add a function to list pip package directories

dist/index.js

@@ -507,6 +507,25 @@ class PackageInfo {
         }
         return absFiles;
     }
+    directories() {
+        const dirs = [];
+        for (const file of this.files) {
+            const strs = file.split(path.sep);
+            if (strs.length < 1)
+                continue;
+            const dir = strs[0];
+            if (dir in dirs)
+                continue;
+            dirs.push(dir);
+        }
+        const absDirs = [];
+        for (const dir of dirs) {
+            const absDir = path.join(this.location, dir);
+            if (fs.existsSync(absDir))
+                absDirs.push(absDir);
+        }
+        return absDirs;
+    }
 }
 exports.PackageInfo = PackageInfo;
 async function showPackageInfo(packageName) {

src/deps/pip/info.test.ts

@@ -19,8 +19,10 @@ describe("pip module", () => {
     expect(pkgInfo.name).toBe("pip");
     expect(pkgInfo.version).toMatch(/^(\d+\.)?(\d+\.)?(\*|\d+)$/);
     expectPathExist(pkgInfo.location);
-    for (const file of pkgInfo.absoluteFiles()) {
-      expectPathExist(file);
+    const dirs = pkgInfo.directories();
+    expect(dirs.length).toBeGreaterThan(0);
+    for (const dir of dirs) {
+      expectPathExist(dir);
     }
   });
   test("show invalid package info return null", async () => {

src/deps/pip/info.ts

@@ -43,6 +43,23 @@ export class PackageInfo {
     }
     return absFiles;
   }
+
+  directories(): string[] {
+    const dirs: string[] = [];
+    for (const file of this.files) {
+      const strs = file.split(path.sep);
+      if (strs.length < 1) continue;
+      const dir = strs[0];
+      if (dir in dirs) continue;
+      dirs.push(dir);
+    }
+    const absDirs: string[] = [];
+    for (const dir of dirs) {
+      const absDir = path.join(this.location, dir);
+      if (fs.existsSync(absDir)) absDirs.push(absDir);
+    }
+    return absDirs;
+  }
 }
 
 export async function showPackageInfo(