Check for broken links in markup files. Currently html and markdown files are supported. The Markup Link Checker can easily be integrated in your CI pipeline to prevent broken links in your markup docs.

• Find and check links in markdown and html files
• Support HTML links and plain URLs in markdown files
• Validated absolute and relative file paths and URLs
• User friendly command line interface
• Easy CI pipeline integration
• Very fast execution using async
• Efficient link resolving strategy which tries with minimized network load
• Throttle option to prevent 429 Too Many Requests errors
• Configure via config file
• Report broken links via GitHub workflow commands

There are different ways to install and use mlc.

Use rust's package manager cargo to install mlc from crates.io:

cargo install mlc

To download a compiled binary version of mlc go to github releases and download the binaries compiled for x86_64-unknown-linux-gnu and x86_64-apple-darwin.

You can install from the official repositories using pacman:

pacman -S markuplinkchecker

Use mlc in GitHub using the GitHub-Action from the Marketplace.

- name: Markup Link Checker (mlc)
  uses: becheran/[email protected]

Use mlc command line arguments using the with argument:

- name: Markup Link Checker (mlc)
  uses: becheran/[email protected]
  with:
    args: ./README.md

The action does uses GitHub workflow commands to highlight broken links:

To integrate mlc in your CI pipeline running in a linux x86_64 environment you can add the following commands to download the tool:

curl -L https://github.com/becheran/mlc/releases/download/v0.17.0/mlc-x86_64-linux -o mlc
chmod +x mlc

For example take a look at the ntest repo which uses mlc in the CI pipeline.

Use the mlc docker image from the docker hub which includes mlc.

Once you have mlc installed, it can be called from the command line. The following call will check all links in markup files found in the current folder and all subdirectories:

mlc

Another example is to call mlc on a certain directory or file:

mlc ./docs

Call mlc with the --help flag to display all available cli arguments:

mlc -h

The following arguments are available:

All optional arguments which can be passed via the command line can also be configured via the .mlc.toml config file in the working dir where mlc is started:

# Print debug information to console
debug = true
# Do not warn for links which redirect to the given URL
do-not-warn-for-redirect-to=["http*://crates.io*"]
# Do not check web links
offline = true
# Check the exact file extension when searching for a file
match-file-extension= true
# List of files and directories which will be ignored
ignore-path=["./ignore-me","./src"]
# List of links which will be ignored
ignore-links=["http://ignore-me.de/*","http://*.ignoresub-domain/*"]
# List of markup types which shall be checked
markup-types=["Markdown","Html"]
# Wait time in milliseconds between http request to the same host
throttle= 100
# Path to the root folder used to resolve all relative paths
root-dir="./"

Checkout the changelog file to see the changes between different versions.

This project is licensed under the MIT License - see the LICENSE file for more details.