Python jvm_platform.JvmPlatform类代码示例

 def _local_jvm_distribution(settings=None):
   settings_args = [settings] if settings else []
   try:
     local_distribution = JvmPlatform.preferred_jvm_distribution(settings_args, strict=True)
   except DistributionLocator.Error:
     local_distribution = JvmPlatform.preferred_jvm_distribution(settings_args, strict=False)
   return local_distribution

  def _get_zinc_arguments(settings):
    """Extracts and formats the zinc arguments given in the jvm platform settings.

    This is responsible for the symbol substitution which replaces $JAVA_HOME with the path to an
    appropriate jvm distribution.

    :param settings: The jvm platform settings from which to extract the arguments.
    :type settings: :class:`JvmPlatformSettings`
    """
    zinc_args = [
      '-C-source', '-C{}'.format(settings.source_level),
      '-C-target', '-C{}'.format(settings.target_level),
    ]
    if settings.args:
      settings_args = settings.args
      if any('$JAVA_HOME' in a for a in settings.args):
        try:
          distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=True)
        except DistributionLocator.Error:
          distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=False)
        logger.debug('Substituting "$JAVA_HOME" with "{}" in jvm-platform args.'
                     .format(distribution.home))
        settings_args = (a.replace('$JAVA_HOME', distribution.home) for a in settings.args)
      zinc_args.extend(settings_args)
    return zinc_args

  def compile(self, ctx, args, classpath, upstream_analysis,
              settings, fatal_warnings, zinc_file_manager,
              javac_plugin_map, scalac_plugin_map):
    try:
      distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=True)
    except DistributionLocator.Error:
      distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=False)

    javac_cmd = ['{}/bin/javac'.format(distribution.real_home)]

    javac_cmd.extend([
      '-classpath', ':'.join(classpath),
    ])

    if settings.args:
      settings_args = settings.args
      if any('$JAVA_HOME' in a for a in settings.args):
        logger.debug('Substituting "$JAVA_HOME" with "{}" in jvm-platform args.'
                     .format(distribution.home))
        settings_args = (a.replace('$JAVA_HOME', distribution.home) for a in settings.args)
      javac_cmd.extend(settings_args)

    javac_cmd.extend([
      '-d', ctx.classes_dir,
      # TODO: support -release
      '-source', str(settings.source_level),
      '-target', str(settings.target_level),
    ])

    javac_cmd.extend(self._javac_plugin_args(javac_plugin_map))

    javac_cmd.extend(args)

    if fatal_warnings:
      javac_cmd.extend(self.get_options().fatal_warnings_enabled_args)
    else:
      javac_cmd.extend(self.get_options().fatal_warnings_disabled_args)

    with argfile.safe_args(ctx.sources, self.get_options()) as batched_sources:
      javac_cmd.extend(batched_sources)

      with self.context.new_workunit(name='javac',
                                     cmd=' '.join(javac_cmd),
                                     labels=[WorkUnitLabel.COMPILER]) as workunit:
        self.context.log.debug('Executing {}'.format(' '.join(javac_cmd)))
        p = subprocess.Popen(javac_cmd, stdout=workunit.output('stdout'), stderr=workunit.output('stderr'))
        return_code = p.wait()
        workunit.set_outcome(WorkUnit.FAILURE if return_code else WorkUnit.SUCCESS)
        if return_code:
          raise TaskError('javac exited with return code {rc}'.format(rc=return_code))

  def platform(self):
    """Platform associated with this target.

    :return: The jvm platform object.
    :rtype: JvmPlatformSettings
    """
    return JvmPlatform.global_instance().get_platform_for_target(self)

  def execute(self):
    if JvmPlatform.global_instance().get_options().compiler != self.compiler_name:
      # If the requested compiler is not the one supported by this task,
      # bail early.
      return

