Hugo no longer supports yes/no as Boolean in YAML

Author: yihui

DESCRIPTION

@@ -1,7 +1,7 @@
 Type: Package
 Package: blogdown
 Title: Create Blogs and Websites with R Markdown
-Version: 1.21.1
+Version: 1.21.2
 Authors@R: c(
     person("Yihui", "Xie", role = c("aut", "cre"), email = "xie@yihui.name", comment = c(ORCID = "0000-0003-0645-5666")),
     person("Christophe", "Dervieux", role = "aut", email = "cderv@posit.co", comment = c(ORCID = "0000-0003-4474-2498")),

NEWS.md

@@ -2,6 +2,8 @@
 
 - Due to the complexity, HugoBlox themes are no longer tested against blogdown, hence are not guaranteed to work with blogdown any more.
 
+- When converting metadata to YAML (e.g., in `new_site(to_yaml = TRUE)`), logical values are converted to `true`/`false` instead of `yes`/`no` now. This is because [Hugo v0.152.0](https://github.com/gohugoio/hugo/releases/tag/v0.152.0) no longer supports `yes`/`no` as logical values.
+
 # CHANGES IN blogdown VERSION 1.21
 
 - Use the `--renderToMemory` flag by default for Hugo >= 0.123.0 when starting `hugo server` (thanks, @drmowinckels, #772). If you do not wish to use this flag by default, please see https://bookdown.org/yihui/blogdown/livereload.html on how to configure your own default flags for `hugo server`.

R/utils.R

@@ -830,7 +830,9 @@ yaml_load_file = function(...) yaml::yaml.load_file(...)
 
 # a wrapper of yaml::as.yaml() to indent sublists by default and trim white spaces
 as.yaml = function(..., .trim_ws = TRUE) {
-  res = yaml::as.yaml(..., indent.mapping.sequence = TRUE)
+  res = yaml::as.yaml(..., indent.mapping.sequence = TRUE, handlers = list(
+    logical = yaml::verbatim_logical
+  ))
   Encoding(res) = 'UTF-8'
   if (.trim_ws) sub('\\s+$', '', res) else res
 }