How to copy output of binary task

Help/Discuss
#1

While working with the Native plugins, I’m searching for ways to copy the output of a native task, but can’t seem to get it working. It looks as if the native tasks are created too late.

Assume we have native (cpp) component ‘x’. There will be a lifecycle task ‘xStaticLibrary’. I would expect I can do this:

task zipX(type:Zip) {
  from project.tasks['xStaticLibrary']
  into '.'
}

Unfortunately this will not configure successful, claiming that task with name ‘xStaticLibrary’ cannot be found. Yet, when I execute ‘./gradlew components’, I do see the component and it’s corresponding tasks. How would I get this working?

UPDATE:
I similarly tried this, but it failed saying that the BinarySpec with name ‘:x’ cannot be found:

task zipX(type:Zip) {
  from project.binaries['x'].staticLibraryFile
  into '.'
}
#2

This is correct. In general, you have to get at these tasks through the binaries container. You could do something like this:

binaries.withType(StaticLibraryBinarySpec) {
    task "${name}Zip"(type: Zip) {
        from staticLibraryFile
        dependsOn tasks
    }
}
#3

Ah cool, that should work. In my case, I want to put multiple binaries in one zip, but then it’s look like this, right?

task 'zipAllNativeSOs'(type:Zip)
binaries.withType(StaticLibraryBinarySpec) {
    // Attach them all
    task 'zipAllNativeSOs' << {
        from staticLibraryFile
        dependsOn tasks
    }
}
#4

The left-shift operator (<<) is an alias to doLast which isn’t what you want. You’ll just want something like this:

task 'zipAllNativeSOs'(type:Zip) {
    binaries.withType(StaticLibraryBinarySpec) {
        // Attach them all
        from staticLibraryFile
        dependsOn tasks
    }
}
#5

Thanks @mark_vieira , this did indeed work, back when you posted it (on Gradle 2.6). However, when running the same code on 2.10, it fails during configuration:
Could not find property 'binaries' on task ':acllib:nativeZip'.

From release notes, I can’t figure out what I should change to get it back working. Mind help me out?

#6

Yes the syntax has changed in recent versions. You’ll have to do something like this:

model {
    tasks {
        zipAllNativeSOs(Zip) {
            $.binaries.withType(StaticLibraryBinarySpec).each {
                // Attach them all
                from it.staticLibraryFile
                dependsOn it.tasks
            }
        }
    }
}
#7

That results in a compilation error: Invalid variable name. Must include a letter but only found: $

#8

That sounds like either the code block is not inside a model { } block or you are not using Gradle 2.10.

#9

I am using Gradle 2.10 and it is in a model block, but it’s not the same model block as where I define the native components. Would that pose a problem?

#10

It should not. Can you share your build script? Perhaps there is something else going on.

#11

My build script is over 2100 lines long. I posted fragments of it on this Gist, but can’t show the entire file (as it’s IP of my employer). I’m afraid you won’t be able to run it…

#12

Try something like

model {
  task zipAllNativeSOs(type: Zip) {
    def staticLibraryBinaries = []
    binaries {
      withType(StaticLibraryBinarySpec) {
        dependsOn it.tasks
        staticLibraryBinaries << it
      }
    }
    doLast {
      staticLibraryBinaries.each { bin ->
        from bin.staticLibraryFile
      }
      into '.'
    }
  }
}

Maybe it can help.

Or if you just want to copy the output files, alternatively try

model {
  task copyAllNativeSOs {
    def staticLibraryBinaries = []
    binaries {
      withType(StaticLibraryBinarySpec) {
        dependsOn it.tasks
        staticLibraryBinaries << it
      }
    }
    doLast {
      staticLibraryBinaries.each { bin ->
        copy {
          from bin.staticLibraryFile
          into '.'
        }
      }
    }
  }
}
#13

It results in a compilation error with regards to the line that says binaries {:

Exception thrown while executing model rule: model.tasks > create(nativeZip)
Attempt to mutate closed view of model of type ‘java.lang.Object’ given to rule ‘model.tasks’

#14

Just double checked. The copyAllNativeSOs task works on my side with gradle 2.10.

I assume you call it in subprojects? That should work as well.

#15

Indeed, it’s called from subprojects, see the Gist linked above.

#16

Am I facing the same issue as How to "read" component model information in a Copy task??