Cargo

Use Cargo for managing projects.

cargo new test_project // create project with binary file src/main.rs
// OR
cargo new test_project --lib // create project with library file src/lib.rs 

cd test_project

Source code is in src folder.

cargo build # build project for debug, do not run
cargo run # build & run project
cargo check # fast compiling
cargo build --release # slow build with optimizations for speed of release version

Documentation of methods & traits used in code can be compiled an opened in browser with Cargo command:

cargo doc --open

Cargo Examples

Create “examples” folder beside the “src” folder. Create a file named, for example, “variables.rs” and place some test code in the folder. Then in the project root folder run:

cargo run --example variables

Cargo Watch

This will compile+build the code in examples folder, file “variables.rs”. Very convenient to try test different stuff. For live development do:

cargo watch -q -c -x 'run -q --example variables'

-x - rerun upon code change -c - clear terminal each time -q - quiet mode

Panic Response

В ответ на панику, по умолчанию программа разматывает стек (unwinding) - проходит по стеку и вычищает данные всех функций. Для уменьшения размера можно просто отключать программу без очистки - abort. Для этого в файле Cargo.toml надо добавить в разделы [profile]:

[profile.release]
panic = 'abort'

Cargo Clippy linter

Example of Clippy config:

cargo clippy --fix -- \
-W clippy::pedantic \
-W clippy::nursery \
-W clippy::unwrap_used \
-W clippy::expect_used

Clippy has a markdown book:

cargo install mdbook
# Run from top level of your rust-clippy directory:
mdbook serve book --open
# Goto http://localhost:3000 to see the book

Important Cargo libs

• Tokio - async runtime
• Eyre & color-eyre - type signatures, error report handling
• Tracing - collect diagnostic info
• Reqwest - HTTP requests library, async
• Rayon - data parallelism library, without data races
• Clap - commandline passing library
• SQLX - compile-checked SQL, async
• Chrono - time/date library
• EGUI - web-gui @60FPS, runs in Webassembly
• Yew.rs - web-library like React.js