Add metadata output

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/main.ts

@@ -1,5 +1,7 @@
+import * as fs from 'fs';
 import * as buildx from './buildx';
 import * as context from './context';
+import * as stateHelper from './state-helper';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 
@@ -14,6 +16,7 @@ async function run(): Promise<void> {
       core.setFailed(`Docker buildx is required. See https://github.com/docker/setup-buildx-action to set up buildx.`);
       return;
     }
+    stateHelper.setTmpDir(context.tmpDir());
 
     const bxVersion = await buildx.getVersion();
     const inputs: context.Inputs = await context.getInputs();
@@ -32,9 +35,29 @@ async function run(): Promise<void> {
           throw new Error(`buildx bake failed with: ${res.stderr.match(/(.*)\s*$/)![0].trim()}`);
         }
       });
+
+    await core.group(`Setting outputs`, async () => {
+      const metadata = await buildx.getMetadata();
+      if (metadata) {
+        core.info(`metadata=${metadata}`);
+        context.setOutput('metadata', metadata);
+      }
+    });
   } catch (error) {
     core.setFailed(error.message);
   }
 }
 
-run();
+async function cleanup(): Promise<void> {
+  if (stateHelper.tmpDir.length > 0) {
+    core.startGroup(`Removing temp folder ${stateHelper.tmpDir}`);
+    fs.rmdirSync(stateHelper.tmpDir, {recursive: true});
+    core.endGroup();
+  }
+}
+
+if (!stateHelper.IsPost) {
+  run();
+} else {
+  cleanup();
+}