switch from webshot to webshot2

Author: yihui

.github/workflows/build-book.yaml

@@ -39,12 +39,7 @@ jobs:
 
       - name: Install missing system dependencies
         if: runner.os == 'Linux'
-        run: sudo apt-get install -y libgtk2.0-dev asymptote
-
-      - name: Install phantomjs
-        run: |
-          webshot::install_phantomjs()
-        shell: Rscript {0}
+        run: sudo apt-get install -y libgtk2.0-dev asymptote chromium-browser
 
       - name: Build Gitbook
         if: github.event_name == 'pull_request'

09-multiformat.Rmd

@@ -64,18 +64,17 @@ Note however that the HTML output will not be visible in
 non-HTML formats.
 ```
 
-There is actually a better solution than the one mentioned in the above error message, but it involves extra packages. You can install the **webshot** package [@R-webshot]\index{R package!webshot} in R and also install PhantomJS\index{PhantomJS}:
+There is actually a better solution than the one mentioned in the above error message, but it involves extra packages. You can install the **webshot2** package [@R-webshot2]\index{R package!webshot2} in R and also install Google Chrome or any other Chromium-based browser if you do not have such a browser installed:
 
 ```{r, eval=FALSE}
-install.packages('webshot')
-webshot::install_phantomjs()
+install.packages('webshot2')
 ```
 
 Then if you knit an Rmd document with HTML widgets to a non-HTML format, the HTML widgets will be displayed as static screenshots. The screenshots are automatically taken in **knitr**. [Section 2.10](https://bookdown.org/yihui/bookdown/html-widgets.html) of the **bookdown** book contains more information on finer control over the screenshots.
 
 ## Embed a web page {#include-url}
 
-If you have the **webshot** package [@R-webshot]\index{R package!webshot} and PhantomJS\index{PhantomJS} installed (see Section \@ref(html-widgets)), you can embed any web page in the output document through `knitr::include_url()`\index{knitr!include\_url()}. When you pass a URL of a web page to this function in a code chunk, it will generate an `<iframe>` (inline frame)\index{HTML!iframe} if the output format is HTML, and a screenshot of the web page for other output formats. You can view the actual page in the inline frame. For example, Figure \@ref(fig:include-url) should show you my homepage if you are reading the online version of this book, otherwise you will see a static screenshot instead.
+If you have the **webshot2** package [@R-webshot2]\index{R package!webshot} and Chrome installed (see Section \@ref(html-widgets)), you can embed any web page in the output document through `knitr::include_url()`\index{knitr!include\_url()}. When you pass a URL of a web page to this function in a code chunk, it will generate an `<iframe>` (inline frame)\index{HTML!iframe} if the output format is HTML, and a screenshot of the web page for other output formats. You can view the actual page in the inline frame. For example, Figure \@ref(fig:include-url) should show you my homepage if you are reading the online version of this book, otherwise you will see a static screenshot instead.
 
 \let\ooldhref\href
 \let\href\oldhref

18-references.Rmd

@@ -78,7 +78,7 @@ pkgs <- c(
   'trackdown',
   'tufte',
   'usethis',
-  'webshot',
+  'webshot2',
   'workflowr',
   'xaringan',
   'xfun',

DESCRIPTION

@@ -73,7 +73,7 @@ Imports:
     trackdown,
     tufte,
     usethis,
-    webshot,
+    webshot2,
     workflowr,
     xaringan,
     xfun,

SETUP.md

@@ -54,7 +54,7 @@ Other required LaTeX packages should be installed automatically during the build
 
 For Windows users, the section of the book on the [Asymptote language engine](https://bookdown.org/yihui/rmarkdown-cookbook/eng-asy.html) does not build properly so it will be skipped. For users with other operating systems, this section will be skipped if Asymptote is not installed on your computer. If they wish to build this section, they must download and install the [Asymptote software](https://asymptote.sourceforge.io/) from its website. After you install it, you may confirm that it is on your system's path by running the terminal command `where asy` or `Sys.which("asy")` from within R.
 
-Phantom JS is also required for use with the **webshot** package. This is automatically installed on the first run of `index.Rmd`, but if you wish you may pre-install it with the command `webshot::install_phantomjs()`.
+Chrome is also required for use with the **webshot2** package.
 
 ## Building the Book
 

index.Rmd

@@ -23,7 +23,7 @@ cover-image: images/cover.png
 ```{r setup, include=FALSE}
 set.seed(0728)
 
-knitr::opts_chunk$set(tidy = TRUE, webshot = "webshot")
+knitr::opts_chunk$set(tidy = TRUE, webshot = "webshot2")
 
 if (knitr::is_html_output()) {
   # ignore percentage widths for HTML output, unless they are used for multiple
@@ -35,9 +35,6 @@ if (knitr::is_html_output()) {
   })
 }
 
-# screenshot HTML widgets
-if (is.null(webshot:::find_phantom())) webshot::install_phantomjs()
-
 options(bookdown.post.latex = function(x) {
   # substitute nonbreaking spaces in \texttt{} with normal spaces
   m = gregexpr('\\\\texttt\\{[^}]+}', x)