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2f5a64a8b3
When building only a single crate in the workspace to run its tests, we often recompile a lot of other, unrelated crates. Whenever cargo has a different set of crate features, it needs to recompile. By moving some features (non-exhaustive for now) to the workspace level, we always activate them an avoid recompiling. The cargo docs mismatch the behavior of cargo around default-deps, so I filed that upstream and left most `default-features` mismatches: https://github.com/rust-lang/cargo/issues/14841. Reference script: ```python import tomllib from collections import defaultdict from pathlib import Path uv = Path("/home/konsti/projects/uv") skip_list = ["uv-trampoline", "uv-dev", "uv-performance-flate2-backend", "uv-performance-memory-allocator"] root_feature_map = defaultdict(set) root_default_features = defaultdict(bool) cargo_toml = tomllib.loads(uv.joinpath("Cargo.toml").read_text()) for dep, declaration in cargo_toml["workspace"]["dependencies"].items(): root_default_features[dep] = root_default_features[dep] or declaration.get("default-features", True) root_feature_map[dep].update(declaration.get("features", [])) feature_map = defaultdict(set) default_features = defaultdict(bool) for crate in uv.joinpath("crates").iterdir(): if crate.name in skip_list: continue if not crate.joinpath("Cargo.toml").is_file(): continue cargo_toml = tomllib.loads(crate.joinpath("Cargo.toml").read_text()) for dep, declaration in cargo_toml.get("dependencies", {}).items(): # If any item uses default features, they are used everywhere default_features[dep] = default_features[dep] or declaration.get("default-features", True) feature_map[dep].update(declaration.get("features", [])) for dep, features in sorted(feature_map.items()): features = features - root_feature_map.get(dep, set()) if not features and default_features[dep] == root_default_features[dep]: continue print(dep, default_features[dep], sorted(features)) ``` |
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| .. | ||
| python | ||
| src | ||
| Cargo.toml | ||
| download-metadata.json | ||
| fetch-download-metadata.py | ||
| template-download-metadata.py | ||