bake: handle build checks from metadata

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

src/buildx/bake.ts

@@ -26,6 +26,7 @@ import {Util} from '../util';
 import {ExecOptions} from '@actions/exec';
 import {BakeDefinition} from '../types/buildx/bake';
 import {BuildMetadata} from '../types/buildx/build';
+import {VertexWarning} from '../types/buildkit/client';
 
 export interface BakeOpts {
   buildx?: Buildx;
@@ -86,6 +87,19 @@ export class Bake {
     return refs.length > 0 ? refs : undefined;
   }
 
+  public resolveWarnings(metadata?: BuildMetadata): Array<VertexWarning> | undefined {
+    if (!metadata) {
+      metadata = this.resolveMetadata();
+      if (!metadata) {
+        return undefined;
+      }
+    }
+    if ('buildx.build.warnings' in metadata) {
+      return metadata['buildx.build.warnings'] as Array<VertexWarning>;
+    }
+    return undefined;
+  }
+
   public async getDefinition(cmdOpts: BakeCmdOpts, execOptions?: ExecOptions): Promise<BakeDefinition> {
     execOptions = execOptions || {ignoreReturnCode: true};
     execOptions.ignoreReturnCode = true;