Composer V2 doesn't add Vendor Files

[ghost]

Description

I am trying to install, via Composer, all the Vendor and Plugin files onto a new server. The server company will only allow a Composer V2 install, which, Craft CMS doesn't seem to account for. Are you going to update this anytime soon? Or how can I get around this issue?

Steps to reproduce

1. Download Composer v2
2. Delete Vendor files
3. Run Composer Install/Update and it stops at craftcms/plugin-installer v1.5.3 stating it needs Composer V1 not V2.

Additional info

• Craft version: 3.4.14
• PHP version: 7.3.16
• Database driver & version: MySQL v5.5
• Plugins & versions:

[ghost]

I get the following errors coming back...

• craftcms/plugin-installer 1.5.3 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match your constraint.
• craftcms/plugin-installer 1.5.4 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match your constraint.
• craftcms/cms 3.4.14 requires craftcms/plugin-installer ~1.5.3 -> satisfiable by craftcms/plugin-installer[1.5.4, 1.5.3].
• Root composer.json requires craftcms/cms 3.4.14 -> satisfiable by craftcms/cms[3.4.14].

[brandonkelly]

Composer 2 support has been drafted at PR #4. Going to wait until Composer 2 is officially released before merging/releasing though, in case something changes before then.

Installing Craft will also require yiisoft/yii2-composer to support Composer 2 as well, so that’s another holdup.

In the meantime if you really need Composer 2 support, you can add these to your composer.json:

{
  "minimum-stability": "dev",
  "require": {
    "yiisoft/yii2-composer": "dev-composer-2 as 2.0.8",
    "...": "..."
  },
  "repositories": [
    {"type": "vcs", "url": "https://github.com/brandonkelly/yii2-composer"}
  ]
}

[brandonkelly]

We’ve released craftcms/plugin-installer 1.5.5 with Composer 2 support, so you can safely remove the custom craftcms/plugin-installer: dev-composer2 requirement if you already added that.

Still waiting on yiisoft/yii2-composer though.

[brandonkelly]

yiisoft/yii2-composer 2.0.9 was released today, so that settles the Composer 2 compatibility issues. 🎉

It’s now safe to remove custom Composer requirements for those packages in composer.json, as well as that brandonkelly/yii2-composer custom repository.