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(hi Ed!)

I would definitely love to see Cargo have the ability to do this -- it means that `cargo install --locked` stays as a viable approach. It probably won't apply to fish, but I think being able to run a post-install command from the binary you just installed would suffice for my needs.

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We've actually added support to make single-binary fish deployments possible by (optionally) bundling static resources that would be part of the CMake-based deployment into the binary itself and having it unwrap those on first execution. The limitations of Cargo and the idiomatic `cargo install` usage primarily motivated this.

Ah interesting, I looked through your build.rs for the "installable" feature, and it looked like you were running sphinx-build in there. Do you plan to ship those artifacts in the .crate file?

I'm a big fan of this solution! It's always been annoying to perform all the ceremony involved in deploying a system with a bunch of files, with config, scripts and system written in a bunch of different languages.

In my current project I just wrote the installer and config generation as part of the main method. Gets rid of a lot of complexity, with a simpler build, and is arguably easier to maintain. Single language, single binary.

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