Add support for unnamed local directory requirements

crates/pypi-types/src/metadata.rs

@@ -210,6 +210,30 @@ impl Metadata23 {
     }
 }
 
+/// Python Package Metadata 1.0 and later as specified in
+/// <https://peps.python.org/pep-0241/>.
+///
+/// This is a subset of the full metadata specification, and only includes the
+/// fields that have been consistent across all versions of the specification.
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+pub struct Metadata10 {
+    pub name: PackageName,
+}
+
+impl Metadata10 {
+    /// Parse the [`Metadata10`] from a `PKG-INFO` file, as included in a source distribution.
+    pub fn parse_pkg_info(content: &[u8]) -> Result<Self, Error> {
+        let headers = Headers::parse(content)?;
+        let name = PackageName::new(
+            headers
+                .get_first_value("Name")
+                .ok_or(Error::FieldNotFound("Name"))?,
+        )?;
+        Ok(Self { name })
+    }
+}
+
 /// Parse a `Metadata-Version` field into a (major, minor) tuple.
 fn parse_version(metadata_version: &str) -> Result<(u8, u8), Error> {
     let (major, minor) = metadata_version

crates/uv/Cargo.toml

@@ -14,6 +14,7 @@ default-run = "uv"
 workspace = true
 
 [dependencies]
+distribution-filename = { path = "../distribution-filename" }
 distribution-types = { path = "../distribution-types" }
 install-wheel-rs = { path = "../install-wheel-rs", features = ["clap"], default-features = false }
 pep508_rs = { path = "../pep508-rs" }
@@ -40,6 +41,7 @@ base64 = { workspace = true }
 chrono = { workspace = true }
 clap = { workspace = true, features = ["derive", "string"] }
 clap_complete_command = { workspace = true }
+configparser = { workspace = true }
 console = { workspace = true }
 ctrlc = { workspace = true }
 flate2 = { workspace = true, default-features = false }
@@ -48,8 +50,10 @@ indexmap = { workspace = true }
 indicatif = { workspace = true }
 itertools = { workspace = true }
 miette = { workspace = true, features = ["fancy"] }
+once_cell = { workspace = true }
 owo-colors = { workspace = true }
 pyproject-toml = { workspace = true }
+regex = { workspace = true }
 rustc-hash = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
@@ -64,7 +68,6 @@ tracing-subscriber = { workspace = true, features = ["json"] }
 tracing-tree = { workspace = true }
 unicode-width = { workspace = true }
 url = { workspace = true }
-distribution-filename = { version = "0.0.1", path = "../distribution-filename" }
 
 [target.'cfg(target_os = "windows")'.dependencies]
 mimalloc = { version = "0.1.39" }

crates/uv/src/requirements.rs

@@ -4,14 +4,21 @@ use std::path::{Path, PathBuf};
 use std::str::FromStr;
 
 use anyhow::{Context, Result};
+use configparser::ini::Ini;
 use console::Term;
 use distribution_filename::{SourceDistFilename, WheelFilename};
 use indexmap::IndexMap;
+use once_cell::sync::Lazy;
+use regex::Regex;
 use rustc_hash::FxHashSet;
-use tracing::{instrument, Level};
+use serde::Deserialize;
+use tracing::{debug, instrument, Level};
 
 use distribution_types::{FlatIndexLocation, IndexUrl, RemoteSource};
-use pep508_rs::{Requirement, RequirementsTxtRequirement, UnnamedRequirement, VersionOrUrl};
+use pep508_rs::{
+    Requirement, RequirementsTxtRequirement, Scheme, UnnamedRequirement, VersionOrUrl,
+};
+use pypi_types::Metadata10;
 use requirements_txt::{EditableRequirement, FindLink, RequirementsTxt};
 use uv_client::Connectivity;
 use uv_fs::Simplified;
@@ -576,8 +583,160 @@ impl NamedRequirements {
             });
         }
 
