如何在devtools::check()中正确指定env_vars参数？

It looks like the issue here is how you're passing the environment variable to devtools::check(). The env_vars parameter expects a named list or named vector of key-value pairs, not a single string with an = sign.

Your current code treats the entire string _R_S3_METHOD_LOOKUP_BASEENV_AFTER_GLOBALENV_= TRUE as an unnamed environment variable, which is why the output shows that odd formatting with an extra colon before the variable string.

Correct Ways to Set the Environment Variable #

You have two straightforward fixes here:

1. Use a Named List

This is the most intuitive approach, especially for logical values:

devtools::check(
  document = FALSE,
  env_vars = list(
    _R_S3_METHOD_LOOKUP_BASEENV_AFTER_GLOBALENV_ = TRUE
  )
)

2. Use a Named Vector

If you prefer using a vector, make sure the value is a string (since environment variables are stored as strings under the hood):

devtools::check(
  document = FALSE,
  env_vars = c(
    "_R_S3_METHOD_LOOKUP_BASEENV_AFTER_GLOBALENV_" = "TRUE"
  )
)

Expected Output After Fix #

Once you use either of these formats, the Setting env vars section of the output will match your desired result:

Setting env vars -------------------------------------------- 
_R_CHECK_CRAN_INCOMING_ : FALSE 
_R_CHECK_FORCE_SUGGESTS_ : FALSE 
_R_S3_METHOD_LOOKUP_BASEENV_AFTER_GLOBALENV_ : TRUE

内容的提问来源于stack exchange，提问作者swihart