From eede9648d50c3750f6f8d1319a79dd76d7f10b55 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Sat, 15 Sep 2018 14:51:02 +0200 Subject: Squashed 'waflib/' content from commit 982416b8 git-subtree-dir: waflib git-subtree-split: 982416b8a6c6728e200243e1be3ab60435c08830 --- extras/protoc.py | 243 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 243 insertions(+) create mode 100644 extras/protoc.py (limited to 'extras/protoc.py') diff --git a/extras/protoc.py b/extras/protoc.py new file mode 100644 index 00000000..f3cb4d86 --- /dev/null +++ b/extras/protoc.py @@ -0,0 +1,243 @@ +#!/usr/bin/env python +# encoding: utf-8 +# Philipp Bender, 2012 +# Matt Clarkson, 2012 + +import re, os +from waflib.Task import Task +from waflib.TaskGen import extension +from waflib import Errors, Context + +""" +A simple tool to integrate protocol buffers into your build system. + +Example for C++: + + def configure(conf): + conf.load('compiler_cxx cxx protoc') + + def build(bld): + bld( + features = 'cxx cxxprogram' + source = 'main.cpp file1.proto proto/file2.proto', + includes = '. proto', + target = 'executable') + +Example for Python: + + def configure(conf): + conf.load('python protoc') + + def build(bld): + bld( + features = 'py' + source = 'main.py file1.proto proto/file2.proto', + protoc_includes = 'proto') + +Example for both Python and C++ at same time: + + def configure(conf): + conf.load('cxx python protoc') + + def build(bld): + bld( + features = 'cxx py' + source = 'file1.proto proto/file2.proto', + protoc_includes = 'proto') # or includes + + +Example for Java: + + def options(opt): + opt.load('java') + + def configure(conf): + conf.load('python java protoc') + # Here you have to point to your protobuf-java JAR and have it in classpath + conf.env.CLASSPATH_PROTOBUF = ['protobuf-java-2.5.0.jar'] + + def build(bld): + bld( + features = 'javac protoc', + name = 'pbjava', + srcdir = 'inc/ src', # directories used by javac + source = ['inc/message_inc.proto', 'inc/message.proto'], + # source is used by protoc for .proto files + use = 'PROTOBUF', + protoc_includes = ['inc']) # for protoc to search dependencies + + + + +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): + run_str = '${PROTOC} ${PROTOC_FL:PROTOC_FLAGS} ${PROTOC_ST:INCPATHS} ${PROTOC_ST:PROTOC_INCPATHS} ${SRC[0].bldpath()}' + color = 'BLUE' + ext_out = ['.h', 'pb.cc', '.py', '.java'] + def scan(self): + """ + Scan .proto dependencies + """ + node = self.inputs[0] + + nodes = [] + names = [] + seen = [] + search_nodes = [] + + if not node: + return (nodes, names) + + if 'cxx' in self.generator.features: + search_nodes = self.generator.includes_nodes + + if 'py' in self.generator.features or 'javac' in self.generator.features: + for incpath in getattr(self.generator, 'protoc_includes', []): + search_nodes.append(self.generator.bld.path.find_node(incpath)) + + def parse_node(node): + if node in seen: + return + seen.append(node) + code = node.read().splitlines() + for line in code: + m = re.search(r'^import\s+"(.*)";.*(//)?.*', line) + if m: + dep = m.groups()[0] + for incnode in search_nodes: + found = incnode.find_resource(dep) + if found: + nodes.append(found) + parse_node(found) + else: + names.append(dep) + + parse_node(node) + # Add also dependencies path to INCPATHS so protoc will find the included file + for deppath in nodes: + self.env.append_value('INCPATHS', deppath.parent.bldpath()) + return (nodes, names) + +@extension('.proto') +def process_protoc(self, node): + incdirs = [] + out_nodes = [] + protoc_flags = [] + + # ensure PROTOC_FLAGS is a list; a copy is used below anyway + self.env.PROTOC_FLAGS = self.to_list(self.env.PROTOC_FLAGS) + + if 'cxx' in self.features: + cpp_node = node.change_ext('.pb.cc') + hpp_node = node.change_ext('.pb.h') + self.source.append(cpp_node) + out_nodes.append(cpp_node) + out_nodes.append(hpp_node) + protoc_flags.append('--cpp_out=%s' % node.parent.get_bld().bldpath()) + + if 'py' in self.features: + py_node = node.change_ext('_pb2.py') + self.source.append(py_node) + out_nodes.append(py_node) + protoc_flags.append('--python_out=%s' % node.parent.get_bld().bldpath()) + + if 'javac' in self.features: + pkgname, javapkg, javacn, nodename = None, None, None, None + messages = [] + + # .java file name is done with some rules depending on .proto file content: + # -) package is either derived from option java_package if present + # or from package directive + # -) file name is either derived from option java_outer_classname if present + # or the .proto file is converted to camelcase. If a message + # is named the same then the behaviour depends on protoc version + # + # See also: https://developers.google.com/protocol-buffers/docs/reference/java-generated#invocation + + code = node.read().splitlines() + for line in code: + m = re.search(r'^package\s+(.*);', line) + if m: + pkgname = m.groups()[0] + m = re.search(r'^option\s+(\S*)\s*=\s*"(\S*)";', line) + if m: + optname = m.groups()[0] + if optname == 'java_package': + javapkg = m.groups()[1] + elif optname == 'java_outer_classname': + javacn = m.groups()[1] + if self.env.PROTOC_MAJOR > '2': + m = re.search(r'^message\s+(\w*)\s*{*', line) + if m: + messages.append(m.groups()[0]) + + if javapkg: + nodename = javapkg + elif pkgname: + nodename = pkgname + else: + raise Errors.WafError('Cannot derive java name from protoc file') + + nodename = nodename.replace('.',os.sep) + os.sep + if javacn: + nodename += javacn + '.java' + else: + if self.env.PROTOC_MAJOR > '2' and node.abspath()[node.abspath().rfind(os.sep)+1:node.abspath().rfind('.')].title() in messages: + nodename += node.abspath()[node.abspath().rfind(os.sep)+1:node.abspath().rfind('.')].title().replace('_','') + 'OuterClass.java' + else: + nodename += node.abspath()[node.abspath().rfind(os.sep)+1:node.abspath().rfind('.')].title().replace('_','') + '.java' + + java_node = node.parent.find_or_declare(nodename) + out_nodes.append(java_node) + protoc_flags.append('--java_out=%s' % node.parent.get_bld().bldpath()) + + # Make javac get also pick java code generated in build + if not node.parent.get_bld() in self.javac_task.srcdir: + self.javac_task.srcdir.append(node.parent.get_bld()) + + if not out_nodes: + raise Errors.WafError('Feature %r not supported by protoc extra' % self.features) + + tsk = self.create_task('protoc', node, out_nodes) + tsk.env.append_value('PROTOC_FLAGS', protoc_flags) + + if 'javac' in self.features: + self.javac_task.set_run_after(tsk) + + # Instruct protoc where to search for .proto included files. + # For C++ standard include files dirs are used, + # but this doesn't apply to Python for example + for incpath in getattr(self, 'protoc_includes', []): + incdirs.append(self.path.find_node(incpath).bldpath()) + tsk.env.PROTOC_INCPATHS = incdirs + + # PR2115: protoc generates output of .proto files in nested + # directories by canonicalizing paths. To avoid this we have to pass + # as first include the full directory file of the .proto file + tsk.env.prepend_value('INCPATHS', node.parent.bldpath()) + + 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.start_msg('Checking for protoc version') + protocver = conf.cmd_and_log(conf.env.PROTOC + ['--version'], output=Context.BOTH) + protocver = ''.join(protocver).strip()[protocver[0].rfind(' ')+1:] + conf.end_msg(protocver) + conf.env.PROTOC_MAJOR = protocver[:protocver.find('.')] + conf.env.PROTOC_ST = '-I%s' + conf.env.PROTOC_FL = '%s' -- cgit v1.2.1