+        // Otherwise, download and/or extract the source archive.
+        if Scheme::parse(requirement.url.scheme()) == Some(Scheme::File) {
+            let path = requirement.url.to_file_path().map_err(|()| {
+                anyhow::anyhow!("Unable to convert file URL to path: {requirement}")
+            })?;
+
+            if !path.exists() {
+                return Err(anyhow::anyhow!(
+                    "Unnamed requirement at {path} not found",
+                    path = path.simplified_display()
+                ));
+            }
+
+            // Attempt to read a `PKG-INFO` from the directory.
+            if let Some(metadata) = fs_err::read(path.join("PKG-INFO"))
+                .ok()
+                .and_then(|contents| Metadata10::parse_pkg_info(&contents).ok())
+            {
+                debug!(
+                    "Found PKG-INFO metadata for {path} ({name})",
+                    path = path.display(),
+                    name = metadata.name
+                );
+                return Ok(Requirement {
+                    name: metadata.name,
+                    extras: requirement.extras,
+                    version_or_url: Some(VersionOrUrl::Url(requirement.url)),
+                    marker: requirement.marker,
+                });
+            }
+
+            // Attempt to read a `pyproject.toml` file.
+            if let Some(pyproject) = fs_err::read_to_string(path.join("pyproject.toml"))
+                .ok()
+                .and_then(|contents| toml::from_str::<PyProjectToml>(&contents).ok())
+            {
+                // Read PEP 621 metadata from the `pyproject.toml`.
+                if let Some(project) = pyproject.project {
+                    debug!(
+                        "Found PEP 621 metadata for {path} in `pyproject.toml` ({name})",
+                        path = path.display(),
+                        name = project.name
+                    );
+                    return Ok(Requirement {
+                        name: project.name,
+                        extras: requirement.extras,
+                        version_or_url: Some(VersionOrUrl::Url(requirement.url)),
+                        marker: requirement.marker,
+                    });
+                }
+
+                // Read Poetry-specific metadata from the `pyproject.toml`.
+                if let Some(tool) = pyproject.tool {
+                    if let Some(poetry) = tool.poetry {
+                        if let Some(name) = poetry.name {
+                            debug!(
+                                "Found Poetry metadata for {path} in `pyproject.toml` ({name})",
+                                path = path.display(),
+                                name = name
+                            );
+                            return Ok(Requirement {
+                                name,
+                                extras: requirement.extras,
+                                version_or_url: Some(VersionOrUrl::Url(requirement.url)),
+                                marker: requirement.marker,
+                            });
+                        }
+                    }
+                }
+            }
+
+            // Attempt to read a `setup.cfg` from the directory.
+            if let Some(setup_cfg) = fs_err::read_to_string(path.join("setup.cfg"))
+                .ok()
+                .and_then(|contents| {
+                    let mut ini = Ini::new_cs();
+                    ini.set_multiline(true);
+                    ini.read(contents).ok()
+                })
+            {
+                if let Some(section) = setup_cfg.get("metadata") {
+                    if let Some(Some(name)) = section.get("name") {
+                        if let Ok(name) = PackageName::from_str(name) {
+                            debug!(
+                                "Found setuptools metadata for {path} in `setup.cfg` ({name})",
+                                path = path.display(),
+                                name = name
+                            );
+                            return Ok(Requirement {
+                                name,
+                                extras: requirement.extras,
+                                version_or_url: Some(VersionOrUrl::Url(requirement.url)),
+                                marker: requirement.marker,
+                            });
+                        }
+                    }
+                }
+            }
+
+            // Attempt to read a `setup.py` from the directory.
+            if let Ok(setup_py) = fs_err::read_to_string(path.join("setup.py")) {
+                static SETUP_PY_NAME: Lazy<Regex> =
+                    Lazy::new(|| Regex::new(r#"name\s*[=:]\s*['"](?P<name>[^'"]+)['"]"#).unwrap());
+
+                if let Some(name) = SETUP_PY_NAME
+                    .captures(&setup_py)
+                    .and_then(|captures| captures.name("name"))
+                    .map(|name| name.as_str())
+                {
+                    if let Ok(name) = PackageName::from_str(name) {
+                        debug!(
+                            "Found setuptools metadata for {path} in `setup.py` ({name})",
+                            path = path.display(),
+                            name = name
+                        );
+                        return Ok(Requirement {
+                            name,
+                            extras: requirement.extras,
+                            version_or_url: Some(VersionOrUrl::Url(requirement.url)),
+                            marker: requirement.marker,
+                        });
+                    }
+                }
+            }
+        }
+
         Err(anyhow::anyhow!(
             "Unable to infer package name for the unnamed requirement: {requirement}"
         ))
     }
 }
+
+/// A pyproject.toml as specified in PEP 517.
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "kebab-case")]
+struct PyProjectToml {
+    project: Option<Project>,
+    tool: Option<Tool>,
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "kebab-case")]
+struct Project {
+    name: PackageName,
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "kebab-case")]
+struct Tool {
+    poetry: Option<ToolPoetry>,
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "kebab-case")]
+struct ToolPoetry {
+    name: Option<PackageName>,
+}

