I use Cargo to build a command-line tool written in Rust. I've also written an accompanying manpage, command.1. I'd like to tell Cargo about manpages via Cargo.toml, so that cargo install will install them to the appropriate location (gzip-compressed and installed to ${root}/share/man/man1/command.1.gz, where the section 1 in man1 gets extracted from the first character of the manpage extension).

Note that once Cargo has a mechanism for a post-build script, some packages may wish to use that to build the manpage. For instance, a package might parse --help output to generate a manpage, process some other document language to produce a manpage, or use help2man-like functionality from an argument parser. However, for a first pass, I'd just like to have support for installing manpages already written directly in manpage format.