Add support for .tool-versions file in setup-go, update workflow (#673)

* setup go in local

* add .tool-versions file support

src/cache-save.ts

@@ -15,6 +15,7 @@ process.on('uncaughtException', e => {
 // Added early exit to resolve issue with slow post action step:
 // - https://github.com/actions/setup-node/issues/878
 // https://github.com/actions/cache/pull/1217
+
 export async function run(earlyExit?: boolean) {
   try {
     const cacheInput = core.getBooleanInput('cache');

src/installer.ts

@@ -513,6 +513,9 @@ export function parseGoVersionFile(versionFilePath: string): string {
     // go directive: https://go.dev/ref/mod#go-mod-file-go
     const matchGo = contents.match(/^go (\d+(\.\d+)*)/m);
     return matchGo ? matchGo[1] : '';
+  } else if (path.basename(versionFilePath) === '.tool-versions') {
+    const match = contents.match(/^golang\s+([^\n#]+)/m);
+    return match ? match[1].trim() : '';
   }
 
   return contents.trim();