DefaultManifest baseManifest = new DefaultManifest(Mock(FileResolver))
        baseManifest.attributes key1: 'value1', key2: 'value2'
        mergeSpec.from(new DefaultManifest(Mock(FileResolver)))
        mergeSpec.eachEntry {ManifestMergeDetails details ->
            if (details.getKey() == 'key2') {
                details.exclude()
            }
        }

        expect:

     * in the order added.
     *
     * @param mergeAction A merge action to be executed.
     * @return this
     */
    ManifestMergeSpec eachEntry(Action<? super ManifestMergeDetails> mergeAction);

    /**
     * Adds an action to be applied to each key-value tuple in a merge operation. If multiple merge paths are specified,

        return this;
    }

    @Override
    public ManifestMergeSpec eachEntry(Action<? super ManifestMergeDetails> mergeAction) {
        actions.add(mergeAction);
        return this;
    }

    @Override
    public ManifestMergeSpec eachEntry(Closure<?> mergeAction) {
        return eachEntry(ConfigureUtil.configureUsing(mergeAction));
    }

tasks.register('barJar', Jar) {
    manifest {
        attributes key1: 'value1'
        from sharedManifest, 'src/config/basemanifest.txt'
        from(['src/config/javabasemanifest.txt', 'src/config/libbasemanifest.txt']) {
            eachEntry { details ->
                if (details.baseValue != details.mergeValue) {
                    details.value = baseValue
                }
                if (details.key == 'foo') {
                    details.exclude()

    manifest {
        attributes("key1" to "value1")
        from(sharedManifest, "src/config/basemanifest.txt")
        from(listOf("src/config/javabasemanifest.txt", "src/config/libbasemanifest.txt")) {
            eachEntry(Action<ManifestMergeDetails> {
                if (baseValue != mergeValue) {
                    value = baseValue
                }
                if (key == "foo") {
                    exclude()
                }

    }

    def merge() {
        gradleManifest.attributes(key1: 'value1')
        gradleManifest.from(new DefaultManifest(fileResolver).attributes(key2: 'value2', key3: 'value3')) {
            eachEntry { details ->
                if (details.key == 'key3') {
                    details.exclude()
                }
            }
        }

Manifests are merged in the order they are declared in the `from` statement. If the base manifest and the merged manifest both define values for the same key, the merged manifest wins by default. You can fully customize the merge behavior by adding `eachEntry` actions in which you have access to a link:{javadocPath}/org/gradle/api/java/archives/ManifestMergeDetails.html[ManifestMergeDetails] instance for each entry of the resulting manifest. Note that the merge is done lazily, either when generating the...

Method <org.gradle.api.java.archives.ManifestMergeSpec.eachEntry(groovy.lang.Closure)> has arguments/return type groovy.lang.Closure that is not Gradle public API or primitive or built-in JDK classes or Kotlin classes in (ManifestMergeSpec.java:0)