Add patch_files to Dependency

src/cargo/core/dependency.rs

@@ -34,6 +34,7 @@ struct Inner {
     specified_req: bool,
     kind: DepKind,
     only_match_name: bool,
+    patch_files: Vec<String>,
     explicit_name_in_toml: Option<InternedString>,
 
     optional: bool,
@@ -217,6 +218,7 @@ impl Dependency {
                 specified_req: false,
                 platform: None,
                 explicit_name_in_toml: None,
+                patch_files: vec![],
             }),
         }
     }
@@ -249,6 +251,10 @@ impl Dependency {
         self.explicit_name_in_toml().unwrap_or(self.inner.name)
     }
 
+    pub fn patch_files(&self) -> &Vec<String> {
+        &self.inner.patch_files
+    }
+
     /// The name of the package that this `Dependency` depends on.
     ///
     /// Usually this is what's written on the left hand side of a dependencies
@@ -329,6 +335,15 @@ impl Dependency {
         self
     }
 
+    /// Sets the list of patch files
+    pub fn set_patch_files(
+        &mut self,
+        patch_files: impl IntoIterator<Item = impl Into<String>>,
+    ) -> &mut Dependency {
+        Rc::make_mut(&mut self.inner).patch_files = patch_files.into_iter().map(|s| s.into()).collect();
+        self
+    }
+
     /// Sets the list of features requested for the package.
     pub fn set_features(
         &mut self,

src/cargo/util/toml/mod.rs

@@ -260,6 +260,7 @@ pub struct DetailedTomlDependency {
     default_features2: Option<bool>,
     package: Option<String>,
     public: Option<bool>,
+    patch_files: Option<Vec<String>>,
 }
 
 /// This type is used to deserialize `Cargo.toml` files.
@@ -1756,6 +1757,7 @@ impl DetailedTomlDependency {
             Some(id) => Dependency::parse(pkg_name, version, new_source_id, id, cx.config)?,
             None => Dependency::parse_no_deprecated(pkg_name, version, new_source_id)?,
         };
+        dep.set_patch_files(self.patch_files.iter().flatten());
         dep.set_features(self.features.iter().flatten())
             .set_default_features(
                 self.default_features