Add google-endpoints to third_party/.

third_party/google-endpoints/apitools/gen/command_registry.py

Index: third_party/google-endpoints/apitools/gen/command_registry.py
diff --git a/third_party/google-endpoints/apitools/gen/command_registry.py b/third_party/google-endpoints/apitools/gen/command_registry.py
new file mode 100644
index 0000000000000000000000000000000000000000..ad2aa0093f08d7e7f4edbfc27e0adb6e7a4a4e11
--- /dev/null
+++ b/third_party/google-endpoints/apitools/gen/command_registry.py
@@ -0,0 +1,603 @@
+#!/usr/bin/env python
+#
+# Copyright 2015 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Command registry for apitools."""
+
+import logging
+import textwrap
+
+from apitools.base.protorpclite import descriptor
+from apitools.base.protorpclite import messages
+from apitools.gen import extended_descriptor
+
+# This is a code generator; we're purposely verbose.
+# pylint:disable=too-many-statements
+
+_VARIANT_TO_FLAG_TYPE_MAP = {
+    messages.Variant.DOUBLE: 'float',
+    messages.Variant.FLOAT: 'float',
+    messages.Variant.INT64: 'string',
+    messages.Variant.UINT64: 'string',
+    messages.Variant.INT32: 'integer',
+    messages.Variant.BOOL: 'boolean',
+    messages.Variant.STRING: 'string',
+    messages.Variant.MESSAGE: 'string',
+    messages.Variant.BYTES: 'string',
+    messages.Variant.UINT32: 'integer',
+    messages.Variant.ENUM: 'enum',
+    messages.Variant.SINT32: 'integer',
+    messages.Variant.SINT64: 'integer',
+}
+
+
+class FlagInfo(messages.Message):
+
+    """Information about a flag and conversion to a message.
+
+    Fields:
+      name: name of this flag.
+      type: type of the flag.
+      description: description of the flag.
+      default: default value for this flag.
+      enum_values: if this flag is an enum, the list of possible
+          values.
+      required: whether or not this flag is required.
+      fv: name of the flag_values object where this flag should
+          be registered.
+      conversion: template for type conversion.
+      special: (boolean, default: False) If True, this flag doesn't
+          correspond to an attribute on the request.
+    """
+    name = messages.StringField(1)
+    type = messages.StringField(2)
+    description = messages.StringField(3)
+    default = messages.StringField(4)
+    enum_values = messages.StringField(5, repeated=True)
+    required = messages.BooleanField(6, default=False)
+    fv = messages.StringField(7)
+    conversion = messages.StringField(8)
+    special = messages.BooleanField(9, default=False)
+
+
+class ArgInfo(messages.Message):
+
+    """Information about a single positional command argument.
+
+    Fields:
+      name: argument name.
+      description: description of this argument.
+      conversion: template for type conversion.
+    """
+    name = messages.StringField(1)
+    description = messages.StringField(2)
+    conversion = messages.StringField(3)
+
+
+class CommandInfo(messages.Message):
+
+    """Information about a single command.
+
+    Fields:
+      name: name of this command.
+      class_name: name of the apitools_base.NewCmd class for this command.
+      description: description of this command.
+      flags: list of FlagInfo messages for the command-specific flags.
+      args: list of ArgInfo messages for the positional args.
+      request_type: name of the request type for this command.
+      client_method_path: path from the client object to the method
+          this command is wrapping.
+    """
+    name = messages.StringField(1)
+    class_name = messages.StringField(2)
+    description = messages.StringField(3)
+    flags = messages.MessageField(FlagInfo, 4, repeated=True)
+    args = messages.MessageField(ArgInfo, 5, repeated=True)
+    request_type = messages.StringField(6)
+    client_method_path = messages.StringField(7)
+    has_upload = messages.BooleanField(8, default=False)
+    has_download = messages.BooleanField(9, default=False)
+
+
+class CommandRegistry(object):
+
+    """Registry for CLI commands."""
