Biome Ignore Bug Reproduction

This repository contains a minimal reproduction of a bug in Biome where CSS linting ignores are not respected in CLI commands, despite working correctly in the IDE.

Project Structure

This is a simple node project with the following key parts:

• src/style.css - Contains CSS with both regular linting errors and ignored errors
• biome.json - Local configuration that extends a global organization-wide config
• base-config/ - Contains the organization's base Biome configuration
• base-config/plugins/ - Custom Biome plugins used across projects

Configuration Structure

Our Biome configuration is designed to work across multiple projects in the organization:

1. The local biome.json extends a base configuration:

   {
     "$schema": "./node_modules/@biomejs/biome/configuration_schema.json",
     "extends": ["./base-config/biome.json"]
   }

2. The base-config/biome.json contains organization-wide rules and settings

3. Custom plugins (like the noManualZIndex rule) are defined in the base-config/plugins/ directory

Bug Description

When using the biome-ignore comment directive in a CSS file, the directive works correctly in JetBrains IDE, but the CLI commands ignore the directive and still report the error.

Related GitHub links:

• Original Discussion: biomejs/biome#5854
• Bug Report: biomejs/biome#6031

Steps to Reproduce

1. Clone this repository

2. Install dependencies with npm install

3. Examine the src/style.css file - note there are two CSS rules:

   • One without an ignore directive (should be reported)
   • One with an ignore directive (should be ignored)

4. Run the linting command to see the incorrect behavior:

   npm run lint
   

   Note that both errors are reported, even the one with the ignore directive

5. Similarly, you can run the format command:

   npm run format
   

   And observe that the ignore directive is not respected

6. OPTIONAL - Open the project in a JetBrains IDE with the biome plugin installed and configured to see the correct behaviour - only the non-ignored error is highlighted

Expected vs. Actual Behavior

• Expected: Both the IDE and CLI should respect the biome-ignore directive and not report the ignored error
• Actual: The JetBrains IDE correctly respects the ignore directive, but the CLI commands (npm run lint and npm run format) report errors that should be ignored

Environment Information

• Biome version: 2.0.0-beta.4
• IDE: JetBrains IDE
• Operating System: MacOS