Get Normalized Configuration Directory Path of a Program

config_dir returns the absolute, normalized path to the configuration directory of a program/package/app based on an optional app-specific commandline argument, an optional app-specific environment variable and the XDG Base Directory Specification

Usage

config_dir(
  app_name,
  cl_arg = commandArgs()[grep("--config-dir", commandArgs()) + 1],
  env_var = Sys.getenv(toupper(paste0(app_name, "_config_dir()"))),
  create = FALSE,
  sep = "/"
)

Arguments

app_name

Name of the program/package/app

cl_arg

Value of app specific commandline parameter

env_var

Value of app specific environment variable

create

whether to create returned path, if it doesn't exists yet

sep

Path separator to be used on Windows

Value

Normalized path to the configuration directory of $app_name.

Details

The following algorithm is used to determine the location of the configuration directory for application $app_name:

1. If parameter cl_arg is a non-empty string, return it

2. Else, if parameter env_var is a non-empty string, return it

3. Else, if environment variable (EV) XDG_CONFIG_HOME exists, return $XDG_CONFIG_HOME/$app_name

4. Else, if EV HOME exists, return $HOME/.config/{app_name}

5. Else, if EV USERPROFILE exists, return $USERPROFILE/.config/{app_name}

6. Else, return $WD/.config/{app-name}

where $WD equals the current working directory and the notation $VAR is used to specify the value of a parameter or environment variable VAR.

See also

data_dir(), config_file(), xdg_config_home()

Examples

config_dir("myApp")
#> [1] "/home/runner/.config/myApp"