+
+    def __init__(self, package, version, client_info, message_registry,
+                 root_package, base_files_package, protorpc_package,
+                 base_url, names):
+        self.__package = package
+        self.__version = version
+        self.__client_info = client_info
+        self.__names = names
+        self.__message_registry = message_registry
+        self.__root_package = root_package
+        self.__base_files_package = base_files_package
+        self.__protorpc_package = protorpc_package
+        self.__base_url = base_url
+        self.__command_list = []
+        self.__global_flags = []
+
+    def Validate(self):
+        self.__message_registry.Validate()
+
+    def AddGlobalParameters(self, schema):
+        for field in schema.fields:
+            self.__global_flags.append(self.__FlagInfoFromField(field, schema))
+
+    def AddCommandForMethod(self, service_name, method_name, method_info,
+                            request, _):
+        """Add the given method as a command."""
+        command_name = self.__GetCommandName(method_info.method_id)
+        calling_path = '%s.%s' % (service_name, method_name)
+        request_type = self.__message_registry.LookupDescriptor(request)
+        description = method_info.description
+        if not description:
+            description = 'Call the %s method.' % method_info.method_id
+        field_map = dict((f.name, f) for f in request_type.fields)
+        args = []
+        arg_names = []
+        for field_name in method_info.ordered_params:
+            extended_field = field_map[field_name]
+            name = extended_field.name
+            args.append(ArgInfo(
+                name=name,
+                description=extended_field.description,
+                conversion=self.__GetConversion(extended_field, request_type),
+            ))
+            arg_names.append(name)
+        flags = []
+        for extended_field in sorted(request_type.fields,
+                                     key=lambda x: x.name):
+            field = extended_field.field_descriptor
+            if extended_field.name in arg_names:
+                continue
+            if self.__FieldIsRequired(field):
+                logging.warning(
+                    'Required field %s not in ordered_params for command %s',
+                    extended_field.name, command_name)
+            flags.append(self.__FlagInfoFromField(
+                extended_field, request_type, fv='fv'))
+        if method_info.upload_config:
+            # TODO(craigcitro): Consider adding additional flags to allow
+            # determining the filename from the object metadata.
+            upload_flag_info = FlagInfo(
+                name='upload_filename', type='string', default='',
+                description='Filename to use for upload.', fv='fv',
+                special=True)
+            flags.append(upload_flag_info)
+            mime_description = (
+                'MIME type to use for the upload. Only needed if '
+                'the extension on --upload_filename does not determine '
+                'the correct (or any) MIME type.')
+            mime_type_flag_info = FlagInfo(
+                name='upload_mime_type', type='string', default='',
+                description=mime_description, fv='fv', special=True)
+            flags.append(mime_type_flag_info)
+        if method_info.supports_download:
+            download_flag_info = FlagInfo(
+                name='download_filename', type='string', default='',
+                description='Filename to use for download.', fv='fv',
+                special=True)
+            flags.append(download_flag_info)
+            overwrite_description = (
+                'If True, overwrite the existing file when downloading.')
