migrate APIIndexData from PHP codegen to json

Author: fredemmott

src/APIIndex.php

@@ -10,15 +10,27 @@
  */
 namespace HHVM\UserDocumentation;
 
-require(BuildPaths::APIDOCS_INDEX);
-
 use namespace Facebook\TypeAssert;
 use namespace HH\Lib\{C, Math, Str, Vec};
 
 final class APIIndex {
+  <<__Memoize>>
   public static function getIndex(
   ): APIIndexShape {
-    return APIIndexData::getIndex();
+    $key = __CLASS__.'!'.BuildPaths::BUILD_ID;
+
+    $success = false;
+    $data = apc_fetch($key, $success);
+    if ($success) {
+      return $data;
+    }
+
+    $data = JSON\decode_as_shape(
+      APIIndexShape::class,
+      \file_get_contents(BuildPaths::APIDOCS_INDEX_JSON),
+    );
+    apc_store($key, $data);
+    return $data;
   }
 
   public static function getIndexForType(

src/build/APIIndexBuildStep.php

@@ -12,8 +12,6 @@
 namespace HHVM\UserDocumentation;
 
 final class APIIndexBuildStep extends BuildStep {
-  use CodegenBuildStep;
-
   public function buildAll(): void {
     Log::i("\nAPIIndexBuild");
 
@@ -29,13 +27,12 @@ private function createIndex(
     Log::i("\nCreate Index");
 
     $index = $this->generateIndexData($list);
-    $code = $this->writeCode(
-      'APIIndexData.hhi',
-      $index,
-    );
     file_put_contents(
-      BuildPaths::APIDOCS_INDEX,
-      $code,
+      BuildPaths::APIDOCS_INDEX_JSON,
+      JSON\encode_shape(
+        APIIndexShape::class,
+        $index,
+      ),
     );
   }
 

src/build/BuildPaths.php

@@ -26,7 +26,7 @@
 
   const string APIDOCS_MARKDOWN = self::BUILD_DIR.'/api-markdown';
   const string APIDOCS_HTML = self::BUILD_DIR.'/api-html';
-  const string APIDOCS_INDEX = self::BUILD_DIR.'/api-index.php';
+  const string APIDOCS_INDEX_JSON = self::BUILD_DIR.'/api-index.json';
   const string APIDOCS_LEGACY_REDIRECTS
     = self::BUILD_DIR.'/api-legacy-redirects.php';