1# Copyright (c) 2009-2021, Google LLC 2# All rights reserved. 3# 4# Use of this source code is governed by a BSD-style 5# license that can be found in the LICENSE file or at 6# https://developers.google.com/open-source/licenses/bsd 7 8"""Internal rules for building upb.""" 9 10_DEFAULT_CPPOPTS = [] 11_DEFAULT_COPTS = [] 12 13_DEFAULT_CPPOPTS.extend([ 14 "-Wextra", 15 # "-Wshorten-64-to-32", # not in GCC (and my Kokoro images doesn't have Clang) 16 "-Wno-unused-parameter", 17 "-Wno-long-long", 18]) 19_DEFAULT_COPTS.extend([ 20 "-std=c99", 21 "-Wall", 22 "-Wstrict-prototypes", 23 # GCC (at least) emits spurious warnings for this that cannot be fixed 24 # without introducing redundant initialization (with runtime cost): 25 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635 26 #"-Wno-maybe-uninitialized", 27]) 28 29UPB_DEFAULT_CPPOPTS = select({ 30 "//upb:windows": [], 31 "//conditions:default": _DEFAULT_CPPOPTS, 32}) 33 34UPB_DEFAULT_COPTS = select({ 35 "//upb:windows": [], 36 "//upb:fasttable_enabled_setting": ["-std=gnu99", "-DUPB_ENABLE_FASTTABLE"], 37 "//conditions:default": _DEFAULT_COPTS, 38}) 39 40runfiles_init = """\ 41# --- begin runfiles.bash initialization v2 --- 42# Copy-pasted from the Bazel Bash runfiles library v2. 43set -uo pipefail; f=bazel_tools/tools/bash/runfiles/runfiles.bash 44source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \ 45 source "$(grep -sm1 "^$f " "${RUNFILES_MANIFEST_FILE:-/dev/null}" | cut -f2- -d' ')" 2>/dev/null || \ 46 source "$0.runfiles/$f" 2>/dev/null || \ 47 source "$(grep -sm1 "^$f " "$0.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \ 48 source "$(grep -sm1 "^$f " "$0.exe.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \ 49 { echo>&2 "ERROR: cannot find $f"; exit 1; }; f=; set -e 50# --- end runfiles.bash initialization v2 --- 51""" 52 53def _get_real_short_path(file): 54 # For some reason, files from other archives have short paths that look like: 55 # ../com_google_protobuf/google/protobuf/descriptor.proto 56 short_path = file.short_path 57 if short_path.startswith("../"): 58 second_slash = short_path.index("/", 3) 59 short_path = short_path[second_slash + 1:] 60 return short_path 61 62def _get_real_root(file): 63 real_short_path = _get_real_short_path(file) 64 return file.path[:-len(real_short_path) - 1] 65 66def _get_real_roots(files): 67 roots = {} 68 for file in files: 69 real_root = _get_real_root(file) 70 if real_root: 71 roots[real_root] = True 72 return roots.keys() 73 74def make_shell_script(name, contents, out): 75 contents = contents.replace("$", "$$") 76 native.genrule( 77 name = "gen_" + name, 78 outs = [out], 79 cmd = "(cat <<'HEREDOC'\n%s\nHEREDOC\n) > $@" % contents, 80 ) 81