This helper can generate a pot for your WordPress themes and plugins. It makes use of the WordPress i18n helpers and the ubuntu gettext package.
The usage is very simple. In simple terms you have to bind a volume to the image and point the generator to it. You can either specify if it is a theme or a plugin or let the generic generator do its work. The destination file can be specified. However it will be derived from the specified name if you don't provide one.
docker run --rm -v /path/to/wp-theme:/var/www/html/wp-theme sebwas/wp-i18n wp-themeFor help text, run
docker run --rm sebwas/wp-i18n help