Rust CLI Dependencies, Features, and Workspaces

[dependencies]
serde = "1.0"

# Use a semantic version requirement.

[dependencies]
mycrate = { git = "https://github.com/org/mycrate.git", branch = "main" }

# Pin a crate directly from a Git repository.

[dependencies]
common = { path = "../common" }

# Depend on a nearby crate in a monorepo.

[dev-dependencies]
assert_cmd = "2"
predicates = "3"

# Keep test-only crates out of the normal build graph.

[build-dependencies]
cc = "1"

# Use crates inside `build.rs` build scripts.

[features]
default = ["color"]
color = []
json = ["dep:serde_json"]

# Declare named features in the manifest.

cargo build --features json,color

# Enable one or more package features.

cargo test --no-default-features

# Build or test without defaults.

cargo check --all-features

# Build everything gated by features.

[workspace]
members = ["crates/*", "xtask"]
resolver = "2"

# Define workspace members from a root manifest.

cargo build --workspace

# Compile all packages in the workspace.

cargo test --workspace

# Run tests across all workspace packages.

cargo check -p xtask

# Target a specific member crate.

cargo test --workspace --exclude xtask

# Skip a workspace member during a broad command.

use clap::Parser;

#[derive(Parser, Debug)]
struct Args {
  #[arg(long)]
  verbose: bool,

  #[arg(long, default_value = ".")]
  path: String,
}

# Derive a parser struct for a CLI.

fn main() -> anyhow::Result<()> {
  println!("hello");
  Ok(())
}

# Use anyhow for ergonomic CLI errors.

RUST_LOG=info cargo run

# Enable application logging with `RUST_LOG`.