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https://github.com/atlassian/stricter
A project-wide js-linting tool
https://github.com/atlassian/stricter
Last synced: 22 days ago
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A project-wide js-linting tool
- Host: GitHub
- URL: https://github.com/atlassian/stricter
- Owner: atlassian
- License: mit
- Created: 2017-10-20T13:15:27.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2024-04-29T20:01:26.000Z (8 months ago)
- Last Synced: 2024-05-02T12:41:00.592Z (7 months ago)
- Language: TypeScript
- Size: 6 MB
- Stars: 157
- Watchers: 9
- Forks: 12
- Open Issues: 36
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
Awesome Lists containing this project
- jimsghstars - atlassian/stricter - A project-wide js-linting tool (TypeScript)
README
# stricter
[](https://renovatebot.com/)
[](https://travis-ci.org/atlassian/stricter)
[](https://www.npmjs.com/package/stricter)
[](https://coveralls.io/github/atlassian/stricter?branch=master)
A project-wide js-linting tool
# Installation
```
yarn add stricter --dev
```
# Usage
```
yarn stricter
```
You can run `yarn stricter --help` for help.
# Configuration
Stricter uses `stricter.config.js` to read configuration.
The configuration file will be resolved starting from the current working directory location, and searching up the file tree until a config file is (or isn't) found.
## Sample configuration
```javascript
module.exports = {
root: 'src',
rulesDir: 'rules',
exclude: /\.DS_Store/,
plugins: ['tangerine'],
resolve: {
modules: [path.resolve(__dirname, 'src'), 'node_modules'],
},
rules: {
'hello-world-project': {
level: 'error'
},
'stricter/unused-files': [{
level: 'warning',
include : [/foo\.*/, /bar\.*/],
exclude : (i) => i.includes('testFolder'),
config: {
entry: [
/foo\.eslintrc\.js/,
/foo\.*\.md/,
/foo\/bar\/index\.js/,
/foo\/baz\/index\.js/,
],
relatedEntry: [
/foo\.*spec\.js/,
/foo\.*test\.js/,
/foo\.*story\.js/,
]
}
}],
'stricter/circular-dependencies': [{
level: 'error',
config: {
checkSubTreeCycle: true,
registries: ['**/foo/bar', 'baz'],
},
}],
'tangerine/project-structure': {
level: 'error',
config: { ... },
}
}
}
```
## Description
`root` - `string` required, root folder for the project.
`rulesDir` - `string | string[]`, folder(s), containing custom rules. Rule files need to follow naming convention `.rule.js`. They will be available for configuration as ``.
`exclude` - `RegExp | RegExp[] | Function`, regular expressions to exclude files, uses relative path from root or function accepting relative path and returning boolean
`plugins` - `string[]`, packages that contain third-party rule definitions that you can use in `rules`. See [Plugins](#Plugins) for more details.
`resolve` - `Object`, if you are using webpack, and you want to pass custom resolution options to `stricter`, the options are passed from the `resolve` key of your webpack configuration.
`rules` - required, an object containing configuration for rules.
The keys should be rule names and values should be an object, array of objects or a function. Arrays will result in the rule being executed once per each entry in the array, see [rule functions](#rule-functions) for more info on that syntax. The objects (`RuleObject`) should be of the form:
- `level` - `error | warning | off`, log level
- `include` - `RegExp | RegExp[] | Function`, regular expressions to match files, uses relative path from root or function accepting relative path and returning boolean
- `exclude` - `RegExp | RegExp[] | Function`, regular expressions to exclude from matched files, uses relative path from root or function accepting relative path and returning boolean
- `config` - `any`, config to be passed into rule
`packages` - `string[]`, an array of globs that match paths to packages if you are in a multi-package repo. This can be used to override the default list of packages that are provided to rules configured using a [function](#rule-functions).
### Rule functions
The default way of configuring rules is to provide objects, however, each rule value may also be a function that returns an object instead.
This provides an easy way to configure rules designed to be executed against each package separately in a monorepo.
Signature: `(args: { packages: string[] }) => RuleObject | RuleObject[]`
where `packages` is a list of package directory paths in your project that are automatically detected by searching for package.json's in sub-directories, i.e. `*/**/package.json`.
To override where `packages` are searched, you can use the top-level `packages` config to provide an array of globs instead. For example, this could be sourced from the yarn workspaces field in your project's root package.json.
E.g.
```js
module.exports = {
...
rules: {
'package-structure': ({ packages }) => packages.map(pkg => ({
level: 'error',
config: {
pkgRoot: pkg,
},
})),
'rule-that-does-not-need-to-execute-multiple-times': {
level: 'error',
...
}
},
...
}
```
Here, the `package-structure` rule enforces a specific structure for a package and takes the root path of the package as a config argument. In a single-package repo, the `rule` can just use the object syntax and specify the root path of the project as the package root.
However, in a multi-package repo this rule should be executed against each package separately rather than once at the root of the project so the function syntax can be used.
# Default rules
## stricter/circular-dependencies
Checks for circular dependencies in the code. Has a configuration to additionally check for cycles on folder level with ability to exclude particular directory from check by providing path to it in registries.
