| #!/usr/bin/env python |
| # encoding: utf-8 |
| # Philipp Bender, 2012 |
| # Matt Clarkson, 2012 |
| |
| import re |
| from waflib.Task import Task |
| from waflib.TaskGen import extension |
| |
| """ |
| A simple tool to integrate protocol buffers into your build system. |
| |
| Example:: |
| |
| def configure(conf): |
| conf.load('compiler_cxx cxx protoc') |
| |
| def build(bld): |
| bld( |
| features = 'cxx cxxprogram' |
| source = 'main.cpp file1.proto proto/file2.proto', |
| include = '. proto', |
| target = 'executable') |
| |
| Notes when using this tool: |
| |
| - protoc command line parsing is tricky. |
| |
| The generated files can be put in subfolders which depend on |
| the order of the include paths. |
| |
| Try to be simple when creating task generators |
| containing protoc stuff. |
| |
| """ |
| |
| class protoc(Task): |
| # protoc expects the input proto file to be an absolute path. |
| run_str = '${PROTOC} ${PROTOC_FLAGS} ${PROTOC_ST:INCPATHS} ${SRC[0].abspath()}' |
| color = 'BLUE' |
| ext_out = ['.h', 'pb.cc'] |
| def scan(self): |
| """ |
| Scan .proto dependencies |
| """ |
| node = self.inputs[0] |
| |
| nodes = [] |
| names = [] |
| seen = [] |
| |
| if not node: return (nodes, names) |
| |
| search_paths = [self.generator.path.find_node(x) for x in self.generator.includes] |
| |
| def parse_node(node): |
| if node in seen: |
| return |
| seen.append(node) |
| code = node.read().split("\n") |
| for line in code: |
| m = re.search(r'^import\s+"(.*)";.*(//)?.*', line) |
| if m: |
| dep = m.groups()[0] |
| for incpath in search_paths: |
| found = incpath.find_resource(dep) |
| if found: |
| nodes.append(found) |
| parse_node(found) |
| else: |
| names.append(dep) |
| |
| parse_node(node) |
| return (nodes, names) |
| |
| @extension('.proto') |
| def process_protoc(self, node): |
| cpp_node = node.change_ext('.pb.cc') |
| hpp_node = node.change_ext('.pb.h') |
| self.create_task('protoc', node, [cpp_node, hpp_node]) |
| self.source.append(cpp_node) |
| |
| if 'cxx' in self.features and not self.env.PROTOC_FLAGS: |
| self.env.PROTOC_FLAGS = '--cpp_out=%s' % node.parent.get_bld().abspath() |
| |
| use = getattr(self, 'use', '') |
| if not 'PROTOBUF' in use: |
| self.use = self.to_list(use) + ['PROTOBUF'] |
| |
| def configure(conf): |
| conf.check_cfg(package="protobuf", uselib_store="PROTOBUF", args=['--cflags', '--libs']) |
| conf.find_program('protoc', var='PROTOC') |
| conf.env.PROTOC_ST = '-I%s' |
| |