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https://github.com/astral-sh/uv.git
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Refactor extract_pep517_backend
This commit is contained in:
konstin
parent
7b8240dca9
commit
a34662ac4b
1 changed files with 98 additions and 97 deletions
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@ -557,105 +557,13 @@ impl SourceBuild {
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source_strategy: SourceStrategy,
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workspace_cache: &WorkspaceCache,
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) -> Result<(Pep517Backend, Option<Project>), Box<Error>> {
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match fs::read_to_string(source_tree.join("pyproject.toml")) {
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let pyproject_toml = match fs::read_to_string(source_tree.join("pyproject.toml")) {
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Ok(toml) => {
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let pyproject_toml = toml_edit::Document::from_str(&toml)
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.map_err(Error::InvalidPyprojectTomlSyntax)?;
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let pyproject_toml = PyProjectToml::deserialize(pyproject_toml.into_deserializer())
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.map_err(Error::InvalidPyprojectTomlSchema)?;
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let backend = if let Some(build_system) = pyproject_toml.build_system {
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// If necessary, lower the requirements.
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let requirements = match source_strategy {
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SourceStrategy::Enabled => {
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if let Some(name) = pyproject_toml
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.project
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.as_ref()
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.map(|project| &project.name)
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.or(package_name)
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{
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let build_requires = uv_pypi_types::BuildRequires {
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name: Some(name.clone()),
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requires_dist: build_system.requires,
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};
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let build_requires = BuildRequires::from_project_maybe_workspace(
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build_requires,
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install_path,
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locations,
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source_strategy,
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workspace_cache,
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)
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.await
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.map_err(Error::Lowering)?;
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build_requires.requires_dist
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} else {
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build_system
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.requires
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.into_iter()
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.map(Requirement::from)
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.collect()
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}
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}
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SourceStrategy::Disabled => build_system
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.requires
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.into_iter()
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.map(Requirement::from)
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.collect(),
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};
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Pep517Backend {
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// If `build-backend` is missing, inject the legacy setuptools backend, but
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// retain the `requires`, to match `pip` and `build`. Note that while PEP 517
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// says that in this case we "should revert to the legacy behaviour of running
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// `setup.py` (either directly, or by implicitly invoking the
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// `setuptools.build_meta:__legacy__` backend)", we found that in practice, only
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// the legacy setuptools backend is allowed. See also:
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// https://github.com/pypa/build/blob/de5b44b0c28c598524832dff685a98d5a5148c44/src/build/__init__.py#L114-L118
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backend: build_system
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.build_backend
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.unwrap_or_else(|| "setuptools.build_meta:__legacy__".to_string()),
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backend_path: build_system.backend_path,
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requirements,
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}
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} else {
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// If a `pyproject.toml` is present, but `[build-system]` is missing, proceed
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// with a PEP 517 build using the default backend (`setuptools`), to match `pip`
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// and `build`.
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//
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// If there is no build system defined and there is no metadata source for
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// `setuptools`, warn. The build will succeed, but the metadata will be
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// incomplete (for example, the package name will be `UNKNOWN`).
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if pyproject_toml.project.is_none()
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&& !source_tree.join("setup.py").is_file()
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&& !source_tree.join("setup.cfg").is_file()
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{
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// Give a specific hint for `uv pip install .` in a workspace root.
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let looks_like_workspace_root = pyproject_toml
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.tool
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.as_ref()
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.and_then(|tool| tool.uv.as_ref())
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.and_then(|tool| tool.workspace.as_ref())
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.is_some();
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if looks_like_workspace_root {
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warn_user_once!(
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"`{}` appears to be a workspace root without a Python project; \
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consider using `uv sync` to install the workspace, or add a \
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`[build-system]` table to `pyproject.toml`",
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source_tree.simplified_display().cyan(),
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);
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} else {
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warn_user_once!(
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"`{}` does not appear to be a Python project, as the `pyproject.toml` \
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does not include a `[build-system]` table, and neither `setup.py` \
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nor `setup.cfg` are present in the directory",
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source_tree.simplified_display().cyan(),
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);
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}
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}
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DEFAULT_BACKEND.clone()
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};
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Ok((backend, pyproject_toml.project))
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pyproject_toml
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}
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Err(err) if err.kind() == io::ErrorKind::NotFound => {
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// We require either a `pyproject.toml` or a `setup.py` file at the top level.
