nonzero exit code if some crates didn't install

src/cargo/ops/cargo_install.rs

@@ -63,10 +63,10 @@ pub fn install(root: Option<&str>,
     let root = resolve_root(root, opts.config)?;
     let map = SourceConfigMap::new(opts.config)?;
 
-    let installed_anything = if krates.len() <= 1 {
+    let (installed_anything, scheduled_error) = if krates.len() <= 1 {
         install_one(root.clone(), map, krates.into_iter().next(), source_id, vers, opts,
                     force, true)?;
-        true
+        (true, false)
     } else {
         let mut succeeded = vec![];
         let mut failed = vec![];
@@ -95,7 +95,7 @@ pub fn install(root: Option<&str>,
             opts.config.shell().status("\nSummary:", summary.join(" "))?;
         }
 
-        !succeeded.is_empty()
+        (!succeeded.is_empty(), !failed.is_empty())
     };
 
     if installed_anything {
@@ -114,6 +114,10 @@ pub fn install(root: Option<&str>,
                                            dst.display()))?;
     }
 
+    if scheduled_error {
+        bail!("some crates failed to install");
+    }
+
     Ok(())
 }
 

tests/install.rs

@@ -60,7 +60,7 @@ fn multiple_pkgs() {
     pkg("bar", "0.0.2");
 
     assert_that(cargo_process("install").args(&["foo", "bar", "baz"]),
-                execs().with_status(0).with_stderr(&format!("\
+                execs().with_status(101).with_stderr(&format!("\
 [UPDATING] registry `[..]`
 [DOWNLOADING] foo v0.0.1 (registry file://[..])
 [INSTALLING] foo v0.0.1
@@ -76,6 +76,7 @@ error: could not find `baz` in `registry [..]`
    
 Summary: Successfully installed foo, bar! Failed to install baz (see error(s) above).
 warning: be sure to add `[..]` to your PATH to be able to run the installed binaries
+error: some crates failed to install
 ",
         home = cargo_home().display())));
     assert_that(cargo_home(), has_installed_exe("foo"));