Archive versions are not inferred from the classpaths

[guillermocalvo]

Currently, archive versions are never inferred from the classpaths:

I believe the problem is that JapicmpTask's properties oldClasspath and newClasspath are implicitly initialized as new DefaultConfigurableFileCollection objects.

  @CompileClasspath
  public abstract ConfigurableFileCollection getOldClasspath();

  @CompileClasspath
  public abstract ConfigurableFileCollection getNewClasspath();

Even if source paths are added to the classpaths via from(configuration), these properties never become an instance of Configuration and therefore, they are processed as simple FileCollection objects (ie. no version number is inferred).

configurations {
  baseline
  current
}

dependencies {
  baseline 'org.apache.commons:commons-lang3:3.5'
  current 'org.apache.commons:commons-lang3:3.6'
}

task japicmp(type: me.champeau.gradle.japicmp.JapicmpTask) {
  oldClasspath.from(configurations.baseline)
  newClasspath.from(configurations.current)
  xmlOutputFile = layout.buildDirectory.file('reports/japi.xml').get().asFile
}