summaryrefslogtreecommitdiffstats
path: root/Lib/compileall.py
blob: 3755e76ba813f5b699c20307453a2fd1cd539287 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
"""Module/script to byte-compile all .py files to .pyc files.

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
import filecmp

from functools import partial
from pathlib import Path

__all__ = ["compile_dir","compile_file","compile_path"]

def _walk_dir(dir, maxlevels, 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 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, maxlevels=maxlevels - 1,
                                 quiet=quiet)

def compile_dir(dir, maxlevels=None, ddir=None, force=False,
                rx=None, quiet=0, legacy=False, optimize=-1, workers=1,
                invalidation_mode=None, *, stripdir=None,
                prependdir=None, limit_sl_dest=None, hardlink_dupes=False):
    """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 `sys.getrecursionlimit()`)
    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:  int or list of optimization levels or -1 for level of
               the interpreter. Multiple levels leads to multiple compiled
               files each with one optimization level.
    workers:   maximum number of parallel workers
    invalidation_mode: how the up-to-dateness of the pyc will be checked
    stripdir:  part of path to left-strip from source file path
    prependdir: path to prepend to beginning of original file path, applied
               after stripdir
    limit_sl_dest: ignore symlinks if they are pointing outside of
                   the defined path
    hardlink_dupes: hardlink duplicated pyc files
    """
    ProcessPoolExecutor = None
    if ddir is not None and (stripdir is not None or prependdir is not None):
        raise ValueError(("Destination dir (ddir) cannot be used "
                          "in combination with stripdir or prependdir"))
    if ddir is not None:
        stripdir = dir
        prependdir = ddir
        ddir = None
    if workers < 0:
        raise ValueError('workers must be greater or equal to 0')
    if workers != 1:
        # Check if this is a system where ProcessPoolExecutor can function.
        from concurrent.futures.process import _check_system_limits
        try:
            _check_system_limits()
        except NotImplementedError:
            workers = 1
        else:
            from concurrent.futures import ProcessPoolExecutor
    if maxlevels is None:
        maxlevels = sys.getrecursionlimit()
    files = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels)
    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,
                                           ddir=ddir, force=force,
                                           rx=rx, quiet=quiet,
                                           legacy=legacy,
                                           optimize=optimize,
                                           invalidation_mode=invalidation_mode,
                                           stripdir=stripdir,
                                           prependdir=prependdir,
                                           limit_sl_dest=limit_sl_dest,
                                           hardlink_dupes=hardlink_dupes),
                                   files)
            success = min(results, default=True)
    else:
        for file in files:
            if not compile_file(file, ddir, force, rx, quiet,
                                legacy, optimize, invalidation_mode,
                                stripdir=stripdir, prependdir=prependdir,
                                limit_sl_dest=limit_sl_dest,
                                hardlink_dupes=hardlink_dupes):
                success = False
    return success

def compile_file(fullname, ddir=None, force=False, rx=None, quiet=0,
                 legacy=False, optimize=-1,
                 invalidation_mode=None, *, stripdir=None, prependdir=None,
                 limit_sl_dest=None, hardlink_dupes=False):
    """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:  int or list of optimization levels or -1 for level of
               the interpreter. Multiple levels leads to multiple compiled
               files each with one optimization level.
    invalidation_mode: how the up-to-dateness of the pyc will be checked
    stripdir:  part of path to left-strip from source file path
    prependdir: path to prepend to beginning of original file path, applied
               after stripdir
    limit_sl_dest: ignore symlinks if they are pointing outside of
                   the defined path.
    hardlink_dupes: hardlink duplicated pyc files
    """

    if ddir is not None and (stripdir is not None or prependdir is not None):
        raise ValueError(("Destination dir (ddir) cannot be used "
                          "in combination with stripdir or prependdir"))

    success = True
    if quiet < 2 and isinstance(fullname, os.PathLike):
        fullname = os.fspath(fullname)
    name = os.path.basename(fullname)

    dfile = None

    if ddir is not None:
        dfile = os.path.join(ddir, name)

    if stripdir is not None:
        fullname_parts = fullname.split(os.path.sep)
        stripdir_parts = stripdir.split(os.path.sep)
        ddir_parts = list(fullname_parts)

        for spart, opart in zip(stripdir_parts, fullname_parts):
            if spart == opart:
                ddir_parts.remove(spart)

        dfile = os.path.join(*ddir_parts)

    if prependdir is not None:
        if dfile is None:
            dfile = os.path.join(prependdir, fullname)
        else:
            dfile = os.path.join(prependdir, dfile)

    if isinstance(optimize, int):
        optimize = [optimize]

    # Use set() to remove duplicates.
    # Use sorted() to create pyc files in a deterministic order.
    optimize = sorted(set(optimize))

    if hardlink_dupes and len(optimize) < 2:
        raise ValueError("Hardlinking of duplicated bytecode makes sense "
                          "only for more than one optimization level")

    if rx is not None:
        mo = rx.search(fullname)
        if mo:
            return success

    if limit_sl_dest is not None and os.path.islink(fullname):
        if Path(limit_sl_dest).resolve() not in Path(fullname).resolve().parents:
            return success

    opt_cfiles = {}

    if os.path.isfile(fullname):
        for opt_level in optimize:
            if legacy:
                opt_cfiles[opt_level] = fullname + 'c'
            else:
                if opt_level >= 0:
                    opt = opt_level if opt_level >= 1 else ''
                    cfile = (importlib.util.cache_from_source(
                             fullname, optimization=opt))
                    opt_cfiles[opt_level] = cfile
                else:
                    cfile = importlib.util.cache_from_source(fullname)
                    opt_cfiles[opt_level] = 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 & 0xFFFF_FFFF)
                    for cfile in opt_cfiles.values():
                        with open(cfile, 'rb') as chandle:
                            actual = chandle.read(12)
                        if expect != actual:
                            break
                    else:
                        return success
                except OSError:
                    pass
            if not quiet:
                print('Compiling {!r}...'.format(fullname))
            try:
                for index, opt_level in enumerate(optimize):
                    cfile = opt_cfiles[opt_level]
                    ok = py_compile.compile(fullname, cfile, dfile, True,
                                            optimize=opt_level,
                                            invalidation_mode=invalidation_mode)
                    if index > 0 and hardlink_dupes:
                        previous_cfile = opt_cfiles[optimize[index - 1]]
                        if filecmp.cmp(cfile, previous_cfile, shallow=False):
                            os.unlink(cfile)
                            os.link(previous_cfile, cfile)
            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
                encoding = sys.stdout.encoding or sys.getdefaultencoding()
                msg = err.msg.encode(encoding, errors='backslashreplace').decode(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=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')
    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.'))
    parser.add_argument('-o', action='append', type=int, dest='opt_levels',
                        help=('Optimization levels to run compilation with. '
                              'Default is -1 which uses the optimization level '
                              'of the Python interpreter itself (see -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')

    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, encoding="utf-8")) 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,
                                        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)