检测 R 会话是否在启动时在 RStudio 中运行 [英] Detect if an R session is run in RStudio at startup

问题描述

我在终端和 RStudio(在 mac 和 linux 上)都使用 R，想知道是否可以为两者使用不同的 .Rprofile，或者最好使用相同的基础 .Rprofile 但来源不同的环境特定调整脚本.

I use R both in the terminal and in RStudio (on mac and linux) and wonder if it is possible to use different .Rprofiles for the two, or preferably use the same base .Rprofile but source different environment specific tweak scripts.

我认为将以下代码放在我的 .Rprofile 中会起作用，但不幸的是 session_info 在 .First 时未设置> 正在运行.Sys.getenv 也不是.

I thought it would work to place the following code in my .Rprofile, but unfortunately session_info isn't set at the time .First is run. Neither is Sys.getenv.

.First <- function(){
    # [STUFF I ALWAYS WANT TO DO]
    # Load my favourite packages
    # Set CRAN mirror
    # etc. etc.

    # [ENVIRONMENT SPECIFIC TWEAKS]
    if(grepl("RStudio", session_info()$platform$ui)){
        tryCatch(source("~/.R_RStudio"), error=print)
    } else {
        tryCatch(source("~/.R_terminal"), error=print)
    }
}

我还尝试在 .bash_profile 中设置 alias R='R --args terminal' 这确实允许我检测会话是否从 bash 启动，但它搞砸 R CMD ... 和任何使用其他命令行参数的脚本.

I also tried setting alias R='R --args terminal' in .bash_profile which does allow me to detect if the session was started from bash, but it screws up R CMD ... and any script that uses other command line arguments.

我意识到可能无法从 R 会话中检测到它从哪里开始，但也许 RStudio 中有一些我不知道的聪明选项.

I realise it might not be possible to detect from within an R session where it was started from, but perhaps there is some clever option in RStudio I am not aware of.

推荐答案

您可以通过检查 RSTUDIO 环境变量的值来检测 RStudio 是否正在托管 R 会话.例如，

You can detect whether RStudio is hosting the R session by checking for the value of the RSTUDIO environment variable. For example,

if (!is.na(Sys.getenv("RSTUDIO", unset = NA))) {
    # RStudio specific code
}

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