Emoji, why not

src/main.ts

@@ -16,7 +16,7 @@ async function run() {
       process.chdir(inputs.workingDirectory);
     }
 
-    const hashes = await core.group("Calculate hashes", async () => {
+    const hashes = await core.group(":hash: Calculate hashes", async () => {
       const hashes = await hashProject(inputs.stackYaml);
       core.info(`Snapshot: ${hashes.snapshot}`);
       core.info(`Packages: ${hashes.package}`);
@@ -31,13 +31,13 @@ async function run() {
     );
 
     if (!inputs.noUpgradeStack) {
-      await core.group("Upgrade stack", async () => {
+      await core.group(":arrow_up: Upgrade stack", async () => {
         await stack.upgrade();
       });
     }
 
     const { stackYaml, stackRoot, stackWorks } = await core.group(
-      "Determine stack directories",
+      ":file_folder: Determine stack directories",
       async () => {
         // Only use --stack-root, which (as of stack v2.15) won't load the
         // environment and install GHC, etc. It's the only option currently safe
@@ -58,7 +58,7 @@ async function run() {
     // caching. Use the resolver itself instead.
     const cachePrefix = `${inputs.cachePrefix}${process.platform}/${stackYaml.resolver}`;
 
-    await core.group("Setup and install dependencies", async () => {
+    await core.group(":gear: Setup and install dependencies", async () => {
       await withCache(
         [stackRoot].concat(stackWorks),
         getCacheKeys([`${cachePrefix}/deps`, hashes.snapshot, hashes.package]),
@@ -73,7 +73,7 @@ async function run() {
       );
     });
 
-    await core.group("Build", async () => {
+    await core.group(":building_construction: Build", async () => {
       await withCache(
         stackWorks,
         getCacheKeys([
@@ -93,12 +93,12 @@ async function run() {
     });
 
     if (inputs.test) {
-      await core.group("Test", async () => {
+      await core.group(":detective: Test", async () => {
         await stack.buildTest(inputs.stackBuildArgumentsTest);
       });
     }
 
-    await core.group("Set outputs", async () => {
+    await core.group(":incoming_envelope: Set outputs", async () => {
       const stackQuery = await stack.query();
       const compiler = stackQuery.compiler.actual;
       const compilerVersion = compiler.replace(/^ghc-/, "");