src/link_assembly_files.py

#!/usr/bin/env python3

#   Copyright 2015 WebAssembly Community Group participants
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

import argparse
import glob
import os
import os.path
import sys

import testing


def create_outname(outdir, infile, extras):
    """Create the output file's name."""
    basename = os.path.basename(infile)
    outname = basename + '.wasm'
    return os.path.join(outdir, outname)


def link(infile, outfile, extras):
    """Create the command-line for a linker invocation."""
    linker = extras['linker']
    install_root = os.path.dirname(os.path.dirname(linker))
    sysroot_dir = os.path.join(install_root, 'sysroot')
    command = [
        linker,
        '--sysroot=%s' % sysroot_dir, '-Wl,-zstack-size=1048576', '-o',
        outfile, infile, '-lwasi-emulated-mman', '-lwasi-emulated-signal'
    ]
    return command + extras['args']


def run(linker, files, fails, attributes, out, args):
    """Link all files."""
    assert os.path.isfile(linker), 'Cannot find linker at %s' % linker
    assert os.path.isdir(out), 'Cannot find outdir %s' % out
    input_files = glob.glob(files)
    if len(input_files) == 0:
        print('No files found by %s' % files)
        return 1
    if not args:
        args = []
    return testing.execute(tester=testing.Tester(command_ctor=link,
                                                 outname_ctor=create_outname,
                                                 outdir=out,
                                                 extras={
                                                     'linker': linker,
                                                     'args': args
                                                 }),
                           inputs=input_files,
                           fails=fails,
                           attributes=attributes)


def main():
    parser = argparse.ArgumentParser(description='Link .o files into a .wasm.')
    parser.add_argument('--linker', type=str, required=True,
                        help='Linker path')
    parser.add_argument('--files', type=str, required=True,
                        help='Glob pattern for .s files')
    parser.add_argument('--fails', type=str, required=True,
                        help='Expected failures')
    parser.add_argument('--out', type=str, required=True,
                        help='Output directory')
    args = parser.parse_args()
    return run(args.linker, args.files, args.fails, args.out)


if __name__ == '__main__':
    sys.exit(main())