英文:
How to locate the Cargo.lock from build.rs
问题
我想要能够在build.rs中读取Cargo.lock文件，而不必使用字面路径。
在build.rs中，可以使用std::env::var("CARGO_MANIFEST_DIR").unwrap();来查找Cargo.toml，传统上Cargo.lock位于该目录中，但是随着工作空间的引入，这不再总是正确的。
英文:
I want to be able to read the Cargo.lock file from build.rs without resorting to literal paths.
In build.rs, std::env::var("CARGO_MANIFEST_DIR").unwrap(); can be used to find the Cargo.toml, and traditionally the Cargo.lock was in this directory, however with the introduction of workspaces that is no longer always true.
答案1
得分: 1
https://crates.io/crates/project-root 可以用于从当前目录向上查找最近的Cargo.lock文件。
在Cargo.toml中添加：
[build-dependencies]
project-root = "*"
然后在build.rs中使用project_root::get_project_root().unwrap()来获取Cargo.lock所在的目录。
（最好找到一个不需要额外依赖的解决方案）
英文:
https://crates.io/crates/project-root can be used to find the nearest Cargo.lock up the directory structure from the current directory.
In Cargo.toml add
[build-dependencies]
project-root = "*"
And in build.rs use project_root::get_project_root().unwrap() to obtain the directory where Cargo.lock is.
(It would be nice to find a solution which doesn't need additional dependencies)
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