+            overwrite_flag_info = FlagInfo(
+                name='overwrite', type='boolean', default='False',
+                description=overwrite_description, fv='fv', special=True)
+            flags.append(overwrite_flag_info)
+        command_info = CommandInfo(
+            name=command_name,
+            class_name=self.__names.ClassName(command_name),
+            description=description,
+            flags=flags,
+            args=args,
+            request_type=request_type.full_name,
+            client_method_path=calling_path,
+            has_upload=bool(method_info.upload_config),
+            has_download=bool(method_info.supports_download)
+        )
+        self.__command_list.append(command_info)
+
+    def __LookupMessage(self, message, field):
+        message_type = self.__message_registry.LookupDescriptor(
+            '%s.%s' % (message.name, field.type_name))
+        if message_type is None:
+            message_type = self.__message_registry.LookupDescriptor(
+                field.type_name)
+        return message_type
+
+    def __GetCommandName(self, method_id):
+        command_name = method_id
+        prefix = '%s.' % self.__package
+        if command_name.startswith(prefix):
+            command_name = command_name[len(prefix):]
+        command_name = command_name.replace('.', '_')
+        return command_name
+
+    def __GetConversion(self, extended_field, extended_message):
+        field = extended_field.field_descriptor
+
+        type_name = ''
+        if field.variant in (messages.Variant.MESSAGE, messages.Variant.ENUM):
+            if field.type_name.startswith('apitools.base.protorpclite.'):
+                type_name = field.type_name
+            else:
+                field_message = self.__LookupMessage(extended_message, field)
+                if field_message is None:
+                    raise ValueError(
+                        'Could not find type for field %s' % field.name)
+                type_name = 'messages.%s' % field_message.full_name
+
+        template = ''
+        if field.variant in (messages.Variant.INT64, messages.Variant.UINT64):
+            template = 'int(%s)'
+        elif field.variant == messages.Variant.MESSAGE:
+            template = 'apitools_base.JsonToMessage(%s, %%s)' % type_name
+        elif field.variant == messages.Variant.ENUM:
+            template = '%s(%%s)' % type_name
+        elif field.variant == messages.Variant.STRING:
+            template = "%s.decode('utf8')"
+
+        if self.__FieldIsRepeated(extended_field.field_descriptor):
+            if template:
+                template = '[%s for x in %%s]' % (template % 'x')
+
+        return template
+
+    def __FieldIsRequired(self, field):
+        return field.label == descriptor.FieldDescriptor.Label.REQUIRED
+
+    def __FieldIsRepeated(self, field):
+        return field.label == descriptor.FieldDescriptor.Label.REPEATED
+
+    def __FlagInfoFromField(self, extended_field, extended_message, fv=''):
+        field = extended_field.field_descriptor
+        flag_info = FlagInfo()
+        flag_info.name = str(field.name)
+        # TODO(craigcitro): We should key by variant.
+        flag_info.type = _VARIANT_TO_FLAG_TYPE_MAP[field.variant]
+        flag_info.description = extended_field.description
+        if field.default_value:
+            # TODO(craigcitro): Formatting?
+            flag_info.default = field.default_value
+        if flag_info.type == 'enum':
+            # TODO(craigcitro): Does protorpc do this for us?
+            enum_type = self.__LookupMessage(extended_message, field)
+            if enum_type is None:
+                raise ValueError('Cannot find enum type %s', field.type_name)
+            flag_info.enum_values = [x.name for x in enum_type.values]
+            # Note that this choice is completely arbitrary -- but we only
+            # push the value through if the user specifies it, so this
+            # doesn't hurt anything.
+            if flag_info.default is None:
+                flag_info.default = flag_info.enum_values[0]
+        if self.__FieldIsRequired(field):
+            flag_info.required = True
+        flag_info.fv = fv
+        flag_info.conversion = self.__GetConversion(
+            extended_field, extended_message)
+        return flag_info
+
+    def __PrintFlagDeclarations(self, printer):
+        package = self.__client_info.package
+        function_name = '_Declare%sFlags' % (package[0].upper() + package[1:])
+        printer()
+        printer()
+        printer('def %s():', function_name)
+        with printer.Indent():
+            printer('"""Declare global flags in an idempotent way."""')
+            printer("if 'api_endpoint' in flags.FLAGS:")
+            with printer.Indent():
+                printer('return')
+            printer('flags.DEFINE_string(')
+            with printer.Indent('    '):
+                printer("'api_endpoint',")
+                printer('%r,', self.__base_url)
+                printer("'URL of the API endpoint to use.',")
+                printer("short_name='%s_url')", self.__package)
+            printer('flags.DEFINE_string(')
+            with printer.Indent('    '):
+                printer("'history_file',")
+                printer('%r,', '~/.%s.%s.history' %
+                        (self.__package, self.__version))
+                printer("'File with interactive shell history.')")
