Unable to ergonomically re-load R code in nix

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If you cp that bootstrap.min.css file to the same location you get that same permissions error.

# Succeeds
cp /nix/store/3fxl93ds7a9ad0b4s64dqhbcd2ay85ny-r-shiny-1.9.1/library/shiny/www/shared/selectize//js/selectize.min.js .
# Fails
cp /nix/store/3fxl93ds7a9ad0b4s64dqhbcd2ay85ny-r-shiny-1.9.1/library/shiny/www/shared/selectize//js/selectize.min.js .
cp: cannot create regular file './selectize.min.js': Permission denied

So this is just one of those nix things you have to work around sometimes. I presume this is by design, but I’m not 100% sure the reason. The fix is to set the theme to a location that’s not in the nix store. That file won’t have the same restrictions as what’s being copied from /nix.

library(shiny)
library(bslib)
options(shiny.autoreload = TRUE)
# Copy the compiled css theme to your project folder.
file.copy(precompiled_css_path(theme = bs_theme()), "./bootstrap.min.css")

# Define UI ----
ui <- bslib:::page_fluid(
  theme = "bootstrap.min.css",
  ...
  ...
)

Not the prettiest, but works for development.

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