Ignore summaries in downloaded crates

Unfortunately historical Cargo bugs have made it such that the index sometimes
differs from the actual crate we download. Let's respect the index, however,
which should be our source of truth.

Closes #3214

Author: alexcrichton

src/cargo/core/manifest.rs

@@ -185,7 +185,8 @@ impl Encodable for Target {
 }
 
 impl Manifest {
-    pub fn new(summary: Summary, targets: Vec<Target>,
+    pub fn new(summary: Summary,
+               targets: Vec<Target>,
                exclude: Vec<String>,
                include: Vec<String>,
                links: Option<String>,

src/cargo/sources/registry/mod.rs

@@ -359,7 +359,19 @@ impl<'cfg> Source for RegistrySource<'cfg> {
         }));
         let mut src = PathSource::new(&path, &self.source_id, self.config);
         try!(src.update());
-        src.download(package)
+        let pkg = try!(src.download(package));
+
+        // Unfortunately the index and the actual Cargo.toml in the index can
+        // differ due to historical Cargo bugs. To paper over these we trash the
+        // *summary* loaded from the Cargo.toml we just downloaded with the one
+        // we loaded from the index.
+        let summaries = try!(self.index.summaries(package.name()));
+        let summary = summaries.iter().map(|s| &s.0).find(|s| {
+            s.package_id() == package
+        }).expect("summary not found");
+        let mut manifest = pkg.manifest().clone();
+        manifest.set_summary(summary.clone());
+        Ok(Package::new(manifest, pkg.manifest_path()))
     }
 
     fn fingerprint(&self, pkg: &Package) -> CargoResult<String> {

tests/cargotest/support/registry.rs

@@ -141,7 +141,7 @@ impl Package {
             map.insert("name".to_string(), dep.name.to_json());
             map.insert("req".to_string(), dep.vers.to_json());
             map.insert("features".to_string(), dep.features.to_json());
-            map.insert("default_features".to_string(), false.to_json());
+            map.insert("default_features".to_string(), true.to_json());
             map.insert("target".to_string(), dep.target.to_json());
             map.insert("optional".to_string(), false.to_json());
             map.insert("kind".to_string(), dep.kind.to_json());
@@ -211,7 +211,7 @@ impl Package {
         for dep in self.deps.iter() {
             let target = match dep.target {
                 None => String::new(),
-                Some(ref s) => format!("target.{}.", s),
+                Some(ref s) => format!("target.'{}'.", s),
             };
             let kind = match &dep.kind[..] {
                 "build" => "build-",

tests/cfg.rs

@@ -200,8 +200,8 @@ fn works_through_the_registry() {
 
     Package::new("foo", "0.1.0").publish();
     Package::new("bar", "0.1.0")
-            .target_dep("foo", "0.1.0", "'cfg(unix)'")
-            .target_dep("foo", "0.1.0", "'cfg(windows)'")
+            .target_dep("foo", "0.1.0", "cfg(unix)")
+            .target_dep("foo", "0.1.0", "cfg(windows)")
             .publish();
 
     let p = project("a")

tests/registry.rs

@@ -1,16 +1,22 @@
 #[macro_use]
 extern crate cargotest;
 extern crate hamcrest;
+extern crate url;
 
 use std::fs::{self, File};
 use std::io::prelude::*;
+use std::path::PathBuf;
 
 use cargotest::cargo_process;
 use cargotest::support::git;
 use cargotest::support::paths::{self, CargoPathExt};
 use cargotest::support::registry::{self, Package};
 use cargotest::support::{project, execs};
 use hamcrest::assert_that;
+use url::Url;
+
+fn registry_path() -> PathBuf { paths::root().join("registry") }
+fn registry() -> Url { Url::from_file_path(&*registry_path()).ok().unwrap() }
 
 #[test]
 fn simple() {
@@ -609,7 +615,9 @@ fn bad_license_file() {
         .file("src/main.rs", r#"
             fn main() {}
         "#);
-    assert_that(p.cargo_process("publish").arg("-v"),
+    assert_that(p.cargo_process("publish")
+                 .arg("-v")
+                 .arg("--host").arg(registry().to_string()),
                 execs().with_status(101)
                        .with_stderr_contains("\
 [ERROR] the license file `foo` does not exist"));
@@ -1340,3 +1348,37 @@ this warning.
 [FINISHED] [..]
 "));
 }
+
+#[test]
+fn toml_lies_but_index_is_truth() {
+    Package::new("foo", "0.2.0").publish();
+    Package::new("bar", "0.3.0")
+            .dep("foo", "0.2.0")
+			.file("Cargo.toml", r#"
+				[project]
+                name = "bar"
+                version = "0.3.0"
+                authors = []
+
+                [dependencies]
+                foo = "0.1.0"
+			"#)
+            .file("src/lib.rs", "extern crate foo;")
+			.publish();
+
+    let p = project("foo")
+        .file("Cargo.toml", r#"
+            [project]
+            name = "bar"
+            version = "0.5.0"
+            authors = []
+
+            [dependencies]
+            bar = "0.3"
+        "#)
+        .file("src/main.rs", "fn main() {}");
+    p.build();
+
+    assert_that(p.cargo("build").arg("-v"),
+                execs().with_status(0));
+}