Introduction to Rust Package Manager Cargo Supporting tagline

Cargo.lock 会记录所有依赖 repo 的版本号，例如：

[[package]]
name = "render"
version = "0.1.0"
source = "git+http://github.com/gfx-rs/gfx-rs#e8563cda1ed1167b4d1a8581000961fac2a38320"
dependencies = [
 	"device 0.1.0 (git+http://github.com/gfx-rs/gfx-rs)",
 	"log 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
]

你可以通过 cargo update 命令来更新依赖 repo 的版本。

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