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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import sys
import subprocess
import datetime
import argparse
import re
git_repo_path = os.path.abspath(subprocess.check_output(['git', 'rev-parse', '--show-toplevel']).strip())
def lowerCamlCaseForUnderscoredText(name):
splits = name.split('_')
splits = [split.title() for split in splits]
splits[0] = splits[0].lower()
return ''.join(splits)
# The generated code for "Apple Swift Protos" suppresses
# adjacent capital letters in lowerCamlCase.
def lowerCamlCaseForUnderscoredText_wrapped(name):
chars = []
lastWasUpper = False
for char in name:
if lastWasUpper:
char = char.lower()
chars.append(char)
lastWasUpper = (char.upper() == char)
result = ''.join(chars)
if result.endswith('Id'):
result = result[:-2] + 'ID'
return result
# Provides conext for writing an indented block surrounded by braces.
#
# e.g.
#
# with BracedContext('class Foo', writer) as writer:
# with BracedContext('func bar() -> Bool', writer) as writer:
# return true
#
# Produces:
#
# class Foo {
# func bar() -> Bool {
# return true
# }
# }
#
class BracedContext:
def __init__(self, line, writer):
self.writer = writer
writer.add('%s {' % line)
def __enter__(self):
self.writer.push_indent()
return self.writer
def __exit__(self, *args):
self.writer.pop_indent()
self.writer.add('}')
class WriterContext:
def __init__(self, proto_name, swift_name, parent=None):
self.proto_name = proto_name
self.swift_name = swift_name
self.parent = parent
self.name_map = {}
class LineWriter:
def __init__(self, args):
self.contexts = []
# self.indent = 0
self.lines = []
self.args = args
self.current_indent = 0
def braced(self, line):
return BracedContext(line, self)
def push_indent(self):
self.current_indent = self.current_indent + 1
def pop_indent(self):
self.current_indent = self.current_indent - 1
if self.current_indent < 0:
raise Exception('Invalid indentation')
def all_context_proto_names(self):
return [context.proto_name for context in self.contexts]
def current_context(self):
return self.contexts[-1]
def indent(self):
return self.current_indent
# return len(self.contexts)
def push_context(self, proto_name, swift_name):
self.contexts.append(WriterContext(proto_name, swift_name))
self.push_indent()
def pop_context(self):
self.contexts.pop()
self.pop_indent()
def add(self, line):
self.lines.append((' ' * self.indent()) + line)
def add_raw(self, line):
self.lines.append(line)
def extend(self, text):
for line in text.split('\n'):
self.add(line)
def join(self):
lines = [line.rstrip() for line in self.lines]
return '\n'.join(lines)
def rstrip(self):
lines = self.lines
while len(lines) > 0 and len(lines[-1].strip()) == 0:
lines = lines[:-1]
self.lines = lines
def newline(self):
self.add('')
class BaseContext(object):
def __init__(self):
self.parent = None
self.proto_name = None
def inherited_proto_names(self):
if self.parent is None:
return []
if self.proto_name is None:
return []
return self.parent.inherited_proto_names() + [self.proto_name,]
def derive_swift_name(self):
names = self.inherited_proto_names()
return self.args.wrapper_prefix + ''.join(names)
def derive_wrapped_swift_name(self):
names = self.inherited_proto_names()
return self.args.proto_prefix + '_' + '.'.join(names)
def children(self):
return []
def descendents(self):
result = []
for child in self.children():
result.append(child)
result.extend(child.descendents())
return result
def siblings(self):
result = []
if self.parent is not None:
result = self.parent.children()
return result
def ancestors(self):
result = []
if self.parent is not None:
result.append(self.parent)
result.extend(self.parent.ancestors())
return result
def context_for_proto_type(self, field):
candidates = []
candidates.extend(self.descendents())
candidates.extend(self.siblings())
for ancestor in self.ancestors():
if ancestor.proto_name is None:
# Ignore the root context
continue
candidates.append(ancestor)
