I want to use Cargo commands (cargo build in this instance) programmatically without running the command with std::process::Command in Rust.
How can I do that?
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1Can you elaborate on exactly why you want to do this, as there's probably A Better Way?– eggyalCommented Sep 11, 2021 at 10:39
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I can only have a process running due to the limitation my serverless-like container has.– Pixel CoderCommented Sep 11, 2021 at 10:56
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6Even if you drive Cargo programmatically, it doesn't call rustc in-process (and rustc doesn't call the linker in-process) so you still won't actually be able to compile anything.– eggyalCommented Sep 11, 2021 at 11:00
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1 Answer
Add the cargo (docs) crate to your dependencies, and you can use Cargo as a library! It doesn't have any stability guarantees or much documentation though, so you might want to read through how the Cargo CLI tool uses the library to figure out how to use it. To do a build, cargo::ops::compile is the function to call.
But do keep in mind that the Cargo library will still run rustc in another process using Command::new, so this is really just moving where the process boundary is, not eliminating it entirely.
