introduce weak dependencies: recommends, supplements, suggests, and e…

…nhances

README.md

@@ -91,6 +91,10 @@ from [the `Cargo.toml` file](https://doc.rust-lang.org/cargo/reference/manifest.
 * obsoletes: optional list of Obsoletes
 * conflicts: optional list of Conflicts
 * provides: optional list of Provides
+* recommends: optional list of Recommends
+* supplements: optional list of Supplements
+* suggests: optional list of Suggests
+* enhances: optional list of Enhances
 * vendor: optional string of Vendor
 
 Adding assets such as the binary file, ``.desktop`` file, or icons, shall be written in the following way.

src/config/mod.rs

@@ -319,6 +319,26 @@ impl Config {
                 builder = builder.provides(dependency);
             }
         }
+        if let Some(recommends) = metadata.get_table("recommends")? {
+            for dependency in Self::table_to_dependencies(recommends)? {
+                builder = builder.recommends(dependency);
+            }
+        }
+        if let Some(supplements) = metadata.get_table("supplements")? {
+            for dependency in Self::table_to_dependencies(supplements)? {
+                builder = builder.supplements(dependency);
+            }
+        }
+        if let Some(suggests) = metadata.get_table("suggests")? {
+            for dependency in Self::table_to_dependencies(suggests)? {
+                builder = builder.suggests(dependency);
+            }
+        }
+        if let Some(enhances) = metadata.get_table("enhances")? {
+            for dependency in Self::table_to_dependencies(enhances)? {
+                builder = builder.enhances(dependency);
+            }
+        }
 
         Ok(builder)
     }