`plotters 0.3.3` updated from `font-kit 0.10.0` to `0.11.0`. This is an
internal dependency and ostensibly wouldn't be a breaking change, except
that `font-kit 0.11.0` added a dependency on `yeslogic-fontconfig-sys`
which has additional system dependency requirements. This had the effect
of breaking compilation in a non-breaking release.
However, `font-kit` is only required for `BitMapBackend`, which is not
part of our public API and is only used by some of the `halo2_gadgets`
tests. So we can avoid affecting our downstream users by disabling the
default-enabled features of `plotters`.
This feature flag is not part of the public API, but only for
conditionally rendering sub-circuit graphs. Renaming it stops the
feature from being enabled in the workspace when we only want to enable
the `dev-graph` feature flag of `halo2_proofs`, which _is_ part of its
public API.
We also set `resolver = "2"` on the workspace; this is the default for
the root package in Rust 2021, but as we use a virtual workspace we need
to explicitly set it instead.
The published source code for each package needs to include the required
header file, and the path to that header file needs to be relative to
the package source (not the repository source). We therefore need to
have the header file present in each workspace package.
Closeszcash/halo2#506.
- The crate module structure from `orchard` has been flattened.
- The book pages we want to include in `halo2` have been moved to their
target location, to avoid any conflicts during the merge.
- Common files that already exist in zcash/halo2 have been removed.
Jack Grigg
Taylor Hornby
therealyingtong