Use stylish formatting on CI

Author: orta

.github/workflows/ci.yml

@@ -33,6 +33,7 @@ jobs:
     - run:  npm install
     - run:  npm update
 
+    # Re: https://github.com/actions/setup-node/pull/125
     - name: Register Problem Matcher for TSC
       run: echo "##[add-matcher].github/tsc.json"
 

Gulpfile.js

@@ -354,7 +354,6 @@ const eslint = (folder) => async () => {
         "node_modules/eslint/bin/eslint",
         "--cache",
         "--cache-location", `${folder}/.eslintcache`,
-        "--format", "autolinkable-stylish",
         "--rulesdir", "scripts/eslint/built/rules",
         "--ext", ".ts",
     ];
@@ -363,6 +362,14 @@ const eslint = (folder) => async () => {
         args.push("--fix");
     }
 
+    // Use stylish format on CI, so that it can be picked up by GH Action's rule matchers
+    if (cmdLineOptions.ci) {
+        args.push("--format", "stylish");
+    }
+    else {
+        args.push("--format", "autolinkable-stylish");
+    }
+
     args.push(folder);
 
     log(`Linting: ${args.join(" ")}`);