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Update Contributing Guide (#832)

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* Update Contributing Guide
* Minor improvements to README and CONTRIBUTING
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Veronica Berglyd Olsen
2021-07-17 17:27:38 +02:00
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CONTRIBUTING.md
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# Contributing Guide # Contributing Guide
When contributing to this repository, please first discuss the change you wish to make via the When contributing to this repository, please first discuss the change you wish to make via the
issue tracker or the discussions page with the owner of this repository before making a change. If issue tracker or the discussions page with the owner of this repository. Especially if it is
you just want to make a minor correction, like fix a typo or similar, feel free to just make a pull regarding new features. If you just want to make a minor correction, like fix a typo or similar,
request directly. feel free to just make a pull request directly.
## Branching Structure The following contributions are welcome:
This project mainly follows the OneFlow branching structure. The `main` branch is the default * Bugfixes for new or existing bugs. Please also report new bugs in the issue tracker even if you
branch. If your contribution is a bugfix for a specific version, please make a bugfix branch from also provide a fix. It makes it easier to keep track of what has been fixed and when.
the tag you want the fix to be applied to. For other changes, make a feature branch from the * New translations. You can read more about contributing translations
current `main` branch. [here](https://github.com/vkbo/novelWriter/blob/main/i18n/README.md).
* Improvements to the documentation. Particularly if the documentation is unclear. Please don't
make any larger changes to the documentation without discussing if with the maintainer first.
* Adaptations, installation or packaging features targeting specific operating systems.
## Pull Request Process Please do not:
1. Make sure your code passes all tests and conforms to the style guide. You can check that the * Make a pull request that restructures or reformats existing code. If you think some parts of the
code conforms by running `flake8` from the root of the project folder. The same check is also code could be improved, please make an issue thread or start a discussion. The same applies to
run on pull requests by the maintainer. any text document in the repository.
2. Please provide a complete description of the changes in the pull request, and a summary that can
be copied into the [CHANGELOG](CHANGELOG.md). Remember to reference any issue related by ## Pull Requests
providing the issue number.
3. Do not change the version number. Version numbers are bumped in separate release pull requests This project follows the [OneFlow](https://www.endoflineblog.com/oneflow-a-git-branching-model-and-workflow)
by the maintainer. model. The `main` branch is the default branch. For general changes, please make a new branch in
your own fork from the current `main` branch. Do not make pull requests from your own `main`
branch.
**Note:** If your contribution is a bugfix for a specific version, please make a bugfix branch from
the tag you want the fix to be applied to, not directly from the `main` branch. This is important.
Also check the following:
* Make sure your code passes all tests and conforms to the style guide. You can check that the
code generally conforms by running the Python linting tool `flake8` from the root of the project
folder, although it doesn't check everything. The same check is also run on pull requests by the
maintainer.
* Please provide a description of the changes in the pull request under the summary section of the
pull request template, and reference any related issues by providing the issue number.
* Do not change the version number.
* Do not submit files that were not actively changed but have otherwise been modifed. This is
mostly an issue with translation files. The language tool may update all files in the `i18n`
folder.
## Code of Conduct ## Code of Conduct
@@ -40,29 +61,42 @@ Please see the [CODE_OF_CONDUCT](CODE_OF_CONDUCT.md) file for the full text.
## Code Style Guide ## Code Style Guide
The source code of novelWriter broadly follows the [PEP8](https://www.python.org/dev/peps/pep-0008) The source code of novelWriter broadly follows the [PEP8](https://www.python.org/dev/peps/pep-0008)
style guide, but with a few modifications and exceptions listed below. style guide, but with a few exceptions. Some key points are listed below.
### Line Length **Line Length:**
For this project, source lines should stay within the 79 and 99 character limits described by PEP8. * Source code lines can extend to the upper limit of 99 characters allowed by PEP8. 79 characters
79 characters is often too restrictive, so 99 character lines are acceptable when that is more is the recommended line length in PEP8, but this is often too restrictive. 99 characters are
practical. Readability has priority. Generally, if a code statement requires multiple lines, the acceptable when that is more practical. Readability has priority. Generally, if a code statement
lines should wrap at 79 characters, not 99. If wrapping can be avoided by going to 99, then that is requires multiple lines, the lines should wrap at 79 characters if possible. If wrapping can be
generally preferrable. avoided by going to 99, then that is generally preferrable.
* For text files, the text should be wrapped at 99 character. The exception is markdown image tags
and urls which can run past that limit.
For text files, the text should also be wrapped at 99 character. The exception is markdown image **Variable and Function Names**
tags and urls which can run past that limit.
Please do not submit pull requests that re-wrap existing source or text unless this has been * PEP8 allows for camelCase for consistency with existing code. The Qt library uses camelCase, so
discussed beforehand. the Python the source code does too.
* The exception to the above is for constants. They should always be in upper snake case, like PEP8
states.
**Spaces, Indentation and Alignment**
* Only indentation by 4 spaces is allowed.
* No trailing spaces should occur on any line in the source code, including empty lines.