    # In case we have no relevant targets and return early, create the requested product maps.
    self.create_empty_extra_products()

    relevant_targets = list(self.context.targets(predicate=self.select))

    if not relevant_targets:
      return

    # Clone the compile_classpath to the runtime_classpath.
    classpath_product = self.create_runtime_classpath()

    fingerprint_strategy = DependencyContext.global_instance().create_fingerprint_strategy(
        classpath_product)
    # Note, JVM targets are validated (`vts.update()`) as they succeed.  As a result,
    # we begin writing artifacts out to the cache immediately instead of waiting for
    # all targets to finish.
    with self.invalidated(relevant_targets,
                          invalidate_dependents=True,
                          fingerprint_strategy=fingerprint_strategy,
                          topological_order=True) as invalidation_check:

      compile_contexts = {vt.target: self.create_compile_context(vt.target, vt.results_dir)
                          for vt in invalidation_check.all_vts}

      self.do_compile(
        invalidation_check,
        compile_contexts,
        classpath_product,
      )

      if not self.get_options().use_classpath_jars:
        # Once compilation has completed, replace the classpath entry for each target with
        # its jar'd representation.
        for ccs in compile_contexts.values():
          cc = self.select_runtime_context(ccs)
          for conf in self._confs:
            classpath_product.remove_for_target(cc.target, [(conf, cc.classes_dir.path)])
            classpath_product.add_for_target(cc.target, [(conf, cc.jar_file.path)])

  def execute(self):
    if self.goal not in JvmPrepCommand.goals():
      raise  AssertionError('Got goal "{}". Expected goal to be one of {}'.format(
          self.goal, JvmPrepCommand.goals()))

    targets = self.context.targets(postorder=True,  predicate=self.runnable_prep_cmd)

    compile_classpath = self.context.products.get_data('compile_classpath')
    classpath_products = self.context.products.get_data('runtime_classpath', compile_classpath.copy)

    with self.context.new_workunit(name='jvm_prep_command', labels=[WorkUnitLabel.PREP]) as workunit:
      for target in targets:
        distribution = JvmPlatform.preferred_jvm_distribution([target.platform])
        executor = SubprocessExecutor(distribution)

        mainclass = target.payload.get_field_value('mainclass')
        args = target.payload.get_field_value('args', [])
        target_jvm_options = target.payload.get_field_value('jvm_options', [])
        cp = list(ClasspathUtil.classpath(target.closure(), classpath_products))
        if not cp:
          raise TaskError('target {} has no classpath. (Add dependencies= parameter?'
                          .format(target.address.spec))
        self.context.log.info('Running prep command for {}'.format(target.address.spec))
        returncode = distribution.execute_java(
          executor=executor,
          classpath=cp,
          main=mainclass,
          jvm_options=target_jvm_options,
          args=args,
          workunit_factory=self.context.new_workunit,
          workunit_name='run',
          workunit_labels=[WorkUnitLabel.PREP],
        )

        workunit.set_outcome(WorkUnit.FAILURE if returncode else WorkUnit.SUCCESS)
        if returncode:
          raise TaskError('RunJvmPrepCommand failed to run {}'.format(mainclass))

#.........这里部分代码省略.........
                """:type : set[pants.backend.python.python_requirement.PythonRequirement]"""
                info["requirements"] = [req.key for req in reqs]

            if isinstance(current_target, PythonTarget):
                interpreter_for_target = self.select_interpreter_for_targets([current_target])
                if interpreter_for_target is None:
                    raise TaskError("Unable to find suitable interpreter for {}".format(current_target.address))
                python_interpreter_targets_mapping[interpreter_for_target].append(current_target)
                info["python_interpreter"] = str(interpreter_for_target.identity)

            def iter_transitive_jars(jar_lib):
                """
        :type jar_lib: :class:`pants.backend.jvm.targets.jar_library.JarLibrary`
        :rtype: :class:`collections.Iterator` of
                :class:`pants.backend.jvm.jar_dependency_utils.M2Coordinate`
        """
                if classpath_products:
                    jar_products = classpath_products.get_artifact_classpath_entries_for_targets((jar_lib,))
                    for _, jar_entry in jar_products:
                        coordinate = jar_entry.coordinate
                        # We drop classifier and type_ since those fields are represented in the global
                        # libraries dict and here we just want the key into that dict (see `_jar_id`).
                        yield M2Coordinate(org=coordinate.org, name=coordinate.name, rev=coordinate.rev)

            target_libraries = OrderedSet()
            if isinstance(current_target, JarLibrary):
                target_libraries = OrderedSet(iter_transitive_jars(current_target))
            for dep in current_target.dependencies:
                info["targets"].append(dep.address.spec)
                if isinstance(dep, JarLibrary):
                    for jar in dep.jar_dependencies:
                        target_libraries.add(M2Coordinate(jar.org, jar.name, jar.rev))
                    # Add all the jars pulled in by this jar_library
                    target_libraries.update(iter_transitive_jars(dep))
                if isinstance(dep, Resources):
                    resource_target_map[dep] = current_target

