Only detect version for expected package manager (#94)

.github/workflows/main.yaml

@@ -7,18 +7,12 @@ on:
 jobs:
   everything:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [18]
     steps:
-      - uses: actions/checkout@v3
-      - uses: pnpm/action-setup@v2
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v3
+      - uses: actions/setup-node@v4
         with:
-          version: 8
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
-        with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 20
           cache: "pnpm"
       - name: Install dependencies
         run: pnpm install

src/lib/package-manager/helpers/infer-from-files.ts

@@ -1,6 +1,7 @@
 import fs from "fs-extra";
 import { execSync } from "node:child_process";
 import path from "node:path";
+import { getErrorMessage } from "~/lib/utils";
 import { getMajorVersion } from "~/lib/utils/get-major-version";
 import type { PackageManager, PackageManagerName } from "../names";
 import { getLockfileFileName, supportedPackageManagerNames } from "../names";
@@ -9,10 +10,16 @@ export function inferFromFiles(workspaceRoot: string): PackageManager {
   for (const name of supportedPackageManagerNames) {
     const lockfileName = getLockfileFileName(name);
 
-    const version = getVersion(name);
-
     if (fs.existsSync(path.join(workspaceRoot, lockfileName))) {
-      return { name, version, majorVersion: getMajorVersion(version) };
+      try {
+        const version = getVersion(name);
+
+        return { name, version, majorVersion: getMajorVersion(version) };
+      } catch (err) {
+        throw new Error(
+          `Failed to find package manager version for ${name}: ${getErrorMessage(err)}`
+        );
+      }
     }
   }