module('org:module:1.0')
            }
        }

        and:
        outputContains "Build was configured to prefer settings repositories over project repositories but repository 'maven' was added by build file 'build.gradle'"
    }

    def "can fail the build if a project declares a repository"() {
        repository {
            'org:module:1.0'()
        }

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'

repositories {
<% if (repository) { %>
    maven {
        url rootProject.file("${repository.rootDir.name}").toURI().toURL()
    }
<% } %>
    mavenCentral()
}

<% if (binding.hasVariable("projectDependencies")) { %>
    configurations {
        compile.extendsFrom projectsConfiguration
    }
<% } %>

<% if (binding.hasVariable("springDmPluginVersion")) {%>

        then:
        fails 'publish'

        failure.assertHasDescription("Execution failed for task ':publishPubPublicationToMavenRepository'.")
        failure.assertHasCause("Failed to publish publication 'pub' to repository 'maven'")
        failure.assertHasCause("Could not write to resource '${module.artifact.uri}'.")
        failure.assertHasCause("403 Forbidden")
    }

    MavenGcsRepository getMavenGcsRepo() {

 -----

Maven Repository Metadata Model

 This is strictly the model for Maven Repository Metadata, so really just plain objects.

 The metadata file name is:

 * <<<maven-metadata.xml>>> in a remote repository,

 * <<<maven-metadata-\<repo-id>.xml>>> in a local repository, for metadata from a repository with <<<repo-id>>> identifier.

 []

        then:
        fails 'publish'

        failure.assertHasDescription("Execution failed for task ':publishPubPublicationToMavenRepository'.")
        failure.assertHasCause("Failed to publish publication 'pub' to repository 'maven'")
        failure.assertHasCause("Could not write to resource '${module.artifact.uri}'.")
        failure.assertHasCause("The AWS Access Key Id you provided does not exist in our records.")
    }

        then:
        failure.assertHasDescription "Execution failed for task ':publishMavenPublicationToMavenRepository'."
        failure.assertHasCause "Failed to publish publication 'maven' to repository 'maven'"
        failure.assertHasCause "Invalid publication 'maven': groupId cannot be empty"
    }

    def "fails with reasonable error message for invalid #invalidComponent name"() {

    }

    @ToBeFixedForConfigurationCache
    def "requesting MavenModule for a project component"() {
        MavenHttpModule module = publishModule()

        when:

        then:
        failure.assertHasDescription("Execution failed for task ':publishMavenPublicationToMavenRepository'.")
        failure.assertHasCause("Failed to publish publication 'maven' to repository 'maven'")
        failure.assertHasCause("Invalid publication 'maven': POM file is invalid. Check any modifications you have made to the POM file.")
    }

        then:
        failure.assertHasDescription("Execution failed for task ':publishMavenPublicationToMavenRepository'.")
        failure.assertHasCause("Failed to publish publication 'maven' to repository 'maven'")
        failure.assertHasCause("Could not PUT '${module.artifact.uri}'. Received status code 401 from server: Unauthorized")

        where:
        authScheme << [AuthScheme.BASIC, AuthScheme.DIGEST, AuthScheme.NTLM]

- Gradle Module Metadata is systematically published alongside the normal descriptor for a given repository (Maven or Ivy)
- the `pom.xml` or `ivy.xml` file will contain a _marker comment_ which tells Gradle that Gradle Module Metadata exists for this module