            if isinstance(current_target, ScalaLibrary):
                for dep in current_target.java_sources:
                    info["targets"].append(dep.address.spec)
                    process_target(dep)

            if isinstance(current_target, JvmTarget):
                info["excludes"] = [self._exclude_id(exclude) for exclude in current_target.excludes]
                info["platform"] = current_target.platform.name

            info["roots"] = map(
                lambda (source_root, package_prefix): {"source_root": source_root, "package_prefix": package_prefix},
                self._source_roots_for_target(current_target),
            )

            if classpath_products:
                info["libraries"] = [self._jar_id(lib) for lib in target_libraries]
            targets_map[current_target.address.spec] = info

        for target in targets:
            process_target(target)

        jvm_platforms_map = {
            "default_platform": JvmPlatform.global_instance().default_platform.name,
            "platforms": {
                str(platform_name): {
                    "target_level": str(platform.target_level),
                    "source_level": str(platform.source_level),
                    "args": platform.args,
                }
                for platform_name, platform in JvmPlatform.global_instance().platforms_by_name.items()
            },
        }

        graph_info = {
            "version": self.DEFAULT_EXPORT_VERSION,
            "targets": targets_map,
            "jvm_platforms": jvm_platforms_map,
        }
        jvm_distributions = DistributionLocator.global_instance().all_jdk_paths()
        if jvm_distributions:
            graph_info["jvm_distributions"] = jvm_distributions

        if classpath_products:
            graph_info["libraries"] = self._resolve_jars_info(targets, classpath_products)

        if python_interpreter_targets_mapping:
            interpreters = self.interpreter_cache.select_interpreter(python_interpreter_targets_mapping.keys())
            default_interpreter = interpreters[0]

            interpreters_info = {}
            for interpreter, targets in six.iteritems(python_interpreter_targets_mapping):
                chroot = self.cached_chroot(interpreter=interpreter, pex_info=PexInfo.default(), targets=targets)
                interpreters_info[str(interpreter.identity)] = {"binary": interpreter.binary, "chroot": chroot.path()}

            graph_info["python_setup"] = {
                "default_interpreter": str(default_interpreter.identity),
                "interpreters": interpreters_info,
            }

        if self.format:
            return json.dumps(graph_info, indent=4, separators=(",", ": ")).splitlines()
        else:
            return [json.dumps(graph_info)]

 def get_preferred_distribution(platform, strict):
   try:
     return JvmPlatform.preferred_jvm_distribution([platform], strict=strict)
   except DistributionLocator.Error:
     return None

  def run_tests(self, fail_fast, test_targets, output_dir, coverage):
    test_registry = self._collect_test_targets(test_targets)
    if test_registry.empty:
      return TestResult.rc(0)

    coverage.instrument(output_dir)

    def parse_error_handler(parse_error):
      # Just log and move on since the result is only used to characterize failures, and raising
      # an error here would just distract from the underlying test failures.
      self.context.log.error('Error parsing test result file {path}: {cause}'
                             .format(path=parse_error.xml_path, cause=parse_error.cause))

    # The 'instrument_classpath' product below below will be `None` if not set, and we'll default
    # back to runtime_classpath
    classpath_product = self.context.products.get_data('instrument_classpath')

    result = 0
    for batch_id, (properties, batch) in enumerate(self._iter_batches(test_registry)):
      (workdir, platform, target_jvm_options, target_env_vars, concurrency, threads) = properties

      batch_output_dir = output_dir
      if self._batched:
        batch_output_dir = os.path.join(batch_output_dir, 'batch-{}'.format(batch_id))

      run_modifications = coverage.run_modifications(batch_output_dir)

      extra_jvm_options = run_modifications.extra_jvm_options

      # Batches of test classes will likely exist within the same targets: dedupe them.
      relevant_targets = {test_registry.get_owning_target(t) for t in batch}

      complete_classpath = OrderedSet()
      complete_classpath.update(run_modifications.classpath_prepend)
      complete_classpath.update(JUnit.global_instance().runner_classpath(self.context))
      complete_classpath.update(self.classpath(relevant_targets,
                                               classpath_product=classpath_product))

      distribution = JvmPlatform.preferred_jvm_distribution([platform], self._strict_jvm_version)

