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//! Parser for `pubspec.yaml` files (Dart/Flutter).
//!
//! Uses indent-aware line parsing rather than a full YAML library.
//! Extracts `dependencies:` and `dev_dependencies:` sections.
use crate::{DeclaredDep, DepKind, ManifestError, ManifestParser, ParsedManifest};
/// Parser for `pubspec.yaml` files.
pub struct PubspecParser;
impl ManifestParser for PubspecParser {
fn filename(&self) -> &'static str {
"pubspec.yaml"
}
fn parse(&self, content: &str) -> Result<ParsedManifest, ManifestError> {
let mut name = None;
let mut version = None;
let mut deps = Vec::new();
#[derive(PartialEq, Clone, Copy)]
enum Section {
None,
Deps,
DevDeps,
}
let mut section = Section::None;
let mut section_indent = 0usize;
let mut dep_name: Option<(String, DepKind)> = None;
for line in content.lines() {
if line.trim().is_empty() || line.trim().starts_with('#') {
continue;
}
let indent = leading_spaces(line);
let trimmed = line.trim();
// Top-level keys (indent == 0)
if indent == 0 {
// Flush any pending dep with no version
if let Some((dname, dkind)) = dep_name.take() {
deps.push(DeclaredDep {
name: dname,
version_req: None,
kind: dkind,
});
}
if let Some(rest) = trimmed.strip_prefix("name:") {
name = rest
.trim()
.trim_matches('"')
.trim_matches('\'')
.to_string()
.into();
section = Section::None;
} else if let Some(rest) = trimmed.strip_prefix("version:") {
version = rest
.trim()
.trim_matches('"')
.trim_matches('\'')
.to_string()
.into();
section = Section::None;
} else if trimmed == "dependencies:" {
section = Section::Deps;
section_indent = 0;
} else if trimmed == "dev_dependencies:" {
section = Section::DevDeps;
section_indent = 0;
} else {
section = Section::None;
}
continue;
}
if section == Section::None {
continue;
}
let kind = if section == Section::DevDeps {
DepKind::Dev
} else {
DepKind::Normal
};
// First-level entries under the section
if section_indent == 0 || indent == section_indent {
// Flush previous dep
if let Some((dname, dkind)) = dep_name.take() {
deps.push(DeclaredDep {
name: dname,
version_req: None,
kind: dkind,
});
}
section_indent = indent;
// ` flutter:` or ` http: ^0.13.0`
if let Some(colon_idx) = trimmed.find(':') {
let pkg_name = trimmed[..colon_idx].trim().to_string();
let after_colon = trimmed[colon_idx + 1..].trim();
// Skip `sdk: flutter` — it's a platform dep, not a package
if after_colon == "sdk: flutter"
|| after_colon == "flutter"
|| after_colon.starts_with("sdk:")
{
continue;
}
if after_colon.is_empty() {
// Version (or sub-keys) on next line(s)
dep_name = Some((pkg_name, kind));
} else {
// Inline version: `http: ^0.13.0`
deps.push(DeclaredDep {
name: pkg_name,
version_req: Some(after_colon.to_string()),
kind,
});
}
}
} else if let Some((ref dname, dkind)) = dep_name {
// Sub-key of a dep: `version: ^1.0.0`, `path: ../pkg`, `sdk: flutter`, etc.
if trimmed.starts_with("sdk:") {
// Platform/SDK dep — discard, not a real package
dep_name = None;
} else if let Some(ver_rest) = trimmed.strip_prefix("version:") {
let ver = ver_rest.trim().to_string();
deps.push(DeclaredDep {
name: dname.clone(),
version_req: if ver.is_empty() { None } else { Some(ver) },
kind: dkind,
});
dep_name = None;
}
// git/path deps: dep_name remains; flushed at next sibling entry with no version_req
}
}
// Flush last pending dep
if let Some((dname, dkind)) = dep_name.take() {
deps.push(DeclaredDep {
name: dname,
version_req: None,
kind: dkind,
});
}
Ok(ParsedManifest {
ecosystem: "pub",
name,
version,
dependencies: deps,
})
}
}
fn leading_spaces(line: &str) -> usize {
line.len() - line.trim_start().len()
}
#[cfg(test)]
mod tests {
use super::*;
use crate::ManifestParser;
#[test]
fn test_parse_pubspec_yaml() {
let content = r#"name: my_flutter_app
version: 1.0.0+1
description: A new Flutter project.
dependencies:
flutter:
sdk: flutter
http: ^0.13.0
provider:
version: ^6.0.0
path_provider: ^2.0.0
dev_dependencies:
flutter_test:
sdk: flutter
mockito: ^5.0.0
"#;
let m = PubspecParser.parse(content).unwrap();
assert_eq!(m.ecosystem, "pub");
assert_eq!(m.name.as_deref(), Some("my_flutter_app"));
assert_eq!(m.version.as_deref(), Some("1.0.0+1"));
let normal: Vec<_> = m
.dependencies
.iter()
.filter(|d| d.kind == DepKind::Normal)
.collect();
// flutter (sdk) is filtered, http + provider + path_provider remain
assert_eq!(normal.len(), 3);
assert!(normal.iter().any(|d| d.name == "http"));
let http = m.dependencies.iter().find(|d| d.name == "http").unwrap();
assert_eq!(http.version_req.as_deref(), Some("^0.13.0"));
let dev: Vec<_> = m
.dependencies
.iter()
.filter(|d| d.kind == DepKind::Dev)
.collect();
// flutter_test (sdk) is filtered, mockito remains
assert_eq!(dev.len(), 1);
assert_eq!(dev[0].name, "mockito");
}
}