add storage.beforeRepoCreate Plugin Execution Points

[domruf]

There is already a storage.beforeCreate Plugin Execution Points that lets you implement plugins that react before artifacts are created in a repository. What we need is a plugin that reacts before a repository itself is created.

More concretely we want to restrict the names used for repositories. The idea would be something like this

import org.artifactory.exception.CancelException

storage {
    beforeRepoCreate { item ->
        def pattern = "(([^\\-]+)-)+(alpine|cargo|chef|cocoa|conan|conda|cran|debian|docker|gems|generic|gitlfs|go|helm|ivy|maven|npm|nuget|opkg|php|puppet|pypi|rpm|sbt|vagrant|bower)(-(prod|qa|dev))?-(local|remote)"
        def repoConf = repositories.getRepositoryConfiguration(item.repoPath.repoKey)
        if (!(item.repoPath.repoKey ==~ pattern)){
            def message = "Repo name: " + item.repoPath.repoKey + ". "
            message += "The repository name must end with -<type>-<remote|local> or -<type>-<prod|qa|dev>-<local|remote>"
            def status = 400
            throw new CancelException(message, status) {
                public Throwable fillInStackTrace() {
                    return null;
                }
            }
        }
    }
}