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use std::collections::HashMap; use std::fmt; use semver::Version; use url::Url; use core::PackageId; use util::{CargoResult, ToUrl, human, ToSemver, ChainError}; #[derive(Clone, PartialEq, Eq, Debug)] pub struct PackageIdSpec { name: String, version: Option<Version>, url: Option<Url>, } impl PackageIdSpec { pub fn parse(spec: &str) -> CargoResult<PackageIdSpec> { if spec.contains("/") { if let Ok(url) = spec.to_url() { return PackageIdSpec::from_url(url); } if !spec.contains("://") { if let Ok(url) = Url::parse(&format!("cargo://{}", spec)) { return PackageIdSpec::from_url(url); } } } let mut parts = spec.splitn(2, ':'); let name = parts.next().unwrap(); let version = match parts.next() { Some(version) => Some(try!(Version::parse(version).map_err(human))), None => None, }; for ch in name.chars() { if !ch.is_alphanumeric() && ch != '_' && ch != '-' { bail!("invalid character in pkgid `{}`: `{}`", spec, ch) } } Ok(PackageIdSpec { name: name.to_string(), version: version, url: None, }) } pub fn query_str<'a, I>(spec: &str, i: I) -> CargoResult<&'a PackageId> where I: IntoIterator<Item=&'a PackageId> { let spec = try!(PackageIdSpec::parse(spec).chain_error(|| { human(format!("invalid package id specification: `{}`", spec)) })); spec.query(i) } pub fn from_package_id(package_id: &PackageId) -> PackageIdSpec { PackageIdSpec { name: package_id.name().to_string(), version: Some(package_id.version().clone()), url: Some(package_id.source_id().url().clone()), } } fn from_url(mut url: Url) -> CargoResult<PackageIdSpec> { if url.query().is_some() { bail!("cannot have a query string in a pkgid: {}", url) } let frag = url.fragment().map(|s| s.to_owned()); url.set_fragment(None); let (name, version) = { let mut path = try!(url.path_segments().chain_error(|| { human(format!("pkgid urls must have a path: {}", url)) })); let path_name = try!(path.next_back().chain_error(|| { human(format!("pkgid urls must have at least one path \ component: {}", url)) })); match frag { Some(fragment) => { let mut parts = fragment.splitn(2, ':'); let name_or_version = parts.next().unwrap(); match parts.next() { Some(part) => { let version = try!(part.to_semver().map_err(human)); (name_or_version.to_string(), Some(version)) } None => { if name_or_version.chars().next().unwrap() .is_alphabetic() { (name_or_version.to_string(), None) } else { let version = try!(name_or_version.to_semver() .map_err(human)); (path_name.to_string(), Some(version)) } } } } None => (path_name.to_string(), None), } }; Ok(PackageIdSpec { name: name, version: version, url: Some(url), }) } pub fn name(&self) -> &str { &self.name } pub fn version(&self) -> Option<&Version> { self.version.as_ref() } pub fn url(&self) -> Option<&Url> { self.url.as_ref() } pub fn matches(&self, package_id: &PackageId) -> bool { if self.name() != package_id.name() { return false } match self.version { Some(ref v) => if v != package_id.version() { return false }, None => {} } match self.url { Some(ref u) => u == package_id.source_id().url(), None => true } } pub fn query<'a, I>(&self, i: I) -> CargoResult<&'a PackageId> where I: IntoIterator<Item=&'a PackageId> { let mut ids = i.into_iter().filter(|p| self.matches(*p)); let ret = match ids.next() { Some(id) => id, None => bail!("package id specification `{}` \ matched no packages", self), }; return match ids.next() { Some(other) => { let mut msg = format!("There are multiple `{}` packages in \ your project, and the specification \ `{}` is ambiguous.