```
'stricter/circular-dependencies': {
config: {
checkSubTreeCycle: Boolean, // true to check for folder-lever cycles
registries?: string[] | string, // Optional: values should be a glob
}
}
```
## stricter/unused-files
Checks for unused files.
`entry` - application entry points. Usually these files are mentioned in `entry` part of webpack config or they are non-js files you want to keep (configs, markdown, etc.)
`relatedEntry` - related entry points, they are considered used only if any of its dependencies are used by an `entry` or its transitive dependencies. Usually these are tests and storybooks.
```
'stricter/unused-files': {
config: {
entry: RegExp | RegExp[] | Function; // if function, will get file path as an argument
relatedEntry: RegExp | RegExp[] | Function; // if function, will get file path as an argument
}
}
```
# Custom rules
A rule is a javascript module that exports an object that implements the following interface
```typescript
interface RuleDefinition {
onProject: ({
config?: { [prop: string]: any; };
dependencies: {
[fileName: string]: string[];
};
files: {
[fileName: string]: {
ast?: () => any;
source?: string;
};
};
rootPath: string;
include?: RegExp | RegExp[] | Function;
exclude?: RegExp | RegExp[] | Function;
}) => (string | { message: string; fix?: () => void; })[];
}
```
`onProject` will be called once with `files` and `dependencies` calculated for current project.
`rootPath` is an absolute path to project root.
`config` is an optional object that may be specifified in configuration.
`onProject` should return an array of objects, describing violations and their fixes, or an empty array if there is none.
`include` value of `include` from the rule
`exclude` value of `exclude` from the rule
# CLI
```
Options:
--help Show help [boolean]
--version Show version number [boolean]
--config, -c Specify config location [string]
--reporter, -r Specify reporter [choices: "console", "mocha", "junit"]
--rule Verify particular rule [array]
--clearCache Clears cache
--fix Apply fixes for rule violations
```
# Plugins
Stricter supports consuming rule definitions from other packages by specifying them in the `plugins` field of your stricter config.
The package names of plugins must be named `stricter-plugin-`, e.g. `stricter-plugin-tangerine`. This guarantees unique
rule names across different plugins.
## Configuration
In the `plugins` field, you can specify the plugin using its short name `` or its long form `stricter-plugin-`. You can then
enable and configure rules from a plugin by specifying the rules in the `rules` field.
When configuring rules from a plugin, they must be prefixed by their short plugin name `/`, e.g. `tangerine/project-structure`.
e.g.
```js
// stricter.config.js
module.exports = {
root: '.',
plugins: ['tangerine'],
rules: {
'tangerine/project-structure': {
level: 'error',
config: {...},
}
}
}
```
## Creating plugins
To create a stricter plugin, ensure the package name is of the format `stricter-plugin-`.
The main file of the package should then export a `rules` key that contains the rule definitions you wish to provide.
e.g.
```js
module.exports = {
rules: {
'project-structure': {
onProject: (...) => {...}
},
'another-rule': {
onProject: (...) => {...}
}
}
}
```
Note that the rule names should not be prefixed when defining them inside the plugin, they are only prefixed when specifying them in configuration.
## Pre-configured plugin rules
Rules provided by a plugin are not enabled by default, they must be configured by the end-user. If you would like to provide a preset configuration of rules provided by your plugin, simply export your preset configuration under a certain key. Consumers can then import that configuration and spread it into the `rules` field of their stricter config.
E.g.
### Plugin
```js
// stricter-plugin-tangerine/index.js
module.exports = {
// This key can be arbitrarily named
config: {
'tangerine/project-structure': {
level: 'error',
config: {
'.': {
'package.json': { type: 'file' },
'src': { type: 'dir' }
}
}
}
},
rules: {
'project-structure': {
onProject: (...) => {...}
},
}
}
```
### Stricter config
```js
// stricter.config.js
// This import key `config` must match what is exported by the plugin
const { config: tangerineConfig } = require('stricter-plugin-tangerine');
module.exports = {
root: '.',
plugins: ['tangerine'],
rules: {
...tangerineConfig,
},
};
```
# Exposed utilities
## parseDependencies
Parses files and returns an object, containing filenames as keys and array of their dependencies as values.
```js
const parseDependencies = (
files: string[],
{ useCache = false, resolve = {} } = { useCache: false, resolve: {} }
): {
[fileName: string]: string[];
}
```
`useCache` - pass `true` to leverage `stricter` filesystem cache
`resolve` - `Object`, if you are using webpack, and you want to pass custom resolution options to `stricter`, the options are passed from the `resolve` key of your webpack configuration
usage:
```js
const { parseDependencies } = require('stricter');
const dependencies = parseDependencies(['foo.js', 'bar.js']);
```
# Debugging
It helps to use `src/debug.ts` as an entry point for debugging.
A sample launch.json for VS Code might look like
```json
{
"version": "0.2.0",
"configurations": [
{
"name": "Current TS File",
"type": "node",
"request": "launch",
"args": ["${relativeFile}"],
"env": { "TS_NODE_FILES": "true" },
"runtimeArgs": ["-r", "ts-node/register"],
"cwd": "${workspaceRoot}"
}
]
}
```