x3p0-dev/x3p0-prelude

Composer package prefixer — copies vendor packages and applies namespace prefixing to avoid conflicts across multiple projects.

dev-master 2026-05-29 20:34 UTC

Requires

• php: >=8.1
• composer/composer: ^2.0

GPL-3.0-or-later

• Justin Tadlock

README

A Composer script that copies vendor packages into your project and rewrites their namespaces, preventing conflicts when the same package is used across multiple projects in the same WordPress installation.

Requirements

• PHP 8.1+
• Composer 2.0+

Installation

composer require-dev x3p0-dev/x3p0-prelude

Configuration

Add an x3p0.prelude block to the extra section of your composer.json, then register the script entry point:

{
	"scripts": {
		"post-install-cmd": [
			"@x3p0-prelude"
		],
		"post-update-cmd": [
			"@x3p0-prelude"
		],
		"x3p0-prelude": "X3P0\\Prelude\\Compose::run"
	},
	"extra": {
		"x3p0": {
			"prelude": {
				"prefix": "MyProject\\Vendor",
				"output-path": "packages",
				"packages": {
					"vendor/package-name": {
						"replace": "OriginalNamespace\\"
					}
				}
			}
		}
	}
}

Options

Key	Required	Description
prefix	Yes	The namespace prefix to apply to all copied packages.
output-path	Yes	Directory to copy packages into, relative to your project root.
packages	Yes	Map of packages to copy, keyed by vendor/package path.

Package options

Each entry under packages is keyed by the vendor/package path as it appears in your vendor/ directory. Glob-style wildcards are supported.

Key	Required	Description
replace	No	The original namespace root to rewrite. If omitted, files are copied without modification.

Wildcards

Use * within a package key to match multiple packages under a vendor:

"packages": {
	"some-vendor/*": {
		"replace": "SomeVendor\\"
	}
}

Use "*" alone to match all remaining packages in vendor/:

"packages": {
	"my-vendor/specific-package": {
		"replace": "SpecificNS\\"
	},
	"*": {}
}

How it works

When the script runs, it:

1. Clears the output directory.
2. Copies each configured package from vendor/ into the output directory.
3. Rewrites every occurrence of the original namespace root in copied PHP files, prepending your prefix.

For example, with prefix set to MyProject and replace set to X3P0\\, a copied file containing X3P0\Framework\Container becomes MyProject\Framework\Container.

Autoloading the output

Register the copied packages in your autoload block. The exact approach depends on the package structure; a classmap is the simplest option:

"autoload": {
	"classmap": ["packages/"]
}

Or use PSR-4 if the package has a known src/ layout:

"autoload": {
	"psr-4": {
		"MyProject\\Framework\\": "packages/vendor/package/src/"
	}
}

License

GPL-3.0-or-later.