Added cli_boot extension hook to run on each CLI request

docs/development/extension-hooks/extension-hooks-overview.md

@@ -20,6 +20,7 @@ TIP: Reference [Extending The Core](development/extensions.md) for more informat
 Core hooks are categorized into 5 categories:
 - Global
     - [Core Library](development/extension-hooks/global/core.md)
+    - [CLI](development/extension-hooks/global/cli.md)
     - [Email Library](development/extension-hooks/global/email.md)
     - [Filemanager Library](development/extension-hooks/global/filemanager.md)
     - [Functions Library](development/extension-hooks/global/functions.md)

docs/development/extension-hooks/global/cli.md

@@ -0,0 +1,48 @@
+---
+lang: php
+---
+
+<!--
+    This source file is part of the open source project
+    ExpressionEngine User Guide (https://github.com/ExpressionEngine/ExpressionEngine-User-Guide)
+
+    @link      https://expressionengine.com/
+    @copyright Copyright (c) 2003-2020, Packet Tide, LLC (https://packettide.com)
+    @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
+-->
+
+# CLI Extension Hooks
+
+### `cli_boot($cli)`
+
+| Parameter          | Type     | Description                                                              |
+| ------------------ | -------- | ------------------------------------------------------------------------ |
+| \$cli              | `Object` | Instance of CLI currently running                                        |
+| Returns            | `Void`   |                                                                          |
+
+Run tasks before every CLI request.
+
+How it's called:
+
+    $command = ee()->extensions->call('cli_boot', $this);
+    if (ee()->extensions->end_script === true) {
+        $this->complete('');
+    }
+
+### `cli_before_handle($cli, $commandClass, $command)`
+
+| Parameter      | Type     | Description                                                              |
+| -------------- | -------- | ------------------------------------------------------------------------ |
+| \$cli          | `Object` | Instance of CLI currently running                                        |
+| \$commandClass | `String` | Class name of command to be executed                                     |
+| \$command      | `Object` | Instance of command class to be executed                                 |
+| Returns        | `Object` | Modified instance of `$command`                                          |
+
+Run tasks right before CLI command is excuted. Allows modification of command class instance.
+
+How it's called:
+
+    $command = ee()->extensions->call('cli_before_handle', $this, $commandClass, $command);
+    if (ee()->extensions->end_script === true) {
+        $this->complete('');
+    }