callr: rcmd_copycat – R documentation

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callr

rcmd_copycat

Call and R CMD command, while mimicking the current R session

Description

This function is similar to rcmd(), but it has slightly different defaults:

The repos options is unchanged.
No extra environment variables are defined.

Usage

rcmd_copycat(
  cmd,
  cmdargs = character(),
  libpath = .libPaths(),
  repos = getOption("repos"),
  env = character(),
  ...
)

Arguments

`cmd`	Command to run. See `R --help` from the command line for the various commands. In the current version of R (3.2.4) these are: `BATCH`, `COMPILE`, `SHLIB`, `INSTALL`, `REMOVE`, `build`, `check`, `LINK`, `Rprof`, `Rdconv`, `Rd2pdf`, `Rd2txt`, `Stangle`, `Sweave`, `Rdiff`, `config`, `javareconf`, `rtags`.
`cmdargs`	Command line arguments.
`libpath`	The library path.
`repos`	The `repos` option. If `NULL`, then no `repos` option is set. This options is only used if `user_profile` or `system_profile` is set `FALSE`, as it is set using the system or the user profile.
`env`	Environment variables to set for the child process.
`...`	Additional arguments are passed to `rcmd()`.

Security considerations

callr makes a copy of the user's .Renviron file and potentially of the local or user .Rprofile, in the session temporary directory. Avoid storing sensitive information such as passwords, in your environment file or your profile, otherwise this information will get scattered in various files, at least temporarily, until the subprocess finishes. You can use the keyring package to avoid passwords in plain files.