Continue on bad database configuration from select scripts

Summary: Ref T11589. Provide a way for scripts to say "just continue if database config fails", and use it in `bin/config` and `bin/storage`.

Test Plan:
  - Broke database config.
  - Ran `bin/config`, worked fine.
  - Ran `bin/storage`, got helpful "set up the database" message.
  - Ran `bin/repository`, got fatal.
  - Ran normal site with valid/invalid config, got proper feedback.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T11589

Differential Revision: https://secure.phabricator.com/D16502

scripts/__init_script__.php

@@ -1,24 +1,3 @@
 <?php
 
-function init_phabricator_script() {
+require_once dirname(__FILE__).'/init/init-script.php';
-  error_reporting(E_ALL | E_STRICT);
-  ini_set('display_errors', 1);
-
-  $include_path = ini_get('include_path');
-  ini_set(
-    'include_path',
-    $include_path.PATH_SEPARATOR.dirname(__FILE__).'/../../');
-  @include_once 'libphutil/scripts/__init_script__.php';
-  if (!@constant('__LIBPHUTIL__')) {
-    echo "ERROR: Unable to load libphutil. Update your PHP 'include_path' to ".
-      "include the parent directory of libphutil/.\n";
-    exit(1);
-  }
-
-  phutil_load_library('arcanist/src');
-  phutil_load_library(dirname(__FILE__).'/../src/');
-
-  PhabricatorEnv::initializeScriptEnvironment();
-}
-
-init_phabricator_script();

scripts/init/init-script.php

@@ -0,0 +1,10 @@
+<?php
+
+// Initialize a standard script.
+
+require_once dirname(__FILE__).'/lib.php';
+
+init_phabricator_script(
+  array(
+    'config.optional' => false,
+  ));

scripts/init/init-setup.php

@@ -0,0 +1,12 @@
+<?php
+
+// Initialize a setup script which may run before database connections have
+// been configured. Scripts initialized in this way ignore database errors
+// while building database configuration and continue.
+
+require_once dirname(__FILE__).'/lib.php';
+
+init_phabricator_script(
+  array(
+    'config.optional' => true,
+  ));

scripts/init/lib.php

@@ -0,0 +1,23 @@
+<?php
+
+function init_phabricator_script(array $options) {
+  error_reporting(E_ALL | E_STRICT);
+  ini_set('display_errors', 1);
+
+  $include_path = ini_get('include_path');
+  ini_set(
+    'include_path',
+    $include_path.PATH_SEPARATOR.dirname(__FILE__).'/../../../');
+  @include_once 'libphutil/scripts/__init_script__.php';
+  if (!@constant('__LIBPHUTIL__')) {
+    echo "ERROR: Unable to load libphutil. Update your PHP 'include_path' to ".
+      "include the parent directory of libphutil/.\n";
+    exit(1);
+  }
+
+  phutil_load_library('arcanist/src');
+  phutil_load_library(dirname(__FILE__).'/../../src/');
+
+  $config_optional = $options['config.optional'];
+  PhabricatorEnv::initializeScriptEnvironment($config_optional);
+}

scripts/setup/manage_config.php

@@ -2,7 +2,7 @@
 <?php
 
 $root = dirname(dirname(dirname(__FILE__)));
-require_once $root.'/scripts/__init_script__.php';
+require_once $root.'/scripts/init/init-setup.php';
 
 $args = new PhutilArgumentParser($argv);
 $args->setTagline(pht('manage configuration'));

scripts/sql/manage_storage.php

@@ -2,7 +2,7 @@
 <?php
 
 $root = dirname(dirname(dirname(__FILE__)));
-require_once $root.'/scripts/__init_script__.php';
+require_once $root.'/scripts/init/init-setup.php';
 
 $args = new PhutilArgumentParser($argv);
 $args->setTagline(pht('manage Phabricator storage and schemata'));

src/infrastructure/env/PhabricatorEnv.php

@@ -68,11 +68,11 @@ final class PhabricatorEnv extends Phobject {
    * @phutil-external-symbol class PhabricatorStartup
    */
   public static function initializeWebEnvironment() {
-    self::initializeCommonEnvironment();
+    self::initializeCommonEnvironment(false);
   }
 
-  public static function initializeScriptEnvironment() {
+  public static function initializeScriptEnvironment($config_optional) {
-    self::initializeCommonEnvironment();
+    self::initializeCommonEnvironment($config_optional);
 
     // NOTE: This is dangerous in general, but we know we're in a script context
     // and are not vulnerable to CSRF.
@@ -88,11 +88,11 @@ final class PhabricatorEnv extends Phobject {
   }
 
 
-  private static function initializeCommonEnvironment() {
+  private static function initializeCommonEnvironment($config_optional) {
     PhutilErrorHandler::initialize();
 
     self::resetUmask();
-    self::buildConfigurationSourceStack();
+    self::buildConfigurationSourceStack($config_optional);
 
     // Force a valid timezone. If both PHP and Phabricator configuration are
     // invalid, use UTC.
@@ -174,7 +174,7 @@ final class PhabricatorEnv extends Phobject {
     }
   }
 
-  private static function buildConfigurationSourceStack() {
+  private static function buildConfigurationSourceStack($config_optional) {
     self::dropConfigCache();
 
     $stack = new PhabricatorConfigStackSource();
@@ -235,6 +235,14 @@ final class PhabricatorEnv extends Phobject {
       // If the database is not available, just skip this configuration
       // source. This happens during `bin/storage upgrade`, `bin/conf` before
       // schema setup, etc.
+    } catch (AphrontConnectionQueryException $ex) {
+      if (!$config_optional) {
+        throw $ex;
+      }
+    } catch (AphrontInvalidCredentialsQueryException $ex) {
+      if (!$config_optional) {
+        throw $ex;
+      }
     }
   }