public Parameter(org.apache.maven.api.plugin.descriptor.Parameter p) {
        this.setAlias(p.getAlias());
        this.setName(p.getName());
        this.setRequired(p.isRequired());
        this.setEditable(p.isEditable());
        this.setDescription(p.getDescription());
        this.setExpression(p.getExpression());
        this.setDeprecated(p.getDeprecated());
        this.setDefaultValue(p.getDefaultValue());

            // we need the null check for pre-build legacy plugins...
            if (editableConfig != null) {
                String editable = d.getChild("editable").getValue();

                parameter.setEditable(editable == null || Boolean.parseBoolean(editable));
            }

            parameter.setDescription(extractDescription(d));

            parameter.setDeprecated(d.getChild("deprecated").getValue());

        makeWritable(true)
    }

    private void makeWritable(boolean writable) {
        roCacheDir.listFiles().each {
            it.eachFileRecurse {
                it.setWritable(writable)
            }
        }
    }

        // clean now takes care of those files as well
        testFiles.get().asFileTree.matching {
            include("**/read-only-cache/**")
        }.visit { this.file.setWritable(true) }
    }

        } catch (IOException original) {
            // Let's try again after making it writable, as this is needed on Windows in some cases
            if (file.setWritable(true)) {
                try {
                    return FileDeletionResult.withoutException(Files.deleteIfExists(file.toPath()));
                } catch (IOException ignored) {

    def "deletes read-only file"() {
        given:
        TestFile dir = tmpDir.getTestDirectory()
        TestFile file = dir.file("someFile").createFile()
        file.setWritable(false);

        when:
        boolean didWork = deleter.ensureEmptyDirectory(dir)

        then:
        dir.assertIsEmptyDir()
        didWork
    }

    @Requires(UnitTestPreconditions.Symlinks)