rust-lang
diff --git a/‎Makefile.in
+1-1 b/‎Makefile.in
+1-1
diff --git a/‎src/bin/git_checkout.rs
+3-9 b/‎src/bin/git_checkout.rs
+3-9
diff --git a/‎src/bin/install.rs
+3-3 b/‎src/bin/install.rs
+3-3
diff --git a/‎src/bin/login.rs
+3-3 b/‎src/bin/login.rs
+3-3
diff --git a/‎src/cargo/core/dependency.rs
+12 b/‎src/cargo/core/dependency.rs
+12
diff --git a/‎src/cargo/core/manifest.rs
+10-1 b/‎src/cargo/core/manifest.rs
+10-1
diff --git a/‎src/cargo/core/package.rs
+8 b/‎src/cargo/core/package.rs
+8
diff --git a/‎src/cargo/core/package_id.rs
+33-7 b/‎src/cargo/core/package_id.rs
+33-7
diff --git a/‎src/cargo/core/registry.rs
+23-7 b/‎src/cargo/core/registry.rs
+23-7
@@ -136,7 +136,7 @@ clean:
 # === Documentation
 
 DOCS := index faq config guide manifest build-script pkgid-spec crates-io \
-	environment-variables specifying-dependencies
+	environment-variables specifying-dependencies source-replacement
 DOC_DIR := target/doc
 DOC_OPTS := --markdown-no-toc \
 		--markdown-css stylesheets/normalize.css \
 
@@ -1,6 +1,6 @@
 use cargo::core::source::{Source, SourceId, GitReference};
 use cargo::sources::git::{GitSource};
-use cargo::util::{Config, CliResult, CliError, human, ToUrl};
+use cargo::util::{Config, CliResult, ToUrl};
 
 #[derive(RustcDecodable)]
 pub struct Options {
@@ -37,20 +37,14 @@ pub fn execute(options: Options, config: &Config) -> CliResult<Option<()>> {
                           options.flag_locked));
     let Options { flag_url: url, flag_reference: reference, .. } = options;
 
-    let url = try!(url.to_url().map_err(|e| {
-                       human(format!("The URL `{}` you passed was \
-                                      not a valid URL: {}", url, e))
-                   })
-                   .map_err(|e| CliError::new(e, 1)));
+    let url = try!(url.to_url());
 
     let reference = GitReference::Branch(reference.clone());
     let source_id = SourceId::for_git(&url, reference);
 
     let mut source = GitSource::new(&source_id, config);
 
-    try!(source.update().map_err(|e| {
-        CliError::new(human(format!("Couldn't update {:?}: {:?}", source, e)), 1)
-    }));
+    try!(source.update());
 
     Ok(None)
 }
@@ -1,6 +1,6 @@
 use cargo::ops;
 use cargo::core::{SourceId, GitReference};
-use cargo::util::{CliResult, Config, ToUrl, human};
+use cargo::util::{CliResult, Config, ToUrl};
 
 #[derive(RustcDecodable)]
 pub struct Options {
@@ -116,7 +116,7 @@ pub fn execute(options: Options, config: &Config) -> CliResult<Option<()>> {
     };
 
     let source = if let Some(url) = options.flag_git {
-        let url = try!(url.to_url().map_err(human));
+        let url = try!(url.to_url());
         let gitref = if let Some(branch) = options.flag_branch {
             GitReference::Branch(branch)
         } else if let Some(tag) = options.flag_tag {
@@ -132,7 +132,7 @@ pub fn execute(options: Options, config: &Config) -> CliResult<Option<()>> {
     } else if options.arg_crate == None {
         try!(SourceId::for_path(&config.cwd()))
     } else {
-        try!(SourceId::for_central(config))
+        try!(SourceId::crates_io(config))
     };
 
     let krate = options.arg_crate.as_ref().map(|s| &s[..]);
 
@@ -43,10 +43,10 @@ pub fn execute(options: Options, config: &Config) -> CliResult<Option<()>> {
     let token = match options.arg_token.clone() {
         Some(token) => token,
         None => {
-            let src = try!(SourceId::for_central(config));
-            let mut src = RegistrySource::new(&src, config);
+            let src = try!(SourceId::crates_io(config));
+            let mut src = RegistrySource::remote(&src, config);
             try!(src.update());
-            let config = try!(src.config());
+            let config = try!(src.config()).unwrap();
             let host = options.flag_host.clone().unwrap_or(config.api);
             println!("please visit {}me and paste the API Token below", host);
             let mut line = String::new();
 
