Cargo clippy produces a lot of warnings that should be easily fixable.

This one is not fixed in the change I just posted:

warning: large size difference between variants
  --> src/changestore.rs:22:1
   |
22 | / pub enum Error {
23 | |     #[error(transparent)]
24 | |     Io(#[from] std::io::Error),
25 | |     #[error(transparent)]
...  |
28 | |     Change(#[from] libpijul::change::ChangeError),
   | |     --------------------------------------------- the second-largest variant contains at least 72 bytes
...  |
32 | |     Tag(#[from] libpijul::tag::TagError),
   | |     ------------------------------------ the largest variant contains at least 328 bytes
33 | |     #[error(transparent)]
34 | |     Persist(#[from] tempfile::PersistError),
35 | | }
   | |_^ the entire enum is at least 328 bytes
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
   = note: `#[warn(clippy::large_enum_variant)]` on by default
help: consider boxing the large fields to reduce the total size of the enum
   |
32 |     Tag(#[from] Box<libpijul::tag::TagError>),
   |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

warning: the `Err`-variant returned from this function is very large
  --> src/changestore.rs:46:33
   |
32 |     Tag(#[from] libpijul::tag::TagError),
   |     ------------------------------------ the largest variant contains at least 328 bytes
...
46 |     fn load(&self, h: &Hash) -> Result<(), Error> {
   |                                 ^^^^^^^^^^^^^^^^^
   |
   = help: try reducing the size of `changestore::Error`, for example by boxing large elements or replacing it with `Box<changestore::Error>`
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#result_large_err
   = note: `#[warn(clippy::result_large_err)]` on by default

warning: `pijul-export` (bin "pijul-export") generated 2 warnings

And thanks for a great tool btw :-) found it really useful!