tree 3b008b96f24d2898cf93fe66fe58e070f0dcb2ac
parent a490450ec29479e16848f06d88f0bff29e4d05ba
author Arman Uguray <armansito@google.com> 1719547440 -0700
committer Arman Uguray <armansito@google.com> 1719547440 -0700

[vello_shaders] Bring back the Bazel build hack

Skia, an external consumer of this crate, uses Bazel rules to compile
Rust code. Due to limitations in Bazel's rust support, the
CARGO_MANIFEST_DIR environment variable isn't set properly for
nested crates as Bazel always seems to assign the workspace root
instead.

Until we figure out a better way to manage the bazel integration, this
PR reintroduces a recently-removed hack to work around this by allowing
the crate manifest path to be assigned explicitly, using a new
environment variable called `BAZEL_CRATE_MANIFEST_PATH`. This is
intended to be the absolute path to `vello_shaders/Cargo.toml` within
the bazel sandbox file system.