@@ -249,6 +249,7 @@ impl Dependency {
     pub fn is_transitive(&self) -> bool { self.inner.is_transitive() }
     pub fn is_build(&self) -> bool { self.inner.is_build() }
     pub fn is_optional(&self) -> bool { self.inner.is_optional() }
+
     /// Returns true if the default features of the dependency are requested.
     pub fn uses_default_features(&self) -> bool {
         self.inner.uses_default_features()
@@ -263,6 +264,17 @@ impl Dependency {
     pub fn matches_id(&self, id: &PackageId) -> bool {
         self.inner.matches_id(id)
     }
+
+    pub fn map_source(self, to_replace: &SourceId, replace_with: &SourceId)
+                      -> Dependency {
+        if self.source_id() != to_replace {
+            self
+        } else {
+            Rc::try_unwrap(self.inner).unwrap_or_else(|r| (*r).clone())
+               .set_source_id(replace_with.clone())
+               .into_dependency()
+        }
+    }
 }
 
 impl Platform {
 
@@ -4,7 +4,8 @@ use std::path::{PathBuf, Path};
 use semver::Version;
 use rustc_serialize::{Encoder, Encodable};
 
-use core::{Dependency, PackageId, PackageIdSpec, Summary, WorkspaceConfig};
+use core::{Dependency, PackageId, Summary, SourceId, PackageIdSpec};
+use core::WorkspaceConfig;
 use core::package_id::Metadata;
 
 pub enum EitherManifest {
@@ -232,6 +233,14 @@ impl Manifest {
     pub fn set_summary(&mut self, summary: Summary) {
         self.summary = summary;
     }
+
+    pub fn map_source(self, to_replace: &SourceId, replace_with: &SourceId)
+                      -> Manifest {
+        Manifest {
+            summary: self.summary.map_source(to_replace, replace_with),
+            ..self
+        }
+    }
 }
 
 impl VirtualManifest {
 
@@ -99,6 +99,14 @@ impl Package {
                                     .filter(|&(d, _)| d < 4);
         matches.min_by_key(|t| t.0).map(|t| t.1)
     }
+
+    pub fn map_source(self, to_replace: &SourceId, replace_with: &SourceId)
+                      -> Package {
+        Package {
+            manifest: self.manifest.map_source(to_replace, replace_with),
+            manifest_path: self.manifest_path,
+        }
+    }
 }
 
 impl fmt::Display for Package {
 
@@ -13,12 +13,12 @@ use util::{CargoResult, CargoError, short_hash, ToSemver};
 use core::source::SourceId;
 
 /// Identifier for a specific version of a package in a specific source.
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct PackageId {
     inner: Arc<PackageIdInner>,
 }
 
-#[derive(PartialEq, PartialOrd, Eq, Ord, Debug)]
+#[derive(PartialEq, PartialOrd, Eq, Ord)]
 struct PackageIdInner {
     name: String,
     version: semver::Version,
@@ -38,13 +38,19 @@ impl Decodable for PackageId {
     fn decode<D: Decoder>(d: &mut D) -> Result<PackageId, 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 captures = try!(regex.captures(&string).ok_or_else(|| {
+            d.error("invalid serialized PackageId")
+        }));
 
         let name = captures.at(1).unwrap();
         let version = captures.at(2).unwrap();
         let url = captures.at(3).unwrap();
-        let version = semver::Version::parse(version).ok().expect("invalid version");
-        let source_id = SourceId::from_url(url);
+        let version = try!(semver::Version::parse(version).map_err(|_| {
+            d.error("invalid version")
+        }));
+        let source_id = try!(SourceId::from_url(url).map_err(|e| {
+            d.error(&e.to_string())
+        }));
 
         Ok(PackageId {
             inner: Arc::new(PackageIdInner {
@@ -151,6 +157,16 @@ impl PackageId {
             }),
         }
     }
+
+    pub fn with_source_id(&self, source: &SourceId) -> PackageId {
+        PackageId {
+            inner: Arc::new(PackageIdInner {
+                name: self.inner.name.to_string(),
+                version: self.inner.version.clone(),
+                source_id: source.clone(),
+            }),
+        }
+    }
 }
 
 impl Metadata {
@@ -173,16 +189,26 @@ impl fmt::Display for PackageId {
     }
 }
 
+impl fmt::Debug for PackageId {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        f.debug_struct("PackageId")
+         .field("name", &self.inner.name)
+         .field("version", &self.inner.version.to_string())
+         .field("source", &self.inner.source_id.to_string())
+         .finish()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::PackageId;
     use core::source::SourceId;
-    use sources::RegistrySource;
+    use sources::CRATES_IO;
     use util::ToUrl;
 
