Set package manager versions

src/cache-save.ts

@@ -17,7 +17,7 @@ export async function run() {
     const cacheLock = core.getInput('cache');
     await cachePackages(cacheLock);
   } catch (error) {
-    core.setFailed(error.message);
+    core.setFailed((error as Error).message);
   }
 }
 

src/cache-utils.ts

@@ -47,17 +47,35 @@ export const getCommandOutput = async (toolCommand: string) => {
   return stdout.trim();
 };
 
+const resolvePackageManagerVersionInput = (
+  packageManager: string
+): string | undefined => {
+  let version = core.getInput(`${packageManager}-version`);
+
+  if (version !== '') {
+    core.info(`Using ${packageManager} with version ${version}.`);
+
+    return version;
+  }
+};
+
 const getPackageManagerVersion = async (
   packageManager: string,
   command: string
 ) => {
-  const stdOut = await getCommandOutput(`${packageManager} ${command}`);
+  let packageManagerVersion = resolvePackageManagerVersionInput(packageManager);
 
-  if (!stdOut) {
-    throw new Error(`Could not retrieve version of ${packageManager}`);
-  }
+  if (packageManagerVersion) {
+    return packageManagerVersion;
+  } else {
+    const stdOut = await getCommandOutput(`${packageManager} ${command}`);
 
-  return stdOut;
+    if (!stdOut) {
+      throw new Error(`Could not retrieve version of ${packageManager}`);
+    }
+
+    return stdOut;
+  }
 };
 
 export const getPackageManagerInfo = async (packageManager: string) => {

src/installer.ts

@@ -116,9 +116,9 @@ export async function getNode(
           `Received HTTP status code ${err.httpStatusCode}.  This usually indicates the rate limit has been exceeded`
         );
       } else {
-        core.info(err.message);
+        core.info((err as Error).message);
       }
-      core.debug(err.stack);
+      core.debug((err as Error).stack!);
       core.info('Falling back to download directly from Node');
     }
 
@@ -334,7 +334,7 @@ async function resolveVersionFromManifest(
     return info?.resolvedVersion;
   } catch (err) {
     core.info('Unable to resolve version from manifest...');
-    core.debug(err.message);
+    core.debug((err as Error).message);
   }
 }
 

src/main.ts

@@ -72,7 +72,7 @@ export async function run() {
       `##[add-matcher]${path.join(matchersPath, 'eslint-compact.json')}`
     );
   } catch (err) {
-    core.setFailed(err.message);
+    core.setFailed((err as Error).message);
   }
 }