This document covers how you can contribute to ZenFS, as well as some choices ZenFS makes.
When opening an issue, write a short yet descriptive name for the title. For example, putting the first line of an error stack trace is not a descriptive title. You do not need to triage the issue or PR, a maintainer will give it the applicable tags.
Please copy logs, terminal output, and code into a code block in the issue or PR. Do not include screenshots since those are very difficult to debug.
- Avoid callback hell— this is why ZenFS uses
async/awaita lot. - Use guard clauses
- If you're more of a visual learner, this video is helpful: Why You Shouldn't Nest Your Code
- Don't use single letter variable names, with the exception of
iinforloops - Don't abbreviate in variable names
- Don't put types in variable names, it already has a type
- Don't put units in your variable names, but include units in documentation if the type does not abstract the unit
- Example #1: A variable
time: Datedoesn't need a unit (because ofDate) - Example #2: A variable
time: numberwill need a unit in documentation, since it could be seconds, minutes, etc.
- Example #1: A variable
- Don't put types in types, for example prefixing an interface name with "I"
- Don't name a class "Base" or "Abstract"
The Naming Things in Code video covers everything, though you should keep in mind:
- Units will go into documentation if they are needed
- Bend the utils recommendation since some code can't be attributed to some other piece of code, it really is just a utility.
For the different functions and variables, write a short description of what it does and how it should be used. I certainly haven't been the best about doing this, so if you find missing docs an issue or PR would be welcome.
ZenFS used npm rather than pnpm or yarn since it makes it easier for new contributors and simplifies tooling.
You can build the project with npm run build, or run watch mode with npm run dev.
ZenFS produces two builds: One using tsc, which is meant for almost all use cases, and esbuild which bundles the project into a single minified file for browsers.
You can automatically run formatting with the npm run format command
Tabs are used in formatting since they take up less space in files, in addition to making it easier to work with. You can't accidently click the wrong space then have to move around trying to delete the single tab width of indentation.
Trailing commas are used to reduce the amount of individual line changes in commits, which helps to improve clarity and commit diffs. For example:
const someObject = {
a: 1,
b: 2,
+ c: 3,
}
instead of
const someObject = {
a: 1,
- b: 2
+ b: 2,
+ c: 3
}
Other style choices are made to steamline the development process, making faster or more efficent. If you make changes to formatting, please make sure they make the development process better, not worse.
You can run tests with the npm test command.
Tests are located in the tests directory. They are written in Typescript to catch type errors, and test step-by-step using Jest. Suite names are focused around a set of features (directories, links, permissions, etc.) rather than specific functions or classes.
There is also a couple of very important files.
assignment.ts tests whether the exported fs is compatible with Node's exported fs module, which catches new feature additions.
common.ts provides the framework used for testing. It copys files from tests/fixtures to the virtual file system. These files probably aren't needed on their own, and could be generated at test runtime, though they work fine at the time of writing. I think the time spent making those changes could be better spent on actual features. common.ts also exports an fs module used by all the tests. In the future, I plan on making it possible to test different backends, which would be handled by common.ts