Gradle, gae, appengine-web.xml and web.xml not found - google-app-engine

Question

I have just started with gae plugin. The problem is that when I run gradle gaeRun I get the exception:
com.google.apphosting.utils.config.AppEngineConfigException: Could not locate ../myapp/build/exploded-war/WEB-INF/appengine-web.xml
So far I managed to get round the problem by adding the following in my gradle.build script:
gaeRun.doFirst{
copy {
from('war/WEB-INF/') {
include '**/*'
}
into 'build/exploded-war/WEB-INF/'
}
}
Is that the correct approach? Below is the whole script:
apply plugin: 'gae'
apply plugin: 'eclipse'
apply plugin: 'scala'
task wrapper(type: Wrapper) {
gradleVersion = '1.0'
}
buildscript {
repositories { mavenCentral() }
dependencies {
classpath 'org.gradle.api.plugins:gradle-gae-plugin:0.7.6'
}
}
repositories {
mavenCentral()
}
dependencies {
scalaTools 'org.scala-lang:scala-compiler:2.9.1'
scalaTools 'org.scala-lang:scala-library:2.9.1'
compile 'org.scala-lang:scala-library:2.9.1'
testCompile group: 'junit', name: 'junit', version: '4.8.2'
}
gae {
httpPort = 8085
optimizeWar = true
appcfg {
email = 'email#gmail.com'
passIn = true
logs {
severity = 1
outputFile = file('mylogs.txt')
}
app { id = 'sample-app' }
}
}
gaeRun.doFirst{
copy {
from('war/WEB-INF/') {
include '**/*'
}
into 'build/exploded-war/WEB-INF/'
}
}