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Merge branch 'protoc_gen_java_poc' into 'master'
protoc: simplify the java generation also solving problems with .proto input files generated during build See merge request ita1024/waf!2209
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ita1024
commit
389e2e4a4b
14
playground/protoc_gen_java/proto.source
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14
playground/protoc_gen_java/proto.source
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@ -0,0 +1,14 @@
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package udp.tc.tests;
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option java_package = "com.udp.tc.tests";
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option java_outer_classname = "MessageInc";
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option cc_generic_services = false;
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option java_generic_services = false;
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option py_generic_services = false;
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message IncludeMe {
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required int32 test = 1;
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optional uint32 blah = 2;
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optional uint32 justinc = 3;
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}
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51
playground/protoc_gen_java/wscript
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51
playground/protoc_gen_java/wscript
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@ -0,0 +1,51 @@
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#! /usr/bin/env python
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# encoding: utf-8
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# Federico Pellegrin, 2019 (fedepell)
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import os
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from waflib import Logs
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top = '.'
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out = 'build'
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def options(opt):
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opt.load('compiler_cxx java')
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def configure(conf):
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conf.load('compiler_cxx java protoc')
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# Here you have to point to your protobuf-java JAR
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conf.env.CLASSPATH_PROTOBUF = ['/usr/share/maven-repo/com/google/protobuf/protobuf-java/3.0.0/protobuf-java-3.0.0.jar']
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def build(bld):
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# this simulates a .proto generator. the gen.proto is generated in build
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genp = bld(
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rule = "cp ${SRC} ${TGT}",
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source = "proto.source",
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target = "inc/gen.proto"
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)
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# cxx doesn't have a problem with this, just knows gen.proto will pop up later
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bld(
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features = 'cxx cxxshlib',
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source = [ bld.path.find_or_declare(genp.target) ],
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name = 'somelib',
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target = 'somelib'
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)
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# but for java:
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# we either put grouping because of protoc java generations needs .proto to generate out fname (#2218)
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# or accept that java dep is not strict on the .java file name (but relies just on explicit task ordering)
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# bld.add_group()
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# inc/gen.proto is an implicit dependency, but the file is generated at
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# build time while protoc extra uses it before to determine the .java file
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# name that will get generated
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bld(
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features = 'javac protoc',
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name = 'pbjava',
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srcdir = bld.path.find_or_declare(genp.target).parent,
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source = [ bld.path.find_or_declare(genp.target) ],
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use = 'PROTOBUF',
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)
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@ -6,7 +6,7 @@
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import re, os
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from waflib.Task import Task
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from waflib.TaskGen import extension
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from waflib import Errors, Context
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from waflib import Errors, Context, Logs
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"""
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A simple tool to integrate protocol buffers into your build system.
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@ -169,64 +169,12 @@ def process_protoc(self, node):
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out_nodes.append(py_node)
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protoc_flags.append('--python_out=%s' % node.parent.get_bld().bldpath())
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if 'javac' in self.features and node.exists():
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pkgname, javapkg, javacn, nodename = None, None, None, None
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messages = []
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# .java file name is done with some rules depending on .proto file content:
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# -) package is either derived from option java_package if present
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# or from package directive
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# -) file name is either derived from option java_outer_classname if present
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# or the .proto file is converted to camelcase. If a message
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# is named the same then the behaviour depends on protoc version
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#
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# See also: https://developers.google.com/protocol-buffers/docs/reference/java-generated#invocation
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code = node.read().splitlines()
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for line in code:
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m = re.search(r'^package\s+(.*);', line)
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if m:
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pkgname = m.groups()[0]
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m = re.search(r'^option\s+(\S*)\s*=\s*"(\S*)";', line)
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if m:
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optname = m.groups()[0]
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if optname == 'java_package':
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javapkg = m.groups()[1]
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elif optname == 'java_outer_classname':
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javacn = m.groups()[1]
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if self.env.PROTOC_MAJOR > '2':
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m = re.search(r'^message\s+(\w*)\s*{*', line)
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if m:
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messages.append(m.groups()[0])
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if javapkg:
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nodename = javapkg
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elif pkgname:
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nodename = pkgname
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else:
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raise Errors.WafError('Cannot derive java name from protoc file')
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nodename = nodename.replace('.',os.sep) + os.sep
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if javacn:
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nodename += javacn + '.java'
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else:
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filenamebase = node.abspath()[node.abspath().rfind(os.sep)+1:node.abspath().rfind('.')].replace('_','')
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filenamebase = filenamebase[:1].upper() + filenamebase[1:]
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if self.env.PROTOC_MAJOR > '2' and node.abspath()[node.abspath().rfind(os.sep)+1:node.abspath().rfind('.')].title() in messages:
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nodename += filenamebase + 'OuterClass.java'
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else:
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nodename += filenamebase + '.java'
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java_node = node.parent.find_or_declare(nodename)
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out_nodes.append(java_node)
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protoc_flags.append('--java_out=%s' % node.parent.get_bld().bldpath())
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if 'javac' in self.features:
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# Make javac get also pick java code generated in build
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if not node.parent.get_bld() in self.javac_task.srcdir:
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self.javac_task.srcdir.append(node.parent.get_bld())
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if not out_nodes and node.exists():
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raise Errors.WafError('Feature %r not supported by protoc extra' % self.features)
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protoc_flags.append('--java_out=%s' % node.parent.get_bld().bldpath())
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tsk = self.create_task('protoc', node, out_nodes)
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tsk.env.append_value('PROTOC_FLAGS', protoc_flags)
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