}
            task dirProducer {
                outputs.dir 'build/outdir'
                doLast {
                    file('build/outdir').mkdirs()
                    file('build/outdir/file1.txt').text = 'some content'
                    file('build/outdir/sub').mkdirs()
                    file('build/outdir/sub/file2.txt').text = 'some content'
                }
            }

	}
	for i, m := range ms {
		mainModules.pathPrefix[m] = m.Path
		mainModules.modRoot[m] = rootDirs[i]
		mainModules.modFiles[m] = modFiles[i]
		mainModules.indices[m] = indices[i]

		if mainModules.modRoot[m] == modRootContainingCWD {
			mainModules.modContainingCWD = m
		}

		if rel := search.InDir(rootDirs[i], cfg.GOROOTsrc); rel != "" {
			mainModules.inGorootSrc[m] = true
			if m.Path == "std" {

			// test packages, and all the run actions for these
			// packages will depend on it. Motivating example:
			// supposed we have a top level directory with three
			// package subdirs, "a", "b", and "c", and
			// from the top level, a user runs "go test -coverpkg=./... ./...".
			// This will result in (roughly) the following action graph:
			//
			//	build("a")       build("b")         build("c")