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import argparse
import sys, os
import base64
import hashlib
import tempfile
import shutil
import subprocess
from collections import namedtuple
from unittest.mock import patch
def call(cmd, cwd=None, env=None):
return subprocess.check_output(cmd, stdin=None, stderr=sys.stderr, cwd=cwd, env=env)
class LLVMResourceInserter:
def __init__(self, args, obj_output):
self.cxx = args.compiler
self.objcopy = args.objcopy
self.rescompiler = args.rescompiler
self.compressor = args.compressor
self.obj_out = obj_output
has_target = args.target or args.target != '__unknown_target__'
self.target_flags = [f"--target={args.target}"] if has_target else []
seed = os.path.basename(obj_output)
self.mangler = lambda key: 'R' + hashlib.sha256((seed + key).encode()).hexdigest()
self.tmpdir = tempfile.mkdtemp()
def __enter__(self):
return self
def __exit__(self, *_):
shutil.rmtree(self.tmpdir)
PackedArgs = namedtuple("PackedArgs", ["infile_path", "comressed_file_path", "symbol_name"])
def _insert_files(self, infos: list[PackedArgs], output_obj: str) -> None:
if len(infos) == 0:
return
# Compress resources
cmd = [self.compressor, "--compress-only"]
for inserted_file, compressed_file, _ in infos:
cmd.extend([inserted_file, compressed_file])
call(cmd)
# Put resources into .o file
infos = [(zipped_file, os.path.getsize(zipped_file), symbol_name) for (_, zipped_file, symbol_name) in infos]
cmd = [self.objcopy]
# NOTE: objcopy does not distinguish the order of arguments.
for fname, fsize, sym in infos:
section_name = f'.rodata.{sym}'
cmd.extend(
[
f'--add-section={section_name}={fname}',
f'--set-section-flags={section_name}=readonly',
f'--add-symbol={sym}={section_name}:0,global',
f'--add-symbol={sym}_end={section_name}:{fsize},global',
]
)
cmd.extend([output_obj])
call(cmd)
@staticmethod
def flat_merge_cpp(outs, output):
if len(outs) == 1:
shutil.move(outs[0], output)
return
with open(output, 'w') as fout:
for fname in outs:
with open(fname, 'r') as fin:
shutil.copyfileobj(fin, fout)
return
def insert_resources(self, kv_files, kv_strings):
kv_files = list(kv_files)
def tmp_file_generator():
idx = 0
base = os.path.basename(self.obj_out)
while True:
yield f'{base}_{str(idx)}'
idx += 1
# Generate resource registration cpp code & compile it
with patch.object(tempfile, "_get_candidate_names", tmp_file_generator), tempfile.NamedTemporaryFile(
suffix='.cc'
) as dummy_src:
cmd = [self.rescompiler, dummy_src.name, '--use-sections']
for path, key in kv_files + list(('-', k) for k in kv_strings):
if path != '-':
path = self.mangler(key)
cmd.extend([path, key])
call(cmd)
# Compile
call([self.cxx, dummy_src.name, *self.target_flags, '-c', '-o', self.obj_out])
# Put files
infos = [[]]
estimated_cmd_len = 0
LIMIT = 6000
for idx, (path, key) in enumerate(kv_files):
packed_args = (path, os.path.join(self.tmpdir, f'{idx}.zstd'), self.mangler(key))
infos[-1].append(packed_args)
estimated_cmd_len += len(path)
if estimated_cmd_len > LIMIT:
infos.append([])
estimated_cmd_len = 0
for packed_args in infos:
self._insert_files(packed_args, self.obj_out)
return self.obj_out
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument('--compiler', required=True)
parser.add_argument('--objcopy', required=True)
parser.add_argument('--compressor', required=True)
parser.add_argument('--rescompiler', required=True)
parser.add_argument('--output_obj', required=True)
parser.add_argument('--inputs', nargs='+', required=False, default=[])
parser.add_argument('--keys', nargs='+', required=False, default=[])
parser.add_argument('--kvs', nargs='+', required=False, default=[])
parser.add_argument('--target', required=True)
args = parser.parse_args()
# Decode hex to original string
args.keys = list(base64.b64decode(it).decode("utf-8") for it in args.keys)
return args, args.inputs, args.keys
def main():
args, inputs, keys = parse_args()
with LLVMResourceInserter(args, args.output_obj) as inserter:
inserter.insert_resources(zip(inputs, keys), args.kvs)
return
if __name__ == '__main__':
main()
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