Downgrade composer from 2.x to 1.x via brew

You just upgraded your brew packages and composer updated itself to version 2.x but you still need version 1.x? This is how you can downgrade (& upgrade again):

Show available versions of composer:

brew log composer

For me the latest 1.x version to date is: composer 1.10.15

Let's downgrade

composer self-update 1.10.15

To switch back to the 2.x version use

composer self-update --rollback

Comments

[Julien actouf]

Let's downgrade
composer self-update --1

  --1                        Force an update to the stable channel, but only use 1.x versions
  --2                        Force an update to the stable channel, but only use 2.x versions

[Michael Manreza]

This is very helpful. Thank you so much!