$ cargo new hello_world Cargo defaults to --bin to make a binary program. To make a library, we would pass --lib, instead. Let’s check out what Cargo has generated for us: $ cd hello_world $ tree . . ├── Cargo.toml └── src └── main.rs 1 directory, 2 files This is all we need to get started. First, let’s check out Cargo.toml:
cargo-metadata(1) NAME. cargo-metadata — Machine-readable metadata about the current package. SYNOPSIS. cargo metadata [options]. DESCRIPTION. Output JSON to stdout containing information about the workspace members and resolved dependencies of the current package.
You should update rustccargorustup update
rustccargo
I have the same versions of rustccargo
If you really want to, you can download a nightly version of Cargo or compile your own. As long as your version exists in your PATH
I used to do this with my local Rust builds in order to have a version of Cargo at all, although rustup now automatically uses the cargo
I've done this by creating a temporary cargo project and adding a small dependency to it. Something like this:
mkdir /tmp/deleteme \
&& cd /tmp/deleteme \
&& cargo init \
&& cargo add serde \
&& rm -rf /tmp/deleteme
You should immediately see the message:
Updating crates.io index
Whenever a dependency from a git repository is specified without any other specifiers (namely via the properties revtagbranchcargo update
cargo update
This will also detect any changes to the version or origin requirements and update the dependency lock accordingly.
I tried to use this command:
cargo install rust_wheel --force
That is the wrong Cargo command. cargo install
Also tried
.cargo update rust_wheel
Wrong syntax. To issue an update of a specific dependency, use the -p
cargo update -p rust_wheel
See also:
From the guide, rustuprustup updaterustup self update