cli.py: format

[barectf.git] / barectf / cli.py

# The MIT License (MIT)
#
# Copyright (c) 2014-2020 Philippe Proulx <pproulx@efficios.com>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from pkg_resources import resource_filename
from termcolor import cprint, colored
import barectf.tsdl182gen
import barectf.config
import barectf.gen
import argparse
import os.path
import barectf
import sys
import os
import re


def _perror(msg):
    cprint('Error: ', 'red', end='', file=sys.stderr)
    cprint(msg, 'red', attrs=['bold'], file=sys.stderr)
    sys.exit(1)


def _pconfig_error(exc):
    cprint('Error:', 'red', file=sys.stderr)

    for ctx in reversed(exc.ctx):
        if ctx.msg is not None:
            msg = f' {ctx.msg}'
        else:
            msg = ''

        cprint(f'  {ctx.name}:{msg}', 'red', attrs=['bold'], file=sys.stderr)

    sys.exit(1)


def _psuccess(msg):
    cprint(msg, 'green', attrs=['bold'])


def _parse_args():
    ap = argparse.ArgumentParser()

    ap.add_argument('-c', '--code-dir', metavar='DIR', action='store',
                    default=os.getcwd(),
                    help='output directory of C source file')
    ap.add_argument('--dump-config', action='store_true',
                    help='also dump the effective YAML configuration file used for generation')
    ap.add_argument('-H', '--headers-dir', metavar='DIR', action='store',
                    default=os.getcwd(),
                    help='output directory of C header files')
    ap.add_argument('-I', '--include-dir', metavar='DIR', action='append',
                    default=[],
                    help='add directory DIR to the list of directories to be searched for include files')
    ap.add_argument('--ignore-include-not-found', action='store_true',
                    help='continue to process the configuration file when included files are not found')
    ap.add_argument('-m', '--metadata-dir', metavar='DIR', action='store',
                    default=os.getcwd(),
                    help='output directory of CTF metadata')
    ap.add_argument('-p', '--prefix', metavar='PREFIX', action='store',
                    help='override configuration\'s prefix')
    ap.add_argument('-V', '--version', action='version',
                    version='%(prog)s {}'.format(barectf.__version__))
    ap.add_argument('config', metavar='CONFIG', action='store',
                    help='barectf YAML configuration file')

    # parse args
    args = ap.parse_args()

    # validate output directories
    for d in [args.code_dir, args.headers_dir, args.metadata_dir] + args.include_dir:
        if not os.path.isdir(d):
            _perror(f'`{d}` is not an existing directory')

    # validate that configuration file exists
    if not os.path.isfile(args.config):
        _perror(f'`{args.config}` is not an existing, regular file')

    # append current working directory and provided include directory
    args.include_dir += [os.getcwd(), resource_filename(__name__, 'include')]

    return args


def _write_file(d, name, content):
    with open(os.path.join(d, name), 'w') as f:
        f.write(content)


def run():
    # parse arguments
    args = _parse_args()

    # create configuration
    try:
        config = barectf.config.from_file(args.config, args.include_dir,
                                          args.ignore_include_not_found,
                                          args.dump_config)
    except barectf.config._ConfigParseError as exc:
        _pconfig_error(exc)
    except Exception as exc:
        import traceback

        traceback.print_exc()
        _perror(f'Unknown exception: {exc}')

    # replace prefix if needed
    if args.prefix:
        config = barectf.config.Config(config.metadata, args.prefix,
                                       config.options)

    # generate metadata
    metadata = barectf.tsdl182gen.from_metadata(config.metadata)

    try:
        _write_file(args.metadata_dir, 'metadata', metadata)
    except Exception as exc:
        _perror(f'Cannot write metadata file: {exc}')

    # create generator
    generator = barectf.gen.CCodeGenerator(config)

    # generate C headers
    header = generator.generate_header()
    bitfield_header = generator.generate_bitfield_header()

    try:
        _write_file(args.headers_dir, generator.get_header_filename(), header)
        _write_file(args.headers_dir, generator.get_bitfield_header_filename(),
                    bitfield_header)
    except Exception as exc:
        _perror(f'Cannot write header files: {exc}')

    # generate C source
    c_src = generator.generate_c_src()

    try:
        _write_file(args.code_dir, '{}.c'.format(config.prefix.rstrip('_')),
                    c_src)
    except Exception as exc:
        _perror(f'Cannot write C source file: {exc}')