#27 let the build context see vendor/, but the Dockerfile cooks the
dependencies before it copies the tree, from a recipe that carries only the
workspace's manifests. [patch.crates-io] points sieve-rs at vendor/, so the
cook failed the same way: failed to read /build/vendor/sieve-rs/Cargo.toml.
That's why 2026.9.24.2's publish failed. The builder stage now copies
vendor/ before cooking; a local build got past it into compiling the
dependencies.
context-check.py now also checks that each patched path is copied into the
cooking stage before the cook, and fails on the Dockerfile as it was.
The rename pass vendored a patched sieve-rs and pointed Cargo.toml's
[patch.crates-io] at vendor/sieve-rs. .dockerignore ignores everything and
re-includes a short list that did not have vendor on it, so the image build
had no such directory and stopped at
failed to load source for dependency `sieve-rs`
failed to read /build/vendor/sieve-rs/Cargo.toml
CI could not have caught that: it builds from a checkout, where the
directory is simply there, and only the image build has a context to prune.
The first that was known about it was a tag that had already been pushed.
So: vendor is re-included, and tools/fork/context-check.py now asserts the
thing that was quietly assumed -- every path a [patch] section names exists
and survives .dockerignore. It runs beside the other fork checks and takes
no toolchain.
Also, the comments in .dockerignore started with // , which Docker does not
read as a comment: they were patterns that happened to match nothing. They
are # now.
jcoffey-dev