fix: Fix main module resolution in case pkg.main leads to broken path

Author: medikoo

get-resolver/index.js

@@ -22,7 +22,10 @@ module.exports = function (extensions, confirmFile, resolvePackageMain) {
 				var mainPath = join(path, result);
 				return resolveFile(mainPath).then(function (mainResult) {
 					if (mainResult) return mainResult;
-					return resolveFile(join(mainPath, "index"), 0);
+					return resolveFile(join(mainPath, "index"), 0).then(function (mainDirResult) {
+						if (mainDirResult) return mainDirResult;
+						return resolveFile(join(path, "index"), 0);
+					});
 				});
 			}
 			return resolveFile(join(path, "index"), 0);

test/__playground/node_modules/broken-main/index.js

@@ -164,6 +164,12 @@ module.exports = (t, a) =>
 		t(playgroundDir, "nested/elo").then(unexpected, error => {
 			a(isModuleNotFoundError(error, "nested/elo"), true);
 		}),
+		t(playgroundDir, "broken-main").then(value => {
+			a.deep(value, {
+				targetPath: resolve(`${ playgroundDir }/node_modules/broken-main/index.js`),
+				realPath: resolve(`${ playgroundDir }/node_modules/broken-main/index.js`)
+			});
+		}),
 		t(`${ playgroundDir }/node_modules/outer`, "outer3").then(value => {
 			a.deep(value, {
 				targetPath: resolve(`${ playgroundDir }/node_modules/outer3/index.js`),

test/__playground/node_modules/broken-main/package.json

@@ -121,6 +121,10 @@ module.exports = (t, a) => {
 		targetPath: resolve(`${ playgroundDir }/node_modules/pkg-main-dir/lib/index.js`),
 		realPath: resolve(`${ playgroundDir }/node_modules/pkg-main-dir/lib/index.js`)
 	});
+	a.deep(t(playgroundDir, "broken-main"), {
+		targetPath: resolve(`${ playgroundDir }/node_modules/broken-main/index.js`),
+		realPath: resolve(`${ playgroundDir }/node_modules/broken-main/index.js`)
+	});
 	try {
 		t(playgroundDir, "nested/elo");
 		throw new Error("Unexpected");