markdownlint-cli

Command Line Interface for MarkdownLint

Installation

npm install -g markdownlint-cli

Usage

markdownlint --help

  Usage: markdownlint [options] <files|directories|globs>

  MarkdownLint Command Line Interface

  Options:

    -h, --help                                  output usage information
    -V, --version                               output the version number
    -f, --fix                                   fix basic errors (does not work with STDIN)
    -s, --stdin                                 read from STDIN (does not work with files)
    -o, --output [outputFile]                   write issues to file (no console)
    -c, --config [configFile]                   configuration file (JSON, JSONC, or YAML)
    -i, --ignore [file|directory|glob]          file(s) to ignore/exclude
    -p, --ignore-path [file]                    path to file with ignore pattern(s)
    -r, --rules  [file|directory|glob|package]  custom rule files

Globbing

markdownlint-cli supports advanced globbing patterns like **/*.md (more information). With shells like Bash, it may be necessary to quote globs so they are not interpreted by the shell. For example, --ignore *.md would be expanded by Bash to --ignore a.md b.md ... before invoking markdownlint-cli, causing it to ignore only the first file because --ignore takes a single parameter (though it can be used multiple times). Quoting the glob like --ignore '*.md' passes it through unexpanded and ignores the set of files.

Globbing examples

To lint all Markdown files in a Node.js project (excluding dependencies), the following commands might be used:

Windows CMD: markdownlint **/*.md --ignore node_modules

Linux Bash: markdownlint '**/*.md' --ignore node_modules

Ignoring files

If present in the current folder, a .markdownlintignore file will be used to ignore files and/or directories according to the rules for gitignore. If the -p/--ignore-path option is present, the specified file will be used instead of .markdownlintignore.

The order of operations is:

• Enumerate files/directories/globs passed on the command line
• Apply exclusions from -p/--ignore-path (if specified) or .markdownlintignore (if present)
• Apply exclusions from any -i/--ignore option(s) that are specified

Fixing errors

When the --fix option is specified, markdownlint-cli tries to apply all fixes reported by the active rules and reports any errors that remain. Because this option makes changes to the input files, it is good to make a backup first or work with files under source control so any unwanted changes can be undone.

Because not all rules include fix information when reporting errors, fixes may overlap, and not all errors are fixable, --fix will not usually address all errors.

Configuration

markdownlint-cli reuses the rules from markdownlint package.

Configuration is stored in JSON, JSONC, YAML, or INI files in the same config format.

The example of configuration file:

{
  "default": true,
  "MD003": { "style": "atx_closed" },
  "MD007": { "indent": 4 },
  "no-hard-tabs": false,
  "whitespace": false
}

See test configuration file or style folder for more examples.

CLI argument --config is not mandatory. If it is not provided, markdownlint-cli looks for file .markdownlint.json/.markdownlint.yaml/.markdownlint.yml in current folder, or for file .markdownlintrc in current or all upper folders. The algorithm is described in details on rc package page. If --config argument is provided, the file must be valid JSON, JSONC, or YAML.

Exit codes

markdownlint-cli returns one of the following exit codes:

• 0: Program ran successfully
• 1: Linting errors / bad parameter
• 2: Unable to write -o/--output output file
• 3: Unable to load -r/--rules custom rule

Related

• markdownlint - API for this module
• glob - Pattern matching implementation
• ignore - .markdownlintignore implementation

License

MIT © Igor Shubovych