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"""Internal rules for building upb."""
load(":upb_proto_library.bzl", "GeneratedSrcs")
def _librule(name):
return name + "_lib"
def _get_real_short_path(file):
# For some reason, files from other archives have short paths that look like:
# ../com_google_protobuf/google/protobuf/descriptor.proto
short_path = file.short_path
if short_path.startswith("../"):
second_slash = short_path.index("/", 3)
short_path = short_path[second_slash + 1:]
return short_path
def _get_real_root(file):
real_short_path = _get_real_short_path(file)
return file.path[:-len(real_short_path) - 1]
def _get_real_roots(files):
roots = {}
for file in files:
real_root = _get_real_root(file)
if real_root:
roots[real_root] = True
return roots.keys()
def lua_cclibrary(name, srcs, hdrs = [], deps = [], luadeps = []):
lib_rule = name + "_lib"
so_rule = "lib" + name + ".so"
so_file = _remove_prefix(name, "lua/") + ".so"
native.cc_library(
name = _librule(name),
hdrs = hdrs,
srcs = srcs,
deps = deps + [_librule(dep) for dep in luadeps] + ["@lua//:liblua_headers"],
)
native.cc_binary(
name = so_rule,
linkshared = True,
deps = [_librule(name)],
linkopts = select({
":darwin": [
"-undefined dynamic_lookup",
],
"//conditions:default": [],
}),
)
native.genrule(
name = name + "_copy",
srcs = [":" + so_rule],
outs = [so_file],
cmd = "cp $< $@",
)
native.filegroup(
name = name,
data = [so_file],
)
def _remove_prefix(str, prefix):
if not str.startswith(prefix):
fail("%s doesn't start with %s" % (str, prefix))
return str[len(prefix):]
def _remove_suffix(str, suffix):
if not str.endswith(suffix):
fail("%s doesn't end with %s" % (str, suffix))
return str[:-len(suffix)]
def lua_library(name, srcs, strip_prefix, luadeps = []):
outs = [_remove_prefix(src, strip_prefix + "/") for src in srcs]
native.genrule(
name = name + "_copy",
srcs = srcs,
outs = outs,
cmd = "cp $(SRCS) $(@D)",
)
native.filegroup(
name = name,
data = outs + luadeps,
)
def make_shell_script(name, contents, out):
contents = contents.replace("$", "$$")
native.genrule(
name = "gen_" + name,
outs = [out],
cmd = "(cat <<'HEREDOC'\n%s\nHEREDOC\n) > $@" % contents,
)
def _lua_binary_or_test(name, luamain, luadeps, rule):
script = name + ".sh"
make_shell_script(
name = "gen_" + name,
out = script,
contents = """
BASE=$(dirname $(rlocation upb/upb_c.so))
export LUA_CPATH="$BASE/?.so"
export LUA_PATH="$BASE/?.lua"
$(rlocation lua/lua) $(rlocation upb/tools/upbc.lua) "$@"
""",
)
rule(
name = name,
srcs = [script],
data = ["@lua//:lua", luamain] + luadeps,
)
def lua_binary(name, luamain, luadeps = []):
_lua_binary_or_test(name, luamain, luadeps, native.sh_binary)
def lua_test(name, luamain, luadeps = []):
_lua_binary_or_test(name, luamain, luadeps, native.sh_test)
def generated_file_staleness_test(name, outs, generated_pattern):
"""Tests that checked-in file(s) match the contents of generated file(s).
The resulting test will verify that all output files exist and have the
correct contents. If the test fails, it can be invoked with --fix to
bring the checked-in files up to date.
Args:
name: Name of the rule.
outs: the checked-in files that are copied from generated files.
generated_pattern: the pattern for transforming each "out" file into a
generated file. For example, if generated_pattern="generated/%s" then
a file foo.txt will look for generated file generated/foo.txt.
"""
script_name = name + ".py"
script_src = "//:tools/staleness_test.py"
# Filter out non-existing rules so Blaze doesn't error out before we even
# run the test.
existing_outs = native.glob(include = outs)
# The file list contains a few extra bits of information at the end.
# These get unpacked by the Config class in staleness_test_lib.py.
file_list = outs + [generated_pattern, native.package_name() or ".", name]
native.genrule(
name = name + "_makescript",
outs = [script_name],
srcs = [script_src],
testonly = 1,
cmd = "cat $(location " + script_src + ") > $@; " +
"sed -i.bak -e 's|INSERT_FILE_LIST_HERE|" + "\\\n ".join(file_list) + "|' $@",
)
native.py_test(
name = name,
srcs = [script_name],
data = existing_outs + [generated_pattern % file for file in outs],
deps = [
"//:staleness_test_lib",
],
)
# upb_amalgamation() rule, with file_list aspect.
SrcList = provider(
fields = {
"srcs": "list of srcs",
"hdrs": "list of hdrs",
},
)
def _file_list_aspect_impl(target, ctx):
if GeneratedSrcs in target:
srcs = target[GeneratedSrcs]
return [SrcList(srcs = srcs.srcs, hdrs = srcs.hdrs)]
srcs = []
hdrs = []
for src in ctx.rule.attr.srcs:
srcs += src.files.to_list()
for hdr in ctx.rule.attr.hdrs:
hdrs += hdr.files.to_list()
for hdr in ctx.rule.attr.textual_hdrs:
hdrs += hdr.files.to_list()
return [SrcList(srcs = srcs, hdrs = hdrs)]
_file_list_aspect = aspect(
implementation = _file_list_aspect_impl,
)
def _upb_amalgamation(ctx):
inputs = []
srcs = []
for lib in ctx.attr.libs:
inputs += lib[SrcList].srcs
inputs += lib[SrcList].hdrs
srcs += [src for src in lib[SrcList].srcs if src.path.endswith("c")]
ctx.actions.run(
inputs = inputs,
outputs = ctx.outputs.outs,
arguments = [ctx.bin_dir.path + "/"] + [f.path for f in srcs] + ["-I" + root for root in _get_real_roots(inputs)],
progress_message = "Making amalgamation",
executable = ctx.executable.amalgamator,
)
return []
upb_amalgamation = rule(
attrs = {
"amalgamator": attr.label(
executable = True,
cfg = "host",
),
"libs": attr.label_list(aspects = [_file_list_aspect]),
"outs": attr.output_list(),
},
implementation = _upb_amalgamation,
)
def licenses(*args):
# No-op (for Google-internal usage).
pass
|
