How can I determine a file extension given a file path in LaTeX?

Question

I am attempting to write a LaTeX package which leverages the minted package's \inputminted command. My \mycommand command takes two parameters, the first being a path to a file, and I want to pass the file's extension to the \inputminted command:

\newcommand\mycommand[2]{
  \inputminted{#1}{...}
}

Note that the above won't work since the full path is passed to \inputminted.

Example:

\mycommand{/path/to/Test.java}{blah}

should invoke

\inputminted{java}{...}

Answer 1

In your package use the function \filename@parse

\filename@parse{/path/to/Test.java}

then you can access the results using

\filename@base
\filename@ext

So in your case

\inputminted{\filename@ext}{...}