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//! Parser for `setup.cfg` files (Python / setuptools).
//!
//! Handles:
//! - `[metadata]` section: `name`, `version`
//! - `[options]` section: `install_requires` (multi-line list)
//! - `[options.extras_require]` section: optional dep groups → `DepKind::Optional`
use crate::pip::parse_pip_requirement;
use crate::{DeclaredDep, DepKind, ManifestError, ManifestParser, ParsedManifest};
/// Parser for `setup.cfg` files.
pub struct SetupCfgParser;
impl ManifestParser for SetupCfgParser {
fn filename(&self) -> &'static str {
"setup.cfg"
}
fn parse(&self, content: &str) -> Result<ParsedManifest, ManifestError> {
let mut name = None;
let mut version = None;
let mut deps: Vec<DeclaredDep> = Vec::new();
#[derive(PartialEq)]
enum Section {
Other,
Metadata,
Options,
Extras,
}
let mut section = Section::Other;
let mut collecting_requires = false;
let mut current_extras_kind = DepKind::Optional;
for line in content.lines() {
let trimmed = line.trim();
// Skip comments and blank lines (but blank lines reset continuation)
if trimmed.is_empty() {
collecting_requires = false;
continue;
}
if trimmed.starts_with('#') || trimmed.starts_with(';') {
continue;
}
// Section header
if trimmed.starts_with('[') && trimmed.ends_with(']') {
collecting_requires = false;
let sec = &trimmed[1..trimmed.len() - 1];
section = match sec {
"metadata" => Section::Metadata,
"options" => Section::Options,
s if s.starts_with("options.extras_require") => {
current_extras_kind = DepKind::Optional;
Section::Extras
}
_ => Section::Other,
};
continue;
}
// Continuation line (indented) — belongs to previous key
if line.starts_with([' ', '\t']) && collecting_requires {
let kind = if section == Section::Extras {
current_extras_kind
} else {
DepKind::Normal
};
if let Some(dep) = parse_pip_requirement(trimmed) {
deps.push(DeclaredDep { kind, ..dep });
}
continue;
}
// Key = value
if let Some(eq_idx) = trimmed.find('=') {
collecting_requires = false;
let key = trimmed[..eq_idx].trim();
let value = trimmed[eq_idx + 1..].trim();
match section {
Section::Metadata => match key {
"name" => name = Some(value.to_string()),
"version" => version = Some(value.to_string()),
_ => {}
},
Section::Options => {
if key == "install_requires" {
collecting_requires = true;
// Inline value (uncommon but possible)
if !value.is_empty()
&& let Some(dep) = parse_pip_requirement(value)
{
deps.push(dep);
}
}
}
Section::Extras => {
// extras_require section: each key is a group name (e.g. `dev =`)
// The value may be inline or multi-line
collecting_requires = true;
if !value.is_empty()
&& let Some(dep) = parse_pip_requirement(value)
{
deps.push(DeclaredDep {
kind: DepKind::Optional,
..dep
});
}
}
Section::Other => {}
}
}
}
Ok(ParsedManifest {
ecosystem: "python",
name,
version,
dependencies: deps,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::ManifestParser;
#[test]
fn test_parse_setup_cfg() {
let content = r#"[metadata]
name = my-package
version = 1.2.3
[options]
install_requires =
requests>=2.28
flask>=2.0
numpy
[options.extras_require]
dev =
pytest
black
"#;
let m = SetupCfgParser.parse(content).unwrap();
assert_eq!(m.ecosystem, "python");
assert_eq!(m.name.as_deref(), Some("my-package"));
assert_eq!(m.version.as_deref(), Some("1.2.3"));
let normal: Vec<_> = m
.dependencies
.iter()
.filter(|d| d.kind == DepKind::Normal)
.collect();
assert_eq!(normal.len(), 3);
assert!(normal.iter().any(|d| d.name == "requests"));
assert!(normal.iter().any(|d| d.name == "flask"));
assert!(normal.iter().any(|d| d.name == "numpy"));
let optional: Vec<_> = m
.dependencies
.iter()
.filter(|d| d.kind == DepKind::Optional)
.collect();
assert_eq!(optional.len(), 2);
}
}