feat: enhance pnpm workspace support

Author: kuoruan

src/utils.ts

@@ -147,6 +147,10 @@ export function sortPaths(paths: string[]): string[] {
 }
 
 export function readYamlFile<T>(filePath: string): T | null {
+  if (!fs.existsSync(filePath)) {
+    return null;
+  }
+
   let doc: T | null;
   try {
     doc = yaml.load(fs.readFileSync(filePath, "utf8")) as T;
@@ -175,24 +179,22 @@ export function normalizePackageGlobOptions(
         : PNPM_WORKSPACE_FILENAME,
     );
 
-    if (fs.existsSync(pnpmWorkspacePath)) {
-      const pnpmWorkspace =
-        readYamlFile<Record<"packages", string[]>>(pnpmWorkspacePath);
+    const pnpmWorkspaceRes =
+      readYamlFile<Record<"packages", string[]>>(pnpmWorkspacePath);
 
-      if (pnpmWorkspace?.packages?.length) {
-        packagePatterns = pnpmWorkspace.packages;
-      }
+    if (pnpmWorkspaceRes?.packages?.length) {
+      packagePatterns = pnpmWorkspaceRes.packages;
     }
   }
 
-  if (patterns) {
+  if (patterns?.length) {
     packagePatterns = packagePatterns
-      ? [...packagePatterns, ...patterns]
+      ? unique([...packagePatterns, ...patterns])
       : patterns;
   }
 
   return {
-    patterns: packagePatterns ? unique(packagePatterns) : undefined,
+    patterns: packagePatterns?.length ? packagePatterns : undefined,
     ...restOptions,
   };
 }

tests/resolve/monorepo.spec.ts

@@ -18,6 +18,21 @@ describe("Test monorepo", () => {
     });
   });
 
+  it("pnpm monorepo", () => {
+    expect(
+      resolve("@lib/foo", getMonoRepoPath("main/index.js"), {
+        roots,
+        alias: { "@lib": "./lib" },
+        packages: {
+          pnpmWorkspace: true,
+        },
+      }),
+    ).deep.equal({
+      found: true,
+      path: getMonoRepoPath("main/lib/foo.js"),
+    });
+  });
+
   it("tsconfig", () => {
     expect(
       resolve("@/a", getMonoRepoPath("packages/ts/index.ts"), {