This adds a package for `irep`, a tool for reading `lua` input decks from
Fortran, C, and C++.
`irep` can be built with either `lua` or `luajit`. To address this, we also add
a virtual package for lua called `lua-lang`. `luajit` isn't, by default, a drop-in
replacement for `lua`, but we add a `+lualinks` variant to it that adds symlinks
that make it behave like `lua@5.1`. With this variant enabled, it provides the
`lua-lang` virtual. `lua` always provides `lua-lang`.
- [x] add `irep` package
- [x] add `+lualinks` variant to `lua-luajit`
- [x] create `lua-lang` virtual, provided by `lua` and `luajit+lualinks`
Co-authored-by: Kayla Richarda Butler <butler59@quartz1148.llnl.gov>
Co-authored-by: Todd Gamblin <tgamblin@llnl.gov>
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