Make ./bin/diviner generate more fault tolerant

Summary: Allow `./bin/diviner generate` to continue even if there is an exception throw processing an atom. This allows Diviner documentation to be generated for PHP source code that cannot be parsed with XHPAST.

Test Plan: Ran `./bin/diviner generate` on a PHP repository which previously throw an `XHPASTSyntaxErrorException`.

Reviewers: btrahan, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D10803

src/applications/diviner/workflow/DivinerGenerateWorkflow.php

@@ -334,6 +334,7 @@ final class DivinerGenerateWorkflow extends DivinerWorkflow {
     $bar = id(new PhutilConsoleProgressBar())
       ->setTotal(count($futures));
     foreach (Futures($futures)->limit(4) as $key => $future) {
+      try {
         $atoms = $future->resolveJSON();
 
         foreach ($atoms as $atom) {
@@ -343,6 +344,9 @@ final class DivinerGenerateWorkflow extends DivinerWorkflow {
           }
           $atom_cache->addAtom($atom);
         }
+      } catch (Exception $e) {
+        phlog($e);
+      }
 
       $bar->update(1);
     }