Nodelinter

Static code analyzer for n8n node files
by Iván Ovejero

Nodelinter is a static code analyzer for n8n node files, with ~70 linting rules for:

• default values based on param type,
• casing for display names and descriptions,
• alphabetization for params and options,
• required and optional key-value pairs,
• expected values for specific params,
• etc.

Operation

Run via npx:

npx nodelinter --target=/Users/john/n8n/packages/nodes-base/nodes/Stripe/Stripe.node.ts

Or run locally:

git clone https://github.com/n8n-io/nodelinter
cd nodelinter; npm i
npm run lint -- --target=/Users/john/n8n/packages/nodes-base/nodes/Stripe/Stripe.node.ts

Options

# lint a single file
--target=./packages/nodes-base/nodes/Stripe/Stripe.node.ts

# lint all files in a dir
--target=./packages/nodes-base/nodes/Stripe

# use a custom config
--config=/Users/john/Documents/myConfig.json

# print logs to lintOutput.json
--print

# lint files ending with these patterns
--target=./src/input/MyNode --patterns:.node.ts,Description.ts

# lint files ending with this pattern
--target=./src/input/MyNode --patterns:.node.ts

# lint only rules with error classification
--target=./src/input/MyNode --errors-only

Custom config

You can override the Nodelinter default config with a custom config.

To do so, create a JSON file containing any keys to overwrite:

{
  "target": "/Users/john/n8n/packages/nodes-base/nodes/Notion/Notion.node.ts",
  "patterns": [".node.ts"],
  "sortMethod": "lineNumber",
  "lintings": {
    "PARAM_DESCRIPTION_MISSING_WHERE_OPTIONAL": {
      "enabled": false
    },
    "NAME_WITH_NO_CAMELCASE": {
      "enabled": false
    }
  }
}

And use the --config option:

npx nodelinter --config=/Users/john/Documents/myConfig.json

For convenience, when running locally, if you place a custom config file named nodelinter.config.json anywhere inside the nodelinter dir, the custom config file will be auto-detected.

Lint exceptions

Add // nodelinter-ignore-next-line LINTING_NAME to except the next line from one or more specific lintings:

// nodelinter-ignore-next-line PARAM_DESCRIPTION_WITH_EXCESS_WHITESPACE
description: 'Time zone used in the response.    The default is the time zone of the calendar.',

// nodelinter-ignore-next-line PARAM_DESCRIPTION_WITH_EXCESS_WHITESPACE PARAM_DESCRIPTION_UNTRIMMED
description: 'Time zone used in the response.    The default is the time zone of the calendar.   ',

Or add // nodelinter-ignore-next-line to except the next line from all lintings:

// nodelinter-ignore-next-line
description: 'Time zone used in the response.    The default is the time zone of the calendar.',

Author

© 2021 Iván Ovejero

License

Distributed under the MIT License.