Put WordPress in maintenance mode without a plugin

1. In your web root directory (where the wp-config.php is located) create file .maintenance
2. It’s content should be <?php $upgrading = time();
3. You can customize the page by creating wp-content/maintenance.php

See sourceĀ https://github.com/WordPress/WordPress/blob/9041e7a07150b10ed28ec274374ce7d397b0ac9b/wp-includes/load.php#L203-L206

Get wp-content/uploads files from live site on localhost

While modifying clients WordPress sites I don’t download the uploads directory contents so to avoid 404s in Chrome’s Developer Tools console I modified .htaccess to redirect those URLs to the live site. Tested in a docker container.

How to create .pot file from source code

I just learned how to create a .pot from https://wordpress.stackexchange.com/a/169282/33599

Checkout WordPress development branch via SVN which has a script for creating .pot file.

cd /tmp
svn co http://develop.svn.wordpress.org/trunk wordpress-svn
php wordpress-svn/tools/i18n/makepot.php wp-plugin PATH_TO_PLUGIN PATH_TO_PLUGIN/language/PLUGIN_NAME.pot

makepot.php help

Usage: php makepot.php PROJECT DIRECTORY [OUTPUT]

Generate POT file from the files in DIRECTORY [OUTPUT]
Available projects: generic, wp-frontend, wp-admin, wp-network-admin, wp-tz, wp-plugin, wp-theme, glotpress, rosetta, wporg-bb-forums, wporg-themes, wporg-plugins, wporg-forums, wordcamporg