Fix the error reporting on builds and reloading when there's an error.

admin/bando/Bandolier.svelte

@@ -103,13 +103,13 @@
 </bando>
 {:else if has_errors}
   <bando id="errors" transition:fade|local>
-    <a href="/admin/#/bando/devinfo/errors/">
+    <a href="/admin/#/errors/">
       <Icon name="alert-circle" light={ true } size="64" />
       <span>Errors</span>
     </a>
     <ul>
       {#each errors as error, i}
-        <li>{ error.filename }</li>
+        <li>{ error.location.file}</li>
       {/each}
     </ul>
   </bando>

commands/build.js

@@ -76,11 +76,11 @@ const syncContent = (watch_pattern) => ({
     });
 
     build.onEnd(async (result) => {
+      socket.emit("/reloader/notify", {});
+
       if(result.errors.length > 0) {
         console.error(`Build ended with ${result.errors.length} errors`);
       } else {
-        socket.emit("/reloader/notify", {});
-
         if(process.platform === "win32") {
           try {
           exec_i("robocopy static\\ public\\ /e /NFL /NDL /NJH /NJS /nc /ns /np");
@@ -101,8 +101,12 @@ const saveMetaFile = (build_meta, error_file) => ({
   name: "saveMetaFile",
   setup(build) {
     build.onEnd(async (result) => {
-      mkdir_to(build_meta);
-      await fs.writeFile(build_meta, JSON.stringify(result.metafile, null, 4));
+      // when there's an error esbuild doesn't include the metafile portion
+      if(result.metafile) {
+        mkdir_to(build_meta);
+        await fs.writeFile(build_meta, JSON.stringify(result.metafile, null, 4));
+      }
+
       mkdir_to(error_file);
       await fs.writeFile(error_file, JSON.stringify(result, null, 4));
     });