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516 lines
22 KiB
516 lines
22 KiB
2 weeks ago
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"""Module/script to byte-compile all .py files to .pyc files.
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When called as a script with arguments, this compiles the directories
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given as arguments recursively; the -l option prevents it from
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recursing into directories.
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Without arguments, if compiles all modules on sys.path, without
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recursing into subdirectories. (Even though it should do so for
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packages -- for now, you'll have to deal with packages separately.)
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See module py_compile for details of the actual byte-compilation.
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License:
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Compileall2 is an enhanced copy of Python's compileall module
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and it follows Python licensing. For more info see: https://www.python.org/psf/license/
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"""
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import os
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import sys
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import importlib.util
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import py_compile
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import struct
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import filecmp
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from functools import partial
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from pathlib import Path
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# Python 3.7 and higher
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PY37 = sys.version_info[0:2] >= (3, 7)
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# Python 3.6 and higher
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PY36 = sys.version_info[0:2] >= (3, 6)
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# Python 3.5 and higher
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PY35 = sys.version_info[0:2] >= (3, 5)
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# Python 3.7 and above has a different structure and length
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# of pyc files header. Also, multiple ways how to invalidate pyc file was
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# introduced in Python 3.7. These cases are covered by variables here or by PY37
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# variable itself.
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if PY37:
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pyc_struct_format = '<4sll'
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pyc_header_lenght = 12
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pyc_header_format = (pyc_struct_format, importlib.util.MAGIC_NUMBER, 0)
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else:
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pyc_struct_format = '<4sl'
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pyc_header_lenght = 8
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pyc_header_format = (pyc_struct_format, importlib.util.MAGIC_NUMBER)
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__all__ = ["compile_dir","compile_file","compile_path"]
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def optimization_kwarg(opt):
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"""Returns opt as a dictionary {optimization: opt} for use as **kwarg
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for Python >= 3.5 and empty dictionary for Python 3.4"""
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if PY35:
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return dict(optimization=opt)
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else:
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# `debug_override` is a way how to enable optimized byte-compiled files
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# (.pyo) in Python <= 3.4
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if opt:
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return dict(debug_override=False)
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else:
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return dict()
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def _walk_dir(dir, maxlevels, quiet=0):
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if PY36 and quiet < 2 and isinstance(dir, os.PathLike):
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dir = os.fspath(dir)
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else:
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dir = str(dir)
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if not quiet:
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print('Listing {!r}...'.format(dir))
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try:
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names = os.listdir(dir)
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except OSError:
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if quiet < 2:
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print("Can't list {!r}".format(dir))
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names = []
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names.sort()
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for name in names:
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if name == '__pycache__':
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continue
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fullname = os.path.join(dir, name)
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if not os.path.isdir(fullname):
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yield fullname
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elif (maxlevels > 0 and name != os.curdir and name != os.pardir and
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os.path.isdir(fullname) and not os.path.islink(fullname)):
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yield from _walk_dir(fullname, maxlevels=maxlevels - 1,
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quiet=quiet)
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def compile_dir(dir, maxlevels=None, ddir=None, force=False,
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rx=None, quiet=0, legacy=False, optimize=-1, workers=1,
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invalidation_mode=None, stripdir=None,
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prependdir=None, limit_sl_dest=None, hardlink_dupes=False):
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"""Byte-compile all modules in the given directory tree.
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Arguments (only dir is required):
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dir: the directory to byte-compile
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maxlevels: maximum recursion level (default `sys.getrecursionlimit()`)
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ddir: the directory that will be prepended to the path to the
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file as it is compiled into each byte-code file.
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force: if True, force compilation, even if timestamps are up-to-date
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quiet: full output with False or 0, errors only with 1,
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no output with 2
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legacy: if True, produce legacy pyc paths instead of PEP 3147 paths
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optimize: int or list of optimization levels or -1 for level of
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the interpreter. Multiple levels leads to multiple compiled
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files each with one optimization level.
