Bug in glue_sys_reqs()

[csgillespie]

I think the following is incorrect,

vetiver:::glue_sys_reqs("shiny")
#RUN apt-get update -qq && apt-get install -y --no-install-recommends \
 # make

as shiny should depend on zlibg as well.

I think the error is this line:

vetiver-r/R/write-docker.R

Line 116 in 8edec56

sys_reqs <- sort(unique(map_chr(sys_reqs, 1L)))

Happy to submit a PR.

[juliasilge]

Yeah, I think you're right that something has gone wrong there. The line before looks OK (this is for shiny):

> map(sys_reqs$requirements, pluck, "requirements", "packages")
[[1]]
[[1]][[1]]
[1] "make"


[[2]]
[[2]][[1]]
[1] "make"


[[3]]
[[3]][[1]]
[1] "make"

[[3]][[2]]
[1] "zlib1g-dev"

A PR would be fantastic, if you are able! Could you add a test for this function that is skipped on CRAN, for a few real packages?