fix extract method

__tests__/main.test.ts

@@ -1,6 +1,4 @@
-
-import { test } from '@jest/globals'
-
+import {test} from '@jest/globals'
 
 // shows how the runner will run a javascript action with env / stdout protocol
 test('test runs', () => {

src/main.ts

@@ -1,27 +1,31 @@
-import { getInput, exportVariable } from '@actions/core'
-import { readFileSync } from "node:fs";
+import {getInput, exportVariable} from '@actions/core'
+import {readFileSync} from 'node:fs'
 
 async function run(): Promise<void> {
+  const path = getInput('path')
 
-  const path = getInput('path');
-
-  const content = readFileSync(path, { encoding: 'utf8' });
-
+  const content = readFileSync(path, {encoding: 'utf8'})
 
   for (const line of content.split('\n')) {
-    if (line.trim() === '') continue;
+    if (line.trim() === '') continue
 
-    const [name, versionStatus] = line.split(' ');
+    const [name, versionStatus] = line.split(' ')
 
     if (name === 'flutter') {
-      const [version, channel] = versionStatus.split('-');
-      exportVariable('FLUTTER_VERSION', version)
-      exportVariable('FLUTTER_CHANNEL', channel)
-      break;
+      if (versionStatus.includes('-stable')) {
+        exportVariable('FLUTTER_VERSION', versionStatus.replace(/-stable$/, ''))
+        exportVariable('FLUTTER_CHANNEL', 'stable')
+        break
+      } else if (versionStatus.includes('.pre-beta')) {
+        exportVariable(
+          'FLUTTER_VERSION',
+          versionStatus.replace(/\.pre-beta$/, '')
+        )
+        exportVariable('FLUTTER_CHANNEL', 'beta')
+        break
+      }
     }
-
   }
-
 }
 
 run()