candidates.extend(ancestor.siblings())
for candidate in candidates:
if candidate.proto_name == field.proto_type:
return candidate
return None
def base_swift_type_for_field(self, field):
if field.proto_type == 'string':
return 'String'
elif field.proto_type == 'uint64':
return 'UInt64'
elif field.proto_type == 'uint32':
return 'UInt32'
elif field.proto_type == 'fixed64':
return 'UInt64'
elif field.proto_type == 'bool':
return 'Bool'
elif field.proto_type == 'bytes':
return 'Data'
else:
matching_context = self.context_for_proto_type(field)
if matching_context is not None:
return matching_context.swift_name
else:
# Failure
return field.proto_type
def swift_type_for_field(self, field, suppress_optional=False):
base_type = self.base_swift_type_for_field(field)
if field.rules == 'optional':
if suppress_optional:
return base_type
can_be_optional = self.can_field_be_optional(field)
if can_be_optional:
return '%s?' % base_type
else:
return base_type
elif field.rules == 'required':
return base_type
elif field.rules == 'repeated':
return '[%s]' % base_type
else:
raise Exception('Unknown field type')
def is_field_primitive(self, field):
return field.proto_type in ('uint64',
'uint32',
'fixed64',
'bool', )
def can_field_be_optional(self, field):
if self.is_field_primitive(field):
return not field.is_required
# if field.proto_type == 'uint64':
# return False
# elif field.proto_type == 'uint32':
# return False
# elif field.proto_type == 'fixed64':
# return False
# elif field.proto_type == 'bool':
# return False
# elif self.is_field_an_enum(field):
if self.is_field_an_enum(field):
return False
else:
return True
def is_field_an_enum(self, field):
matching_context = self.context_for_proto_type(field)
if matching_context is not None:
if type(matching_context) is EnumContext:
return True
return False
def is_field_a_proto(self, field):
matching_context = self.context_for_proto_type(field)
if matching_context is not None:
if type(matching_context) is MessageContext:
return True
return False
def default_value_for_field(self, field):
if field.rules == 'repeated':
return '[]'
if field.default_value is not None and len(field.default_value) > 0:
return field.default_value
if field.rules == 'optional':
can_be_optional = self.can_field_be_optional(field)
if can_be_optional:
return 'nil'
if field.proto_type == 'uint64':
return '0'
elif field.proto_type == 'uint32':
return '0'
elif field.proto_type == 'fixed64':
return '0'
elif field.proto_type == 'bool':
return 'false'
elif self.is_field_an_enum(field):
# TODO: Assert that rules is empty.
enum_context = self.context_for_proto_type(field)
return enum_context.default_value()
return None
class FileContext(BaseContext):
def __init__(self, args):
BaseContext.__init__(self)
self.args = args
self.messages = []
self.enums = []
def children(self):
return self.enums + self.messages
def prepare(self):
for child in self.children():
child.prepare()
def generate(self, writer):
writer.extend('''//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
import Foundation
''')
writer.extend('''
// WARNING: This code is generated. Only edit within the markers.
'''.strip())
writer.newline()
writer.invalid_protobuf_error_name = '%sError' % self.args.wrapper_prefix
writer.extend(('''
public enum %s: Error {
case invalidProtobuf(description: String)
}
''' % writer.invalid_protobuf_error_name).strip())
writer.newline()
for child in self.children():
child.generate(writer)
class MessageField:
def __init__(self, name, index, rules, proto_type, default_value, sort_index, is_required):
self.name = name
self.index = index
self.rules = rules
self.proto_type = proto_type
self.default_value = default_value
self.sort_index = sort_index
self.is_required = is_required
def has_accessor_name(self):
name = 'has' + self.name_swift[0].upper() + self.name_swift[1:]
if name == 'hasId':
# TODO: I'm not sure why "Apple Swift Proto" code formats the
# the name in this way.
name = 'hasID'
elif name == 'hasUrl':
