config

The config package makes it easy to manage environment specific configuration values. For example, you might want to use distinct values for development, testing, and production environments.

Installation

You can install the config package from CRAN by using:

install.packages("config")

Usage

To use config, create a file config.yml with default as well as other arbitrary configurations. For example:

config.yml

default:
  trials: 5
  dataset: "data-sampled.csv"
  
production:
  trials: 30
  dataset: "data.csv"

To read configuration values you call the config::get function, which returns a list containing all of the values for the currently active configuration:

R

config <- config::get()
config$trials
#> [1] 5
config$dataset
#> [1] "data-sampled.csv"

You can also read a single value from the configuration as follows:

R

config::get("trials")
#> [1] 5
config::get("dataset")
#> [1] "data-sampled.csv"

The config::get() function takes an optional config argument which determines which configuration to read values from (the “default” configuration is used if none is specified).

Vignettes

See the package vignettes at https://rstudio.github.io/config/ for more examples and instructions for advanced usage, including:

• Inheritance and R expressions
• Using config on Posit Connect

Do not attach the package using library(config)

We strongly recommend you use config::get() rather than attaching the package using library(config).

In fact, we strongly recommend you never use library(config).

The underlying reason is that the get() and merge() functions in {config} will mask these functions with the same names in base R.