How to use the command rustup which (with examples)

The rustup which command is used to display the path to the binary of a given command managed by rustup. It searches the Rust toolchain instead of the standard $PATH. This command is especially useful when working with multiple Rust toolchains.

Use case 1: Display the path to the binary in the default toolchain

Code:

rustup which command

Motivation:

A motivation for using this use case would be to check the path of a specific command in the default Rust toolchain. This can be helpful when you want to verify the location of a specific binary in your Rust toolchain.

Explanation:

• rustup which is the command to invoke the rustup tool.
• command is the placeholder for the actual command you want to locate.

Example output:

/path/to/default/toolchain/bin/command

Use case 2: Display the path to the binary in the specified toolchain

Code:

rustup which --toolchain toolchain command

Motivation:

This use case becomes relevant when you have installed multiple Rust toolchains on your system and want to find the path to a specific command in a particular toolchain. By specifying the desired toolchain, you can determine the location of the binary for that command.

Explanation:

• rustup which is the command to invoke the rustup tool.
• --toolchain toolchain is an optional argument used to specify the desired toolchain. toolchain should be replaced with the actual name of the toolchain.
• command is the placeholder for the actual command you want to locate.

Example output:

/path/to/specified/toolchain/bin/command

Conclusion:

The rustup which command is a useful tool for locating the path to a command managed by rustup in either the default toolchain or a specified toolchain. It provides a convenient way to verify the location of a specific binary, which can be helpful when working with multiple Rust toolchains.