On Wed, May 11, 2016 at 10:16 PM, James Montalvo jamesmontalvo3@gmail.com wrote:

I'm getting the following error when running `composer install` after cloning MW core and checking out 1.25.5. I've gotten the error on two separate systems:

1. Windows with PHP 5.4 and Composer version 1.2-dev
2. CentOS 7 with PHP 5.6 and Composer version 1.1.0

I did NOT get the error on the same Windows machine prior to running `composer self-update`. It had Composer version 1.0-dev (dbdd4978a7dd4cd29d0d7dfc912aab404245b736) prior to update.

*** Error message ***

Loading composer repositories with package information Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages.

Problem 1 - Installation request for wikimedia/composer-merge-plugin 1.0.0 -> satisfiable by wikimedia/composer-merge-plugin[v1.0.0]. - wikimedia/composer-merge-plugin v1.0.0 requires composer-plugin-api 1.0.0 -> no matching package found.

Potential causes:

• A typo in the package name
• The package is not available in a stable-enough version according to

your minimum-stability setting see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details.

Read https://getcomposer.org/doc/articles/troubleshooting.md for further common problems.

*** End error message ***

The quick fix is to edit your $IP/composer.json and change the `"wikimedia/composer-merge-plugin": "1.0.0",` line to read `"wikimedia/composer-merge-plugin": "1.3.1",`.

Before composer-merge-plugin v1.2.0 [0], we (incorrectly) required v1.0.0 of the Composer internal composer-plugin-api component. Composer recently bumped this internal version to v1.1.0 [1]. I'll prepare a patch for the REL1_25 branch to fix this for the next tarball release.

[0]: https://github.com/wikimedia/composer-merge-plugin/releases/tag/v1.2.0 [1]: https://github.com/composer/composer/commit/aeafe2fe59992efd1bc3f890b760f1a9...

Bryan