我有一个包含二进制文件和库的箱子.该库对依赖性非常轻,而二进制文件需要更多,例如,加载文件或做范围并行的事情.
目前,我的Cargo.toml设置如下：
[dependencies.kdtree]
path = "../kdtree"
[dependencies]
rand="0.3.0"
rustc-serialize = "0.3"
csv = {git = "https://github.com/BurntSushi/rust-csv.git"}
crossbeam = "0.2"
num_cpus = "0.2"
[lib]
name = "conformal"
path = "src/lib.rs"
[[bin]]
name = "ucitest"
path = "src/bin/main.rs"
库需要的唯一依赖是kdtree和rand.但是,即使您只构建库,它似乎仍然构建了仅二进制依赖项.我已经尝试使用[[bin] .dependencies]或[ucitest-dependencies](或在[[bin]]下添加依赖项= []行)等功能和其他技巧,我认为这些技巧可能只是为二进制构建,但我找不到办法.
这些不足以使这成为一个问题,但它困扰着我.有没有办法缩小依赖关系,以便它们只为特定的二进制文件构建？
有几种方法可以模拟您想要的内容：
原文链接：https://www.f2er.com/javaschema/282015.html1)将二进制文件转换为示例
Examples和测试是使用dev-dependencies构建的,因此您可以将这些依赖项移动到此部分中.图书馆不会依赖它们.
# File structure
conformal/
Cargo.toml
src/
lib.rs
examples/ # <-- the `ucitest` is
ucitest.rs # <-- moved to here
# Cargo.toml
[dependencies]
kdtree = { path = "../kdtree" }
rand = "0.3"
[dev-dependencies] # <-- move the examples-only dependencies here
serde = "1"
csv = "0.15"
crossbeam = "0.3"
num_cpus = "1"
[lib]
name = "conformal"
[[example]] # <--- declare the executable
name = "ucitest" # <--- as an example
要运行二进制文件,请使用：
cargo run --example ucitest
2)具有所需功能的可选依赖项
依赖关系可以是optional,因此依赖于您的保形库的其他包装箱将不需要下载它们.
从Rust 1.17开始,二进制文件可以声明它们require可以打开某些可选功能,从而有效地使这些库“仅用于二进制文件”.
# Cargo.toml
[dependencies]
kdtree = { path = "../kdtree" }
rand = "0.3"
serde = { version = "1",optional = true } # <-- make
csv = { version = "0.15",optional = true } # <-- all of
crossbeam = { version = "0.3",optional = true } # <-- them
num_cpus = { version = "1",optional = true } # <-- optional
[lib]
name = "conformal"
[features]
build-binary = ["serde","csv","crossbeam","num_cpus"]
[[bin]]
name = "ucitest"
required-features = ["build-binary"] # <--
请注意,在构建二进制文件时需要手动传递–features build-binary：
cargo run --features build-binary --bin ucitest
3)将二进制文件作为自己的包
当库和二进制文件是独立的包时,您可以执行任何依赖项管理.
# File structure
conformal/
Cargo.toml
src/
lib.rs
ucitest/ # <-- move ucitest
Cargo.toml # <-- into its own
src/ # <-- package.
main.rs
# ucitest/Cargo.toml
[dependencies]
conformal = { version = "0.1",path = "../" } # <-- explicitly depend on the library
serde = "1"
csv = "0.15"
crossbeam = "0.3"
num_cpus = "1"
