Manually substitute '+' version specifier in Gradle generated pom

upload-archives-workaround.gradle

uploadArchives {
    repositories {
        mavenDeployer {
            repository url: 'file:///tmp/testRepo'

            pom.whenConfigured { p ->
                // get all unresolved dependencies in our pom
                def unresolved = p.getDependencies()
                                  .grep { it.version == '+' }

                for (u in unresolved) {
                    def artifact =
                        "${u.groupId}:${u.artifactId}:${u.version}"

                    // crawl each configuration and try to find a resolution
                    // result for our unresolved artifact
                    def resolved
                    for ( c in project.configurations) {
                        def deps = c.incoming
                                    .getResolutionResult()
                                    .getAllDependencies()

                        // a matching resolution result will have a requested
                        // artifact name identical to our unresolved artifact
                        resolved =
                            deps.grep { "${it.getRequested()}" == artifact }
                                .getAt(0)

                        if (resolved) {
                            break
                        }
                    }

                    if (resolved) {
                        // now replace the unresolved version with the
                        // version selected by the resolution result
                        u.version = resolved.getSelected()
                                            .getModuleVersion()
                                            .getVersion()
                    }
                }
            }
        }
    }
}