refactor(toml): Be consistent in duplicate field access

Author: epage

src/cargo/util/toml/mod.rs

@@ -194,12 +194,7 @@ impl schema::TomlManifest {
         package_root: &Path,
     ) -> CargoResult<schema::TomlManifest> {
         let config = ws.config();
-        let mut package = self
-            .package
-            .as_ref()
-            .or_else(|| self.project.as_ref())
-            .unwrap()
-            .clone();
+        let mut package = self.package().unwrap().clone();
         package.workspace = None;
         let current_resolver = package
             .resolver

src/cargo/util/toml/schema.rs

@@ -2,6 +2,7 @@
 //!
 //! ## Style
 //!
+//! - Fields duplicated for an alias will have an accessor with the primary field's name
 //! - Keys that exist for bookkeeping but don't correspond to the schema have a `_` prefix
 
 use std::collections::BTreeMap;
@@ -51,6 +52,10 @@ impl TomlManifest {
         self.profile.is_some()
     }
 
+    pub fn package(&self) -> Option<&Box<TomlPackage>> {
+        self.package.as_ref().or(self.project.as_ref())
+    }
+
     pub fn dev_dependencies(&self) -> Option<&BTreeMap<String, MaybeWorkspaceDependency>> {
         self.dev_dependencies
             .as_ref()