# TODO: I'm not sure why "Apple Swift Proto" code formats the
# the name in this way.
name = 'hasURL'
return name
class MessageContext(BaseContext):
def __init__(self, args, parent, proto_name):
BaseContext.__init__(self)
self.args = args
self.parent = parent
self.proto_name = proto_name
self.messages = []
self.enums = []
self.field_map = {}
def fields(self):
fields = self.field_map.values()
fields = sorted(fields, key=lambda f: f.sort_index)
return fields
def field_indices(self):
return [field.index for field in self.fields()]
def field_names(self):
return [field.name for field in self.fields()]
def children(self):
return self.enums + self.messages
def prepare(self):
self.swift_name = self.derive_swift_name()
self.swift_builder_name = "%sBuilder" % self.swift_name
for child in self.children():
child.prepare()
def generate(self, writer):
for child in self.messages:
child.generate(writer)
writer.add('// MARK: - %s' % self.swift_name)
writer.newline()
writer.add('@objc public class %s: NSObject {' % self.swift_name)
writer.newline()
writer.push_context(self.proto_name, self.swift_name)
for child in self.enums:
child.generate(writer)
wrapped_swift_name = self.derive_wrapped_swift_name()
# Prepare fields
explict_fields = []
implict_fields = []
for field in self.fields():
field.type_swift = self.swift_type_for_field(field)
field.type_swift_not_optional = self.swift_type_for_field(field, suppress_optional=True)
field.name_swift = lowerCamlCaseForUnderscoredText_wrapped(field.name)
is_explicit = False
if field.is_required:
is_explicit = True
elif self.is_field_a_proto(field):
is_explicit = True
if is_explicit:
explict_fields.append(field)
else:
implict_fields.append(field)
self.generate_builder(writer)
writer.add('fileprivate let proto: %s' % wrapped_swift_name )
writer.newline()
# Property Declarations
if len(explict_fields) > 0:
for field in explict_fields:
type_name = field.type_swift_not_optional if field.is_required else field.type_swift
writer.add('@objc public let %s: %s' % (field.name_swift, type_name))
if (not field.is_required) and field.rules != 'repeated' and (not self.is_field_a_proto(field)):
writer.add('@objc public var %s: Bool {' % field.has_accessor_name() )
writer.push_indent()
writer.add('return proto.%s' % field.has_accessor_name() )
writer.pop_indent()
writer.add('}')
writer.newline()
if len(implict_fields) > 0:
for field in implict_fields:
if field.rules == 'optional':
can_be_optional = (not self.is_field_primitive(field)) and (not self.is_field_an_enum(field))
if can_be_optional:
writer.add('@objc public var %s: %s? {' % (field.name_swift, field.type_swift_not_optional))
writer.push_indent()
writer.add('guard proto.%s else {' % field.has_accessor_name() )
writer.push_indent()
writer.add('return nil')
writer.pop_indent()
writer.add('}')
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('return %s.%sWrap(proto.%s)' % ( enum_context.parent.swift_name, enum_context.swift_name, field.name_swift, ) )
else:
writer.add('return proto.%s' % field.name_swift )
writer.pop_indent()
writer.add('}')
else:
writer.add('@objc public var %s: %s {' % (field.name_swift, field.type_swift_not_optional))
writer.push_indent()
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('return %s.%sWrap(proto.%s)' % ( enum_context.parent.swift_name, enum_context.swift_name, field.name_swift, ) )
else:
writer.add('return proto.%s' % field.name_swift )
writer.pop_indent()
writer.add('}')
writer.add('@objc public var %s: Bool {' % field.has_accessor_name() )
writer.push_indent()
writer.add('return proto.%s' % field.has_accessor_name() )
writer.pop_indent()
writer.add('}')
writer.newline()
elif field.rules == 'repeated':
writer.add('@objc public var %s: %s {' % (field.name_swift, field.type_swift_not_optional))
writer.push_indent()
writer.add('return proto.%s' % field.name_swift )
writer.pop_indent()
writer.add('}')
writer.newline()
else:
writer.add('@objc public var %s: %s {' % (field.name_swift, field.type_swift_not_optional))
writer.push_indent()
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('return %sUnwrap(proto.%s)' % ( enum_context.swift_name, field.name_swift, ) )
else:
writer.add('return proto.%s' % field.name_swift )
writer.pop_indent()
writer.add('}')
writer.newline()
# Initializer
initializer_parameters = []
initializer_parameters.append('proto: %s' % wrapped_swift_name)
initializer_prefix = 'private init('
for field in explict_fields:
type_name = field.type_swift_not_optional if field.is_required else field.type_swift
parameter = '%s: %s' % (field.name_swift, type_name)
parameter = '\n' + ' ' * len(initializer_prefix) + parameter
initializer_parameters.append(parameter)
initializer_parameters = ', '.join(initializer_parameters)
writer.extend('%s%s) {' % ( initializer_prefix, initializer_parameters, ) )
writer.push_indent()
writer.add('self.proto = proto')
for field in explict_fields:
writer.add('self.%s = %s' % (field.name_swift, field.name_swift))
writer.pop_indent()
writer.add('}')
writer.newline()
# serializedData() func
writer.extend(('''
@objc
public func serializedData() throws -> Data {
return try self.proto.serializedData()
}
''').strip())
writer.newline()
# parseData() func
writer.add('@objc public class func parseData(_ serializedData: Data) throws -> %s {' % self.swift_name)
writer.push_indent()
writer.add('let proto = try %s(serializedData: serializedData)' % ( wrapped_swift_name, ) )
writer.add('return try parseProto(proto)')
writer.pop_indent()
writer.add('}')
writer.newline()
# parseData() func
writer.add('fileprivate class func parseProto(_ proto: %s) throws -> %s {' % ( wrapped_swift_name, self.swift_name, ) )
writer.push_indent()
for field in explict_fields:
if field.is_required:
# if self.can_field_be_optional(field):
writer.add('guard proto.%s else {' % field.has_accessor_name() )
writer.push_indent()
writer.add('throw %s.invalidProtobuf(description: "\(logTag) missing required field: %s")' % ( writer.invalid_protobuf_error_name, field.name_swift, ) )
writer.pop_indent()
writer.add('}')
if self.is_field_an_enum(field):