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workers: maximum number of parallel workers
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invalidation_mode: how the up-to-dateness of the pyc will be checked
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stripdir: part of path to left-strip from source file path
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prependdir: path to prepend to beggining of original file path, applied
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after stripdir
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limit_sl_dest: ignore symlinks if they are pointing outside of
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the defined path
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hardlink_dupes: hardlink duplicated pyc files
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"""
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ProcessPoolExecutor = None
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if ddir is not None and (stripdir is not None or prependdir is not None):
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raise ValueError(("Destination dir (ddir) cannot be used "
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"in combination with stripdir or prependdir"))
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if ddir is not None:
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stripdir = dir
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prependdir = ddir
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ddir = None
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if workers is not None:
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if workers < 0:
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raise ValueError('workers must be greater or equal to 0')
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elif workers != 1:
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try:
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# Only import when needed, as low resource platforms may
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# fail to import it
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from concurrent.futures import ProcessPoolExecutor
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except ImportError:
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workers = 1
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if maxlevels is None:
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maxlevels = sys.getrecursionlimit()
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files = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels)
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success = True
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if workers is not None and workers != 1 and ProcessPoolExecutor is not None:
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workers = workers or None
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with ProcessPoolExecutor(max_workers=workers) as executor:
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results = executor.map(partial(compile_file,
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ddir=ddir, force=force,
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rx=rx, quiet=quiet,
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legacy=legacy,
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optimize=optimize,
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invalidation_mode=invalidation_mode,
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stripdir=stripdir,
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prependdir=prependdir,
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limit_sl_dest=limit_sl_dest),
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files)
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success = min(results, default=True)
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else:
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for file in files:
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if not compile_file(file, ddir, force, rx, quiet,
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legacy, optimize, invalidation_mode,
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stripdir=stripdir, prependdir=prependdir,
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limit_sl_dest=limit_sl_dest,
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hardlink_dupes=hardlink_dupes):
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success = False
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return success
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def compile_file(fullname, ddir=None, force=False, rx=None, quiet=0,
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legacy=False, optimize=-1,
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invalidation_mode=None, stripdir=None, prependdir=None,
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limit_sl_dest=None, hardlink_dupes=False):
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"""Byte-compile one file.
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Arguments (only fullname is required):
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fullname: the file to byte-compile
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ddir: if given, the directory name compiled in to the
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byte-code file.
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force: if True, force compilation, even if timestamps are up-to-date
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quiet: full output with False or 0, errors only with 1,
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no output with 2
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legacy: if True, produce legacy pyc paths instead of PEP 3147 paths
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optimize: int or list of optimization levels or -1 for level of
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the interpreter. Multiple levels leads to multiple compiled
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files each with one optimization level.
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invalidation_mode: how the up-to-dateness of the pyc will be checked
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stripdir: part of path to left-strip from source file path
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prependdir: path to prepend to beggining of original file path, applied
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after stripdir
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limit_sl_dest: ignore symlinks if they are pointing outside of
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the defined path.
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hardlink_dupes: hardlink duplicated pyc files
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"""
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if ddir is not None and (stripdir is not None or prependdir is not None):
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raise ValueError(("Destination dir (ddir) cannot be used "
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"in combination with stripdir or prependdir"))
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success = True
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if PY36 and quiet < 2 and isinstance(fullname, os.PathLike):
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fullname = os.fspath(fullname)
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else:
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fullname = str(fullname)
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name = os.path.basename(fullname)
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dfile = None
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if ddir is not None:
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if not PY36:
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ddir = str(ddir)
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dfile = os.path.join(ddir, name)
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if stripdir is not None:
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fullname_parts = fullname.split(os.path.sep)
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stripdir_parts = stripdir.split(os.path.sep)
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ddir_parts = list(fullname_parts)
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for spart, opart in zip(stripdir_parts, fullname_parts):
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if spart == opart:
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ddir_parts.remove(spart)
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dfile = os.path.join(*ddir_parts)
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if prependdir is not None:
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if dfile is None:
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dfile = os.path.join(prependdir, fullname)
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else:
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dfile = os.path.join(prependdir, dfile)
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if isinstance(optimize, int):
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optimize = [optimize]
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if hardlink_dupes:
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raise ValueError(("Hardlinking of duplicated bytecode makes sense "
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"only for more than one optimization level."))
