standardlint
v1.2.0
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Extensible standards linter and auditor.
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StandardLint 📏
Extensible standards auditing and linting tool. Nags like your mother but is probably a lot more technical.
With StandardLint, you use Checks to inform what standards you want to inspect, in effect being your standards yardstick:
A fact or standard by which you can judge the success or value of something. — Cambridge Dictionary
StandardLint makes it convenient and easy to set up guardrails and guidelines for development teams and making sure they follow your house conventions.
The result of a run could look like this:
✅ PASS: Diagrams
✅ PASS: Changelog
🛎️ No custom path assigned to check "Diagrams" - Using default path "diagrams"...
⚠️ WARN: Diagrams
✅ PASS: Lock files
✅ PASS: License
❌ FAIL: Code owners
❌ FAIL: Contribution information
🛎️ No custom path assigned to check "IAC configuration" - Using default path "serverless.yml"...
✅ PASS: IAC configuration
🛎️ No custom path assigned to check "SLOs" - Using default path "manifest.json"...
⚠️ WARN: SLOs
🛎️ No custom path assigned to check "Tags" - Using default path "manifest.json"...
✅ PASS: Tags
🛎️ No custom path assigned to check "CI configuration" - Using default path ".github/workflows/main.yml"...
✅ PASS: CI configuration
✅ PASS: Security information
🛎️ No custom path assigned to check "Service metadata" - Using default path "manifest.json"...
✅ PASS: Service metadata
Relation to projects like ESLint
The majority of StandardLint checks are meant to assess the overall architecture, for example presence of certain files or documentation. While StandardLint has a few checks that inspect code (throwing errors and using console
), the majority of such use cases are better handled with something like ESLint.
StandardLint GitHub Action
There's a ready-to-use StandardLint GitHub Action in the Marketplace if you really want the minimum hassle. Plus, you get a great visual overview of your checks!
Usage
Installation
Install StandardLint with npm install standardlint
.
Configuration
Before running StandardLint you need a configuration. This is a basic JSON file with the name standardlint.json
. Place it in the root of your project.
The format is:
{
"basePath": "",
"checks": [],
"defaultSeverity": ""
}
| Key | Required | Default | Example | Description |
| ----------------- | -------- | --------------- | ----------------------------------------- | ----------------------------------------------------------------------- |
| basePath
| No | .
| ./project_dir/
| Sets the base path for any file lookups. |
| ignorePaths
| No | []
| ["/tests/", "/src/problematic-file.ts"]
| Paths that will be ignored for some checks. Does not support globbing. |
| checks
| Yes | - | ["checkForPresenceLicense"]
| A list of checks to run, either using string or object form. |
| defaultSeverity
| No | error
| warn
| Sets the default severity level for any issues. |
| path
| No | Multiple values | api/schema.yml
| Sets the exact path to a resource. Only used optionally by some checks. |
Base path
If you for some reason keep your project files "lower" than in the root where you want to do file lookups, you can add this optional argument.
It's recommended you do not change this unless you know what you are doing.
Ignore paths
This provides the possibility to ignore certain paths.
These paths will be respected and discarded by the following checks:
checkForConsoleUsage
checkForPresenceTests
checkForThrowingPlainErrors
Checks
Checks can be provided in string form or object form:
- String format:
["checkForDefinedTags"]
- Object format:
[{ "name": "checkForPresenceContributing", "severity": "warn" }]
You need to use the object form if you want to override the overall severity level, and use the check's severity
level.
You can also combine the formats for different checks.
["checkForDefinedTags", { "name": "checkForPresenceContributing", "severity": "warn" }]
Some checks also provide the optional path
key. Use this when you want to override default values, for example to the location of an API schema.
[{ "name": "checkForPresenceApiSchema", "path": "api/schema.yml" }]
Default severity
This can be either warn
or error
(the default value). Using it in error
mode means that any failure will produce an error, while the warn
mode simply warns for any non-compliance.