# TODO: Assert that rules is empty.
enum_context = self.context_for_proto_type(field)
writer.add('let %s = %sWrap(proto.%s)' % ( field.name_swift, enum_context.swift_name, field.name_swift, ) )
elif self.is_field_a_proto(field):
writer.add('let %s = try %s.parseProto(proto.%s)' % (field.name_swift, self.base_swift_type_for_field(field), field.name_swift)),
else:
writer.add('let %s = proto.%s' % ( field.name_swift, field.name_swift, ) )
writer.newline()
continue
default_value = self.default_value_for_field(field)
if default_value is None:
writer.add('var %s: %s' % (field.name_swift, field.type_swift))
else:
writer.add('var %s: %s = %s' % (field.name_swift, field.type_swift, default_value))
if field.rules == 'repeated':
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('%s = proto.%s.map { %sWrap($0) }' % ( field.name_swift, field.name_swift, enum_context.swift_name, ) )
elif self.is_field_a_proto(field):
writer.add('%s = try proto.%s.map { try %s.parseProto($0) }' % ( field.name_swift, field.name_swift, self.base_swift_type_for_field(field), ) )
else:
writer.add('%s = proto.%s' % ( field.name_swift, field.name_swift, ) )
else:
writer.add('if proto.%s {' % field.has_accessor_name() )
writer.push_indent()
if self.is_field_an_enum(field):
# TODO: Assert that rules is empty.
enum_context = self.context_for_proto_type(field)
writer.add('%s = %sWrap(proto.%s)' % ( field.name_swift, enum_context.swift_name, field.name_swift, ) )
elif self.is_field_a_proto(field):
writer.add('%s = try %s.parseProto(proto.%s)' % (field.name_swift, self.base_swift_type_for_field(field), field.name_swift)),
else:
writer.add('%s = proto.%s' % ( field.name_swift, field.name_swift, ) )
writer.pop_indent()
writer.add('}')
writer.newline()
writer.add('// MARK: - Begin Validation Logic for %s -' % self.swift_name)
writer.newline()
# Preserve existing validation logic.
if self.swift_name in args.validation_map:
validation_block = args.validation_map[self.swift_name]
if validation_block:
writer.add_raw(validation_block)
writer.newline()
writer.add('// MARK: - End Validation Logic for %s -' % self.swift_name)
writer.newline()
initializer_prefix = 'let result = %s(' % self.swift_name
initializer_arguments = []
initializer_arguments.append('proto: proto')
for field in explict_fields:
argument = '%s: %s' % (field.name_swift, field.name_swift)
argument = '\n' + ' ' * len(initializer_prefix) + argument
initializer_arguments.append(argument)
initializer_arguments = ', '.join(initializer_arguments)
writer.extend('%s%s)' % ( initializer_prefix, initializer_arguments, ) )
writer.add('return result')
writer.pop_indent()
writer.add('}')
writer.newline()
# description
writer.add('@objc public override var debugDescription: String {')
writer.push_indent()
writer.add('return "\(proto)"')
writer.pop_indent()
writer.add('}')
writer.newline()
writer.pop_context()
writer.rstrip()
writer.add('}')
writer.newline()
self.generate_debug_extension(writer)
def generate_debug_extension(self, writer):
writer.add('#if DEBUG')
writer.newline()
with writer.braced('extension %s' % self.swift_name) as writer:
with writer.braced('@objc public func serializedDataIgnoringErrors() -> Data?') as writer:
writer.add('return try! self.serializedData()')
writer.newline()
with writer.braced('extension %s.%s' % ( self.swift_name, self.swift_builder_name )) as writer:
with writer.braced('@objc public func buildIgnoringErrors() -> %s?' % self.swift_name) as writer:
writer.add('return try! self.build()')
writer.newline()
writer.add('#endif')
writer.newline()
def generate_builder(self, writer):
wrapped_swift_name = self.derive_wrapped_swift_name()
writer.add('// MARK: - %s' % self.swift_builder_name)
writer.newline()
# Required Fields
required_fields = [field for field in self.fields() if field.is_required]
required_init_params = []
required_init_args = []
if len(required_fields) > 0:
for field in required_fields:
if field.rules == 'repeated':
param_type = '[' + self.base_swift_type_for_field(field) + ']'
else:
param_type = self.base_swift_type_for_field(field)
required_init_params.append('%s: %s' % ( field.name_swift, param_type) )
required_init_args.append('%s: %s' % ( field.name_swift, field.name_swift) )
