rv integrates with zsh, bash, fish, and nushell.
Run rv shell <zsh|bash|fish|nu> to get instructions to set up rv integration
with your shell. After this one-time setup, rv will automatically use
.ruby-version or .tool-versions files to give you the requested Ruby.
If necessary, the shell integration will change your PATH, GEM_HOME, and other
env vars as needed to ensure that the ruby command will run the expected
version of ruby.
View or update the version of Ruby used in a project by running rv ruby pin VERSION.