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@ -669,10 +577,103 @@ impl SourceBuild {
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// the default backend, to match `build`. `pip` uses `setup.py` directly in this
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// case, but plans to make PEP 517 builds the default in the future.
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// See: https://github.com/pypa/pip/issues/9175.
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Ok((DEFAULT_BACKEND.clone(), None))
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return Ok((default_backend.clone(), None));
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}
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Err(err) => Err(Box::new(err.into())),
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}
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Err(err) => return Err(Box::new(err.into())),
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};
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let backend = if let Some(build_system) = pyproject_toml.build_system {
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// If necessary, lower the requirements.
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let requirements = match source_strategy {
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SourceStrategy::Enabled => {
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if let Some(name) = pyproject_toml
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.project
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.as_ref()
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.map(|project| &project.name)
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.or(package_name)
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{
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let build_requires = uv_pypi_types::BuildRequires {
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name: Some(name.clone()),
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requires_dist: build_system.requires,
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};
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let build_requires = BuildRequires::from_project_maybe_workspace(
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build_requires,
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install_path,
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locations,
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source_strategy,
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workspace_cache,
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)
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.await
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.map_err(Error::Lowering)?;
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build_requires.requires_dist
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} else {
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build_system
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.requires
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.into_iter()
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.map(Requirement::from)
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.collect()
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}
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}
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SourceStrategy::Disabled => build_system
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.requires
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.into_iter()
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.map(Requirement::from)
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.collect(),
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};
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Pep517Backend {
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// If `build-backend` is missing, inject the legacy setuptools backend, but
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// retain the `requires`, to match `pip` and `build`. Note that while PEP 517
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// says that in this case we "should revert to the legacy behaviour of running
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// `setup.py` (either directly, or by implicitly invoking the
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// `setuptools.build_meta:__legacy__` backend)", we found that in practice, only
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// the legacy setuptools backend is allowed. See also:
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// https://github.com/pypa/build/blob/de5b44b0c28c598524832dff685a98d5a5148c44/src/build/__init__.py#L114-L118
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backend: build_system
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.build_backend
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.unwrap_or_else(|| "setuptools.build_meta:__legacy__".to_string()),
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backend_path: build_system.backend_path,
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requirements,
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}
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} else {
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// If a `pyproject.toml` is present, but `[build-system]` is missing, proceed
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// with a PEP 517 build using the default backend (`setuptools`), to match `pip`
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// and `build`.
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//
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// If there is no build system defined and there is no metadata source for
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// `setuptools`, warn. The build will succeed, but the metadata will be
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// incomplete (for example, the package name will be `UNKNOWN`).
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if pyproject_toml.project.is_none()
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&& !source_tree.join("setup.py").is_file()
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&& !source_tree.join("setup.cfg").is_file()
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{
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// Give a specific hint for `uv pip install .` in a workspace root.
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let looks_like_workspace_root = pyproject_toml
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.tool
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.as_ref()
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.and_then(|tool| tool.uv.as_ref())
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.and_then(|tool| tool.workspace.as_ref())
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.is_some();
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if looks_like_workspace_root {
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warn_user_once!(
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"`{}` appears to be a workspace root without a Python project; \
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consider using `uv sync` to install the workspace, or add a \
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`[build-system]` table to `pyproject.toml`",
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source_tree.simplified_display().cyan(),
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);
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} else {
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warn_user_once!(
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"`{}` does not appear to be a Python project, as the `pyproject.toml` \
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does not include a `[build-system]` table, and neither `setup.py` \
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nor `setup.cfg` are present in the directory",
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source_tree.simplified_display().cyan(),
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);
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}
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}
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DEFAULT_BACKEND.clone()
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};
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Ok((backend, pyproject_toml.project))
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}
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/// Try calling `prepare_metadata_for_build_wheel` to get the metadata without executing the
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