crates/uv/tests/pip_compile.rs

@@ -5746,3 +5746,72 @@ fn preserve_hashes_newer_version() -> Result<()> {
 
     Ok(())
 }
+
+/// Detect the package name from metadata sources from local directories.
+#[test]
+fn detect_package_name() -> Result<()> {
+    let context = TestContext::new("3.12");
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(indoc! {r"
+        ../../scripts/editable-installs/poetry_editable
+        ../../scripts/editable-installs/black_editable
+        ../../scripts/editable-installs/setup_py_editable
+        ../../scripts/editable-installs/setup_cfg_editable
+        "
+    })?;
+
+    let filter_path = regex::escape(&requirements_in.user_display().to_string());
+    let filters: Vec<_> = [(filter_path.as_str(), "requirements.in")]
+        .into_iter()
+        .chain(INSTA_FILTERS.to_vec())
+        .collect();
+
+    uv_snapshot!(filters, context.compile()
+        .arg(requirements_in.path())
+        .current_dir(current_dir()?), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] --exclude-newer 2023-11-18T12:00:00Z requirements.in
+    anyio==4.0.0
+        # via
+        #   httpx
+        #   poetry-editable
+    black @ ../../scripts/editable-installs/black_editable
+    certifi==2023.11.17
+        # via
+        #   httpcore
+        #   httpx
+        #   requests
+    charset-normalizer==3.3.2
+        # via requests
+    h11==0.14.0
+        # via httpcore
+    httpcore==1.0.2
+        # via httpx
+    httpx==0.25.1
+        # via setup-py-editable
+    idna==3.4
+        # via
+        #   anyio
+        #   httpx
+        #   requests
+    poetry-editable @ ../../scripts/editable-installs/poetry_editable
+    requests==2.31.0
+        # via setup-cfg-editable
+    setup-cfg-editable @ ../../scripts/editable-installs/setup_cfg_editable
+    setup-py-editable @ ../../scripts/editable-installs/setup_py_editable
+    sniffio==1.3.0
+        # via
+        #   anyio
+        #   httpx
+    urllib3==2.1.0
+        # via requests
+
+    ----- stderr -----
+    Resolved 14 packages in [TIME]
+    "###);
+
+    Ok(())
+}

scripts/editable-installs/setup_cfg_editable/.gitignore

@@ -0,0 +1,2 @@
+# Artifacts from the build process.
+*.egg-info/

scripts/editable-installs/setup_cfg_editable/setup.cfg

@@ -0,0 +1,3 @@
+[metadata]
+name = setup-cfg-editable
+version = 0.0.1

scripts/editable-installs/setup_cfg_editable/setup.py

@@ -0,0 +1,8 @@
+from setuptools import setup
+
+setup(
+    install_requires=[
+        "requests",
+        'importlib-metadata; python_version<"3.10"',
+    ],
+)

scripts/editable-installs/setup_py_editable/.gitignore

@@ -0,0 +1,2 @@
+# Artifacts from the build process.
+*.egg-info/

scripts/editable-installs/setup_py_editable/setup.py

@@ -0,0 +1,9 @@
+from setuptools import setup
+
+setup(
+    name="setup-py-editable",
+    version="0.0.1",
+    install_requires=[
+        "httpx",
+    ],
+)