     #[test]
     fn invalid_version_handled_nicely() {
-        let loc = RegistrySource::default_url().to_url().unwrap();
+        let loc = CRATES_IO.to_url().unwrap();
         let repo = SourceId::for_registry(&loc);
 
         assert!(PackageId::new("foo", "1.0", &repo).is_err());
 
@@ -3,13 +3,22 @@ use std::collections::{HashSet, HashMap};
 use core::{Source, SourceId, SourceMap, Summary, Dependency, PackageId, Package};
 use core::PackageSet;
 use util::{CargoResult, ChainError, Config, human, profile};
+use sources::config::SourceConfigMap;
 
 /// Source of information about a group of packages.
 ///
 /// See also `core::Source`.
 pub trait Registry {
     /// Attempt to find the packages that match a dependency request.
     fn query(&mut self, name: &Dependency) -> CargoResult<Vec<Summary>>;
+
+    /// Returns whether or not this registry will return summaries with
+    /// checksums listed.
+    ///
+    /// By default, registries do not support checksums.
+    fn supports_checksums(&self) -> bool {
+        false
+    }
 }
 
 impl Registry for Vec<Summary> {
@@ -26,6 +35,12 @@ impl Registry for Vec<Package> {
     }
 }
 
+impl<'a, T: ?Sized + Registry + 'a> Registry for Box<T> {
+    fn query(&mut self, name: &Dependency) -> CargoResult<Vec<Summary>> {
+        (**self).query(name)
+    }
+}
+
 /// This structure represents a registry of known packages. It internally
 /// contains a number of `Box<Source>` instances which are used to load a
 /// `Package` from.
@@ -41,7 +56,6 @@ impl Registry for Vec<Package> {
 /// operations if necessary) and is ready to be queried for packages.
 pub struct PackageRegistry<'cfg> {
     sources: SourceMap<'cfg>,
-    config: &'cfg Config,
 
     // A list of sources which are considered "overrides" which take precedent
     // when querying for packages.
@@ -65,6 +79,7 @@ pub struct PackageRegistry<'cfg> {
     source_ids: HashMap<SourceId, (SourceId, Kind)>,
 
     locked: HashMap<SourceId, HashMap<String, Vec<(PackageId, Vec<PackageId>)>>>,
+    source_config: SourceConfigMap<'cfg>,
 }
 
 #[derive(PartialEq, Eq, Clone, Copy)]
@@ -75,14 +90,15 @@ enum Kind {
 }
 
 impl<'cfg> PackageRegistry<'cfg> {
-    pub fn new(config: &'cfg Config) -> PackageRegistry<'cfg> {
-        PackageRegistry {
+    pub fn new(config: &'cfg Config) -> CargoResult<PackageRegistry<'cfg>> {
+        let source_config = try!(SourceConfigMap::new(config));
+        Ok(PackageRegistry {
             sources: SourceMap::new(),
             source_ids: HashMap::new(),
             overrides: Vec::new(),
-            config: config,
+            source_config: source_config,
             locked: HashMap::new(),
-        }
+        })
     }
 
     pub fn get(self, package_ids: &[PackageId]) -> PackageSet<'cfg> {
@@ -158,8 +174,8 @@ impl<'cfg> PackageRegistry<'cfg> {
 
     fn load(&mut self, source_id: &SourceId, kind: Kind) -> CargoResult<()> {
         (|| {
-            // Save off the source
-            let source = source_id.load(self.config);
+            let source = try!(self.source_config.load(source_id));
+
             if kind == Kind::Override {
                 self.overrides.push(source_id.clone());
             }
Original file line number	Diff line number	Diff line change
`@@ -99,6 +99,14 @@ impl Package {`
`99`	`99`	`.filter(\|&(d, _)\| d < 4);`
`100`	`100`	`matches.min_by_key(\|t\| t.0).map(\|t\| t.1)`
`101`	`101`	`}`
	`102`	`+`
	`103`	`+ pub fn map_source(self, to_replace: &SourceId, replace_with: &SourceId)`
	`104`	`+ -> Package {`
	`105`	`+ Package {`
	`106`	`+ manifest: self.manifest.map_source(to_replace, replace_with),`
	`107`	`+ manifest_path: self.manifest_path,`
	`108`	`+ }`
	`109`	`+ }`
`102`	`110`	`}`
`103`	`111`
`104`	`112`	`impl fmt::Display for Package {`