upstream targets in .Rmd not found when `pointblank` package loaded in packages.R

[ropensci]

upstream targets in .Rmd not found when `pointblank` package loaded in packages.R

[wlandau]

This is an instance of rstudio/pointblank#252, not a bug in tarchetypes, so unfortunately I cannot fix it.

lines <- c(
  "---",
  "title: 'Untitled'",
  "output: html_document",
  "---",
  "",
  "```{r a}",
  "tar_load(means)",
  "print(means)",
  "```"
)

report <- tempfile()
tangled <- tempfile()
writeLines(lines, report)

knitr::knit(report, output = tangled, tangle = TRUE, quiet = TRUE)

#> [1] "/var/folders/k3/q1f45fsn4_13jbn0742d4zj40000gn/T//RtmpK9VKUK/file11f8010bac725"

writeLines(readLines(tangled))

#> ## ----a------------------------------------------------------------------------
#> tar_load(means)
#> print(means)

library(pointblank)

knitr::knit(report, output = tangled, tangle = TRUE, quiet = TRUE)

#> [1] "/var/folders/k3/q1f45fsn4_13jbn0742d4zj40000gn/T//RtmpK9VKUK/file11f8010bac725"

writeLines(readLines(tangled))

#> NA
#> ---
#> 
#> NA

^{Created on 2021-06-22 by the reprex package (v2.0.0)}