From 7eaa1cf70a71858a0278ff0dad2b61763a1a6c27 Mon Sep 17 00:00:00 2001
From: Eric Huss <eric@huss.org>
Date: Mon, 17 Dec 2018 20:35:50 -0800
Subject: [PATCH] Support alt-registry names in [patch] table.

---
 src/cargo/util/toml/mod.rs      |  8 +++++-
 tests/testsuite/alt_registry.rs | 44 +++++++++++++++++++++++++++++++++
 tests/testsuite/patch.rs        |  3 +++
 3 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/src/cargo/util/toml/mod.rs b/src/cargo/util/toml/mod.rs
index e32aabddd01..3c691d5a465 100644
--- a/src/cargo/util/toml/mod.rs
+++ b/src/cargo/util/toml/mod.rs
@@ -1205,7 +1205,13 @@ impl TomlManifest {
         for (url, deps) in self.patch.iter().flat_map(|x| x) {
             let url = match &url[..] {
                 CRATES_IO_REGISTRY => CRATES_IO_INDEX.parse().unwrap(),
-                _ => url.to_url()?,
+                _ => cx
+                    .config
+                    .get_registry_index(url)
+                    .or_else(|_| url.to_url())
+                    .chain_err(|| {
+                        format!("[patch] entry `{}` should be a URL or registry name", url)
+                    })?,
             };
             patch.insert(
                 url,
diff --git a/tests/testsuite/alt_registry.rs b/tests/testsuite/alt_registry.rs
index 83cdcab404c..4c734234ebc 100644
--- a/tests/testsuite/alt_registry.rs
+++ b/tests/testsuite/alt_registry.rs
@@ -514,3 +514,47 @@ fn passwords_in_url_forbidden() {
         .with_stderr_contains("error: Registry URLs may not contain passwords")
         .run();
 }
+
+#[test]
+fn patch_alt_reg() {
+    Package::new("bar", "0.1.0").publish();
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            cargo-features = ["alternative-registries"]
+
+            [package]
+            name = "foo"
+            version = "0.0.1"
+
+            [dependencies]
+            bar = { version = "0.1.0", registry = "alternative" }
+
+            [patch.alternative]
+            bar = { path = "bar" }
+        "#,
+        )
+        .file(
+            "src/lib.rs",
+            "
+            extern crate bar;
+            pub fn f() { bar::bar(); }
+            ",
+        )
+        .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.0"))
+        .file("bar/src/lib.rs", "pub fn bar() {}")
+        .build();
+
+    p.cargo("build")
+        .masquerade_as_nightly_cargo()
+        .with_stderr(
+            "\
+[UPDATING] `[ROOT][..]` index
+[COMPILING] bar v0.1.0 ([CWD]/bar)
+[COMPILING] foo v0.0.1 ([CWD])
+[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
+",
+        )
+        .run();
+}
diff --git a/tests/testsuite/patch.rs b/tests/testsuite/patch.rs
index dc101b85117..4d4498b1140 100644
--- a/tests/testsuite/patch.rs
+++ b/tests/testsuite/patch.rs
@@ -734,6 +734,9 @@ fn non_crates_io() {
             "\
 error: failed to parse manifest at `[..]`
 
+Caused by:
+  [patch] entry `some-other-source` should be a URL or registry name
+
 Caused by:
   invalid url `some-other-source`: relative URL without a base
 ",