rv

Extremely fast Ruby and gem manager.

Runs as rv, rvw, rvx|macOS, Linux, Windows|github.com

Command form

ai-draft · 2 tasks · 5 fields

Run commands with a managed Ruby and install Ruby versions. clean-install, tool, shell, cache, fmt and self subcommands are not covered.

Opens the form; the finished command lands at your prompt, unrun

Run in Otty

otty gui rv

`rv run`

Run with Ruby

Run a command or script with Ruby available, installing the requested Ruby if needed.

Run with RubyExample values, fixed in this page — nothing here reaches a terminal

Basic

Command*

string

Arguments

string

Ruby version

string

TasksEach one presets the form for one job

Run a command

rubycommandargs

ParametersOnly these flags are editable in the form

Ruby version

For example 3.4 or 4.0.1.
string

--ruby

Command

For example ruby, irb or a script name.
string · positional 0

Arguments

string · positional 1 · repeatable

`rv ruby install`

Install Ruby

Install a Ruby version. With no version, it is discovered from .ruby-version, .tool-versions or Gemfile.lock.

Install RubyExample values, fixed in this page — nothing here reaches a terminal

Basic

Ruby version

string

TasksEach one presets the form for one job

Install a version

version

ParametersOnly these flags are editable in the form

Ruby version

For example latest, 3.4, 4.0.1 or dev.
string · positional 0

latest3.44.0.1

Overwrite existing

boolean

--force

SourcesEvery flag above is checked against these

src

/// Ruby version to use. pub ruby: Option<RubyRequest>, rv run --ruby 3.4.2 -- ruby /// What to run with Ruby available, e.g. `ruby myscript.rb` #[arg(trailing_var_arg = true, allow_hyphen_values = true, required = true, value_names = ["COMMAND", "ARGS"])]

help2026-10-27

github.com

src

rv ruby install rv ruby install latest rv ruby install 3.4 rv ruby install 4.0.1 /// Directory to install into #[arg(short, long, value_name = "DIR")] install_dir: Option<String>, /// Ruby version to install version: Option<RubyRequest>, /// Overwrite an existing installed version. Version already installed. If you want to overwrite it, use '--force'.

help2026-10-27

github.com

Before it fills your prompt, Otty checks the installed rv against its version. A form that does not match your version is not offered.