Nucleo board can be used with a different flash size or slightly different model in the same family
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- Example: For an STM32L082KZ, given the similarity to an STM32L073RZ, you can use `BOARD = ST_NUCLEO64_L073RZ` in rules.mk
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- QMK is migrating to not having custom board definitions if at all possible, due to the ongoing maintenance burden when upgrading ChibiOS
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- If a board definition is unavoidable, `board.c` must have a standard `__early_init()` (as per normal ChibiOS board defs) and an empty `boardInit()`:
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- see Arm/ChibiOS [early initialization](https://docs.qmk.fm/#/platformdev_chibios_earlyinit?id=board-init)
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- `__early_init()` should be replaced by either `early_hardware_init_pre()` or `early_hardware_init_post()` as appropriate
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- `boardInit()` should be migrated to `board_init()`
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## Keymap PRs
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- `#include QMK_KEYBOARD_H` preferred to including specific board files
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- Prefer layer `enum`s to `#define`s
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- Require custom keycode `enum`s to `#define`s, first entry must have ` = SAFE_RANGE`
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- Terminating backslash (`\`) in lines of LAYOUT macro parameters is superfluous
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- Some care with spacing (e.g., alignment on commas or first char of keycodes) makes for a much nicer-looking keymap
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---
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## Notes
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For when people use their own `master` branch, post this after merge:
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```
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For future reference, we recommend against committing to your `master` branch as you've done here, because pull requests from modified `master` branches can make it more difficult to keep your QMK fork updated. It is highly recommended for QMK development – regardless of what is being done or where – to keep your master updated, but **NEVER** commit to it. Instead, do all your changes in a branch (branches are basically free in Git) and issue PRs from your branches when you're developing.
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There are instructions on how to keep your fork updated here:
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[**Best Practices: Your Fork's Master: Update Often, Commit Never**](https://docs.qmk.fm/#/newbs_git_using_your_master_branch)
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[Fixing Your Branch](https://docs.qmk.fm/#/newbs_git_resynchronize_a_branch) will walk you through fixing up your `master` branch moving forward. If you need any help with this just ask.
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Thanks for contributing!
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```
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