Does cargo install have an equivalent update command?

I'd like to update a package that I used cargo install to globally install packages, such as rustfmt or racer. I can't find a way to update an installed package without first deleting it (via cargo uninstall) and then running the install command again. Is there an update command?

Nicolai Fröhlich

As of Cargo 1.36.0, you can now use the following command(s) on a nightly toolchain instead of using the cargo-update crate to update crates to their latest version:

rustup install nightly
cargo +nightly install -Z install-upgrade <crate>

This came from pull request #6798 (Add install-upgrade).

How does it work?

Instead of failing when cargo install detects a package is already installed, it will upgrade if the versions don't match, or do nothing (exit 0) if it is considered "up-to-date".

Forcing an Upgrade / Re-Installation

The following command will always uninstall, download and compile the latest version of the crate - even if there's no newer version available. Under normal circumstances the install-upgrade feature should be preferred as it does save time and bandwidth if there's no new version of the crate.

cargo install --force <crate>

Documentation

Further information can be found in the GitHub issue rust-lang/cargo#6797 and in the official documentation chapter Unstable Features -> install-upgrade.

There is no such command in vanilla cargo (well, there's cargo install but that's for dependencies), but since cargo supports third-party subcommands there is an answer: the cargo-update crate.

Install as usual with cargo install cargo-update, then use cargo install-update -a to update all installed packages, for more usage information and examples see the cargo install-update manpage.

_{Disclaimer: am author}

A solution I've found is to add the --force flag to the install command. For example cargo install --force clippy. This will effectively re-install the latest version.

Nope. You can discuss it in this issue.

The command to update dependencies is cargo update

Source : http://doc.crates.io/guide.html

来源：https://stackoverflow.com/questions/34484361/does-cargo-install-have-an-equivalent-update-command

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