Jonathan Desrosiers c83253c7f8 Upgrade/Install: Enable maintenance mode when plugins are auto-updated.
When an attempt is made to update an active plugin automatically, there is the potential currently for two negative scenarios:

- The plugin can be deactivated if the Plugins admin screen is loaded when the plugin update is incomplete, causing a PHP error.
- The WSOD protection could be triggered, sending a false alarm email to the site administrator.

By enabling maintenance mode before an active plugin update is attempted, these scenarios can be avoided.

This change implements the same approach as the `Theme_Upgrader` class of using the `upgrader_pre_install` and `upgrader_post_install` hooks to toggle maintenance mode.

Props desrosj, SergeyBiryukov.
Fixes #49400.

git-svn-id: https://develop.svn.wordpress.org/trunk@47275 602fd350-edb4-49c9-b593-d223f7449a82
2020-02-11 20:12:52 +00:00
2019-12-30 13:46:17 +00:00
2019-11-20 08:31:32 +00:00

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