Cargo - 管理 rust 依赖包

在这里插入图片描述

文章目录

- 关于 Cargo
- 管理应用
- - 创建应用
  - 编译运行
  - build
  - clean
- 管理依赖
- - 添加依赖
  - update
  - check
  - 计时
- manual

rust 安装可参考：https://blog.csdn.net/lovechris00/article/details/124808034

关于 Cargo

Cargo 官方文档： https://doc.rust-lang.org/cargo/
crates : https://crates.io

Cargo is the Rust package manager.
Cargo downloads your Rust package’s dependencies, compiles your packages, makes distributable packages, and uploads them to crates.io, the Rust community’s package registry.

管理应用

创建应用

cargo new world_hello

目录结构如下

$ tree
.
├── Cargo.toml
└── src└── main.rs1 directory, 2 files

Cargo.toml 为 Rust 的清单文件。其中包含了项目的元数据和依赖库。
src/main.rs 为编写应用代码的地方。

编译运行

cargo run

   Compiling world_hello v0.1.0 (/Users/user/Documents/code/scode1/rust/world_hello)Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.95sRunning `target/debug/world_hello`
Hello, world!

会产生编译文件

$ tree -L 3
.
├── Cargo.lock
├── Cargo.toml
├── src
│   └── main.rs
└── target├── CACHEDIR.TAG└── debug├── build├── deps├── examples├── incremental├── world_hello└── world_hello.d

运行 build/run 命令会创建一个新文件 Cargo.lock，该文件记录了本地所用依赖库的精确版本。

build

使用 run 就会自动build，但有时候我们可以只使用 build

cargo build

会生成 debug 文件夹：world_hello/target/debug
将 debug 文件夹删掉，再次 build 会产生新的 debug 文件夹；
如果原文件没修改，build 后，debug 的内容可能不会更新。

clean

cargo clean

debug 等文件夹会被删掉

$ cargo cleanRemoved 119 files, 11.4MiB total
$ tree
.
├── Cargo.lock
├── Cargo.toml
└── src└── main.rs1 directory, 3 files

管理 依赖

创建项目会自动生成 Cargo.toml 文件
原始内容如下：

[package]
name = "world_hello"
version = "0.1.0"
edition = "2021"[dependencies]

添加依赖

在 Rust 中，我们通常把包称作crates
你可以在 crates 库搜索依赖：https://crates.io/crates/rand

这里以添加 rand 为例，添加在 [dependencies] 下方

...
[dependencies]
rand = "0.3.14"

再次 build

$ cargo buildUpdating crates.io indexDownloaded rand v0.3.23Downloaded rand v0.4.6Downloaded libc v0.2.154Downloaded 3 crates (831.0 KB) in 1.22sCompiling libc v0.2.154Compiling rand v0.4.6Compiling rand v0.3.23Compiling world_hello v0.1.0 (/Users/user/Documents/code/scode1/rust/world_hello)Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.11s

查看文件结构
多出了 rand 相关内容

$ tree
.
├── Cargo.lock
├── Cargo.toml
├── src
│   └── main.rs
└── target├── CACHEDIR.TAG└── debug├── build│   ├── libc-f94129358965b880│   │   ├── invoked.timestamp│   │   ├── out│   │   ├── output│   │   ├── root-output│   │   └── stderr│   └── libc-fc8c71922db79826│       ├── build-script-build│       ├── build_script_build-fc8c71922db79826│       └── build_script_build-fc8c71922db79826.d├── deps│   ├── libc-2cd8d736a65e3bdc.d│   ├── libc-2cd8d736a65e3bdc.libc.844209738d3bf612-cgu.0.rcgu.o│   ├── liblibc-2cd8d736a65e3bdc.rlib│   ├── liblibc-2cd8d736a65e3bdc.rmeta│   ├── librand-51e82a279537c372.rlib│   ├── librand-51e82a279537c372.rmeta│   ├── librand-76148f2644fb6b76.rlib│   ├── librand-76148f2644fb6b76.rmeta│   ├── rand-51e82a279537c372.d│   ├── ...│   ├── rand-76148f2644fb6b76.rand.46a886c6f1f6cb04-cgu.4.rcgu.o│   ├── world_hello-7dfffed2f60728f0│   ├── ...│   └── world_hello-ffc760ff065d95f4.rvrclgiszz772pw.rcgu.o├── examples├── incremental│   ├── world_hello-2gr5fivx8ev9t│   │   ├── s-gvxy0ymbb9-azi538-5zea3fzl7hz9mcsbpmuo9lnu2│   │   │   ├── 2ao7q67wh7pwb6v2.o│   │   │   ├── ...│   │   │   └── work-products.bin│   │   └── s-gvxy0ymbb9-azi538.lock│   └── world_hello-32qpckyi3s6et│       ├── s-gvxxyb5ewl-1g1nr9k-5ewriqusvpjsrgth3731ddhf3│       │   ├── 2jcl4b6uedw0auwo.o│       │   ├── ...│       │   ├── rvrclgiszz772pw.o│       │   └── work-products.bin│       └── s-gvxxyb5ewl-1g1nr9k.lock├── world_hello└── world_hello.d14 directories, 65 files

update

更新所有依赖

cargo update

更新指定库

cargo update -p rand

check

查看对目录进行了哪些更改

修改内容按倒序排序

运行 check 之前，cargo clean 清理目录

$ cargo checkChecking libc v0.2.154Checking rand v0.4.6Checking rand v0.3.23Checking world_hello v0.1.0 (/Users/user/Documents/code/scode1/rust/world_hello)Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.94s

计时

查看编译时间

time cargo build

manual

cargo help

Rust’s package manager

Usage: cargo [+toolchain] [OPTIONS] [COMMAND]
cargo [+toolchain] [OPTIONS] -Zscript <MANIFEST_RS> [ARGS]…

Options:

-V, --version, Print version info and exit
- -list, List installed commands
- -explain <CODE, Provide a detailed explanation of a rustc error message
-v, --verbose... , Use verbose output (-vv very verbose/build.rs output)
-q, --quiet, Do not print cargo log messages
- -color <WHEN, Coloring: auto, always, never
-C <DIRECTORY, Change to DIRECTORY before doing anything
, , (nightly-only)
- -frozen, Require Cargo.lock and cache are up to date
- -locked, Require Cargo.lock is up to date
- -offline, Run without accessing the network
- -config <KEY=VALUE, Override a configuration value
-Z <FLAG>, Unstable (nightly-only) flags to Cargo, see cargo -Z help for details
-h, --help, Print help

Commands:

build, b : Compile the current package
check, c : Analyze the current package and report errors, but don’t build object files
clean: Remove the target directory
doc, d, Build this package’s and its dependencies’ documentation
new, : Create a new cargo package
init: Create a new cargo package in an existing directory
add, : Add dependencies to a manifest file
remove, Remove dependencies from a manifest file
run, r, Run a binary or example of the local package
test, t : Run the tests
bench: Run the benchmarks
update, Update dependencies listed in Cargo.lock
search, Search registry for crates
publish : Package and upload this package to the registry
install : Install a Rust binary
uninstall Uninstall a Rust binary
… : See all commands with --list