Add hook directories (#5151)

* Add hook dir constants

* Add hook dir properties to configuration

* test hook dir properties

* reuse certbot.util.is_exe

* Add certbot.hooks.list_hooks

* test list_hooks

* Run pre-hooks in directory

* Run deploy-hooks in directory

* Run post-hooks in directory

* Refactor and update certbot/tests/hook_test.py

* Add integration tests for hook directories

* Have Certbot create hook directories.

* document renewal hook directories

* Add --no-directory-hooks

* Make minor note about locale independent sorting

certbot/configuration.py

@@ -108,6 +108,30 @@ class NamespaceConfig(object):
         return os.path.join(
             self.namespace.config_dir, constants.RENEWAL_CONFIGS_DIR)
 
+    @property
+    def renewal_hooks_dir(self):
+        """Path to directory with hooks to run with the renew subcommand."""
+        return os.path.join(self.namespace.config_dir,
+                            constants.RENEWAL_HOOKS_DIR)
+
+    @property
+    def renewal_pre_hooks_dir(self):
+        """Path to the pre-hook directory for the renew subcommand."""
+        return os.path.join(self.renewal_hooks_dir,
+                            constants.RENEWAL_PRE_HOOKS_DIR)
+
+    @property
+    def renewal_deploy_hooks_dir(self):
+        """Path to the deploy-hook directory for the renew subcommand."""
+        return os.path.join(self.renewal_hooks_dir,
+                            constants.RENEWAL_DEPLOY_HOOKS_DIR)
+
+    @property
+    def renewal_post_hooks_dir(self):
+        """Path to the post-hook directory for the renew subcommand."""
+        return os.path.join(self.renewal_hooks_dir,
+                            constants.RENEWAL_POST_HOOKS_DIR)
+
 
 def check_config_sanity(config):
     """Validate command line options and display error message if