# Convenience accessor.
with writer.braced('@objc public class func builder(%s) -> %s' % (
', '.join(required_init_params),
self.swift_builder_name,
)) as writer:
writer.add('return %s(%s)' % (self.swift_builder_name, ', '.join(required_init_args), ))
writer.newline()
# asBuilder()
writer.add('// asBuilder() constructs a builder that reflects the proto\'s contents.')
with writer.braced('@objc public func asBuilder() -> %s' % (
self.swift_builder_name,
)) as writer:
writer.add('let builder = %s(%s)' % (self.swift_builder_name, ', '.join(required_init_args), ))
for field in self.fields():
if field.is_required:
continue
accessor_name = field.name_swift
accessor_name = 'set' + accessor_name[0].upper() + accessor_name[1:]
can_be_optional = (not self.is_field_primitive(field)) and (not self.is_field_an_enum(field))
if field.rules == 'repeated':
writer.add('builder.%s(%s)' % ( accessor_name, field.name_swift, ))
elif can_be_optional:
writer.add('if let _value = %s {' % field.name_swift )
writer.push_indent()
writer.add('builder.%s(_value)' % ( accessor_name, ))
writer.pop_indent()
writer.add('}')
else:
writer.add('if %s {' % field.has_accessor_name() )
writer.push_indent()
writer.add('builder.%s(%s)' % ( accessor_name, field.name_swift, ))
writer.pop_indent()
writer.add('}')
writer.add('return builder')
writer.newline()
writer.add('@objc public class %s: NSObject {' % self.swift_builder_name)
writer.newline()
writer.push_context(self.proto_name, self.swift_name)
writer.add('private var proto = %s()' % wrapped_swift_name)
writer.newline()
# Initializer
writer.add('@objc fileprivate override init() {}')
writer.newline()
# Required-Field Initializer
if len(required_fields) > 0:
# writer.add('// Initializer for required fields')
writer.add('@objc fileprivate init(%s) {' % ', '.join(required_init_params))
writer.push_indent()
writer.add('super.init()')
writer.newline()
for field in required_fields:
accessor_name = field.name_swift
accessor_name = 'set' + accessor_name[0].upper() + accessor_name[1:]
writer.add('%s(%s)' % ( accessor_name, field.name_swift, ) )
writer.pop_indent()
writer.add('}')
writer.newline()
# Setters
for field in self.fields():
if field.rules == 'repeated':
# Add
accessor_name = field.name_swift
accessor_name = 'add' + accessor_name[0].upper() + accessor_name[1:]
writer.add('@objc public func %s(_ valueParam: %s) {' % ( accessor_name, self.base_swift_type_for_field(field), ))
writer.push_indent()
writer.add('var items = proto.%s' % ( field.name_swift, ) )
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('items.append(%sUnwrap(valueParam))' % enum_context.swift_name )
elif self.is_field_a_proto(field):
writer.add('items.append(valueParam.proto)')
else:
writer.add('items.append(valueParam)')
writer.add('proto.%s = items' % ( field.name_swift, ) )
writer.pop_indent()
writer.add('}')
writer.newline()
# Set
accessor_name = field.name_swift
accessor_name = 'set' + accessor_name[0].upper() + accessor_name[1:]
writer.add('@objc public func %s(_ wrappedItems: [%s]) {' % ( accessor_name, self.base_swift_type_for_field(field), ))
writer.push_indent()
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('proto.%s = wrappedItems.map { %sUnwrap($0) }' % ( field.name_swift, enum_context.swift_name, ) )
elif self.is_field_a_proto(field):
writer.add('proto.%s = wrappedItems.map { $0.proto }' % ( field.name_swift, ) )
else:
writer.add('proto.%s = wrappedItems' % ( field.name_swift, ) )
writer.pop_indent()
writer.add('}')
writer.newline()
else:
accessor_name = field.name_swift
accessor_name = 'set' + accessor_name[0].upper() + accessor_name[1:]
writer.add('@objc public func %s(_ valueParam: %s) {' % ( accessor_name, self.base_swift_type_for_field(field), ))
writer.push_indent()
if self.is_field_an_enum(field):
enum_context = self.context_for_proto_type(field)
writer.add('proto.%s = %sUnwrap(valueParam)' % ( field.name_swift, enum_context.swift_name, ) )
elif self.is_field_a_proto(field):
writer.add('proto.%s = valueParam.proto' % ( field.name_swift, ) )
else:
writer.add('proto.%s = valueParam' % ( field.name_swift, ) )
writer.pop_indent()
writer.add('}')
writer.newline()
