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The cli package is used for progress reporting by several packages, notably tidyverse packages. For instance, in purrr, you can do:
y <- purrr::map(1:100, \(x) Sys.sleep(0.1), .progress = TRUE)
to report on progress via the cli package as map() is iterating
over the elements. Now, instead of using the default, built-in
cli progress bar, we can customize cli to report on progress
via progressr instead. To do this, set R option
cli.progress_handlers as:
options(cli.progress_handlers = "progressr")
With this option set, cli will now report on progress according to
your progressr::handlers() settings. For example, with:
progressr::handlers(c("beepr", "rstudio"))
will report on progress using beepr and the RStudio Console progress panel.
To make cli report via progressr in all your R session, set
the above R option in your ~/.Rprofile startup file, e.g.
if (requireNamespace("progressr", quietly = TRUE)) {
options(cli.progress_handlers = "progressr")
}
Note: A cli progress bar can have a "name", which can be
specfied in purrr function via argument .progress,
e.g. .progress = "processing". This name is then displayed in front
of the progress bar. However, because the progressr framework
does not have a concept of progress "name", they are silently ignored
when using options(cli.progress_handlers = "progressr").
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They may not be fully stable and should be used with caution. We make no claims about them.
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