* Ideally, a function should end on the same indention level as it started. Exceptions are allowed
if it makes the code easier to follow.
* Aligning operators and attributes in columns with multiple spaces is not allowed by PEP8. The
rule is relaxed a bit here. Alignment is allowed when populating large dictionaries or setting
many class attributes. It does improve readability in such cases, but should not be overused.
### Linting with `flake8` ### Linting with `flake8`
An excellent tool for checking Python code for errors and coding style is `flake8`. The A good tool for checking Python code for errors and code style is `flake8`. The documentation is
documentation is available [here](https://flake8.pycqa.org/en/latest/). available [here](https://flake8.pycqa.org/en/latest/).
The `setup.cfg` file in the root of this project has the following settings for `flake8` that The `setup.cfg` file in the root of this project has the following settings for `flake8` that
matches the coding standard: matches the above code style:
```conf ```conf
[flake8] [flake8]
ignore = E221,E226,E228,E241 ignore = E221,E226,E228,E241
@@ -75,38 +109,15 @@ The command line equivalent, with reporting, is:
flake8 . --count --ignore E221,E226,E228,E241 --max-line-length=99 --show-source --statistics flake8 . --count --ignore E221,E226,E228,E241 --max-line-length=99 --show-source --statistics
``` ```
Passing this check is required before contributions are merged into the `main` branch. This is Passing this check is required before contributions are merged. This is checked automatically when
checked automatically when you make a pull request. You can run the `flake8` command locally to you make a pull request. You can run the `flake8` command locally to check beforehand. The full
check beforehand. The full command will give you a detailed description of the code lines that do command will give you a detailed description of the code lines that do not conform to the standard.
not conform to the standard.
### Ignored Errors Two of the ignored errors are due to the relaxed restriction on column alignment, these are the
E221 and E241 error codes.
Some `flake8` error codes are ignored for this project for various reasons. The source also uses The code E226 is ignored becuse it doesn't actually follow the
camelCase function and variable names. This is the standard for the Qt libraries novelWriter
integrates with. It also happens to be the author's personal preferences. (Yay!)
The reason behind the other ignored error codes are listed below. Two of them are due to PEP8 not
permitting column alignment as opposed to many other coding styles, like for instance for Go. I
find them useful in regions of bulk value assignments. There's a reason why tables are more
readable than lists. They should be used sparingly though. If you're unsure, follow PEP8.
The ignored errors are all `pycodestyle` errors, and they are documented
[here](https://pycodestyle.pycqa.org/en/latest/intro.html#error-codes).
**E221:** multiple spaces before operator
**Reason:** Column alignment.
**E226:** missing whitespace around arithmetic operator
**Reason:** This doesn't actually follow the
[PEP8 recommendation](https://www.python.org/dev/peps/pep-0008/#other-recommendations) [PEP8 recommendation](https://www.python.org/dev/peps/pep-0008/#other-recommendations)
of grouping longer equations by operator precedence like `2*a + 3*b` instead of `a * a + 3 * b`. of grouping longer equations by operator precedence like `2*a + 3*b` instead of `a * a + 3 * b`.
Generally, don't use spaces around `*`, `/` and `**`, but _do_ use spaces around `+` and `-`. Generally, don't use spaces around `*`, `/` and `**`, but _do_ use spaces around `+` and `-`.
For appending strings, the spaces can be dropped. Don't use the `+` operator for appending multiple The same applies to the modulo operator `%`, hence E228 is also ignored.
strings. Use formatting instead.
**E228** missing whitespace around modulo operator
**Reason:** See reason for E226. Formatting `%` like `/` and `*` should be possible.
**E241:** multiple spaces after ‘,’
**Reason:** Column alignment.
README.md
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Please don't make feature pull requests without first having discussed them with the maintainer. Please don't make feature pull requests without first having discussed them with the maintainer.
You can make a feature request in the issue tracker, or if the idea isn't fully formed, start a You can make a feature request in the issue tracker, or if the idea isn't fully formed, start a
discussion on the discussion page. Fixes and patches are welcome. So are new translations. discussion on the discussion page. Please also don't make pull requests to reformat or rewrite
Contributions related to packaging and installing novelWriter will also be appreciated. existing code unless there is a very good reason for doing so.
If you want to help translating novelWriter into another language, please see the Fixes and patches are welcome. Contributions related to packaging and installing novelWriter will
[README](https://github.com/vkbo/novelWriter/blob/main/i18n/README.md) in the `nw/assets/i18n` also be appreciated, but please make an issue or a discussion topic first. Before contributing any
folder for further details. code, please read the full [Contributing Guide](https://github.com/vkbo/novelWriter/blob/main/CONTRIBUTING.md).
Before contributing any code, please read the full New translations are always welcome. Please read the additional
[Contributing Guide](https://github.com/vkbo/novelWriter/blob/main/CONTRIBUTING.md). [instructions](https://github.com/vkbo/novelWriter/blob/main/i18n/README.md) for further details.
## Key Features ## Key Features