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response_file.py
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86 lines (65 loc) · 2.48 KB
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# 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
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 = ('\\', '\"', '\'')
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'
with os.fdopen(response_fd, 'w') as f:
f.write(contents)
if DEBUG:
logging.warning('Creating response file ' + response_filename + ': ' + 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