+            printer('flags.DEFINE_multistring(')
+            with printer.Indent('    '):
+                printer("'add_header', [],")
+                printer("'Additional http headers (as key=value strings). '")
+                printer("'Can be specified multiple times.')")
+            printer('flags.DEFINE_string(')
+            with printer.Indent('    '):
+                printer("'service_account_json_keyfile', '',")
+                printer("'Filename for a JSON service account key downloaded'")
+                printer("' from the Developer Console.')")
+            for flag_info in self.__global_flags:
+                self.__PrintFlag(printer, flag_info)
+        printer()
+        printer()
+        printer('FLAGS = flags.FLAGS')
+        printer('apitools_base_cli.DeclareBaseFlags()')
+        printer('%s()', function_name)
+
+    def __PrintGetGlobalParams(self, printer):
+        printer('def GetGlobalParamsFromFlags():')
+        with printer.Indent():
+            printer('"""Return a StandardQueryParameters based on flags."""')
+            printer('result = messages.StandardQueryParameters()')
+
+            for flag_info in self.__global_flags:
+                rhs = 'FLAGS.%s' % flag_info.name
+                if flag_info.conversion:
+                    rhs = flag_info.conversion % rhs
+                printer('if FLAGS[%r].present:', flag_info.name)
+                with printer.Indent():
+                    printer('result.%s = %s', flag_info.name, rhs)
+            printer('return result')
+        printer()
+        printer()
+
+    def __PrintGetClient(self, printer):
+        printer('def GetClientFromFlags():')
+        with printer.Indent():
+            printer('"""Return a client object, configured from flags."""')
+            printer('log_request = FLAGS.log_request or '
+                    'FLAGS.log_request_response')
+            printer('log_response = FLAGS.log_response or '
+                    'FLAGS.log_request_response')
+            printer('api_endpoint = apitools_base.NormalizeApiEndpoint('
+                    'FLAGS.api_endpoint)')
+            printer("additional_http_headers = dict(x.split('=', 1) for x in "
+                    "FLAGS.add_header)")
+            printer('credentials_args = {')
+            with printer.Indent('    '):
+                printer("'service_account_json_keyfile': os.path.expanduser("
+                        'FLAGS.service_account_json_keyfile)')
+            printer('}')
+            printer('try:')
+            with printer.Indent():
+                printer('client = client_lib.%s(',
+                        self.__client_info.client_class_name)
+                with printer.Indent(indent='    '):
+                    printer('api_endpoint, log_request=log_request,')
+                    printer('log_response=log_response,')
+                    printer('credentials_args=credentials_args,')
+                    printer('additional_http_headers=additional_http_headers)')
+            printer('except apitools_base.CredentialsError as e:')
+            with printer.Indent():
+                printer("print 'Error creating credentials: %%s' %% e")
+                printer('sys.exit(1)')
+            printer('return client')
+        printer()
+        printer()
+
+    def __PrintCommandDocstring(self, printer, command_info):
+        with printer.CommentContext():
+            for line in textwrap.wrap('"""%s' % command_info.description,
+                                      printer.CalculateWidth()):
+                printer(line)
+            extended_descriptor.PrintIndentedDescriptions(
+                printer, command_info.args, 'Args')
+            extended_descriptor.PrintIndentedDescriptions(
+                printer, command_info.flags, 'Flags')
+            printer('"""')
+
+    def __PrintFlag(self, printer, flag_info):
+        printer('flags.DEFINE_%s(', flag_info.type)
+        with printer.Indent(indent='    '):
+            printer('%r,', flag_info.name)
+            printer('%r,', flag_info.default)
+            if flag_info.type == 'enum':
+                printer('%r,', flag_info.enum_values)
+
+            # TODO(craigcitro): Consider using 'drop_whitespace' elsewhere.
