summaryrefslogtreecommitdiff
path: root/etc/update-copyright.py
blob: 7f605d0583003306c76b75343cafc4ba976383ea (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
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
#!/usr/bin/python
#
# Copyright (C) 2013-2021 Free Software Foundation, Inc.
#
# This script is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.

# This script adjusts the copyright notices at the top of source files
# so that they have the form:
#
#   Copyright XXXX-YYYY Free Software Foundation, Inc.
#
# It doesn't change code that is known to be maintained elsewhere or
# that carries a non-FSF copyright.
#
# Pass --this-year to the script if you want it to add the current year
# to all applicable notices.  Pass --quilt if you are using quilt and
# want files to be added to the quilt before being changed.
#
# By default the script will update all directories for which the
# output has been vetted.  You can instead pass the names of individual
# directories, including those that haven't been approved.  So:
#
#    update-copyright.pl --this-year
#
# is the command that would be used at the beginning of a year to update
# all copyright notices (and possibly at other times to check whether
# new files have been added with old years).  On the other hand:
#
#    update-copyright.pl --this-year libjava
#
# would run the script on just libjava/.
#
# This script was copied from gcc's contrib/ and modified to suit
# binutils.  In contrast to the gcc script, this one will update
# the testsuite and --version output strings too.

import os
import re
import sys
import time
import subprocess

class Errors:
    def __init__ (self):
        self.num_errors = 0

    def report (self, filename, string):
        if filename:
            string = filename + ': ' + string
        sys.stderr.write (string + '\n')
        self.num_errors += 1

    def ok (self):
        return self.num_errors == 0

class GenericFilter:
    def __init__ (self):
        self.skip_files = set()
        self.skip_dirs = set()
        self.skip_extensions = set()
        self.fossilised_files = set()
        self.own_files = set()

        self.skip_files |= set ([
                # Skip licence files.
                'COPYING',
                'COPYING.LIB',
                'COPYING3',
                'COPYING3.LIB',
                'COPYING.LIBGLOSS',
                'COPYING.NEWLIB',
                'LICENSE',
                'fdl.texi',
                'gpl_v3.texi',
                'fdl-1.3.xml',
                'gpl-3.0.xml',

                # Skip auto- and libtool-related files
                'aclocal.m4',
                'compile',
                'config.guess',
                'config.sub',
                'depcomp',
                'install-sh',
                'libtool.m4',
                'ltmain.sh',
                'ltoptions.m4',
                'ltsugar.m4',
                'ltversion.m4',
                'lt~obsolete.m4',
                'missing',
                'mkdep',
                'mkinstalldirs',
                'move-if-change',
                'shlibpath.m4',
                'symlink-tree',
                'ylwrap',

                # Skip FSF mission statement, etc.
                'gnu.texi',
                'funding.texi',
                'appendix_free.xml',

                # Skip imported texinfo files.
                'texinfo.tex',
                ])

        self.skip_extensions |= set ([
                # Maintained by the translation project.
                '.po',

                # Automatically-generated.
                '.pot',
                ])

        self.skip_dirs |= set ([
                'autom4te.cache',
                ])


    def get_line_filter (self, dir, filename):
        if filename.startswith ('ChangeLog'):
            # Ignore references to copyright in changelog entries.
            return re.compile ('\t')

        return None

    def skip_file (self, dir, filename):
        if filename in self.skip_files:
            return True

        (base, extension) = os.path.splitext (os.path.join (dir, filename))
        if extension in self.skip_extensions:
            return True

        if extension == '.in':
            # Skip .in files produced by automake.
            if os.path.exists (base + '.am'):
                return True

            # Skip files produced by autogen
            if (os.path.exists (base + '.def')
                and os.path.exists (base + '.tpl')):
                return True

        # Skip configure files produced by autoconf
        if filename == 'configure':
            if os.path.exists (base + '.ac'):
                return True
            if os.path.exists (base + '.in'):
                return True

        return False

    def skip_dir (self, dir, subdir):
        return subdir in self.skip_dirs

    def is_fossilised_file (self, dir, filename):
        if filename in self.fossilised_files:
            return True
        # Only touch current current ChangeLogs.
        if filename != 'ChangeLog' and filename.find ('ChangeLog') >= 0:
            return True
        return False

    def by_package_author (self, dir, filename):
        return filename in self.own_files

class Copyright:
    def __init__ (self, errors):
        self.errors = errors

        # Characters in a range of years.  Include '.' for typos.
        ranges = '[0-9](?:[-0-9.,\s]|\s+and\s+)*[0-9]'

        # Non-whitespace characters in a copyright holder's name.
        name = '[\w.,-]'

        # Matches one year.
        self.year_re = re.compile ('[0-9]+')

        # Matches part of a year or copyright holder.
        self.continuation_re = re.compile (ranges + '|' + name)

        # Matches a full copyright notice:
        self.copyright_re = re.compile (
            # 1: 'Copyright (C)', etc.
            '([Cc]opyright'
            '|[Cc]opyright\s+\([Cc]\)'
            '|[Cc]opyright\s+%s'
            '|[Cc]opyright\s+©'
            '|[Cc]opyright\s+@copyright{}'
            '|@set\s+copyright[\w-]+)'

