Added fail function

src/fail.ts

@@ -0,0 +1,26 @@
+import jobSummary from "./summary";
+import { rawString, trimIndent } from "./util";
+
+/**
+ * Set the markdown job/step summary and exit immediately.
+ * @param content The markdown job summary content.
+ */
+export function fail(content: string): never;
+
+/**
+ * Set the markdown job/step summary and exit immediately.
+ * @param template The markdown job summary template  content.
+ * @param args The arguments to fill into the template.
+ */
+export function fail(template: TemplateStringsArray, ...args: unknown[]): never;
+
+export function fail(
+	content: string | TemplateStringsArray,
+	...args: unknown[]
+): never {
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	const result = "❌ Error:" + trimIndent(content as any, ...(args || []));
+	jobSummary(result);
+	console.error(result);
+	process.exit(1);
+}

src/index.ts

@@ -10,5 +10,6 @@ export * from "./setFailed";
 export * from "./isDebug";
 export * from "./panic";
 export * from "./run";
+export * from "./fail";
 export * from "./reexports";
 export * as util from "./util";