1# Copyright (c) 2009-2021, Google LLC 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are met: 6# * Redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer. 8# * Redistributions in binary form must reproduce the above copyright 9# notice, this list of conditions and the following disclaimer in the 10# documentation and/or other materials provided with the distribution. 11# * Neither the name of Google LLC nor the 12# names of its contributors may be used to endorse or promote products 13# derived from this software without specific prior written permission. 14# 15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18# DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY 19# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 22# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 26"""Internal rules for building upb.""" 27 28load(":upb_proto_library.bzl", "GeneratedSrcsInfo") 29 30# upb_amalgamation() rule, with file_list aspect. 31 32SrcList = provider( 33 fields = { 34 "srcs": "list of srcs", 35 }, 36) 37 38def _file_list_aspect_impl(target, ctx): 39 if GeneratedSrcsInfo in target: 40 srcs = target[GeneratedSrcsInfo] 41 return [SrcList(srcs = srcs.srcs + srcs.hdrs)] 42 43 srcs = [] 44 for src in ctx.rule.attr.srcs: 45 srcs += src.files.to_list() 46 for hdr in ctx.rule.attr.hdrs: 47 srcs += hdr.files.to_list() 48 for hdr in ctx.rule.attr.textual_hdrs: 49 srcs += hdr.files.to_list() 50 return [SrcList(srcs = srcs)] 51 52_file_list_aspect = aspect( 53 implementation = _file_list_aspect_impl, 54) 55 56def _upb_amalgamation(ctx): 57 inputs = [] 58 for lib in ctx.attr.libs: 59 inputs += lib[SrcList].srcs 60 srcs = [src for src in inputs if not src.path.endswith("hpp")] 61 ctx.actions.run( 62 inputs = inputs, 63 outputs = ctx.outputs.outs, 64 arguments = [f.path for f in ctx.outputs.outs] + [f.path for f in srcs], 65 progress_message = "Making amalgamation", 66 executable = ctx.executable._amalgamator, 67 ) 68 return [] 69 70upb_amalgamation = rule( 71 attrs = { 72 "_amalgamator": attr.label( 73 executable = True, 74 cfg = "exec", 75 default = "//bazel:amalgamate", 76 ), 77 "prefix": attr.string( 78 default = "", 79 ), 80 "libs": attr.label_list(aspects = [_file_list_aspect]), 81 "outs": attr.output_list(), 82 "strip_import_prefix": attr.string_list(), 83 }, 84 implementation = _upb_amalgamation, 85) 86