+            description_lines = textwrap.wrap(
+                flag_info.description, 75 - len(printer.indent),
+                drop_whitespace=False)
+            for line in description_lines[:-1]:
+                printer('%r', line)
+            last_line = description_lines[-1] if description_lines else ''
+            printer('%r%s', last_line, ',' if flag_info.fv else ')')
+            if flag_info.fv:
+                printer('flag_values=%s)', flag_info.fv)
+        if flag_info.required:
+            printer('flags.MarkFlagAsRequired(%r)', flag_info.name)
+
+    def __PrintPyShell(self, printer):
+        printer('class PyShell(appcommands.Cmd):')
+        printer()
+        with printer.Indent():
+            printer('def Run(self, _):')
+            with printer.Indent():
+                printer(
+                    '"""Run an interactive python shell with the client."""')
+                printer('client = GetClientFromFlags()')
+                printer('params = GetGlobalParamsFromFlags()')
+                printer('for field in params.all_fields():')
+                with printer.Indent():
+                    printer('value = params.get_assigned_value(field.name)')
+                    printer('if value != field.default:')
+                    with printer.Indent():
+                        printer('client.AddGlobalParam(field.name, value)')
+                printer('banner = """')
+                printer('       == %s interactive console ==' % (
+                    self.__client_info.package))
+                printer('             client: a %s client' %
+                        self.__client_info.package)
+                printer('      apitools_base: base apitools module')
+                printer('     messages: the generated messages module')
+                printer('"""')
+                printer('local_vars = {')
+                with printer.Indent(indent='    '):
+                    printer("'apitools_base': apitools_base,")
+                    printer("'client': client,")
+                    printer("'client_lib': client_lib,")
+                    printer("'messages': messages,")
+                printer('}')
+                printer("if platform.system() == 'Linux':")
+                with printer.Indent():
+                    printer('console = apitools_base_cli.ConsoleWithReadline(')
+                    with printer.Indent(indent='    '):
+                        printer('local_vars, histfile=FLAGS.history_file)')
+                printer('else:')
+                with printer.Indent():
+                    printer('console = code.InteractiveConsole(local_vars)')
+                printer('try:')
+                with printer.Indent():
+                    printer('console.interact(banner)')
+                printer('except SystemExit as e:')
+                with printer.Indent():
+                    printer('return e.code')
+        printer()
+        printer()
+
+    def WriteFile(self, printer):
+        """Write a simple CLI (currently just a stub)."""
+        printer('#!/usr/bin/env python')
+        printer('"""CLI for %s, version %s."""',
+                self.__package, self.__version)
+        printer('# NOTE: This file is autogenerated and should not be edited '
+                'by hand.')
+        # TODO(craigcitro): Add a build stamp, along with some other
+        # information.
+        printer()
+        printer('import code')
+        printer('import os')
+        printer('import platform')
+        printer('import sys')
+        printer()
+        printer('from %s import message_types', self.__protorpc_package)
+        printer('from %s import messages', self.__protorpc_package)
+        printer()
+        appcommands_import = 'from google.apputils import appcommands'
+        printer(appcommands_import)
+
+        flags_import = 'import gflags as flags'
+        printer(flags_import)
+        printer()
+        printer('import %s as apitools_base', self.__base_files_package)
+        printer('from %s import cli as apitools_base_cli',
+                self.__base_files_package)
+        import_prefix = ''
+        printer('%simport %s as client_lib',
+                import_prefix, self.__client_info.client_rule_name)
+        printer('%simport %s as messages',
+                import_prefix, self.__client_info.messages_rule_name)
+        self.__PrintFlagDeclarations(printer)
+        printer()
+        printer()
+        self.__PrintGetGlobalParams(printer)
+        self.__PrintGetClient(printer)
+        self.__PrintPyShell(printer)
+        self.__PrintCommands(printer)
+        printer('def main(_):')
+        with printer.Indent():
+            printer("appcommands.AddCmd('pyshell', PyShell)")
+            for command_info in self.__command_list:
+                printer("appcommands.AddCmd('%s', %s)",
+                        command_info.name, command_info.class_name)
+            printer()
+            printer('apitools_base_cli.SetupLogger()')
+            # TODO(craigcitro): Just call SetDefaultCommand as soon as
+            # another appcommands release happens and this exists
+            # externally.