      # Override cmdline args with values from junit_test() target that specify concurrency:
      args = self._args(fail_fast, batch_output_dir) + [u'-xmlreport']

      if concurrency is not None:
        args = remove_arg(args, '-default-parallel')
        if concurrency == JUnitTests.CONCURRENCY_SERIAL:
          args = ensure_arg(args, '-default-concurrency', param='SERIAL')
        elif concurrency == JUnitTests.CONCURRENCY_PARALLEL_CLASSES:
          args = ensure_arg(args, '-default-concurrency', param='PARALLEL_CLASSES')
        elif concurrency == JUnitTests.CONCURRENCY_PARALLEL_METHODS:
          args = ensure_arg(args, '-default-concurrency', param='PARALLEL_METHODS')
        elif concurrency == JUnitTests.CONCURRENCY_PARALLEL_CLASSES_AND_METHODS:
          args = ensure_arg(args, '-default-concurrency', param='PARALLEL_CLASSES_AND_METHODS')

      if threads is not None:
        args = remove_arg(args, '-parallel-threads', has_param=True)
        args += ['-parallel-threads', str(threads)]

      batch_test_specs = [test.render_test_spec() for test in batch]
      with argfile.safe_args(batch_test_specs, self.get_options()) as batch_tests:
        with self._chroot(relevant_targets, workdir) as chroot:
          self.context.log.debug('CWD = {}'.format(chroot))
          self.context.log.debug('platform = {}'.format(platform))
          with environment_as(**dict(target_env_vars)):
            subprocess_result = self._spawn_and_wait(
              executor=SubprocessExecutor(distribution),
              distribution=distribution,
              classpath=complete_classpath,
              main=JUnit.RUNNER_MAIN,
              jvm_options=self.jvm_options + extra_jvm_options + list(target_jvm_options),
              args=args + batch_tests,
              workunit_factory=self.context.new_workunit,
              workunit_name='run',
              workunit_labels=[WorkUnitLabel.TEST],
              cwd=chroot,
              synthetic_jar_dir=batch_output_dir,
              create_synthetic_jar=self.synthetic_classpath,
            )
            self.context.log.debug('JUnit subprocess exited with result ({})'
                                   .format(subprocess_result))
            result += abs(subprocess_result)

        tests_info = self.parse_test_info(batch_output_dir, parse_error_handler, ['classname'])
        for test_name, test_info in tests_info.items():
          test_item = Test(test_info['classname'], test_name)
          test_target = test_registry.get_owning_target(test_item)
          self.report_all_info_for_single_test(self.options_scope, test_target,
                                               test_name, test_info)

        if result != 0 and fail_fast:
          break

    if result == 0:
      return TestResult.rc(0)

    target_to_failed_test = parse_failed_targets(test_registry, output_dir, parse_error_handler)

    def sort_owning_target(t):
      return t.address.spec if t else None

#.........这里部分代码省略.........

  def console_output(self, targets):
    targets_map = {}
    resource_target_map = {}
    ivy_info = None
    if self.get_options().libraries:
      ivy_jar_products = self.context.products.get_data('ivy_jar_products') or {}
      # This product is a list for historical reasons (exclusives groups) but in practice should
      # have either 0 or 1 entries.
      ivy_info_list = ivy_jar_products.get('default')
      if ivy_info_list:
        assert len(ivy_info_list) == 1, (
          'The values in ivy_jar_products should always be length 1,'
          ' since we no longer have exclusives groups.'
        )
        ivy_info = ivy_info_list[0]

    ivy_jar_memo = {}

    def process_target(current_target):
      """
      :type current_target:pants.base.target.Target
      """
      def get_target_type(target):
        if target.is_test:
          return Export.SourceRootTypes.TEST
        else:
          if (isinstance(target, Resources) and
              target in resource_target_map and
              resource_target_map[target].is_test):
            return Export.SourceRootTypes.TEST_RESOURCE
          elif isinstance(target, Resources):
            return Export.SourceRootTypes.RESOURCE
          else:
            return Export.SourceRootTypes.SOURCE

      def get_transitive_jars(jar_lib):
        """
        :type jar_lib: pants.backend.jvm.targets.jar_library.JarLibrary
        :rtype: twitter.common.collections.orderedset.OrderedSet
        """
        if not ivy_info or not self.get_options().libraries:
          return OrderedSet()
        transitive_jars = OrderedSet()
        for jar in jar_lib.jar_dependencies:
          transitive_jars.update(ivy_info.get_jars_for_ivy_module(jar, memo=ivy_jar_memo))
        return transitive_jars

      info = {
        'targets': [],
        'libraries': [],
        'roots': [],
        'target_type': get_target_type(current_target),
        'is_code_gen': current_target.is_codegen,
        'pants_target_type': self._get_pants_target_alias(type(current_target))

