In lorenzwalthert/fallback: Default values for function calls from yaml config files

knitr::opts_chunk$set(echo = TRUE)

We have the following options to store configurations:

• Using environment variables: This is dangerous (no namespacing), inflexible (global settings), just strings, very inflexible data structure.

• Using R options: kind of hidden, one setting for each R session, very flexible data structure, R native. Cannot be used for other programming langauges.

• config file: transparent, portable, somehow flexible data structure. Using working directory as reference, allows for heuristics like various profile files. Language agnostic.

We believe a config file is best suited. Use something like reprex:::opts() as default arguements of style_dir()

style_dir(
  path = fallback("."),
  ...,
  style = fallback("tidyverse_style"),
  transformers = style(...),
  filetype = fallback("R"),
  recursive = fallback(TRUE),
  exclude_files = fallback(NULL),
  include_roxygen_examples = fallback(TRUE)
)

There are different options as per how this could be implemented on the config file part.

• storing all configurations in one file fallback.yaml and use sub-headers for the different packages. Advantage: All configurations in one place.

• create a separate file for each package, e.g. styler.yaml to store styler configurations. Drawback: Directory convolution. Solution: use folder fallback.

lorenzwalthert/fallback documentation built on April 19, 2022, 1:51 p.m.