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if rx is not None:
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mo = rx.search(fullname)
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if mo:
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return success
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if limit_sl_dest is not None and os.path.islink(fullname):
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if Path(limit_sl_dest).resolve() not in Path(fullname).resolve().parents:
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return success
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opt_cfiles = {}
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if os.path.isfile(fullname):
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for opt_level in optimize:
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if legacy:
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opt_cfiles[opt_level] = fullname + 'c'
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else:
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if opt_level >= 0:
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opt = opt_level if opt_level >= 1 else ''
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opt_kwarg = optimization_kwarg(opt)
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cfile = (importlib.util.cache_from_source(
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fullname, **opt_kwarg))
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opt_cfiles[opt_level] = cfile
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else:
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cfile = importlib.util.cache_from_source(fullname)
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opt_cfiles[opt_level] = cfile
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head, tail = name[:-3], name[-3:]
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if tail == '.py':
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if not force:
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try:
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mtime = int(os.stat(fullname).st_mtime)
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expect = struct.pack(*(pyc_header_format + (mtime,)))
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for cfile in opt_cfiles.values():
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with open(cfile, 'rb') as chandle:
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actual = chandle.read(pyc_header_lenght)
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if expect != actual:
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break
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else:
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return success
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except OSError:
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pass
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if not quiet:
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print('Compiling {!r}...'.format(fullname))
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try:
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for index, opt_level in enumerate(sorted(optimize)):
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cfile = opt_cfiles[opt_level]
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if PY37:
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ok = py_compile.compile(fullname, cfile, dfile, True,
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optimize=opt_level,
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invalidation_mode=invalidation_mode)
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else:
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ok = py_compile.compile(fullname, cfile, dfile, True,
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optimize=opt_level)
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if index > 0 and hardlink_dupes:
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previous_cfile = opt_cfiles[optimize[index - 1]]
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if previous_cfile == cfile and optimize[0] not in (1, 2):
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# Python 3.4 has only one .pyo file for -O and -OO so
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# we hardlink it only if there is a .pyc file
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# with the same content
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previous_cfile = opt_cfiles[optimize[0]]
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if previous_cfile != cfile and filecmp.cmp(cfile, previous_cfile, shallow=False):
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os.unlink(cfile)
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os.link(previous_cfile, cfile)
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except py_compile.PyCompileError as err:
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success = False
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if quiet >= 2:
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return success
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elif quiet:
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print('*** Error compiling {!r}...'.format(fullname))
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else:
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print('*** ', end='')
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# escape non-printable characters in msg
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msg = err.msg.encode(sys.stdout.encoding,
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errors='backslashreplace')
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msg = msg.decode(sys.stdout.encoding)
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print(msg)
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except (SyntaxError, UnicodeError, OSError) as e:
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success = False
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if quiet >= 2:
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return success
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elif quiet:
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print('*** Error compiling {!r}...'.format(fullname))
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else:
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print('*** ', end='')
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print(e.__class__.__name__ + ':', e)
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else:
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if ok == 0:
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success = False
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return success
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def compile_path(skip_curdir=1, maxlevels=0, force=False, quiet=0,
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legacy=False, optimize=-1,
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invalidation_mode=None):
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"""Byte-compile all module on sys.path.
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Arguments (all optional):
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skip_curdir: if true, skip current directory (default True)
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maxlevels: max recursion level (default 0)
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force: as for compile_dir() (default False)
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quiet: as for compile_dir() (default 0)
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legacy: as for compile_dir() (default False)
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optimize: as for compile_dir() (default -1)
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invalidation_mode: as for compiler_dir()
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"""
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success = True
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for dir in sys.path:
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if (not dir or dir == os.curdir) and skip_curdir:
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if quiet < 2:
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print('Skipping current directory')
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else:
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success = success and compile_dir(
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dir,
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maxlevels,
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None,
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force,
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quiet=quiet,
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legacy=legacy,
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optimize=optimize,
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invalidation_mode=invalidation_mode,
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)
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return success
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def main():
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"""Script main program."""
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import argparse
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parser = argparse.ArgumentParser(
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description='Utilities to support installing Python libraries.')
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parser.add_argument('-l', action='store_const', const=0,
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|
default=None, 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('-s', metavar='STRIPDIR', dest='stripdir',
|
||
|
|
default=None,
|
||
|
|
help=('part of path to left-strip from path '
|
||
|
|
'to source file - for example buildroot. '
|
||
|
|
'`-d` and `-s` options cannot be '
|
||
|
|
'specified together.'))
|
||
|
|
parser.add_argument('-p', metavar='PREPENDDIR', dest='prependdir',
|
||
|
|
default=None,
|
||
|
|
help=('path to add as prefix to path '
|
||
|
|
'to source file - for example / to make '
|
||
|
|
'it absolute when some part is removed '
|
||
|
|
'by `-s` option. '
|
||
|
|
'`-d` and `-p` options cannot be '
|
||
|
|
'specified together.'))