            # 2: the years.  Include the whitespace in the year, so that
            # we can remove any excess.
            '(\s*(?:' + ranges + ',?'
            '|@value\{[^{}]*\})\s*)'

            # 3: 'by ', if used
            '(by\s+)?'

            # 4: the copyright holder.  Don't allow multiple consecutive
            # spaces, so that right-margin gloss doesn't get caught
            # (e.g. gnat_ugn.texi).
            '(' + name + '(?:\s?' + name + ')*)?')

        # A regexp for notices that might have slipped by.  Just matching
        # 'copyright' is too noisy, and 'copyright.*[0-9]' falls foul of
        # HTML header markers, so check for 'copyright' and two digits.
        self.other_copyright_re = re.compile ('(^|[^\._])copyright[^=]*[0-9][0-9]',
                                              re.IGNORECASE)
        self.comment_re = re.compile('#+|[*]+|;+|%+|//+|@c |dnl ')
        self.holders = { '@copying': '@copying' }
        self.holder_prefixes = set()

        # True to 'quilt add' files before changing them.
        self.use_quilt = False

        # If set, force all notices to include this year.
        self.max_year = None

        # Goes after the year(s).  Could be ', '.
        self.separator = ' '

    def add_package_author (self, holder, canon_form = None):
        if not canon_form:
            canon_form = holder
        self.holders[holder] = canon_form
        index = holder.find (' ')
        while index >= 0:
            self.holder_prefixes.add (holder[:index])
            index = holder.find (' ', index + 1)

    def add_external_author (self, holder):
        self.holders[holder] = None

    class BadYear():
        def __init__ (self, year):
            self.year = year

        def __str__ (self):
            return 'unrecognised year: ' + self.year

    def parse_year (self, string):
        year = int (string)
        if len (string) == 2:
            if year > 70:
                return year + 1900
        elif len (string) == 4:
            return year
        raise self.BadYear (string)

    def year_range (self, years):
        year_list = [self.parse_year (year)
                     for year in self.year_re.findall (years)]
        assert len (year_list) > 0
        return (min (year_list), max (year_list))

    def set_use_quilt (self, use_quilt):
        self.use_quilt = use_quilt

    def include_year (self, year):
        assert not self.max_year
        self.max_year = year

    def canonicalise_years (self, dir, filename, filter, years):
        # Leave texinfo variables alone.
        if years.startswith ('@value'):
            return years

        (min_year, max_year) = self.year_range (years)

        # Update the upper bound, if enabled.
        if self.max_year and not filter.is_fossilised_file (dir, filename):
            max_year = max (max_year, self.max_year)

        # Use a range.
        if min_year == max_year:
            return '%d' % min_year
        else:
            return '%d-%d' % (min_year, max_year)

    def strip_continuation (self, line):
        line = line.lstrip()
        match = self.comment_re.match (line)
        if match:
            line = line[match.end():].lstrip()
        return line

    def is_complete (self, match):
        holder = match.group (4)
        return (holder
                and (holder not in self.holder_prefixes
                     or holder in self.holders))

    def update_copyright (self, dir, filename, filter, file, line, match):
        orig_line = line
        next_line = None
        pathname = os.path.join (dir, filename)

        intro = match.group (1)
        if intro.startswith ('@set'):
            # Texinfo year variables should always be on one line
            after_years = line[match.end (2):].strip()
            if after_years != '':
                self.errors.report (pathname,
                                    'trailing characters in @set: '
                                    + after_years)
                return (False, orig_line, next_line)
        else:
            # If it looks like the copyright is incomplete, add the next line.
            while not self.is_complete (match):
                try:
                    next_line = file.next()
                except StopIteration:
                    break

                # If the next line doesn't look like a proper continuation,
                # assume that what we've got is complete.
                continuation = self.strip_continuation (next_line)
                if not self.continuation_re.match (continuation):
                    break

                # Merge the lines for matching purposes.
                orig_line += next_line
                line = line.rstrip() + ' ' + continuation
                next_line = None

                # Rematch with the longer line, at the original position.
                match = self.copyright_re.match (line, match.start())
                assert match

            holder = match.group (4)

