www.aleph1.co.uk Git - yaffs-website/blob - vendor/psy/psysh/src/ExecutionLoop.php

   1 <?php
   2
   3 /*
   4  * This file is part of Psy Shell.
   5  *
   6  * (c) 2012-2018 Justin Hileman
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Psy;
  13
  14 use Psy\Exception\BreakException;
  15 use Psy\Exception\ErrorException;
  16 use Psy\Exception\ThrowUpException;
  17 use Psy\Exception\TypeErrorException;
  18
  19 /**
  20  * The Psy Shell execution loop.
  21  */
  22 class ExecutionLoop
  23 {
  24     /**
  25      * Run the execution loop.
  26      *
  27      * @throws ThrowUpException if thrown by the `throw-up` command
  28      *
  29      * @param Shell $shell
  30      */
  31     public function run(Shell $shell)
  32     {
  33         $this->loadIncludes($shell);
  34
  35         $closure = new ExecutionClosure($shell);
  36
  37         do {
  38             $shell->beforeLoop();
  39
  40             try {
  41                 $shell->getInput();
  42                 $_ = $closure->execute();
  43                 $shell->writeReturnValue($_);
  44             } catch (BreakException $_e) {
  45                 $shell->writeException($_e);
  46
  47                 return;
  48             } catch (ThrowUpException $_e) {
  49                 $shell->writeException($_e);
  50
  51                 throw $_e;
  52             } catch (\TypeError $_e) {
  53                 $shell->writeException(TypeErrorException::fromTypeError($_e));
  54             } catch (\Error $_e) {
  55                 $shell->writeException(ErrorException::fromError($_e));
  56             } catch (\Exception $_e) {
  57                 $shell->writeException($_e);
  58             }
  59
  60             $shell->afterLoop();
  61         } while (true);
  62     }
  63
  64     /**
  65      * Load user-defined includes.
  66      *
  67      * @param Shell $shell
  68      */
  69     protected function loadIncludes(Shell $shell)
  70     {
  71         // Load user-defined includes
  72         $load = function (Shell $__psysh__) {
  73             set_error_handler([$__psysh__, 'handleError']);
  74             foreach ($__psysh__->getIncludes() as $__psysh_include__) {
  75                 try {
  76                     include $__psysh_include__;
  77                 } catch (\Error $_e) {
  78                     $__psysh__->writeException(ErrorException::fromError($_e));
  79                 } catch (\Exception $_e) {
  80                     $__psysh__->writeException($_e);
  81                 }
  82             }
  83             restore_error_handler();
  84             unset($__psysh_include__);
  85
  86             // Override any new local variables with pre-defined scope variables
  87             extract($__psysh__->getScopeVariables(false));
  88
  89             // ... then add the whole mess of variables back.
  90             $__psysh__->setScopeVariables(get_defined_vars());
  91         };
  92
  93         $load($shell);
  94     }
  95 }