fix(dagre): Tell vite (or, actually, rollup) not to ignore try/catch.

Judging from vitejs/vite#5759, this should
fix the Chromatic issue we've been having with dagre, and if so, will
also fix a problem we *would* have had with a production build of our
own app once we tried to render React Flow trees.

packages/primer-components/.storybook/main.js

@@ -20,6 +20,22 @@ module.exports = {
       plugins: [...config.plugins, svgr(), tsconfigPaths()],
       // Don't write to node_modules, in case someday we can get it from Nix.
       cacheDir: "../.vite",
+
+      build: {
+        sourcemap: true,
+
+        rollupOptions: {
+          // XXX dhess: do we need to add Tailwind UI deps here?
+          external: ["react", "react-dom", "react-router-dom"],
+        },
+
+        // Workaround a dagre issue. See:
+        //
+        // https://github.com/vitejs/vite/issues/5759#issuecomment-1034461225
+        commonjsOptions: {
+          ignoreTryCatch: false,
+        }
+      },
     };
   },
 };

packages/primer-components/vite.config.ts

@@ -57,6 +57,13 @@ export default defineConfig({
       // XXX dhess: do we need to add Tailwind UI deps here?
       external: ["react", "react-dom", "react-router-dom"],
     },
+
+    // Workaround a dagre issue. See:
+    //
+    // https://github.com/vitejs/vite/issues/5759#issuecomment-1034461225
+    commonjsOptions: {
+      ignoreTryCatch: false,
+    }
   },
 
   define: {