Custom Composer installer for the ProcessWire CMS/CMF modules and site profiles.

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1.1.1 2022-06-02 13:01 UTC

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Last update: 2024-05-16 16:18:40 UTC


This project contains Composer custom installers for ProcessWire CMS/CMF modules and site profiles.

What does it do and why do we need it?

By default Composer installs all packages into the /vendor/ directory. This is great for things that support this type of structure, but not so great for projects – such as ProcessWire – that expect things to be in specific location: modules in /site/modules/module-name/, and site profiles generally as the /site/ directory itself, /site-profile-name/ when the system hasn't been installed yet, or before installat/site-subsite-name/ in the case of native multisite support.

ProcessWire Composer Installer currently makes two "corrections" to packages that define it as a dependency in their composer.json files:

  • modules are installed under ./site/modules/ModuleName/ (module name is read from composer.json and converted to PascalCase)
  • site profiles are installed under ./site-profile-name/ (site profile name is read from composer.json and the site- prefix is added automatically if needed)

Site-specific modules supports

One more thing to note is that modules can be installed either from the root directory of the ProcessWire installation, or from the /site/ directory itself. Installer will automatically determine which location you're currently in, and adjust paths accordingly.

This way we can install modules on a per-site basis (in the case of multisite), or include Composer based module dependencies with a site profile (which would otherwise require manual modifications to the ProcessWire root directory composer.json file, or at least running composer require in the root directory for said dependencies.)


There's a very similar project you might've heard of, called hari/pw-module. While this project and Hari's ProcessWire module installer are similar, there are a few key differences:

  • This project allows you to install both modules and site profiles
  • This project allows you to install modules from the /site/ directory
  • This project provides some additional features (and composer.json options) in terms of module and site profile naming, and also includes additional rules for auto-formatting module and site profile directory names


For developers installing modules or site profiles

  • To add a new module from Packagist, run composer require vendor-name/module-name in either ProcessWire root directory, or your /site/ directory.
  • To add a new site profile from Packagist, run composer require vendor-name/site-profile-name in the ProcessWire root directory.

Note that in order for this work, the module or site profile in question has to have wireframe-framework/processwire-composer-installer as a dependency. See next section for instructions for module or site profile authors.

Customizing installer paths

By default site profiles are installed under current working directory, and modules under site/modules/ (or modules/ in case you're already in a site directory). You can, though, override the default paths in the root composer.json of your project:

  "require": {
  "extra": {
    "pw-module-path": "site/modules",
    "pw-site-profile-path": "",

For module or site profile authors

The usage of this project is rather simple. You just need to a) add wireframe-framework/processwire-composer-installer as a dependency to your project by manually modifying the composer.json file or by running composer require wireframe-framework/processwire-composer-installer in your module or site profile root directory, and b) define the type of your package (via composer.json) as pw-module (for modules) or pw-site-profile (for site profiles).

Here's a stripped-down sample composer.json for a module:

    "name": "vendor-name/module-name",
    "type": "pw-module",
    "require": {
        "wireframe-framework/processwire-composer-installer": "^1.0.0"

And here's an equally stripped-down sample composer.json for a site profile:

    "name": "vendor-name/site-profile-name",
    "type": "pw-site-profile",
    "require": {
        "wireframe-framework/processwire-composer-installer": "^1.0.0"

In order for your modules to be easily installed, you should also add them to Packagist: https://packagist.org/.


  • PHP 5.5 or newer

Why does this project require other installers via composer.json?

In case you're wondering why we currently have hari/pw-module as a requirement for this package, there's actually a good reason for this, even though it is admittedly a bit of a hack:

  • Composer doesn't let us define package install order, but it prioritizes Composer installers.
  • If multiple installers compete for one package, the installer installed or loaded later wins.

By adding other installers (currently only hari/pw-module) as a dependency for this project we're actually effectively forcing Composer to install it before this project, which in turn allows us to override other installers when it comes to choosing an installer for pw-* packages.


This project is licensed under the Mozilla Public License Version 2.0.