      }

      if not current_target.is_synthetic:
        info['globs'] = current_target.globs_relative_to_buildroot()
        if self.get_options().sources:
          info['sources'] = list(current_target.sources_relative_to_buildroot())

      target_libraries = OrderedSet()
      if isinstance(current_target, JarLibrary):
        target_libraries = get_transitive_jars(current_target)
      for dep in current_target.dependencies:
        info['targets'].append(dep.address.spec)
        if isinstance(dep, JarLibrary):
          for jar in dep.jar_dependencies:
            target_libraries.add(IvyModuleRef(jar.org, jar.name, jar.rev))
          # Add all the jars pulled in by this jar_library
          target_libraries.update(get_transitive_jars(dep))
        if isinstance(dep, Resources):
          resource_target_map[dep] = current_target

      if isinstance(current_target, ScalaLibrary):
        for dep in current_target.java_sources:
          info['targets'].append(dep.address.spec)
          process_target(dep)

      if isinstance(current_target, JvmTarget):
        info['excludes'] = [self._exclude_id(exclude) for exclude in current_target.excludes]
        info['platform'] = current_target.platform.name

      info['roots'] = map(lambda (source_root, package_prefix): {
        'source_root': source_root,
        'package_prefix': package_prefix
      }, self._source_roots_for_target(current_target))

      if self.get_options().libraries:
        info['libraries'] = [self._jar_id(lib) for lib in target_libraries]
      targets_map[current_target.address.spec] = info

    for target in targets:
      process_target(target)

    jvm_platforms_map = {
      'default_platform' : JvmPlatform.global_instance().default_platform.name,
      'platforms': {
        str(platform_name): {
#.........这里部分代码省略.........

  def compile(self, ctx, args, classpath, upstream_analysis,
              settings, fatal_warnings, zinc_file_manager,
              javac_plugin_map, scalac_plugin_map):
    try:
      distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=True)
    except DistributionLocator.Error:
      distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=False)

    javac_cmd = ['{}/bin/javac'.format(distribution.real_home)]

    javac_cmd.extend([
      '-classpath', ':'.join(classpath),
    ])

    if settings.args:
      settings_args = settings.args
      if any('$JAVA_HOME' in a for a in settings.args):
        logger.debug('Substituting "$JAVA_HOME" with "{}" in jvm-platform args.'
                     .format(distribution.home))
        settings_args = (a.replace('$JAVA_HOME', distribution.home) for a in settings.args)
      javac_cmd.extend(settings_args)

      javac_cmd.extend([
        # TODO: support -release
        '-source', str(settings.source_level),
        '-target', str(settings.target_level),
      ])

    if self.execution_strategy == self.HERMETIC:
      javac_cmd.extend([
        # We need to strip the source root from our output files. Outputting to a directory, and
        # capturing that directory, does the job.
        # Unfortunately, javac errors if the directory you pass to -d doesn't exist, and we don't
        # have a convenient way of making a directory in the output tree, so let's just use the
        # working directory as our output dir.
        # This also has the benefit of not needing to strip leading directories from the returned
        # snapshot.
        '-d', '.',
      ])
    else:
      javac_cmd.extend([
        '-d', ctx.classes_dir,
      ])

    javac_cmd.extend(self._javac_plugin_args(javac_plugin_map))

    javac_cmd.extend(args)

    if fatal_warnings:
      javac_cmd.extend(self.get_options().fatal_warnings_enabled_args)
    else:
      javac_cmd.extend(self.get_options().fatal_warnings_disabled_args)

    with argfile.safe_args(ctx.sources, self.get_options()) as batched_sources:
      javac_cmd.extend(batched_sources)

