# Style Guides
Guides for coding (and writing) well, consistently and in style. “Style” covers a lot of ground, from “use camelCase for variable names” to “never use global variables” or “never start a sentence with but”.
These are living documents, and we encourage pull request and issues to improve it – or contest it. 😉
- HTML and CSS
- Web Apps
- Continuous Integration and Deployment
- Version Control
- Code Review
- Be consistent… And don’t rewrite existing code to follow this guide.
- Don’t violate a guideline without a good reason. (A reason is good when you can convince a teammate.)
- Tests are required. Unit tests, as well as functional and integration tests. Aiming for test coverage of 80% and above is desirable.
- Tests must be automated via a continuous integration platform that is triggered when code is pushed to the canonical repository.
- Documentation is required for all code. Documentation is just as important as tests.
- Document functions, classes, modules and packages with docstrings.
- Provide a great
README.mdfile with examples of how to use the code.
- Only use documentation builders like Sphinx for large projects; prefer
README.mdfiles for brevity and accessibility of documentation.
- Use spaces and never tabs.
- Python: 4 space indentation.
- Strictly enforce a 79 character line limit.
eslint; Lint Python using
- Use common language conventions for naming functions, classes and variables.
- Code should be submitted via pull requests, which another person should merge.
- Use continuous deployment.
- Apps should be deployed from a continuous integration service when a successful build is made on the branch used for production.
- Packages should be published to the respective package registry when a tag is pushed.
- Write small, reusable libraries where possible. There are many opportunities for reuse across our different products.
- We support modern browsers. Notably, IE 10 and above. Our browser support is in sync with the browser support of Google web properties, as declared here.
A note on our use of language:
- “Avoid” means don’t do it unless you have good reason.
- “Don’t” means there’s never a good reason.
- “Prefer” indicates a better option and its alternative to watch out for.
- “Use” is a positive instruction.
- “MUST”, “SHOULD”, etc. are used in classic RFC style.
For example apps that implement the Datopian preferences, see the following:
In the same way we have default choices for programming languages, we have for frameworks. These preferences exist after a thorough research concerning a common set of requirements in an average Datopian project.
Specific frameworks are covered per language.