Prune crate dependencies in "target" folder
When cargo update fetches a new version of a crate, that new version of the crate will be
re-compiled as a dependency. However the library corresponding to the previous version continues
to remain in the dependency folder. They are distinguished by adding a hash at the end of the
library name. This makes the build cache grow in size in Travis etc. which is not desirable
as as both space and time to upload the cache are wasted. This utility allows for searching the
deps directory for duplicate libraries and prune them to contain only the latest.
By default ./target will be searched but via cmd line arguments one could specify a different
target directory. The target directory can have any complex hierarchy - they will be
recursively searched and pruned of duplicate library dependencies.
Currently this only works for .rlib dependencies.
E.g.:
- ./cargo-prune
- ./cargo-prune --target=some/path
- cargo prune (if installed to cargo bin directory)