renv::dependencies() ignores files in .gitignore

[gadenbuie]

This is more of a notice than an issue, but renv::dependencies() filters out files in the .gitignore during dependency discovery.

This means that shinylive::export() will fail to discover and download wasm dependencies at export time if export() is called on an app that is in a git-ignored folder. (Ask me how I know and how long it took me to figure out 😆 )