feat(manifest): add main entry

Author: ashleygwilliams

src/manifest.rs

@@ -32,6 +32,7 @@ struct NpmPackage {
     license: Option<String>,
     repository: Option<Repository>,
     files: Vec<String>,
+    main: String,
 }
 
 #[derive(Serialize)]
@@ -68,7 +69,8 @@ impl CargoManifest {
                 ty: "git".to_string(),
                 url: repo_url,
             }),
-            files: vec![js_file, wasm_file],
+            files: vec![js_file.clone(), wasm_file],
+            main: js_file,
         }
     }
 }

tests/manifest/main.rs

@@ -41,6 +41,7 @@ fn it_creates_a_package_json_default_path() {
         "https://github.com/ashleygwilliams/wasm-pack.git"
     );
     assert_eq!(pkg.files, ["wasm_pack.js", "wasm_pack_bg.wasm"]);
+    assert_eq!(pkg.main, "wasm_pack.js");
 }
 
 #[test]

tests/manifest/utils.rs

@@ -12,6 +12,7 @@ pub struct NpmPackage {
     pub license: String,
     pub repository: Repository,
     pub files: Vec<String>,
+    pub main: String,
 }
 
 #[derive(Deserialize)]