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rust: find nested packages in git repositories

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this mimics the heuristic cargo uses for finding crates in their git
repositories ([cargo-issue-1462]).

[cargo-issue-1462]: https://github.com/rust-lang/cargo/issues/1462
This commit is contained in:
Stefan Junker 2021-10-24 01:01:07 +02:00
parent 8dd1b6f151
commit b2aa19efe7
1 changed files with 20 additions and 9 deletions
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29
pkgs/build-support/rust/import-cargo-lock.nix
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@ -125,20 +125,31 @@ let
};
in runCommand "${pkg.name}-${pkg.version}" {} ''
tree=${tree}
if grep --quiet '\[workspace\]' "$tree/Cargo.toml"; then
# If the target package is in a workspace, find the crate path
# using `cargo metadata`.
crateCargoTOML=$(${cargo}/bin/cargo metadata --format-version 1 --no-deps --manifest-path $tree/Cargo.toml | \
${jq}/bin/jq -r '.packages[] | select(.name == "${pkg.name}") | .manifest_path')
# If the target package is in a workspace, or if it's the top-level
# crate, we should find the crate path using `cargo metadata`.
crateCargoTOML=$(${cargo}/bin/cargo metadata --format-version 1 --no-deps --manifest-path $tree/Cargo.toml | \
${jq}/bin/jq -r '.packages[] | select(.name == "${pkg.name}") | .manifest_path')
# If the repository is not a workspace the package might be in a subdirectory.
if [[ -z $crateCargoTOML ]]; then
for manifest in $(find $tree -name "Cargo.toml"); do
echo Looking at $manifest
crateCargoTOML=$(${cargo}/bin/cargo metadata --format-version 1 --no-deps --manifest-path "$manifest" | ${jq}/bin/jq -r '.packages[] | select(.name == "${pkg.name}") | .manifest_path' || :)
if [[ ! -z $crateCargoTOML ]]; then
tree=$(dirname $crateCargoTOML)
else
>&2 echo "Cannot find path for crate '${pkg.name}-${pkg.version}' in the Cargo workspace in: $tree"
exit 1
break
fi
done
if [[ -z $crateCargoTOML ]]; then
>&2 echo "Cannot find path for crate '${pkg.name}-${pkg.version}' in the tree in: $tree"
exit 1
fi
fi
echo Found crate ${pkg.name} at $crateCargoTOML
tree=$(dirname $crateCargoTOML)
cp -prvd "$tree/" $out
chmod u+w $out