Generate Diviner book for Javelin

Summary: And also fix a bug in the generator script.

Test Plan: Run `bin/diviner generate`, wait till the cows come home, see 3 pages about Javelin in the Diviner app.

Reviewers: O1 Blessed Committers, chris

Reviewed By: O1 Blessed Committers, chris

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Differential Revision: https://we.phorge.it/D25429

.gitignore

@@ -4,6 +4,7 @@
 # Diviner
 /docs/
 /.divinercache/
+/webroot/rsrc/externals/javelin/docs/.divinercache/
 /src/.cache/
 
 # libphutil

src/applications/diviner/workflow/DivinerGenerateWorkflow.php

@@ -348,7 +348,7 @@ final class DivinerGenerateWorkflow extends DivinerWorkflow {
       $atomizers[$atomizer][] = $file;
     }
 
-    $root = dirname(phutil_get_library_root('phabricator'));
+    $root = dirname(phutil_get_library_root('phorge'));
     $config_root = $this->getConfig('root');
 
     $bar = id(new PhutilConsoleProgressBar())
@@ -363,7 +363,6 @@ final class DivinerGenerateWorkflow extends DivinerWorkflow {
           $this->getBookConfigPath(),
           $class,
           $chunk);
-        $future->setCWD($config_root);
 
         $futures[] = $future;
 

webroot/rsrc/externals/javelin/docs/javelin.book

@@ -0,0 +1,16 @@
+{
+  "name" : "javelin",
+  "title" : "Javelin Documentation",
+  "short" : "Javelin Docs",
+  "preface" : "Documentation for developers using Javelin.",
+  "uri.source":
+    "https://we.phorge.it/diffusion/P/browse/master/%f$%l",
+  "rules": {
+    "(\\.diviner$)": "DivinerArticleAtomizer"
+  },
+  "groups": {
+    "concepts": {
+      "name": "Concepts"
+    }
+  }
+}