A CLI which extracts and validates links from markdown files in a directory a subdirectory.
md-links <path-to-file> [options]
If we pass the --validate option, the module must make an HTTP request to
find out if the link works or not. If the link results in a redirect to a
URL that responds ok, then we will consider the link as ok.
commonmark-java library is used for parsing the markdown files. This library provides AbstractVisitor Class which is extended in clojure by LinkVisitor
Each markdown file is processed in a thread using a clojure future. Each link is validated in a thread using a clojure future. In both cases, clojure promises are used to provide result when a operation finished.