# build() func
writer.add('@objc public func build() throws -> %s {' % self.swift_name)
writer.push_indent()
writer.add('return try %s.parseProto(proto)' % self.swift_name)
writer.pop_indent()
writer.add('}')
writer.newline()
# buildSerializedData() func
writer.add('@objc public func buildSerializedData() throws -> Data {')
writer.push_indent()
writer.add('return try %s.parseProto(proto).serializedData()' % self.swift_name)
writer.pop_indent()
writer.add('}')
writer.newline()
# description
if self.args.add_description:
writer.add('@objc public override var description: String {')
writer.push_indent()
writer.add('var fields = [String]()')
for field in self.fields():
writer.add('fields.append("%s: \(proto.%s)")' % ( field.name_swift, field.name_swift, ) )
writer.add('return "[" + fields.joined(separator: ", ") + "]"')
writer.pop_indent()
writer.add('}')
writer.newline()
writer.pop_context()
writer.rstrip()
writer.add('}')
writer.newline()
class EnumContext(BaseContext):
def __init__(self, args, parent, proto_name):
BaseContext.__init__(self)
self.args = args
self.parent = parent
self.proto_name = proto_name
# self.item_names = set()
# self.item_indices = set()
self.item_map = {}
def derive_wrapped_swift_name(self):
# return BaseContext.derive_wrapped_swift_name(self) + 'Enum'
result = BaseContext.derive_wrapped_swift_name(self)
if self.proto_name == 'Type':
result = result + 'Enum'
return result
def item_names(self):
return self.item_map.values()
def item_indices(self):
return self.item_map.keys()
def prepare(self):
self.swift_name = self.derive_swift_name()
for child in self.children():
child.prepare()
def case_pairs(self):
indices = [int(index) for index in self.item_indices()]
indices = sorted(indices)
result = []
for index in indices:
index_str = str(index)
item_name = self.item_map[index_str]
case_name = lowerCamlCaseForUnderscoredText(item_name)
result.append( (case_name, index_str,) )
return result
def default_value(self):
for case_name, case_index in self.case_pairs():
return '.' + case_name
def generate(self, writer):
writer.add('// MARK: - %s' % self.swift_name)
writer.newline()
writer.add('@objc public enum %s: Int32 {' % self.swift_name)
writer.push_context(self.proto_name, self.swift_name)
for case_name, case_index in self.case_pairs():
if case_name == 'default':
case_name = '`default`'
writer.add('case %s = %s' % (case_name, case_index,))
writer.pop_context()
writer.rstrip()
writer.add('}')
writer.newline()
wrapped_swift_name = self.derive_wrapped_swift_name()
writer.add('private class func %sWrap(_ value: %s) -> %s {' % ( self.swift_name, wrapped_swift_name, self.swift_name, ) )
writer.push_indent()
writer.add('switch value {')
for case_name, case_index in self.case_pairs():
writer.add('case .%s: return .%s' % (case_name, case_name,))
writer.add('}')
writer.pop_indent()
writer.add('}')
writer.newline()
writer.add('private class func %sUnwrap(_ value: %s) -> %s {' % ( self.swift_name, self.swift_name, wrapped_swift_name, ) )
writer.push_indent()
writer.add('switch value {')
for case_name, case_index in self.case_pairs():
writer.add('case .%s: return .%s' % (case_name, case_name,))
writer.add('}')
writer.pop_indent()
writer.add('}')
writer.newline()
class LineParser:
def __init__(self, text):
self.lines = text.split('\n')
self.lines.reverse()
self.next_line_comments = []
def next(self):
# lineParser = LineParser(text.split('\n'))
self.next_line_comments = []
while len(self.lines) > 0:
line = self.lines.pop()
line = line.strip()
# if not line:
# continue
comment_index = line.find('//')
if comment_index >= 0:
comment = line[comment_index + len('//'):].strip()
line = line[:comment_index].strip()
if not line:
if comment:
self.next_line_comments.append(comment)
else:
if not line:
self.next_line_comments = []
if not line:
continue
# if args.verbose:
# print 'line:', line
return line
raise StopIteration()
def parse_enum(args, proto_file_path, parser, parent_context, enum_name):
# if args.verbose:
# print '# enum:', enum_name
context = EnumContext(args, parent_context, enum_name)
while True:
try:
line = parser.next()
except StopIteration:
raise Exception('Incomplete enum: %s' % proto_file_path)
if line == '}':
