## I Don't Want to Read This Whole Thing! I Just Have a Question!
-If you'd like to ask questions about QMK you can do so on the [OLKB Subreddit](https://reddit.com/r/olkb) or on [Gitter](https://gitter.im/qmk/qmk_firmware).
+If you'd like to ask questions about QMK you can do so on the [OLKB Subreddit](https://reddit.com/r/olkb) or on [Discord](https://discord.gg/Uq7gcHh).
Please keep these things in mind:
# Where Can I Go for Help?
-If you need help you can [open an issue](https://github.com/qmk/qmk_firmware/issues) or [chat on gitter](http://gitter.im/QMK/qmk_firmware).
+If you need help you can [open an issue](https://github.com/qmk/qmk_firmware/issues) or [chat on Discord](https://discord.gg/Uq7gcHh).
# How Do I Make a Contribution?
Most of our style is pretty easy to pick up on, but right now it's not entirely consistent. You should match the style of the code surrounding your change, but if that code is inconsistent or unclear use the following guidelines:
-* We indent using two spaces (soft tabs)
-* We use One True Brace Style
+* We indent using four (4) spaces (soft tabs)
+* We use a modified One True Brace Style
* Opening Brace: At the end of the same line as the statement that opens the block
* Closing Brace: Lined up with the first character of the statement that opens the block
* Else If: Place the closing brace at the beginning of the line and the next opening brace at the end of the same line.
* Optional Braces: Always include optional braces.
* Good: if (condition) { return false; }
* Bad: if (condition) return false;
-* We use C style comments: `/* */`
+* We encourage use of C style comments: `/* */`
* Think of them as a story describing the feature
* Use them liberally to explain why particular decisions were made.
* Do not write obvious comments
* If you not sure if a comment is obvious, go ahead and include it.
* In general we don't wrap lines, they can be as long as needed. If you do choose to wrap lines please do not wrap any wider than 76 columns.
+* We use `#pragma once` at the start of header files rather than old-style include guards (`#ifndef THIS_FILE_H`, `#define THIS_FILE_H`, ..., `#endif`)
+* We accept both forms of preprocessor if's: `#ifdef DEFINED` and `#if defined(DEFINED)`
+ * If you are not sure which to prefer use the `#if defined(DEFINED)` form.
+ * Do not change existing code from one style to the other, except when moving to a multiple condition `#if`.
+ * Do not put whitespace between `#` and `if`.
+ * When deciding how (or if) to indent directives keep these points in mind:
+ * Readability is more important than consistency.
+ * Follow the file's existing style. If the file is mixed follow the style that makes sense for the section you are modifying.
+ * When choosing to indent you can follow the indention level of the surrounding C code, or preprocessor directives can have their own indent level. Choose the style that best communicates the intent of your code.
+
+Here is an example for easy reference:
+
+```c
+/* Enums for foo */
+enum foo_state {
+ FOO_BAR,
+ FOO_BAZ,
+};
+
+/* Returns a value */
+int foo(void) {
+ if (some_condition) {
+ return FOO_BAR;
+ } else {
+ return -1;
+ }
+}
+```
+
+# Auto-formatting with clang-format
+
+[Clang-format](https://clang.llvm.org/docs/ClangFormat.html) is part of LLVM and can automatically format your code for you, because ain't nobody got time to do it manually. We supply a configuration file for it that applies most of the coding conventions listed above. It will only change whitespace and newlines, so you will still have to remember to include optional braces yourself.
+
+Use the [full LLVM installer](http://llvm.org/builds/) to get clang-format on Windows, or use `sudo apt install clang-format` on Ubuntu.
+
+If you run it from the command-line, pass `-style=file` as an option and it will automatically find the .clang-format configuration file in the QMK root directory.
+
+If you use VSCode, the standard C/C++ plugin supports clang-format, alternatively there is a [separate extension](https://marketplace.visualstudio.com/items?itemName=LLVMExtensions.ClangFormat) for it.
+
+Some things (like LAYOUT macros) are destroyed by clang-format, so either don't run it on those files, or wrap the sensitive code in `// clang-format off` and `// clang-format on`.
# General Guidelines
We have a few different types of changes in QMK, each requiring a different level of rigor. We'd like you to keep the following guidelines in mind no matter what type of change you're making.
-* Separate PR's into logical units. For example, do not submit one PR covering two separate features, instead submit a separate PR for each feature.
+* Separate PR's into logical units. For example, do not submit one PR covering two separate features, instead submit a separate PR for each feature.
* Check for unnecessary whitespace with `git diff --check` before committing.
* Make sure your code change actually compiles.
