Update Verify

Contributors: danielbachhuber, dreamhost
Tags: wordpress updates
Requires at least: 4.4
Tested up to: 4.8
Stable tag: 0.0.0
License: MIT
License URI: https://opensource.org/licenses/MIT

Verifies the WordPress update process

Description

Verifies the WordPress update process by comparing heuristics about the WordPress installation before and after the update. Specifically, these include:

• HTTP status code (200 or otherwise).
• Whether or not a PHP fatal error is detected.
• Whether or not the closing </body> tag is detected.

Reporting mode

By default, Update Verify operates in a reporting mode; these heuristics are output alongside standard web or CLI update output.

$ wp core update --path=/path/to/wordpress
Updating to version 4.9.1 (en_US)...
Fetching pre-update site response...
 -> HTTP status code: 200
 -> Correctly detected closing </body> tag.
 -> No uncaught fatal error detected.
Unpacking the update...
Fetching post-update site response...
 -> HTTP status code: 200
 -> Correctly detected closing </body> tag.
 -> No uncaught fatal error detected.
Cleaning up files...
No files found that need cleaning up.
Success: WordPress updated successfully.

WP-CLI command

To use the heuristics to influence the update process, run the wp core safe-update WP-CLI update command instead.

Under the hood, this WP-CLI command aborts the update process if it detects WordPress to already be broken, and rolls back to the prior WordPress version if the update process caused detectable breakage.

For WordPress installations older than 3.7, wp core safe-update will first use wp core download to bring the installation up to WordPress 3.7, and then use WordPress' internal upgrade process for the remaining update.

Here's an example of what you might see running wp core safe-update:

###
# 500 status code observed while updating from WP 4.6 to 4.9, and causes rollback.
###
$ wp core safe-update --path=/path/to/wordpress
Currently running version 4.6
Updating to version 4.9.1 (en_US)...
Fetching pre-update site response...
 -> HTTP status code: 200
 -> Correctly detected closing </body> tag.
 -> No uncaught fatal error detected.
Unpacking the update...
Fetching post-update site response...
 -> HTTP status code: 500
 -> No closing </body> tag detected.
 -> No uncaught fatal error detected.
Rolling WordPress back to version 4.6...
Downloading WordPress 4.6 (en_US)...
154 files cleaned up.
Success: WordPress downloaded.
Error: Failed post-update status code check (HTTP code 500).

If the update process is successful, all output is written to STDOUT and the process returns exit code 0. If the update process fails in some way (pre- or post-updatE), the final error message is written to STDERR and the process returns exit code 1.

Installation

Update Verify can be installed as a WP-CLI package or as a WordPress plugin.

Installing as a WP-CLI package means Update Verify can be used globally on a server and will only execute during CLI-based updates:

wp package install danielbachhuber/update-verify

Installing as a plugin to means Update Verify can also be executed during web-based updates:

wp plugin install --activate https://github.com/danielbachhuber/update-verify

Both installation methods expose the wp core safe-update WP-CLI command, which requires WP-CLI 1.5.0-alpha-d71d228 or newer.

Changelog

0.1.1 (??? ??, 2018)

• Updated 'closing tag' detection message to clarify it's a success.

0.1.0 (??? ??, 2017)

• Initial release.