# if args.verbose:
# print
parent_context.enums.append(context)
return
item_regex = re.compile(r'^(.+?)\s*=\s*(\d+?)\s*;$')
item_match = item_regex.search(line)
if item_match:
item_name = item_match.group(1).strip()
item_index = item_match.group(2).strip()
# if args.verbose:
# print '\t enum item[%s]: %s' % (item_index, item_name)
if item_name in context.item_names():
raise Exception('Duplicate enum name[%s]: %s' % (proto_file_path, item_name))
if item_index in context.item_indices():
raise Exception('Duplicate enum index[%s]: %s' % (proto_file_path, item_name))
context.item_map[item_index] = item_name
continue
raise Exception('Invalid enum syntax[%s]: %s' % (proto_file_path, line))
def optional_match_group(match, index):
group = match.group(index)
if group is None:
return None
return group.strip()
def parse_message(args, proto_file_path, parser, parent_context, message_name):
# if args.verbose:
# print '# message:', message_name
context = MessageContext(args, parent_context, message_name)
sort_index = 0
while True:
try:
line = parser.next()
except StopIteration:
raise Exception('Incomplete message: %s' % proto_file_path)
field_comments = parser.next_line_comments
if line == '}':
# if args.verbose:
# print
parent_context.messages.append(context)
return
enum_regex = re.compile(r'^enum\s+(.+?)\s+\{$')
enum_match = enum_regex.search(line)
if enum_match:
enum_name = enum_match.group(1).strip()
parse_enum(args, proto_file_path, parser, context, enum_name)
continue
message_regex = re.compile(r'^message\s+(.+?)\s+\{$')
message_match = message_regex.search(line)
if message_match:
message_name = message_match.group(1).strip()
parse_message(args, proto_file_path, parser, context, message_name)
continue
# Examples:
#
# optional bytes id = 1;
# optional bool isComplete = 2 [default = false];
item_regex = re.compile(r'^(optional|required|repeated)?\s*([\w\d]+?)\s+([\w\d]+?)\s*=\s*(\d+?)\s*(\[default = (true|false)\])?;$')
item_match = item_regex.search(line)
if item_match:
# print 'item_rules:', item_match.groups()
item_rules = optional_match_group(item_match, 1)
item_type = optional_match_group(item_match, 2)
item_name = optional_match_group(item_match, 3)
item_index = optional_match_group(item_match, 4)
# item_defaults_1 = optional_match_group(item_match, 5)
item_default = optional_match_group(item_match, 6)
# print 'item_rules:', item_rules
# print 'item_type:', item_type
# print 'item_name:', item_name
# print 'item_index:', item_index
# print 'item_default:', item_default
message_field = {
'rules': item_rules,
'type': item_type,
'name': item_name,
'index': item_index,
'default': item_default,
'field_comments': field_comments,
}
# print 'message_field:', message_field
# if args.verbose:
# print '\t message field[%s]: %s' % (item_index, str(message_field))
if item_name in context.field_names():
raise Exception('Duplicate message field name[%s]: %s' % (proto_file_path, item_name))
# context.field_names.add(item_name)
if item_index in context.field_indices():
raise Exception('Duplicate message field index[%s]: %s' % (proto_file_path, item_name))
# context.field_indices.add(item_index)
is_required = '@required' in field_comments
# if is_required:
# print 'is_required:', item_name
context.field_map[item_index] = MessageField(item_name, item_index, item_rules, item_type, item_default, sort_index, is_required)
sort_index = sort_index + 1
continue
raise Exception('Invalid message syntax[%s]: %s' % (proto_file_path, line))
def preserve_validation_logic(args, proto_file_path, dst_file_path):
args.validation_map = {}
if os.path.exists(dst_file_path):
with open(dst_file_path, 'rt') as f:
old_text = f.read()
validation_start_regex = re.compile(r'// MARK: - Begin Validation Logic for ([^ ]+) -')
for match in validation_start_regex.finditer(old_text):
# print 'match'
name = match.group(1)
# print '\t name:', name
start = match.end(0)
# print '\t start:', start
end_marker = '// MARK: - End Validation Logic for %s -' % name
end = old_text.find(end_marker)
# print '\t end:', end
if end < start:
raise Exception('Malformed validation: %s, %s' % ( proto_file_path, name, ) )
validation_block = old_text[start:end]
