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use std::collections::{HashMap, BTreeMap}; use regex::Regex; use rustc_serialize::{Encodable, Encoder, Decodable, Decoder}; use core::{PackageId, SourceId}; use util::{CargoResult, Graph}; use super::Resolve; #[derive(RustcEncodable, RustcDecodable, Debug)] pub struct EncodableResolve { package: Option<Vec<EncodableDependency>>, root: EncodableDependency, metadata: Option<Metadata>, } pub type Metadata = BTreeMap<String, String>; impl EncodableResolve { pub fn to_resolve(&self, default: &SourceId) -> CargoResult<Resolve> { let mut g = Graph::new(); let mut tmp = HashMap::new(); let packages = Vec::new(); let packages = self.package.as_ref().unwrap_or(&packages); { let mut register_pkg = |pkg: &EncodableDependency| -> CargoResult<()> { let pkgid = try!(pkg.to_package_id(default)); let precise = pkgid.source_id().precise() .map(|s| s.to_string()); assert!(tmp.insert(pkgid.clone(), precise).is_none(), "a package was referenced twice in the lockfile"); g.add(try!(pkg.to_package_id(default)), &[]); Ok(()) }; try!(register_pkg(&self.root)); for pkg in packages.iter() { try!(register_pkg(pkg)); } } { let mut add_dependencies = |pkg: &EncodableDependency| -> CargoResult<()> { let package_id = try!(pkg.to_package_id(default)); let deps = match pkg.dependencies { Some(ref deps) => deps, None => return Ok(()), }; for edge in deps.iter() { let to_depend_on = try!(edge.to_package_id(default)); let precise_pkgid = tmp.get(&to_depend_on) .map(|p| to_depend_on.with_precise(p.clone())) .unwrap_or(to_depend_on.clone()); g.link(package_id.clone(), precise_pkgid); } Ok(()) }; try!(add_dependencies(&self.root)); for pkg in packages.iter() { try!(add_dependencies(pkg)); } } Ok(Resolve { graph: g, root: try!(self.root.to_package_id(default)), features: HashMap::new(), metadata: self.metadata.clone(), }) } } #[derive(RustcEncodable, RustcDecodable, Debug, PartialOrd, Ord, PartialEq, Eq)] pub struct EncodableDependency { name: String, version: String, source: Option<SourceId>, dependencies: Option<Vec<EncodablePackageId>> } impl EncodableDependency { fn to_package_id(&self, default_source: &SourceId) -> CargoResult<PackageId> { PackageId::new( &self.name, &self.version, self.source.as_ref().unwrap_or(default_source)) } } #[derive(Debug, PartialOrd, Ord, PartialEq, Eq)] pub struct EncodablePackageId { name: String, version: String, source: Option<SourceId> } impl Encodable for EncodablePackageId { fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { let mut out = format!("{} {}", self.name, self.version); if let Some(ref s) = self.source { out.push_str(&format!(" ({})", s.to_url())); } out.encode(s) } } impl Decodable for EncodablePackageId { fn decode<D: Decoder>(d: &mut D) -> Result<EncodablePackageId, D::Error> { let string: String = try!(Decodable::decode(d)); let regex = Regex::new(r"^([^ ]+) ([^ ]+)(?: \(([^\)]+)\))?$").unwrap(); let captures = regex.captures(&string) .expect("invalid serialized PackageId"); let name = captures.at(1).unwrap(); let version = captures.at(2).unwrap(); let source = captures.at(3); let source_id = source.map(|s| SourceId::from_url(s.to_string())); Ok(EncodablePackageId { name: name.to_string(), version: version.to_string(), source: source_id }) } } impl EncodablePackageId { fn to_package_id(&self, default_source: &SourceId) -> CargoResult<PackageId> { PackageId::new( &self.name, &self.version, self.source.as_ref().unwrap_or(default_source)) } } impl Encodable for Resolve { fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { let mut ids: Vec<&PackageId> = self.graph.iter().collect(); ids.sort(); let encodable = ids.iter().filter_map(|&id| { if self.root == *id { return None; } Some(encodable_resolve_node(id, &self.root, &self.graph)) }).collect::<Vec<EncodableDependency>>(); EncodableResolve { package: Some(encodable), root: encodable_resolve_node(&self.root, &self.root, &self.graph), metadata: self.metadata.clone(), }.encode(s) } } fn encodable_resolve_node(id: &PackageId, root: &PackageId, graph: &Graph<PackageId>) -> EncodableDependency { let deps = graph.edges(id).map(|edge| { let mut deps = edge.map(|e| { encodable_package_id(e, root) }).collect::<Vec<EncodablePackageId>>(); deps.sort(); deps }); let source = if id.source_id() == root.source_id() { None } else { Some(id.source_id().clone()) }; EncodableDependency { name: id.name().to_string(), version: id.version().to_string(), source: source, dependencies: deps, } } fn encodable_package_id(id: &PackageId, root: &PackageId) -> EncodablePackageId { let source = if id.source_id() == root.source_id() { None } else { Some(id.source_id().with_precise(None)) }; EncodablePackageId { name: id.name().to_string(), version: id.version().to_string(), source: source, } }