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When called as a script with arguments, this compiles the directories given as arguments recursively; the -l option prevents it from recursing into directories. Without arguments, if compiles all modules on sys.path, without recursing into subdirectories. (Even though it should do so for packages -- for now, you'll have to deal with packages separately.) See module py_compile for details of the actual byte-compilation. """ import os import sys import importlib.util import py_compile import struct from functools import partial __all__ = ["compile_dir","compile_file","compile_path"] def _walk_dir(dir, ddir=None, maxlevels=10, quiet=0): 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, ddir 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, maxlevels=maxlevels - 1, quiet=quiet) def compile_dir(dir, maxlevels=10, ddir=None, force=False, rx=None, quiet=0, legacy=False, optimize=-1, workers=1, invalidation_mode=None): """Byte-compile all modules in the given directory tree. Arguments (only dir is required): dir: the directory to byte-compile maxlevels: maximum recursion level (default 10) ddir: the directory that will be prepended to the path to the file as it is compiled into each byte-code file. force: if True, force compilation, even if timestamps are up-to-date quiet: full output with False or 0, errors only with 1, no output with 2 legacy: if True, produce legacy pyc paths instead of PEP 3147 paths optimize: optimization level or -1 for level of the interpreter workers: maximum number of parallel workers invalidation_mode: how the up-to-dateness of the pyc will be checked """ ProcessPoolExecutor = None if workers < 0: raise ValueError('workers must be greater or equal to 0') if workers != 1: try: # Only import when needed, as low resource platforms may # fail to import it from concurrent.futures import ProcessPoolExecutor except ImportError: workers = 1 files_and_ddirs = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels, ddir=ddir) success = True if workers != 1 and ProcessPoolExecutor is not None: # If workers == 0, let ProcessPoolExecutor choose workers = workers or None with ProcessPoolExecutor(max_workers=workers) as executor: results = executor.map( partial(_compile_file_tuple, force=force, rx=rx, quiet=quiet, legacy=legacy, optimize=optimize, invalidation_mode=invalidation_mode, ), files_and_ddirs) success = min(results, default=True) else: for file, dfile in files_and_ddirs: if not compile_file(file, dfile, force, rx, quiet, legacy, optimize, invalidation_mode): success = False return success def _compile_file_tuple(file_and_dfile, **kwargs): """Needs to be toplevel for ProcessPoolExecutor.""" file, dfile = file_and_dfile return compile_file(file, dfile, **kwargs) def compile_file(fullname, ddir=None, force=False, rx=None, quiet=0, legacy=False, optimize=-1, invalidation_mode=None): """Byte-compile one file. Arguments (only fullname is required): fullname: the file to byte-compile ddir: if given, the directory name compiled in to the byte-code file. force: if True, force compilation, even if timestamps are up-to-date quiet: full output with False or 0, errors only with 1, no output with 2 legacy: if True, produce legacy pyc paths instead of PEP 3147 paths optimize: optimization level or -1 for level of the interpreter invalidation_mode: how the up-to-dateness of the pyc will be checked """ 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('<4sll', importlib.util.MAGIC_NUMBER, 0, mtime) with open(cfile, 'rb') as chandle: actual = chandle.read(12) 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, invalidation_mode=invalidation_mode) 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 return success def compile_path(skip_curdir=1, maxlevels=0, force=False, quiet=0, legacy=False, optimize=-1, invalidation_mode=None): """Byte-compile all module on sys.path. Arguments (all optional): skip_curdir: if true, skip current directory (default True) maxlevels: max recursion level (default 0) force: as for compile_dir() (default False) quiet: as for compile_dir() (default 0) legacy: as for compile_dir() (default False) optimize: as for compile_dir() (default -1) invalidation_mode: as for compiler_dir() """ 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, invalidation_mode=invalidation_mode, ) return success def main(): """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') 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.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.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): 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): 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)