Cannot pass files together with input directory

[noraj]

Context

Command (incorrect):

$ marp slides.md --theme-set themes --output index.html --input-dir docs

Error message:

[ ERROR ] Cannot pass files together with input directory.
[  WARN ] Not found processable Markdown file(s).
          
Usage:
marp [options] <files...>
marp [options] -I <dir>

Command (correct):

$ marp --theme-set themes --output index.html --input-dir docs

Tree:

.
├── docs
│   ├── assets
│   ├── slides.md
│   └── themes
└── README.md

Issue

I should be able to provide both an input directory docs/ and a file slides.md. Hopefully without the file specific marp-cli still manage the autodetect the source file in docs/ but what if the file had been named SLIDES (without extension) or slides.mkd (less common markdown extension)?

Idea

Outside requiring an argparse logic change there is no reason to not support using both a file and input dir at the same time.

[yhatt]

Marp CLI can handle multiple inputs by using directory and glob pattern. Try this:

marp slides.md docs/*.md --theme-set themes

or simply this:

marp slides.md docs --theme-set themes

By passing directories as input, Marp CLI will find Markdown files (*.md, *.mdown, *.markdown, *.markdn) from specified directories.