Not easy to load recipes from deployer/contrib

[johnorourke]

Deployer's own contrib directory isn't in the default paths for RecipeLoader::loadRecipe().

Workaround: (eg. where deployer docs use require 'contrib/slack.php';, we would use the following)

\putenv('DEPLOY_RECIPE_PATHS=' . \Composer\InstalledVersions::getInstallPath('deployer/deployer') . '/contrib');
RecipeLoader::get()->loadRecipe('slack');

(PR coming!)

[poespas]

We implemented loading in contrib as follows in our SlackTask:

$this->recipeLoader->load('../contrib/slack.php');

Though I agree that's not super neat, thank you for submitting the issue.