      if self.execution_strategy == self.HERMETIC:
        self._execute_hermetic_compile(javac_cmd, ctx)
      else:
        with self.context.new_workunit(name='javac',
                                       cmd=' '.join(javac_cmd),
                                       labels=[WorkUnitLabel.COMPILER]) as workunit:
          self.context.log.debug('Executing {}'.format(' '.join(javac_cmd)))
          p = subprocess.Popen(javac_cmd, stdout=workunit.output('stdout'), stderr=workunit.output('stderr'))
          return_code = p.wait()
          workunit.set_outcome(WorkUnit.FAILURE if return_code else WorkUnit.SUCCESS)
          if return_code:
            raise TaskError('javac exited with return code {rc}'.format(rc=return_code))

  def compile(self, ctx, args, dependency_classpath, upstream_analysis,
              settings, compiler_option_sets, zinc_file_manager,
              javac_plugin_map, scalac_plugin_map):
    classpath = (ctx.classes_dir.path,) + tuple(ce.path for ce in dependency_classpath)

    if self.get_options().capture_classpath:
      self._record_compile_classpath(classpath, ctx.target, ctx.classes_dir.path)

    try:
      distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=True)
    except DistributionLocator.Error:
      distribution = JvmPlatform.preferred_jvm_distribution([settings], strict=False)

    javac_args = []

    if settings.args:
      settings_args = settings.args
      if any('$JAVA_HOME' in a for a in settings.args):
        logger.debug('Substituting "$JAVA_HOME" with "{}" in jvm-platform args.'
                     .format(distribution.home))
        settings_args = (a.replace('$JAVA_HOME', distribution.home) for a in settings.args)
      javac_args.extend(settings_args)

      javac_args.extend([
        # TODO: support -release
        '-source', str(settings.source_level),
        '-target', str(settings.target_level),
      ])

    if self.execution_strategy == self.HERMETIC:
      javac_args.extend([
        # We need to strip the source root from our output files. Outputting to a directory, and
        # capturing that directory, does the job.
        # Unfortunately, javac errors if the directory you pass to -d doesn't exist, and we don't
        # have a convenient way of making a directory in the output tree, so let's just use the
        # working directory as our output dir.
        # This also has the benefit of not needing to strip leading directories from the returned
        # snapshot.
        '-d', '.',
      ])
    else:
      javac_args.extend([
        '-d', ctx.classes_dir.path,
      ])

    javac_args.extend(self._javac_plugin_args(javac_plugin_map))

    javac_args.extend(args)

    compiler_option_sets_args = self.get_merged_args_for_compiler_option_sets(compiler_option_sets)
    javac_args.extend(compiler_option_sets_args)

    javac_args.extend([
      '-classpath', ':'.join(classpath),
    ])
    javac_args.extend(ctx.sources)

    # From https://docs.oracle.com/javase/8/docs/technotes/tools/windows/javac.html#BHCJEIBB
    # Wildcards (*) aren’t allowed in these lists (such as for specifying *.java).
    # Use of the at sign (@) to recursively interpret files isn’t supported.
    # The -J options aren’t supported because they’re passed to the launcher,
    # which doesn’t support argument files.
    j_args = [j_arg for j_arg in javac_args if j_arg.startswith('-J')]
    safe_javac_args = list(filter(lambda x: x not in j_args, javac_args))

    with argfile.safe_args(safe_javac_args, self.get_options()) as batched_args:
      javac_cmd = ['{}/bin/javac'.format(distribution.real_home)]
      javac_cmd.extend(j_args)
      javac_cmd.extend(batched_args)

      if self.execution_strategy == self.HERMETIC:
        self._execute_hermetic_compile(javac_cmd, ctx)
      else:
        with self.context.new_workunit(name='javac',
                                       cmd=' '.join(javac_cmd),
                                       labels=[WorkUnitLabel.COMPILER]) as workunit:
          self.context.log.debug('Executing {}'.format(' '.join(javac_cmd)))
          p = subprocess.Popen(javac_cmd, stdout=workunit.output('stdout'), stderr=workunit.output('stderr'))
          return_code = p.wait()
          workunit.set_outcome(WorkUnit.FAILURE if return_code else WorkUnit.SUCCESS)
          if return_code:
            raise TaskError('javac exited with return code {rc}'.format(rc=return_code))

 def platform(self):
   return JvmPlatform.global_instance().get_platform_for_target(self)

 def test_platform(self):
   if self.payload.test_platform:
     return JvmPlatform.global_instance().get_platform_by_name(self.payload.test_platform)
   return self.platform

 def execute(self):
   if JvmPlatform.global_instance().get_options().compiler == 'javac':
     return super(JavacCompile, self).execute()