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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import argparse
import os
import re
import sys
import mozpack.path as mozpath
from buildconfig import topobjdir, topsrcdir
from mozbuild.backend.configenvironment import PartialConfigEnvironment
def process_define_file(output, input):
"""Creates the given config header. A config header is generated by
taking the corresponding source file and replacing some *#define/#undef*
occurences:
- "#undef NAME" is turned into "#define NAME VALUE"
- "#define NAME" is unchanged
- "#define NAME ORIGINAL_VALUE" is turned into "#define NAME VALUE"
- "#undef UNKNOWN_NAME" is turned into "/* #undef UNKNOWN_NAME */"
- Whitespaces are preserved.
As a special rule, "#undef ALLDEFINES" is turned into "#define NAME
VALUE" for all the defined variables.
"""
path = os.path.abspath(input)
config = PartialConfigEnvironment(topobjdir)
if mozpath.basedir(
path, [mozpath.join(topsrcdir, "js/src")]
) and not config.substs.get("JS_STANDALONE"):
config = PartialConfigEnvironment(mozpath.join(topobjdir, "js", "src"))
with open(path, "r") as input:
r = re.compile(
"^\s*#\s*(?P<cmd>[a-z]+)(?:\s+(?P<name>\S+)(?:\s+(?P<value>\S+))?)?", re.U
)
for l in input:
m = r.match(l)
if m:
cmd = m.group("cmd")
name = m.group("name")
value = m.group("value")
if name:
if name == "ALLDEFINES":
if cmd == "define":
raise Exception(
"`#define ALLDEFINES` is not allowed in a "
"CONFIGURE_DEFINE_FILE"
)
def define_for_name(name, val):
"""WebRTC files like to define WINVER and _WIN32_WINNT
via the command line, which raises a mass of macro
redefinition warnings. Just handle those macros
specially here."""
define = "#define {name} {val}".format(name=name, val=val)
if name in ("_WIN32_IE", "_WIN32_WINNT", "WIN32", "WINVER"):
return "#if !defined({name})\n{define}\n#endif".format(
name=name, define=define
)
return define
defines = "\n".join(
sorted(
define_for_name(name, val)
for name, val in config.defines["ALLDEFINES"].items()
)
)
l = l[: m.start("cmd") - 1] + defines + l[m.end("name") :]
elif cmd == "define":
if value and name in config.defines:
l = (
l[: m.start("value")]
+ str(config.defines[name])
+ l[m.end("value") :]
)
elif cmd == "undef":
if name in config.defines:
l = (
l[: m.start("cmd")]
+ "define"
+ l[m.end("cmd") : m.end("name")]
+ " "
+ str(config.defines[name])
+ l[m.end("name") :]
)
else:
l = "/* " + l[: m.end("name")] + " */" + l[m.end("name") :]
output.write(l)
deps = {path}
deps.update(config.get_dependencies())
return deps
def main(argv):
parser = argparse.ArgumentParser(description="Process define files.")
parser.add_argument("input", help="Input define file.")
args = parser.parse_args(argv)
return process_define_file(sys.stdout, args.input)
if __name__ == "__main__":
sys.exit(main(sys.argv[1:]))
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