I'm proud to announce cargo-cache 0.5.0!
cargo-cache is a program that lets you inspect and manage your local cargo-home, cargos download cache (usually at ~/.cargo/).
There's a new subcommand: cargo cache sc or cargo cache sccache that prints a table of files added per day of a local sccache build cache:
Files Day Size Percentage
1437 2020-07-26 751.63 MB 23.34 %
1729 2020-07-27 747.94 MB 23.22 %
963 2020-07-28 485.72 MB 15.08 %
1698 2020-07-29 997.70 MB 30.98 %
350 2020-07-30 237.70 MB 7.38 %
Total
6177 3.22 GB 100 %
There are no options to modify the cache though (use sccache for that).
(I might add something in the future, I dunno...)
A long-standing feature-request is finally implemented; a new subcommand "clean-unref" (cargo cache clean-unref) to prune the cache of all sources that are not referenced in the dep-tree of the project in the current workspace (or downwards).
By default, cargo-cache will try to find a Cargo.toml on its own, but you can also specify one via --manifest-path.
You can use this to reduce the size of your ${CARGO_HOME} if you want to cache it on CI (such as travis, azure or gha).
Fixed --keep-duplicate-crates handling of crates with alpha/beta etc labels.
Some NixOS related fixes to tests were also pushed.
If there are any bugs, let me know or file an issue on github.
Cheers 
links:
cargo-cache on github
cargo-cache on crates.io
changelog
edit: I never get the formatting right on the first try lol