close #2231: output formats sweave and listings should be treated…

… as LaTeX output
yihui · Mar 8, 2023 · 2df02ce · 2df02ce
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diff --git a/DESCRIPTION b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: knitr
 Type: Package
 Title: A General-Purpose Package for Dynamic Report Generation in R
-Version: 1.42.3
+Version: 1.42.4
 Authors@R: c(
     person("Yihui", "Xie", role = c("aut", "cre"), email = "xie@yihui.name", comment = c(ORCID = "0000-0003-0645-5666")),
     person("Abhraneel", "Sarma", role = "ctb"),

diff --git a/NEWS.md b/NEWS.md
@@ -4,6 +4,8 @@
 
 - The chunk option `collapse = TRUE` works with HTML widgets now (thanks, @dmurdoch, #2212).
 
+- For `.Rnw` documents, `is_latex_output()` returns `TRUE` for output formats `sweave` (`render_sweave()`) and `listings` (`render_listings()`) now (thanks, @DavisVaughan, #2231).
+
 ## MINOR CHANGES
 
 - The `css` and `js` engines work for the `markdown` output format now. Previous these engines will not output anything when the output format is `markdown`. If you still want to disable them for `markdown` output, you may use the chunk option `eval = FALSE` or `eval = knitr::is_html_output(excludes = 'markdown')`.

diff --git a/R/utils.R b/R/utils.R
@@ -371,7 +371,7 @@ fix_options = function(options) {
 #' # Test if current output format is 'docx'
 #' knitr::pandoc_to('docx')
 is_latex_output = function() {
-  out_format('latex') || pandoc_to(c('latex', 'beamer'))
+  out_format(c('latex', 'sweave', 'listings')) || pandoc_to(c('latex', 'beamer'))
 }
 
 #' @param fmt A character vector of output formats to be checked against. If not