How can I use remark-cli with a compiler that outputs binary?

[inokawa]

Hi, I'd like to support remark-cli with my compiler plugin remark-docx, which converts mdast to .docx binary, since there seems to be certain needs for cli (e.g. markdown-docx, md2report).

My question is, what is the best way to create cli with compiler that outputs ArrayBuffer or TypedArray? What I tried:

1. I found that VFile supports Uint8Array. However remark-cli didn't work as expected with Uint8Array because it was stringified just before writing to file system.
   https://github.com/unifiedjs/unified-engine/blob/6f35eaedc659e6edd5392f9ef0cf49bc51f3feab/lib/file-pipeline/file-system.js#L58
   https://github.com/vfile/vfile/blob/5e83917c832881569c52f1118c7beea3f12ac12f/lib/index.js#L574

2. I found that unified-engine has alwaysStringify option which allows us accessing VFiles directly. However I don't want to make cli from scratch for maintenance reason, if possible.

[wooorm]

Hi! Could you try a PR swapping .toString() -> .value? (https://github.com/unifiedjs/unified-engine/blob/6f35eaedc659e6edd5392f9ef0cf49bc51f3feab/lib/file-pipeline/file-system.js#L58)

[inokawa]

Thank you! I create a PR following the suggestion unifiedjs/unified-engine#86.