# print '\t validation_block:', validation_block
# Strip trailing whitespace.
validation_lines = validation_block.split('\n')
validation_lines = [line.rstrip() for line in validation_lines]
# Strip leading empty lines.
while len(validation_lines) > 0 and validation_lines[0] == '':
validation_lines = validation_lines[1:]
# Strip trailing empty lines.
while len(validation_lines) > 0 and validation_lines[-1] == '':
validation_lines = validation_lines[:-1]
validation_block = '\n'.join(validation_lines)
if len(validation_block) > 0:
if args.verbose:
print('Preserving validation logic for:', name)
args.validation_map[name] = validation_block
def process_proto_file(args, proto_file_path, dst_file_path):
with open(proto_file_path, 'rt') as f:
text = f.read()
multiline_comment_regex = re.compile(r'/\*.*?\*/', re.MULTILINE|re.DOTALL)
text = multiline_comment_regex.sub('', text)
syntax_regex = re.compile(r'^syntax ')
package_regex = re.compile(r'^package\s+(.+);')
option_regex = re.compile(r'^option ')
parser = LineParser(text)
# lineParser = LineParser(text.split('\n'))
context = FileContext(args)
while True:
try:
line = parser.next()
except StopIteration:
break
if syntax_regex.search(line):
if args.verbose:
print('# Ignoring syntax')
continue
if option_regex.search(line):
if args.verbose:
print('# Ignoring option')
continue
package_match = package_regex.search(line)
if package_match:
if args.package:
raise Exception('More than one package statement: %s' % proto_file_path)
args.package = package_match.group(1).strip()
if args.verbose:
print('# package:', args.package)
continue
message_regex = re.compile(r'^message\s+(.+?)\s+\{$')
message_match = message_regex.search(line)
if message_match:
message_name = message_match.group(1).strip()
parse_message(args, proto_file_path, parser, context, message_name)
continue
raise Exception('Invalid syntax[%s]: %s' % (proto_file_path, line))
preserve_validation_logic(args, proto_file_path, dst_file_path)
writer = LineWriter(args)
context.prepare()
context.generate(writer)
output = writer.join()
with open(dst_file_path, 'wt') as f:
f.write(output)
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='Protocol Buffer Swift Wrapper Generator.')
# parser.add_argument('--all', action='store_true', help='process all files in or below current dir')
# parser.add_argument('--path', help='used to specify a path to a file.')
parser.add_argument('--proto-dir', help='dir path of the proto schema file.')
parser.add_argument('--proto-file', help='filename of the proto schema file.')
parser.add_argument('--wrapper-prefix', help='name prefix for generated wrappers.')
parser.add_argument('--proto-prefix', help='name prefix for proto bufs.')
parser.add_argument('--dst-dir', help='path to the destination directory.')
parser.add_argument('--add-log-tag', action='store_true', help='add log tag properties.')
parser.add_argument('--add-description', action='store_true', help='add log tag properties.')
parser.add_argument('--verbose', action='store_true', help='enables verbose logging')
args = parser.parse_args()
if args.verbose:
print('args:', args)
proto_file_path = os.path.abspath(os.path.join(args.proto_dir, args.proto_file))
if not os.path.exists(proto_file_path):
raise Exception('File does not exist: %s' % proto_file_path)
dst_dir_path = os.path.abspath(args.dst_dir)
if not os.path.exists(dst_dir_path):
raise Exception('Destination does not exist: %s' % dst_dir_path)
dst_file_path = os.path.join(dst_dir_path, "%s.swift" % args.wrapper_prefix)
if args.verbose:
print('dst_file_path:', dst_file_path)
args.package = None
process_proto_file(args, proto_file_path, dst_file_path)
# print 'complete.'