From 00987215b7572def2f5cd73a623efc38f4f30ab7 Mon Sep 17 00:00:00 2001
From: Yihui Xie <xie@yihui.name>
Date: Thu, 5 Nov 2020 08:15:54 -0600
Subject: [PATCH] use the exported xfun::is_rel_path()

---
 DESCRIPTION | 2 +-
 R/html.R    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/DESCRIPTION b/DESCRIPTION
index e0ad052e9..cfc976b4d 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: bookdown
 Type: Package
 Title: Authoring Books and Technical Documents with R Markdown
-Version: 0.21.3
+Version: 0.21.4
 Authors@R: c(
     person("Yihui", "Xie", role = c("aut", "cre"), email = "xie@yihui.name", comment = c(ORCID = "0000-0003-0645-5666")),
     person("JJ", "Allaire", role = "ctb"),
diff --git a/R/html.R b/R/html.R
index 9032ad826..5874c9da5 100644
--- a/R/html.R
+++ b/R/html.R
@@ -1032,7 +1032,7 @@ move_files_html = function(output, lib_dir) {
   f = gsub('[?#].+$', '', f)  # strip the #/? part in links, e.g. a.html#foo
   f = gsub('^[.]/', '', f)  # strip the initial ./, e.g. ./foo.png -> foo.png
   f = f[f != '']
-  f = f[!knitr:::is_abs_path(f)]
+  f = f[xfun::is_rel_path(f)]
   if (getOption('bookdown.js.debug', FALSE)) f = c(f, js_min_sources(f))
   # add leaflet images if any used
   f = c(f, grep('png$', list.files(