Styling with tergo

library(tergo)

Get Started with `tergo`

tergo is a lightning-fast R code formatter powered by Rust, designed for developers who prioritize speed and efficiency. Whether you’re optimizing CI pipelines or building responsive developer tools, tergo reformats R code in milliseconds.

Installation

Method 1: From R-Universe (Recommended for Most Users)

No Rust tooling required. Binaries are pre-built:

install.packages('tergo', repos = c(
  'https://kpagacz.r-universe.dev',
  'https://cloud.r-project.org'
))

Method 2: From GitHub Sources (For Advanced Users)

Requires Rust toolchain:

if (!require(remotes)) install.packages("remotes")
remotes::install_github("kpagacz/tergo@latest", subdir = "antidotum/tergo")

Basic Usage

Style your entire R package:

tergo::style()  # Run in package root directory

Style specific files/directories:

tergo::style("path/to/your-script.R")
tergo::style(c("dir1/", "dir2/"))

Configuration Options

Customize formatting via tergo.toml in your package root or through function arguments.

Example `tergo.toml`

indent = 4
line_length = 80
embracing_op_no_nl = false
function_line_breaks = "double"

Inline Configuration

Override settings programmatically:

tergo::style(config = list(
  indent = 4,
  allow_nl_after_assignment = TRUE
))

Full Configuration Reference

Option	Type	Default	Description
`indent`	integer	2	Spaces per indent level
`line_length`	integer	120	Maximum line length before wrapping
`embracing_op_no_nl`	boolean	TRUE	Remove line breaks in `{{ }}` (ref)
`allow_nl_after_assignment`	boolean	FALSE	Permit line breaks after `=`, `<-`, `:=`
`space_before_complex_rhs_in_formula`	boolean	TRUE	Add space before complex RHS in formulas (ref)
`strip_suffix_whitespace_in_function_defs`	boolean	TRUE	Trim trailing whitespace in functions
`function_line_breaks`	string	“hanging”	`"single"`/`"double"`/`"hanging"` function argument formatting (ref)
`insert_newline_in_quote_call`	boolean	TRUE	Add newlines in long `quote()` calls

Why Choose `tergo`?

Blazing Fast: Formats large codebases 100-1000x faster than alternatives
CI-Friendly: Reduces CI runtime/costs by orders of magnitude
Low-Config Efficiency: Sensible defaults with focused customization
Native Performance: Rust core ensures consistent speed regardless of input size

Advanced Usage

Benchmarking

Verify performance claims using included benchmarks:

source(system.file("bench.R", package = "tergo"))

Project-Specific Configs

Maintain different .toml files for multiple projects:

tergo::style(config = "path/to/alternate.toml")

Next Steps:
• Run ?tergo::style for detailed function documentation
• Visit GitHub repository for issue tracking
• Experiment with different .toml configurations to match your team’s style guide ```

Get Started with tergo