if quiet < 2 and isinstance(dir, os.PathLike):

dir = os.fspath(dir)

if not quiet:

print('Listing {!r}...'.format(dir))

try:

names = os.listdir(dir)

except OSError:

if quiet < 2:

print("Can't list {!r}".format(dir))

names = []

names.sort()

for name in names:

if name == '__pycache__':

continue

fullname = os.path.join(dir, name)

if ddir is not None:

dfile = os.path.join(ddir, name)

else:

dfile = None

if not os.path.isdir(fullname):

yield fullname

elif (maxlevels > 0 and name != os.curdir and name != os.pardir and

os.path.isdir(fullname) and not os.path.islink(fullname)):

yield from _walk_dir(fullname, ddir=dfile,

quiet=0, legacy=False, optimize=-1, workers=1):

"""Byte-compile all modules in the given directory tree.

if workers is not None and workers < 0:

raise ValueError('workers must be greater or equal to 0')

files = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels,

ddir=ddir)

success = True

if workers is not None and workers != 1 and ProcessPoolExecutor is not None:

workers = workers or None

with ProcessPoolExecutor(max_workers=workers) as executor:

results = executor.map(partial(compile_file,

ddir=ddir, force=force,

rx=rx, quiet=quiet,

legacy=legacy,

optimize=optimize),

files)

success = min(results, default=True)

else:

for file in files:

if not compile_file(file, ddir, force, rx, quiet,

legacy, optimize):

success = False

legacy=False, optimize=-1):

"""Byte-compile one file.

success = True

if quiet < 2 and isinstance(fullname, os.PathLike):

fullname = os.fspath(fullname)

name = os.path.basename(fullname)

if ddir is not None:

dfile = os.path.join(ddir, name)

else:

dfile = None

if rx is not None:

mo = rx.search(fullname)

if mo:

return success

if os.path.isfile(fullname):

if legacy:

cfile = fullname + 'c'

else:

if optimize >= 0:

opt = optimize if optimize >= 1 else ''

cfile = importlib.util.cache_from_source(

fullname, optimization=opt)

else:

cfile = importlib.util.cache_from_source(fullname)

cache_dir = os.path.dirname(cfile)

head, tail = name[:-3], name[-3:]

if tail == '.py':

if not force:

try:

mtime = int(os.stat(fullname).st_mtime)

expect = struct.pack('<4sl', importlib.util.MAGIC_NUMBER,

mtime)

with open(cfile, 'rb') as chandle:

actual = chandle.read(8)

if expect == actual:

return success

except OSError:

pass

if not quiet:

print('Compiling {!r}...'.format(fullname))

try:

ok = py_compile.compile(fullname, cfile, dfile, True,

optimize=optimize)

except py_compile.PyCompileError as err:

success = False

if quiet >= 2:

return success

elif quiet:

print('*** Error compiling {!r}...'.format(fullname))

else:

print('*** ', end='')

# escape non-printable characters in msg

msg = err.msg.encode(sys.stdout.encoding,

errors='backslashreplace')

msg = msg.decode(sys.stdout.encoding)

print(msg)

except (SyntaxError, UnicodeError, OSError) as e:

success = False

if quiet >= 2:

return success

elif quiet:

print('*** Error compiling {!r}...'.format(fullname))

else:

print('*** ', end='')

print(e.__class__.__name__ + ':', e)

else:

if ok == 0:

success = False

legacy=False, optimize=-1):

"""Byte-compile all module on sys.path.

success = True

for dir in sys.path:

if (not dir or dir == os.curdir) and skip_curdir:

if quiet < 2:

print('Skipping current directory')

else:

success = success and compile_dir(dir, maxlevels, None,

force, quiet=quiet,

legacy=legacy, optimize=optimize)

"""Script main program."""

import argparse

parser = argparse.ArgumentParser(

description='Utilities to support installing Python libraries.')

parser.add_argument('-l', action='store_const', const=0,

default=10, dest='maxlevels',

help="don't recurse into subdirectories")

parser.add_argument('-r', type=int, dest='recursion',

help=('control the maximum recursion level. '

'if `-l` and `-r` options are specified, '

'then `-r` takes precedence.'))

parser.add_argument('-f', action='store_true', dest='force',

help='force rebuild even if timestamps are up to date')

parser.add_argument('-q', action='count', dest='quiet', default=0,

help='output only error messages; -qq will suppress '

'the error messages as well.')

parser.add_argument('-b', action='store_true', dest='legacy',

help='use legacy (pre-PEP3147) compiled file locations')

parser.add_argument('-d', metavar='DESTDIR', dest='ddir', default=None,

help=('directory to prepend to file paths for use in '

'compile-time tracebacks and in runtime '

'tracebacks in cases where the source file is '

'unavailable'))

parser.add_argument('-x', metavar='REGEXP', dest='rx', default=None,

help=('skip files matching the regular expression; '

'the regexp is searched for in the full path '

'of each file considered for compilation'))

parser.add_argument('-i', metavar='FILE', dest='flist',

help=('add all the files and directories listed in '

'FILE to the list considered for compilation; '

'if "-", names are read from stdin'))

parser.add_argument('compile_dest', metavar='FILE|DIR', nargs='*',

help=('zero or more file and directory names '

'to compile; if no arguments given, defaults '

'to the equivalent of -l sys.path'))

parser.add_argument('-j', '--workers', default=1,

type=int, help='Run compileall concurrently')

args = parser.parse_args()

compile_dests = args.compile_dest

if args.rx:

import re

args.rx = re.compile(args.rx)

if args.recursion is not None:

maxlevels = args.recursion

else:

maxlevels = args.maxlevels

# if flist is provided then load it

if args.flist:

try:

with (sys.stdin if args.flist=='-' else open(args.flist)) as f:

for line in f:

compile_dests.append(line.strip())

except OSError:

if args.quiet < 2:

print("Error reading file list {}".format(args.flist))

return False

if args.workers is not None:

args.workers = args.workers or None

success = True

try:

if compile_dests:

for dest in compile_dests:

if os.path.isfile(dest):

if not compile_file(dest, args.ddir, args.force, args.rx,

args.quiet, args.legacy):

success = False

else:

if not compile_dir(dest, maxlevels, args.ddir,

args.force, args.rx, args.quiet,

args.legacy, workers=args.workers):

success = False

return success

else:

return compile_path(legacy=args.legacy, force=args.force,

quiet=args.quiet)

except KeyboardInterrupt:

if args.quiet < 2:

print("\n[interrupted]")

return False