Magento 2 – Origin of the Update Folders

composermagento2web-setup-wizard

If I install Magento 2 via composer, I end up with a root level folder named update/

This contains the stand-alone updater application.

Where do the updater come from? I know Magento's composer installer copies a lot of stuff out of the 

vendor/magento/magento2-base

module, but the update application isn't in this this folder. In fact, none of the files in the update application appear anywhere in vendor folder. (or do they?)

Does anyone know where these files come from, and what puts them on your system when installing Magento via the composer.phar create-project method?

Best Answer

Full details are in this old article (self link), but here's the high level overview.

When you say

composer create-project --no-install --repository-url=https://repo.magento.com/ magento/project-community-edition my-magento2

you're telling Composer to download the magento/project-community-edition package and drop its contents directly in the my-magento2 folder. In addition to containing the composer.json file with all the Magento 2 packages listed, the magento/project-community-edition package includes the updated application in a top level update folder.

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