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Fix libpaths #298

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Fix libpaths #298

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942027d
Fix passing libPaths on Windows
shikokuchuo May 19, 2026
a93e744
Merge remote-tracking branch 'upstream/main' into fix-libpaths
cderv May 21, 2026
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16 changes: 12 additions & 4 deletions R/quarto.R
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Original file line number Diff line number Diff line change
Expand Up @@ -147,10 +147,18 @@ quarto_run <- function(
# (e.g. to install dev package in a temporary library)
opt_in_libpath <- getOption("quarto.use_libpaths", TRUE)
if (isTRUE(opt_in_libpath) && !is.null(libpaths)) {
custom_env <- c(
custom_env,
R_LIBS = paste(libpaths, collapse = .Platform$path.sep)
)
libs_val <- paste(libpaths, collapse = .Platform$path.sep)
custom_env <- c(custom_env, R_LIBS = libs_val)

# On Windows, also point R_ENVIRON_USER at a temp Renviron that re-sets
# R_LIBS. The user Renviron is processed after the site Renviron, so this
# wins over any system-level reset of R_LIBS during R startup.
# https://github.com/quarto-dev/quarto-r/issues/217
if (.Platform$OS.type == "windows") {
environ_file <- tempfile("quarto_renviron_", fileext = "")
writeLines(sprintf("R_LIBS=%s", libs_val), environ_file)
custom_env <- c(custom_env, R_ENVIRON_USER = environ_file)
}
}

# This is required because `"current"` only is not supported by processx
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3 changes: 0 additions & 3 deletions tests/testthat/test-quarto.R
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Expand Up @@ -161,9 +161,6 @@ test_that("quarto_available()", {
test_that("quarto sees same libpaths as main process", {
skip_if_no_quarto()
skip_on_cran()
# Issue on windows with libpaths
# https://github.com/quarto-dev/quarto-r/issues/217
skip_on_os("windows")
qmd <- local_qmd_file(c("```{r}", "#| echo: false", ".libPaths()", "```"))
tmp_lib <- withr::local_tempdir("tmp_libpath")
withr::local_libpaths(tmp_lib, action = "prefix")
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