\n\ Please re-run this command \ with `-p <spec>` where `<spec>` is one \ of the following:", self.name(), self); let mut vec = vec![ret, other]; vec.extend(ids); minimize(&mut msg, vec, self); Err(human(msg)) } None => Ok(ret) }; fn minimize(msg: &mut String, ids: Vec<&PackageId>, spec: &PackageIdSpec) { let mut version_cnt = HashMap::new(); for id in ids.iter() { *version_cnt.entry(id.version()).or_insert(0) += 1; } for id in ids.iter() { if version_cnt[id.version()] == 1 { msg.push_str(&format!("\n {}:{}", spec.name(), id.version())); } else { msg.push_str(&format!("\n {}", PackageIdSpec::from_package_id(*id))); } } } } } impl fmt::Display for PackageIdSpec { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let mut printed_name = false; match self.url { Some(ref url) => { if url.scheme() == "cargo" { try!(write!(f, "{}{}", url.host().unwrap(), url.path())); } else { try!(write!(f, "{}", url)); } if url.path_segments().unwrap().next_back().unwrap() != &self.name { printed_name = true; try!(write!(f, "#{}", self.name)); } } None => { printed_name = true; try!(write!(f, "{}", self.name)) } } match self.version { Some(ref v) => { try!(write!(f, "{}{}", if printed_name {":"} else {"#"}, v)); } None => {} } Ok(()) } } #[cfg(test)] mod tests { use core::{PackageId, SourceId}; use super::PackageIdSpec; use url::Url; use semver::Version; #[test] fn good_parsing() { fn ok(spec: &str, expected: PackageIdSpec) { let parsed = PackageIdSpec::parse(spec).unwrap(); assert_eq!(parsed, expected); assert_eq!(parsed.to_string(), spec); } ok("http://crates.io/foo#1.2.3", PackageIdSpec { name: "foo".to_string(), version: Some(Version::parse("1.2.3").unwrap()), url: Some(Url::parse("http://crates.io/foo").unwrap()), }); ok("http://crates.io/foo#bar:1.2.3", PackageIdSpec { name: "bar".to_string(), version: Some(Version::parse("1.2.3").unwrap()), url: Some(Url::parse("http://crates.io/foo").unwrap()), }); ok("crates.io/foo", PackageIdSpec { name: "foo".to_string(), version: None, url: Some(Url::parse("cargo://crates.io/foo").unwrap()), }); ok("crates.io/foo#1.2.3", PackageIdSpec { name: "foo".to_string(), version: Some(Version::parse("1.2.3").unwrap()), url: Some(Url::parse("cargo://crates.io/foo").unwrap()), }); ok("crates.io/foo#bar", PackageIdSpec { name: "bar".to_string(), version: None, url: Some(Url::parse("cargo://crates.io/foo").unwrap()), }); ok("crates.io/foo#bar:1.2.3", PackageIdSpec { name: "bar".to_string(), version: Some(Version::parse("1.2.3").unwrap()), url: Some(Url::parse("cargo://crates.io/foo").unwrap()), }); ok("foo", PackageIdSpec { name: "foo".to_string(), version: None, url: None, }); ok("foo:1.2.3", PackageIdSpec { name: "foo".to_string(), version: Some(Version::parse("1.2.3").unwrap()), url: None, }); } #[test] fn bad_parsing() { assert!(PackageIdSpec::parse("baz:").is_err()); assert!(PackageIdSpec::parse("baz:1.0").is_err()); assert!(PackageIdSpec::parse("http://baz:1.0").is_err()); assert!(PackageIdSpec::parse("http://#baz:1.0").is_err()); } #[test] fn matching() { let url = Url::parse("http://example.com").unwrap(); let sid = SourceId::for_registry(&url); let foo = PackageId::new("foo", "1.2.3", &sid).unwrap(); let bar = PackageId::new("bar", "1.2.3", &sid).unwrap(); assert!( PackageIdSpec::parse("foo").unwrap().matches(&foo)); assert!(!PackageIdSpec::parse("foo").unwrap().matches(&bar)); assert!( PackageIdSpec::parse("foo:1.2.3").unwrap().matches(&foo)); assert!(!PackageIdSpec::parse("foo:1.2.2").unwrap().matches(&foo)); } }