+            printer("if hasattr(appcommands, 'SetDefaultCommand'):")
+            with printer.Indent():
+                printer("appcommands.SetDefaultCommand('pyshell')")
+        printer()
+        printer()
+        printer('run_main = apitools_base_cli.run_main')
+        printer()
+        printer("if __name__ == '__main__':")
+        with printer.Indent():
+            printer('appcommands.Run()')
+
+    def __PrintCommands(self, printer):
+        """Print all commands in this registry using printer."""
+        for command_info in self.__command_list:
+            arg_list = [arg_info.name for arg_info in command_info.args]
+            printer(
+                'class %s(apitools_base_cli.NewCmd):', command_info.class_name)
+            with printer.Indent():
+                printer('"""Command wrapping %s."""',
+                        command_info.client_method_path)
+                printer()
+                printer('usage = """%s%s%s"""',
+                        command_info.name,
+                        ' ' if arg_list else '',
+                        ' '.join('<%s>' % argname for argname in arg_list))
+                printer()
+                printer('def __init__(self, name, fv):')
+                with printer.Indent():
+                    printer('super(%s, self).__init__(name, fv)',
+                            command_info.class_name)
+                    for flag in command_info.flags:
+                        self.__PrintFlag(printer, flag)
+                printer()
+                printer('def RunWithArgs(%s):', ', '.join(['self'] + arg_list))
+                with printer.Indent():
+                    self.__PrintCommandDocstring(printer, command_info)
+                    printer('client = GetClientFromFlags()')
+                    printer('global_params = GetGlobalParamsFromFlags()')
+                    printer(
+                        'request = messages.%s(', command_info.request_type)
+                    with printer.Indent(indent='    '):
+                        for arg in command_info.args:
+                            rhs = arg.name
+                            if arg.conversion:
+                                rhs = arg.conversion % arg.name
+                            printer('%s=%s,', arg.name, rhs)
+                        printer(')')
+                    for flag_info in command_info.flags:
+                        if flag_info.special:
+                            continue
+                        rhs = 'FLAGS.%s' % flag_info.name
+                        if flag_info.conversion:
+                            rhs = flag_info.conversion % rhs
+                        printer('if FLAGS[%r].present:', flag_info.name)
+                        with printer.Indent():
+                            printer('request.%s = %s', flag_info.name, rhs)
+                    call_args = ['request', 'global_params=global_params']
+                    if command_info.has_upload:
+                        call_args.append('upload=upload')
+                        printer('upload = None')
+                        printer('if FLAGS.upload_filename:')
+                        with printer.Indent():
+                            printer('upload = apitools_base.Upload.FromFile(')
+                            printer('    FLAGS.upload_filename, '
+                                    'FLAGS.upload_mime_type,')
+                            printer('    progress_callback='
+                                    'apitools_base.UploadProgressPrinter,')
+                            printer('    finish_callback='
+                                    'apitools_base.UploadCompletePrinter)')
+                    if command_info.has_download:
+                        call_args.append('download=download')
+                        printer('download = None')
+                        printer('if FLAGS.download_filename:')
+                        with printer.Indent():
+                            printer('download = apitools_base.Download.'
+                                    'FromFile(FLAGS.download_filename, '
+                                    'overwrite=FLAGS.overwrite,')
+                            printer('    progress_callback='
+                                    'apitools_base.DownloadProgressPrinter,')
+                            printer('    finish_callback='
+                                    'apitools_base.DownloadCompletePrinter)')
+                    printer(
+                        'result = client.%s(', command_info.client_method_path)
+                    with printer.Indent(indent='    '):
+                        printer('%s)', ', '.join(call_args))
+                    printer('print apitools_base_cli.FormatOutput(result)')
+            printer()
+            printer()