Bug in LaTeX devcontainer template: `latexEngine` option for `xetex` produces invalid `latexmk` argument

[julian-poidevin]

Hello,

I found a bug in the LaTeX devcontainer template at templates/src/latex/.devcontainer.json.

The latex-workshop.latex.tools section uses:

"-${templateOption:latexEngine}"

However, the option value for the xetex engine is -xelatex, not xetex. As a result, the generated LaTeX Workshop config passes -xetex to latexmk, which fails with:

Latexmk: -xetex unknown option
Rc files read:
  NONE

Latexmk: Bad options specified
Use
   latexmk -help
to get usage information

Expected behavior:

The xetex engine should map to the correct latexmk argument -xelatex, or the template should use a matching value for the latexEngine option.

Steps to reproduce:

1. Use the LaTeX devcontainer template.
2. Select the xetex engine option.
3. Build the project with LaTeX Workshop.
4. The build fails with the error above.

Thanks!