Usage
From the command line
It's super easy to use StandardLint from the CLI! Just run npx standardlint
and it will use the configuration in your project.
Outputting results into a JSON file
To output the results into standardlint.results.json
, run npx standardlint --output
.
Importing StandardLint as a Node package
You can also import and use StandardLint like a conventional Node package.
It exposes a factory function to vend a new StandardLint
instance with a check()
method.
If using it as an imported package, you will need to provide either a configuration file (for example loaded with fs
) or the actual configuration as an object.
import { createNewStandardLint } from 'standardlint';
const config = {
checks: [
{ name: 'checkForPresenceContributing', severity: 'warn' },
{ name: 'checkForPresenceLicense', severity: 'error' }
]
};
const standardLint = createNewStandardLint(config);
const results = standardLint.check();
console.log(results);
Using static file trees instead of reading from disk
If you want to use a static representation of paths rather than actually checking on disk, then this is possible using the filetree
parameter.
const standardlint = createNewStandardLint(config, ['path/to/file.js']);
Outputting results into a JSON file
To output the results into standardlint.results.json
, run:
const standardLint = createNewStandardLint(config);
const results = standardLint.check(true); // <--- Adding true here will output the results to disk
Available checks
Service metadata definition checks assume you are using Catalogist or something with the same manifest file structure.
Any check with a default
value can be overridden using the path
argument.
all
Runs all checks.
checkForConflictingLockfiles
Checks if there are conflicting Node package lock files (i.e. both a Yarn lock file and an NPM lock file).
checkForConsoleUsage
Checks if console
is used, e.g. console.log()
and similar. This is useful when you want to ensure a more comprehensive logging approach is used.
Note that this uses a naive solution so even just a mention of console.log() (or similar) will fail this check.
Will respect ignorePaths
options.
Default: src
checkForDefinedRelations
Checks if the service metadata defines system relations.
Default: manifest.json
checkForDefinedServiceLevelObjectives
Checks if the service metadata defines Service Level Objectives.
Default: manifest.json
checkForDefinedTags
Checks if the service metadata defines tags.
Default: manifest.json
checkForPresenceApiSchema
Checks if there is an API schema.
Default: api/schema.json
checkForPresenceChangelog
Checks if there is a CHANGELOG.md
file.
checkForPresenceCiConfig
Checks if there is a CI/CD configuration file.
Default: .github/workflows/main.yml
checkForPresenceCodeowners
Checks if there is a CODEOWNERS
file.
checkForPresenceContributing
Checks if there is a CONTRIBUTING.md
file.
checkForPresenceDiagramsFolder
Checks if there is a diagrams folder with diagram files in it. The check assumes .drawio
files.
Default: diagrams
checkForPresenceIacConfig
Checks if there is Infrastructure-as-Code configuration present.
Default: serverless.yml
checkForPresenceLicense
Checks if there is a LICENSE.md
file.
checkForPresenceReadme
Checks if there is a README.md
file.
checkForPresenceSecurity
Checks if there is a SECURITY.md
file.
checkForPresenceServiceMetadata
Checks if there a service metadata file present.
Default: manifest.json
checkForPresenceTemplateIssues
Checks if there is a template for GitHub issues.
Default: .github/ISSUE_TEMPLATE/issue.md
checkForPresenceTemplatePullRequests
Checks if there is a template for GitHub Pull Requests.
Default: .github/ISSUE_TEMPLATE/pull_request.md
checkForPresenceTests
Checks if there are any tests in the provided location. This will match anything ending in (test|spec).(ts|js)
.
Default: tests
Will respect ignorePaths
options.
checkForThrowingPlainErrors
Checks if any file uses throw Error
or throw new Error
. This is meant to push toward the use of actual loggers, rather than plain console output.
Will respect ignorePaths
options.
Ideas for improvements
- Service metadata: Do you link to observability resources (logs/metrics/traces/dashboards etc.)?
- Support for external config