Set repositories and version/revison dynamically in gradle - gradle

Question

I have a gradle buildscript. In this script I set some publications.
Later in the script I have a task which reads the Buildnumber from a file and increases it. Than the version of the project will be changed.
Now my question: Is it possible to change the revision/version after initialising the "Publishing"-PlugIn? If I doesn't set the new version, the "Publishing"-PlugIn will throw n error. If I change the version by editing the descriptor, the Plugin says, that it's not allowed to edit the descriptor directly.
I also want to change the repository-url, based on the build number.
Does anybody know a fix or had the same problem?
publishing {
publications {
ivy(IvyPublication) {
organisation project.group
module project.name
revision project.version
descriptor.status = 'milestone'
from components.java
artifact(sourceJar) {
type "source"
conf "runtime"
}
}
maven(MavenPublication) {
groupId project.group
artifactId project.name
version project.version
from components.java
}
}
repositories {
ivy {
// change to point to your repo, e.g. http://my.org/repo
url "P:/Java/Repo/ivy"
}
maven {
// change to point to your repo, e.g. http://my.org/repo
url "P:/Java/Repo/maven"
}
}
}
Here is my script for increasing the build number
def incVersion(project) {
project.versionInced = true
def versionPropsFile = file("${project.rootDir}/version.properties")
if (!versionPropsFile.canRead()) {
versionPropsFile.createNewFile();
}
def Properties versionProps = new Properties()
versionProps.load(new FileInputStream(versionPropsFile))
if(versionProps['build_version'] == null)
{
versionProps['build_version'] = 0;
}
def code = versionProps['build_version'].toInteger()+1;
versionProps['build_version']=code.toString()
versionProps.store(versionPropsFile.newWriter(), null)
project.projectInfos.version = project.version + "." + code.toString()
project.version = project.projectInfos.version
println "Version: "+project.version
return project.version
}

Answer 1

If I understood well, yes it can be done dynamically. You can pass a version while running gradle via project property (-P) or via system property (-D).
It will be:
gradle <some_task> -PsomeVersion=<version>
You need to alter the gradle script to read the property, so:
publishing {
publications {
ivy(IvyPublication) {
revision project.hasProperty('someVersion') ? project.someVersion : '<HERE YOU NEED TO PUT DEFAULT VERSION OR MAYBE THROW EXCEPTION IF EMPTY>'
//...
}
}
}
If you won't check if project has the property (using hasProperty method on project instance), MissingPropertyException will be thrown.