R(v3.5.3)从GitHub安装webr包遇依赖运算符错误，求解决方案

I’ve run into similar dependency parsing headaches with older R versions before, so here are some practical, actionable solutions tailored to your situation:

1. Manually Clone the Repo and Fix the DESCRIPTION File #

The core issue is that your outdated R 3.5.3 doesn’t recognize the modern dependency syntax used in the GitHub repo’s DESCRIPTION file. Here’s how to work around it:

• First, clone the repository to your local machine (install git2r if you don’t have it already):

  install.packages("git2r")
  git2r::clone("https://github.com/cardiomoon/webr.git")
  # Alternatively, use your system's Git command line: git clone https://github.com/cardiomoon/webr.git
  

• Navigate to the cloned folder, open the DESCRIPTION file, and scan for lines in Depends, Imports, or Suggests that use syntax like ggplot2 >= 3.0.0. Rewrite these to the old-R-compatible format: ggplot2 (>= 3.0.0) (wrap the version constraint in parentheses).
• Install the modified local package:

  devtools::install_local("path/to/your/cloned/webr/directory")
  

2. Downgrade devtools to a Version Optimized for Old R #

Even though you’re running the latest devtools, newer versions are built for modern R releases. Try reverting to devtools 1.13.6—this version handled legacy dependency syntax much better:

# Uninstall current devtools first
remove.packages("devtools")
# Install the older, compatible version
library(devtools)
install_version("devtools", version = "1.13.6", repos = "http://cran.us.r-project.org")
# Now attempt installing the GitHub webr package again
devtools::install_github("cardiomoon/webr")

3. Upgrade Your R Version (Most Permanent Fix) #

R 3.5.3 is quite dated (released in 2019), and most modern packages have dropped support for its strict dependency parsing rules. If you can afford to upgrade to R 4.0 or later, this will not only resolve this specific error but also prevent a host of other compatibility issues down the line. Once upgraded, installing the GitHub webr package should work without hitches.

4. Extract Just the PieDonut() Function #

If you only need the PieDonut() function and want to skip full package installation, you can grab the function code directly:

• Go to the webr repo’s R folder and open PieDonut.R.
• Copy the entire function definition into your R console or script.
• Run the code to define the function in your environment—you’ll be able to use it immediately without installing the full package.

内容的提问来源于stack exchange，提问作者LeBasti