Post cargo install hook

[NicholasLYang]

Problem

I'm building a Rust binary that relies on a second binary¹ that the first one executes. I have the build.rs file that builds this second binary and places it next to the Rust binary. However, when I run cargo install, if I'm understanding this correctly, the Rust binary is first built then copied into the installation root. Is there a way to execute some code after cargo install that moves the second binary to the installation root as well?

Proposed Solution

Either a way of detecting in build.rs that we are running cargo install (maybe an environment variable?), or some sort of post-install hook that can let users customize the cargo install process.

Notes

No response

Footnotes

1. I can't link the two programs because of complicated issues. ↩

[ehuss]

I don't believe there is currently a mechanism to do that. The current recommended approach is to use an outer general-purpose build system (or write your own scripts using the cargo-xtask pattern). I believe this is more or less a duplicate of #2386, so closing in favor of that.