| # Copyright 2013 The Emscripten Authors. All rights reserved. |
| # Emscripten is available under two separate licenses, the MIT license and the |
| # University of Illinois/NCSA Open Source License. Both these licenses can be |
| # found in the LICENSE file. |
| |
| import logging |
| import os |
| import shlex |
| import tempfile |
| from .utils import WINDOWS |
| |
| |
| DEBUG = int(os.environ.get('EMCC_DEBUG', '0')) |
| |
| |
| def create_response_file(args, directory): |
| """Routes the given cmdline param list in args into a new response file and |
| returns the filename to it. |
| |
| The returned filename has a suffix '.rsp'. |
| """ |
| response_fd, response_filename = tempfile.mkstemp(prefix='emscripten_', suffix='.rsp', dir=directory, text=True) |
| |
| # Backslashes and other special chars need to be escaped in the response file. |
| escape_chars = ['\\', '\"'] |
| # When calling llvm-ar on Linux and macOS, single quote characters ' should be escaped. |
| if not WINDOWS: |
| escape_chars += ['\''] |
| |
| def escape(arg): |
| for char in escape_chars: |
| arg = arg.replace(char, '\\' + char) |
| return arg |
| |
| args = [escape(a) for a in args] |
| contents = "" |
| |
| # Arguments containing spaces need to be quoted. |
| for arg in args: |
| if ' ' in arg: |
| arg = '"%s"' % arg |
| contents += arg + '\n' |
| |
| # When writing windows repsonse files force the encoding to UTF8 which we know |
| # that llvm tools understand. Without this, we get whatever the default codepage |
| # might be. |
| # See: https://github.com/llvm/llvm-project/blob/3f3d1c901d7abcc5b91468335679b1b27d8a02dd/llvm/include/llvm/Support/Program.h#L168-L170 |
| # And: https://github.com/llvm/llvm-project/blob/63d16d06f5b8f71382033b5ea4aa668f8150817a/clang/include/clang/Driver/Job.h#L58-L69 |
| # TODO(sbc): Should we also force utf-8 on non-windows? |
| if WINDOWS: |
| encoding = 'utf-8' |
| else: |
| encoding = None |
| |
| with os.fdopen(response_fd, 'w', encoding=encoding) as f: |
| f.write(contents) |
| |
| if DEBUG: |
| logging.warning('Creating response file ' + response_filename + ' with following contents: ' + contents) |
| |
| # Register the created .rsp file to be automatically cleaned up once this |
| # process finishes, so that caller does not have to remember to do it. |
| from . import shared |
| shared.configuration.get_temp_files().note(response_filename) |
| |
| return response_filename |
| |
| |
| def read_response_file(response_filename): |
| """Reads a response file, and returns the list of cmdline params found in the |
| file. |
| |
| The parameter response_filename may start with '@'.""" |
| if response_filename.startswith('@'): |
| response_filename = response_filename[1:] |
| |
| if not os.path.exists(response_filename): |
| raise IOError("response file not found: %s" % response_filename) |
| |
| with open(response_filename) as f: |
| args = f.read() |
| args = shlex.split(args) |
| |
| if DEBUG: |
| logging.warning('Read response file ' + response_filename + ': ' + str(args)) |
| |
| return args |
| |
| |
| def substitute_response_files(args): |
| """Substitute any response files found in args with their contents.""" |
| new_args = [] |
| for arg in args: |
| if arg.startswith('@'): |
| new_args += read_response_file(arg) |
| elif arg.startswith('-Wl,@'): |
| for a in read_response_file(arg[5:]): |
| if a.startswith('-'): |
| a = '-Wl,' + a |
| new_args.append(a) |
| else: |
| new_args.append(arg) |
| return new_args |