When using gradle with maven-publish, I get Cannot find wagon which supports the requested protocol: scp - maven

Question

The error I get - ""
The property uploadURL is defined as scp://user#host/data/apps/repo/m2
Here are the relevant sections
configurations {
deployerJars
}
// Apply the java plugin to add support for Java
apply plugin: 'java'
//----------------------
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'net.researchgate:gradle-release:2.0.2'
}
}
//----------------------
apply plugin: 'maven'
uploadArchives {
repositories {
mavenDeployer {
//uploadURL is defined in a properties file. It is properly recognied
//by gradle
repository(url:upLoadURL)
uniqueVersion = false
}
}
}
//----------------------
apply plugin: 'net.researchgate.release'
//----------------------
// In this section you declare where to find the dependencies of your project
repositories {
// Use 'maven central' for resolving your dependencies.
// You can declare any Maven/Ivy/file repository here.
mavenCentral()
}
// In this section you declare the dependencies for your production and test code
dependencies {
deployerJars "org.apache.maven.wagon:wagon-ssh:2.2"
compile 'org.springframework:spring-context:4.1.6.RELEASE'
compile 'org.springframework:spring-webmvc:4.1.6.RELEASE'
// Declare the dependency for your favourite test framework you want to use in your tests.
// TestNG is also supported by the Gradle Test task. Just change the
// testCompile dependency to testCompile 'org.testng:testng:6.8.1' and add
// 'test.useTestNG()' to your build script.
testCompile 'junit:junit:4.11'
}

Answer 1

You created a configuration called deployJars that is unnecessary.
You are missing the wagon dependency for the archives configuration:
dependencies {
archives "org.apache.maven.wagon:wagon-ssh-external:3.4.0"
}
So change deployJars to archives.
Then for uploadArchives, you need to specify the configuration:
uploadArchives {
repositories {
mavenDeployer {
configuration = configurations.archives // <-- missing
repository(url: "scpexe://yourhost/yourdir/")
uniqueVersion = false
}
}
}