The goal of styler is to provide non-invasive pretty-printing of R source code while adhering to the tidyverse formatting rules. Support for custom style guides is planned.

You can install the package from CRAN:

install.packages("styler")

Or get the development version from GitHub:

# install.packages("remotes")
remotes::install_github("r-lib/styler")

You can style a simple character vector of code with style_text():

ugly_code <- "a<-function( x){1+1}           "
style_text(ugly_code)
#> a <- function(x) {
#>   1 + 1
#> }

There are a few variants of style_text():

• style_file() styles .R and/or .Rmd files.
• style_dir() styles all .R files in a directory.
• style_pkg() styles the source files of an R package.
• RStudio Addins for styling the active file, styling the current package and styling the highlighted code region.

You can find more information on the wiki of Google Summer of Code 2017 or check out the pkgdown page.