Webpack: convert git-loader to TypeScript

webpack/loaders/git-loader.ts

@@ -0,0 +1,14 @@
+import { resolve } from 'path';
+
+import { LoaderContext } from 'webpack';
+
+/**
+ * Forces recompile whenever the current commit changes.
+ * Useful for generating the version hash in the UI.
+ */
+function loader(this: LoaderContext<{}>, content: string) {
+  this.addDependency(resolve(__dirname, '../../.git/logs/HEAD'));
+  this.callback(undefined, content);
+}
+
+export default loader;

webpack/rules/git-refresh.ts

@@ -6,7 +6,7 @@ import type { RuleSetRule } from 'webpack';
 const rule: RuleSetRule = {
   test: resolve(__dirname, '../../app/soapbox/utils/code.js'),
   use: {
-    loader: resolve(__dirname, '../loaders/git-loader.js'),
+    loader: resolve(__dirname, '../loaders/git-loader.ts'),
   },
 };