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Support modules with different casing in build backend (#12240)

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Match the module name to its module directory with potentially different
casing.

For example, a package may have the dist-info-normalized package name
`pil_util`, but the importable module is named `PIL_util`.

We get the module name either as dist-info-normalized package name, or
explicitly from the user. For dist-info-normalizing a package name, the
rules are lowercasing, replacing `.` with `_` and replace `-` with `_`.
Since `.` and `-` are not allowed in module names, we can check whether
a directory name matches our expected module name by lowercasing it.

Fixes #12187

---------

Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
This commit is contained in:
konsti 2025-03-23 14:29:21 +01:00 • committed by GitHub
parent 9af989e30c
commit fb1b3232e8
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3 changed files with 187 additions and 13 deletions
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27
crates/uv-build-backend/src/lib.rs
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@ -7,15 +7,19 @@ pub use metadata::{check_direct_build, PyProjectToml};
pub use source_dist::{build_source_dist, list_source_dist};
pub use wheel::{build_editable, build_wheel, list_wheel, metadata};
use crate::metadata::ValidationError;
use std::fs::FileType;
use std::io;
use std::path::{Path, PathBuf};
use itertools::Itertools;
use thiserror::Error;
use tracing::debug;
use uv_fs::Simplified;
use uv_globfilter::PortableGlobError;
use uv_pypi_types::IdentifierParseError;
use uv_pypi_types::{Identifier, IdentifierParseError};
use crate::metadata::ValidationError;
#[derive(Debug, Error)]
pub enum Error {
@ -54,8 +58,25 @@ pub enum Error {
Zip(#[from] zip::result::ZipError),
#[error("Failed to write RECORD file")]
Csv(#[from] csv::Error),
#[error("Expected a Python module with an `__init__.py` at: `{}`", _0.user_display())]
#[error(
"Expected a Python module directory at: `{}`",
_0.user_display()
)]
MissingModule(PathBuf),
#[error(
"Expected an `__init__.py` at: `{}`",
_0.user_display()
)]
MissingInitPy(PathBuf),
#[error(
"Expected an `__init__.py` at `{}`, found multiple:\n* `{}`",
module_name,
paths.iter().map(Simplified::user_display).join("`\n* `")
)]
MultipleModules {
module_name: Identifier,
paths: Vec<PathBuf>,
},
#[error("Absolute module root is not allowed: `{}`", _0.display())]
AbsoluteModuleRoot(PathBuf),
#[error("Inconsistent metadata between prepare and build step: `{0}`")]