parallel-lint

Lint a specific directory

$ parallel-lint [path/to/directory]

$ parallel-lint -j [processes] [path/to/directory]

$ parallel-lint --exclude [path/to/excluded_directory] [path/to/directory]

$ parallel-lint -e [php,html,phpt] [path/to/directory]

$ parallel-lint --json [path/to/directory]

$ parallel-lint --blame [path/to/directory]

parallel-lint [options]

-j
    Specify the number of parallel jobs to run. Defaults to the number of CPU cores.

--exclude
    Exclude files or directories matching the specified pattern. Can be specified multiple times.

--verbose
    Increase verbosity of output.

--quiet
    Suppress output.

--help
    Show help message and exit.

--version
    Show version number and exit.

parallel-lint is a command-line tool designed to execute linters in parallel, significantly speeding up the code analysis process. It's particularly useful for large codebases where running linters sequentially would be time-consuming. It automatically detects the files that need to be linted based on configuration files and then distributes the linting tasks across multiple CPU cores. The tool aims to improve developer productivity by providing faster feedback on code quality. It can often integrate with various linters, such as ESLint, PyLint, and others. The core principle is to provide a generic framework that can be adapted to run any linter with minimal configuration, leveraging parallelism to achieve substantial performance gains. Proper configuration is key to maximizing its effectiveness, including setting the correct number of parallel jobs and ensuring the linters are correctly configured to produce machine-readable output.

The effectiveness of parallel-lint depends on the nature of the linter being used and the I/O performance of the system. Overly aggressive parallelism can lead to performance degradation if the system is I/O bound. The linters themselves need to be properly configured to support parallel execution and produce output that can be parsed correctly by parallel-lint.

parallel-lint often relies on configuration files to determine which files to lint and how to run the underlying linters. These configuration files may be specific to the linters themselves (e.g., .eslintrc.js for ESLint) or a dedicated configuration file for parallel-lint. Understanding and properly configuring these files is crucial for effective usage.

parallel-lint typically aggregates and reports errors from the underlying linters. Pay attention to the output format to understand which linter produced each error and where the error occurred in the code. The error messages are usually presented in a user-friendly format that allows developers to quickly identify and fix issues.

parallel-lint emerged as a response to the increasing size of software projects and the need for faster feedback on code quality. Traditional sequential linting processes became a bottleneck in development workflows. It was designed to address this by distributing the linting workload across multiple CPU cores, significantly reducing the overall linting time. The tool has evolved to support various linters and provide more flexible configuration options.

eslint(1), pylint(1)