            # Use the filter to test cases where markup is getting in the way.
            if filter.by_package_author (dir, filename):
                assert holder not in self.holders

            elif not holder:
                self.errors.report (pathname, 'missing copyright holder')
                return (False, orig_line, next_line)

            elif holder not in self.holders:
                self.errors.report (pathname,
                                    'unrecognised copyright holder: ' + holder)
                return (False, orig_line, next_line)

            else:
                # See whether the copyright is associated with the package
                # author.
                canon_form = self.holders[holder]
                if not canon_form:
                    return (False, orig_line, next_line)

                # Make sure the author is given in a consistent way.
                line = (line[:match.start (4)]
                        + canon_form
                        + line[match.end (4):])

                # Remove any 'by'
                line = line[:match.start (3)] + line[match.end (3):]

        # Update the copyright years.
        years = match.group (2).strip()
        if (self.max_year
            and match.start(0) > 0 and line[match.start(0)-1] == '"'
            and not filter.is_fossilised_file (dir, filename)):
            # A printed copyright date consists of the current year
            canon_form = '%d' % self.max_year
        else:
            try:
                canon_form = self.canonicalise_years (dir, filename, filter, years)
            except self.BadYear as e:
                self.errors.report (pathname, str (e))
                return (False, orig_line, next_line)

        line = (line[:match.start (2)]
                + ' ' + canon_form + self.separator
                + line[match.end (2):])

        # Use the standard (C) form.
        if intro.endswith ('right'):
            intro += ' (C)'
        elif intro.endswith ('(c)'):
            intro = intro[:-3] + '(C)'
        line = line[:match.start (1)] + intro + line[match.end (1):]

        # Strip trailing whitespace
        line = line.rstrip() + '\n'

        return (line != orig_line, line, next_line)

    def process_file (self, dir, filename, filter):
        pathname = os.path.join (dir, filename)
        if filename.endswith ('.tmp'):
            # Looks like something we tried to create before.
            try:
                os.remove (pathname)
            except OSError:
                pass
            return

        lines = []
        changed = False
        line_filter = filter.get_line_filter (dir, filename)
        with open (pathname, 'r') as file:
            prev = None
            for line in file:
                while line:
                    next_line = None
                    # Leave filtered-out lines alone.
                    if not (line_filter and line_filter.match (line)):
                        match = self.copyright_re.search (line)
                        if match:
                            res = self.update_copyright (dir, filename, filter,
                                                         file, line, match)
                            (this_changed, line, next_line) = res
                            changed = changed or this_changed

                        # Check for copyright lines that might have slipped by.
                        elif self.other_copyright_re.search (line):
                            self.errors.report (pathname,
                                                'unrecognised copyright: %s'
                                                % line.strip())
                    lines.append (line)
                    line = next_line

        # If something changed, write the new file out.
        if changed and self.errors.ok():
            tmp_pathname = pathname + '.tmp'
            with open (tmp_pathname, 'w') as file:
                for line in lines:
                    file.write (line)
            if self.use_quilt:
                subprocess.call (['quilt', 'add', pathname])
            os.rename (tmp_pathname, pathname)

    def process_tree (self, tree, filter):
        for (dir, subdirs, filenames) in os.walk (tree):
            # Don't recurse through directories that should be skipped.
            for i in xrange (len (subdirs) - 1, -1, -1):
                if filter.skip_dir (dir, subdirs[i]):
                    del subdirs[i]

            # Handle the files in this directory.
            for filename in filenames:
                if filter.skip_file (dir, filename):
                    sys.stdout.write ('Skipping %s\n'
                                      % os.path.join (dir, filename))
                else:
                    self.process_file (dir, filename, filter)

class CmdLine:
    def __init__ (self, copyright = Copyright):
        self.errors = Errors()
        self.copyright = copyright (self.errors)
        self.dirs = []
        self.default_dirs = []
        self.chosen_dirs = []
        self.option_handlers = dict()
        self.option_help = []

        self.add_option ('--help', 'Print this help', self.o_help)
        self.add_option ('--quilt', '"quilt add" files before changing them',
                         self.o_quilt)
        self.add_option ('--this-year', 'Add the current year to every notice',
                         self.o_this_year)

    def add_option (self, name, help, handler):
        self.option_help.append ((name, help))
        self.option_handlers[name] = handler

    def add_dir (self, dir, filter = GenericFilter()):
        self.dirs.append ((dir, filter))

    def o_help (self, option = None):
        sys.stdout.write ('Usage: %s [options] dir1 dir2...\n\n'
                          'Options:\n' % sys.argv[0])
        format = '%-15s %s\n'
        for (what, help) in self.option_help:
            sys.stdout.write (format % (what, help))
        sys.stdout.write ('\nDirectories:\n')

