[GitHub] [spark] huaxingao commented on a change in pull request #35516: [SPARK-38210][DOCS] Improve documentation generation README

[GitBox <gi...@apache.org>]

huaxingao commented on a change in pull request #35516:
URL: https://github.com/apache/spark/pull/35516#discussion_r810394074



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File path: docs/README.md
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@@ -66,11 +73,15 @@ $ sudo pip install 'sphinx<3.1.0' mkdocs numpy pydata_sphinx_theme ipython nbsph
 
 ### R API Documentation (Optional)
 
-If you'd like to generate R API documentation, you'll need to [install Pandoc](https://pandoc.org/installing.html)
-and install these libraries:
+If you'd like to generate R API documentation, you'll need to install these packages and libraries:
+
+```sh
+$ sudo apt install libssl-dev libcurl4-openssl-dev pandoc libfontconfig1-dev libharfbuzz-dev \
+          libfribidi-dev libfreetype6-dev libpng-dev libtiff5-dev libjpeg-dev libxml2-dev
+```
 
 ```sh
-$ sudo Rscript -e 'install.packages(c("knitr", "devtools", "testthat", "rmarkdown"), repos="https://cloud.r-project.org/")'
+$ sudo Rscript -e 'install.packages(c("curl", "knitr", "devtools", "testthat", "rmarkdown", "markdown", "e1071"), repos="https://cloud.r-project.org/")'

Review comment:
       I had the same problem:  I tested with and without markdown package and it failed without. 




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