|
||
|
|
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')
|
||
|
|
parser.add_argument('-o', action='append', type=int, dest='opt_levels',
|
||
|
|
help=('Optimization levels to run compilation with. '
|
||
|
|
'Default is -1 which uses optimization level of '
|
||
|
|
'Python interpreter itself (specified by -O).'))
|
||
|
|
parser.add_argument('-e', metavar='DIR', dest='limit_sl_dest',
|
||
|
|
help='Ignore symlinks pointing outsite of the DIR')
|
||
|
|
parser.add_argument('--hardlink-dupes', action='store_true',
|
||
|
|
dest='hardlink_dupes',
|
||
|
|
help='Hardlink duplicated pyc files')
|
||
|
|
|
||
|
|
if PY37:
|
||
|
|
invalidation_modes = [mode.name.lower().replace('_', '-')
|
||
|
|
for mode in py_compile.PycInvalidationMode]
|
||
|
|
parser.add_argument('--invalidation-mode',
|
||
|
|
choices=sorted(invalidation_modes),
|
||
|
|
help=('set .pyc invalidation mode; defaults to '
|
||
|
|
'"checked-hash" if the SOURCE_DATE_EPOCH '
|
||
|
|
'environment variable is set, and '
|
||
|
|
'"timestamp" otherwise.'))
|
||
|
|
|
||
|
|
args = parser.parse_args()
|
||
|
|
compile_dests = args.compile_dest
|
||
|
|
|
||
|
|
if args.rx:
|
||
|
|
import re
|
||
|
|
args.rx = re.compile(args.rx)
|
||
|
|
|
||
|
|
if args.limit_sl_dest == "":
|
||
|
|
args.limit_sl_dest = None
|
||
|
|
|
||
|
|
if args.recursion is not None:
|
||
|
|
maxlevels = args.recursion
|
||
|
|
else:
|
||
|
|
maxlevels = args.maxlevels
|
||
|
|
|
||
|
|
if args.opt_levels is None:
|
||
|
|
args.opt_levels = [-1]
|
||
|
|
|
||
|
|
if len(args.opt_levels) == 1 and args.hardlink_dupes:
|
||
|
|
parser.error(("Hardlinking of duplicated bytecode makes sense "
|
||
|
|
"only for more than one optimization level."))
|
||
|
|
|
||
|
|
if args.ddir is not None and (
|
||
|
|
args.stripdir is not None or args.prependdir is not None
|
||
|
|
):
|
||
|
|
parser.error("-d cannot be used in combination with -s or -p")
|
||
|
|
|
||
|
|
# 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
|
||
|
|
|
||
|
|
if PY37 and args.invalidation_mode:
|
||
|
|
ivl_mode = args.invalidation_mode.replace('-', '_').upper()
|
||
|
|
invalidation_mode = py_compile.PycInvalidationMode[ivl_mode]
|
||
|
|
else:
|
||
|
|
invalidation_mode = 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,
|
||
|
|
invalidation_mode=invalidation_mode,
|
||
|
|
stripdir=args.stripdir,
|
||
|
|
prependdir=args.prependdir,
|
||
|
|
optimize=args.opt_levels,
|
||
|
|
limit_sl_dest=args.limit_sl_dest,
|
||
|
|
hardlink_dupes=args.hardlink_dupes):
|
||
|
|
success = False
|
||
|
|
else:
|
||
|
|
if not compile_dir(dest, maxlevels, args.ddir,
|
||
|
|
args.force, args.rx, args.quiet,
|
||
|
|
args.legacy, workers=args.workers,
|
||
|
|
invalidation_mode=invalidation_mode,
|
||
|
|
stripdir=args.stripdir,
|
||
|
|
prependdir=args.prependdir,
|
||
|
|
optimize=args.opt_levels,
|
||
|
|
limit_sl_dest=args.limit_sl_dest,
|
||
|
|
hardlink_dupes=args.hardlink_dupes):
|
||
|
|
success = False
|
||
|
|
return success
|
||
|
|
else:
|
||
|
|
return compile_path(legacy=args.legacy, force=args.force,
|
||
|
|
quiet=args.quiet,
|
||
|
|
invalidation_mode=invalidation_mode)
|
||
|
|
except KeyboardInterrupt:
|
||
|
|
if args.quiet < 2:
|
||
|
|
print("\n[interrupted]")
|
||
|
|
return False
|
||
|
|
return True
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
exit_status = int(not main())
|
||
|
|
sys.exit(exit_status)
|