* Keymaps: Make sure that `make keyboard:your_new_keymap` does not return an error
You'll find all our documentation in the `qmk_firmware/docs` directory, or if you'd rather use a web based workflow you can click "Suggest An Edit" at the top of each page on http://docs.qmk.fm/.
+When providing code examples in your documentation, try to observe naming conventions used elsewhere in the docs. For example, standardizing enums as `my_layers` or `my_keycodes` for consistency:
+
+```c
+enum my_layers {
+ _FIRST_LAYER,
+ _SECOND_LAYER
+};
+
+enum my_keycodes {
+ FIRST_LAYER = SAFE_RANGE,
+ SECOND_LAYER
+};
+```
+
## Keymaps
Most first-time QMK contributors start with their personal keymaps. We try to keep keymap standards pretty casual (keymaps, after all, reflect the personality of their creators) but we do ask that you follow these guidelines to make it easier for others to discover and learn from your keymap.
-* Write a `readme.md` using [the template](https://docs.qmk.fm/documentation_templates.html#).
+* Write a `readme.md` using [the template](documentation_templates.md).
* All Keymap PR's are squashed, so if you care about how your commits are squashed you should do it yourself
* Do not lump features in with keymap PR's. Submit the feature first and then a second PR for the keymap.
* Do not include `Makefile`s in your keymap folder (they're no longer used)
-* Update copyrights in file headers (look for `REPLACE_WITH_YOUR_NAME `)
+* Update copyrights in file headers (look for `%YOUR_NAME%`)
## Keyboards
Keyboards are the raison d'être for QMK. Some keyboards are community maintained, while others are maintained by the people responsible for making a particular keyboard. The `readme.md` should tell you who maintains a particular keyboard. If you have questions relating to a particular keyboard you can [Open An Issue](https://github.com/qmk/qmk_firmware/issues) and tag the maintainer in your question.
-We also ask that you follow these guidelines:
+We also ask that you follow these guidelines:
-* Write a `readme.md` using [the template](https://docs.qmk.fm/documentation_templates.html#).
+* Write a `readme.md` using [the template](documentation_templates.md).
* Keep the number of commits reasonable or we will squash your PR
* Do not lump core features in with new keyboards. Submit the feature first and then submit a separate PR for the keyboard.
* Name `.c`/`.h` file after the immediate parent folder, eg `/keyboards/<kb1>/<kb2>/<kb2>.[ch]`
* Do not include `Makefile`s in your keyboard folder (they're no longer used)
-* Update copyrights in file headers (look for `REPLACE_WITH_YOUR_NAME `)
+* Update copyrights in file headers (look for `%YOUR_NAME%`)
## Quantum/TMK Core
-Before you put a lot of work into building your new feature you should make sure you are implementing it in the best way. You can get a basic understanding of QMK by reading [Understaning QMK](understanding_qmk.md), which will take you on a tour of the QMK program flow. From here you should talk to us to get a sense of the best way to implement your idea. There are two main ways to do this:
+Before you put a lot of work into building your new feature you should make sure you are implementing it in the best way. You can get a basic understanding of QMK by reading [Understanding QMK](understanding_qmk.md), which will take you on a tour of the QMK program flow. From here you should talk to us to get a sense of the best way to implement your idea. There are two main ways to do this:
-* [Chat on Gitter](https://gitter.im/qmk/qmk_firmware)
+* [Chat on Discord](https://discord.gg/Uq7gcHh)
* [Open an Issue](https://github.com/qmk/qmk_firmware/issues/new)
Feature and Bug Fix PR's affect all keyboards. We are also in the process of restructuring QMK. For this reason it is especially important for significant changes to be discussed before implementation has happened. If you open a PR without talking to us first please be prepared to do some significant rework if your choices do not mesh well with our planned direction.
* **Consider revisions and different chip-bases** - there are several keyboards that have revisions that allow for slightly different configurations, and even different chip-bases. Try to make a feature supported in ARM and AVR, or automatically disabled on platforms it doesn't work on.
* **Explain your feature** - Document it in `docs/`, either as a new file or as part of an existing file. If you don't document it other people won't be able to benefit from your hard work.
-We also ask that you follow these guidelines:
+We also ask that you follow these guidelines:
* Keep the number of commits reasonable or we will squash your PR
* Do not lump keyboards or keymaps in with core changes. Submit your core changes first.
-* Write [Unit Tests](http://docs.qmk.fm/unit_testing.html) for your feature
+* Write [Unit Tests](unit_testing.md) for your feature
* Follow the style of the file you are editing. If the style is unclear or there are mixed styles you should conform to the [coding conventions](#coding-conventions) above.
## Refactoring
projects / qmk_firmware.git / blobdiff