        format = '%-25s'
        i = 0
        for (dir, filter) in self.dirs:
            i += 1
            if i % 3 == 0 or i == len (self.dirs):
                sys.stdout.write (dir + '\n')
            else:
                sys.stdout.write (format % dir)
        sys.exit (0)

    def o_quilt (self, option):
        self.copyright.set_use_quilt (True)

    def o_this_year (self, option):
        self.copyright.include_year (time.localtime().tm_year)

    def main (self):
        for arg in sys.argv[1:]:
            if arg[:1] != '-':
                self.chosen_dirs.append (arg)
            elif arg in self.option_handlers:
                self.option_handlers[arg] (arg)
            else:
                self.errors.report (None, 'unrecognised option: ' + arg)
        if self.errors.ok():
            if len (self.chosen_dirs) == 0:
                self.chosen_dirs = self.default_dirs
            if len (self.chosen_dirs) == 0:
                self.o_help()
            else:
                for chosen_dir in self.chosen_dirs:
                    canon_dir = os.path.join (chosen_dir, '')
                    count = 0
                    for (dir, filter) in self.dirs:
                        if (dir + os.sep).startswith (canon_dir):
                            count += 1
                            self.copyright.process_tree (dir, filter)
                    if count == 0:
                        self.errors.report (None, 'unrecognised directory: '
                                            + chosen_dir)
        sys.exit (0 if self.errors.ok() else 1)

#----------------------------------------------------------------------------

class TopLevelFilter (GenericFilter):
    def skip_dir (self, dir, subdir):
        return True

class ConfigFilter (GenericFilter):
    def __init__ (self):
        GenericFilter.__init__ (self)

    def skip_file (self, dir, filename):
        if filename.endswith ('.m4'):
            pathname = os.path.join (dir, filename)
            with open (pathname) as file:
                # Skip files imported from gettext.
                if file.readline().find ('gettext-') >= 0:
                    return True
        return GenericFilter.skip_file (self, dir, filename)

class LdFilter (GenericFilter):
    def __init__ (self):
        GenericFilter.__init__ (self)

        self.skip_extensions |= set ([
                # ld testsuite output match files.
                '.ro',
                ])

class BinutilsCopyright (Copyright):
    def __init__ (self, errors):
        Copyright.__init__ (self, errors)

        canon_fsf = 'Free Software Foundation, Inc.'
        self.add_package_author ('Free Software Foundation', canon_fsf)
        self.add_package_author ('Free Software Foundation.', canon_fsf)
        self.add_package_author ('Free Software Foundation Inc.', canon_fsf)
        self.add_package_author ('Free Software Foundation, Inc', canon_fsf)
        self.add_package_author ('Free Software Foundation, Inc.', canon_fsf)
        self.add_package_author ('The Free Software Foundation', canon_fsf)
        self.add_package_author ('The Free Software Foundation, Inc.', canon_fsf)
        self.add_package_author ('Software Foundation, Inc.', canon_fsf)

        self.add_external_author ('Carnegie Mellon University')
        self.add_external_author ('John D. Polstra.')
        self.add_external_author ('Linaro Ltd.')
        self.add_external_author ('MIPS Computer Systems, Inc.')
        self.add_external_author ('Red Hat Inc.')
        self.add_external_author ('Regents of the University of California.')
        self.add_external_author ('The Regents of the University of California.')
        self.add_external_author ('Third Eye Software, Inc.')
        self.add_external_author ('Ulrich Drepper')
        self.add_external_author ('Synopsys Inc.')

class BinutilsCmdLine (CmdLine):
    def __init__ (self):
        CmdLine.__init__ (self, BinutilsCopyright)

        self.add_dir ('.', TopLevelFilter())
        self.add_dir ('bfd')
        self.add_dir ('binutils')
        self.add_dir ('config', ConfigFilter())
        self.add_dir ('cpu')
        self.add_dir ('elfcpp')
        self.add_dir ('etc')
        self.add_dir ('gas')
        self.add_dir ('gdb')
        self.add_dir ('gold')
        self.add_dir ('gprof')
        self.add_dir ('include')
        self.add_dir ('ld', LdFilter())
        self.add_dir ('libctf')
        self.add_dir ('libdecnumber')
        self.add_dir ('libiberty')
        self.add_dir ('opcodes')
        self.add_dir ('readline')
        self.add_dir ('sim')

        self.default_dirs = [
            'bfd',
            'binutils',
            'elfcpp',
            'etc',
            'gas',
            'gold',
            'gprof',
            'include',
            'ld',
            'libctf',
            'libiberty',
            'opcodes',
            ]

BinutilsCmdLine().main()