Improving startup times for before and after task dependencies

taskman.inc.php

@@ -48,6 +48,10 @@ class TaskmanTask
   private $is_running = false;
   private $has_run = array();
   private $args = array();
+  private $deps = null;
+  private $aliases = null;
+  private $before_deps = array();
+  private $after_deps = array();
 
   function __construct(\Closure $func, $name, $props = array())
   {
@@ -60,25 +64,6 @@ class TaskmanTask
     $this->props = $props;
   }
 
-  function validate()
-  {                       
-    try
-    {
-      foreach($this->_getBeforeDeps() as $dep_task)
-        get_task($dep_task);
-
-      foreach($this->_getDeps() as $dep_task)
-        get_task($dep_task);
-
-      foreach($this->_getAfterDeps() as $dep_task)
-        get_task($dep_task);
-    }
-    catch(Exception $e)
-    {
-      throw new Exception("Task '{$this->name}' validation error: " . $e->getMessage());
-    }
-  }
-
   function getName()
   {
     return $this->name;    
@@ -104,7 +89,14 @@ class TaskmanTask
     return $this->args;
   }
 
-  function getAliases()
+  function getAliases() : array
+  {
+    if($this->aliases === null)
+      $this->aliases = $this->_parseAliases();
+    return $this->aliases;
+  }
+
+  function _parseAliases() : array
   {
     $alias = $this->getPropOr("alias", "");
     if(is_array($alias))
@@ -143,8 +135,8 @@ class TaskmanTask
 
       if(!$TASKMAN_NO_DEPS)
       {
-        run_many($this->_getBeforeDeps());
+        run_many($this->before_deps);
-        run_many($this->_getDeps());
+        run_many($this->getDeps());
       }
 
       $TASKMAN_CURRENT_TASK = $this;
@@ -155,7 +147,7 @@ class TaskmanTask
       array_pop($TASKMAN_STACK);
 
       if(!$TASKMAN_NO_DEPS)
-        run_many($this->_getAfterDeps());
+        run_many($this->after_deps);
 
       msg_sys("***** ".str_repeat('-', $level)."task '" . $this->getName() . "' done(" . 
                      round(microtime(true)-$bench,2) . '/' .round(microtime(true)-$TASKMAN_START_TIME,2) . " sec.) *****\n");
@@ -175,34 +167,26 @@ class TaskmanTask
     return $task_result;
   }
 
-  private function _getBeforeDeps()
+  function addBeforeDep($task)
   {
-    return $this->_collectRelatedTasks("before");
+    $this->before_deps[] = $task;
   }
 
-  private function _getAfterDeps()
+  function addAfterDep($task)
   {
-    return $this->_collectRelatedTasks("after");
+    $this->after_deps[] = $task;
   }
 
-  private function _collectRelatedTasks($prop_name)
+  function getDeps() : array
   {
-    $arr = array();
+    if($this->deps === null)
-    foreach(get_tasks() as $task_obj)
+      $this->deps = $this->_parseDeps();
-    {
+    return $this->deps;
-      if($this->getName() == $task_obj->getName())
-        continue;
-
-      $value = $task_obj->getPropOr($prop_name, "");
-      if($value == $this->getName() || in_array($value, $this->getAliases()))
-        $arr[] = $task_obj;
-    }
-    return $arr;
   }
 
-  private function _getDeps()
+  private function _parseDeps() : array
   {
-    $deps = $this->getPropOr('deps', "");
+    $deps = $this->getPropOr("deps", "");
     if(is_array($deps))
       return $deps;
     else if($deps && is_string($deps))
@@ -280,7 +264,25 @@ function _collect_tasks()
   }
 
   foreach($TASKMAN_TASKS as $task)
-    $task->validate();
+  {
+    try
+    {
+      $before = $task->getPropOr("before", "");
+      if($before)
+        get_task($before)->addBeforeDep($task);
+
+      $after = $task->getPropOr("after", "");
+      if($after)
+        get_task($after)->addAfterDep($task);
+
+      foreach($task->getDeps() as $dep_task)
+        get_task($dep_task);
+    }
+    catch(Exception $e)
+    {
+      throw new Exception("Task '{$task->getName()}' validation error: " . $e->getMessage());
+    }
+  }
 }
 
 function _get_task_candidates()
@@ -302,7 +304,7 @@ function _get_task_candidates()
   return $cands;
 }
 
-function get_task($task)
+function get_task(string $task) : TaskmanTask
 {
   global $TASKMAN_TASKS;
   global $TASKMAN_TASK_ALIASES;
@@ -387,7 +389,7 @@ function task($name)
   $TASKMAN_CLOSURES[$name] = $args; 
 }
 
-function get_tasks()
+function get_tasks() : array
 {
   global $TASKMAN_TASKS;
   return $TASKMAN_TASKS;