aboutsummaryrefslogtreecommitdiff
path: root/gbp/scripts/dch.py
blob: 59e920b10888ce9811774919f542537c7353ce1f (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
# vim: set fileencoding=utf-8 :
#
# (C) 2007, 2008, 2009, 2010, 2013, 2015 Guido Guenther <agx@sigxcpu.org>
#    This program 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 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, please see
#    <http://www.gnu.org/licenses/>
#
"""Generate Debian changelog entries from Git commit messages"""

from __future__ import print_function

import os.path
import re
import sys
import shutil
import gbp.command_wrappers as gbpc
import gbp.dch as dch
import gbp.log
from gbp.config import GbpOptionParserDebian, GbpOptionGroup
from gbp.errors import GbpError
from gbp.deb import compare_versions
from gbp.deb.source import DebianSource, DebianSourceError
from gbp.deb.git import GitRepositoryError, DebianGitRepository
from gbp.deb.changelog import ChangeLog, NoChangeLogError
from gbp.scripts.common import ExitCodes

user_customizations = {}
snapshot_re = re.compile("\s*\*\* SNAPSHOT build @(?P<commit>[a-z0-9]+)\s+\*\*")


def guess_version_from_upstream(repo, upstream_tag_format, upstream_branch, cp):
    """
    Guess the version based on the latest version on the upstream branch.
    If the version in dch is already higher this function returns None.
    """
    try:
        version = repo.debian_version_from_upstream(upstream_tag_format,
                                                    upstream_branch,
                                                    epoch=cp.epoch,
                                                    debian_release=False)
        gbp.log.debug("Found upstream version %s." % version)
        if compare_versions(version, cp.version) > 0:
            return "%s-1" % version
    except GitRepositoryError as e:
        gbp.log.debug("No upstream tag found: %s" % e)
    return None


def get_author_email(repo, use_git_config):
    """Get author and email from git configuration"""
    author = email = None

    if use_git_config:
        try:
            author = repo.get_config('user.name')
        except KeyError:
            pass

        try:
            email = repo.get_config('user.email')
        except KeyError:
            pass
    return author, email


def fixup_section(repo, use_git_author, options, dch_options):
    """
    Fixup the changelog header and trailer's committer and email address

    It might otherwise point to the last git committer instead of the person
    creating the changelog

    This also applies --distribution and --urgency options passed to gbp dch
    """
    author, email = get_author_email(repo, use_git_author)
    used_options = ['distribution', 'urgency']
    opts = []
    mainttrailer_opts = ['--nomainttrailer', '--mainttrailer', '-t']

    # This must not be done for snapshots or snapshots changelog entries
    # will not be concatenated
    if not options.snapshot:
        for opt in used_options:
            val = getattr(options, opt)
            if val:
                gbp.log.debug("Set header option '%s' to '%s'" % (opt, val))
                opts.append("--%s=%s" % (opt, val))
    else:
        gbp.log.debug("Snapshot enabled: do not fixup options in header")

    for opt in mainttrailer_opts:
        if opt in dch_options:
            break
    else:
        opts.append(mainttrailer_opts[0])
    ChangeLog.spawn_dch(msg='', author=author, email=email, dch_options=dch_options + opts)


def snapshot_version(version):
    """
    Get the current release and snapshot version.

    Format is <debian-version>~<release>.gbp<short-commit-id>

    >>> snapshot_version('1.0-1')
    ('1.0-1', 0)
    >>> snapshot_version('1.0-1~1.test0')
    ('1.0-1~1.test0', 0)
    >>> snapshot_version('1.0-1~2.gbp1234')
    ('1.0-1', 2)
    """
    try:
        (release, suffix) = version.rsplit('~', 1)
        (snapshot, commit) = suffix.split('.', 1)
        if not commit.startswith('gbp'):
            raise ValueError
        else:
            snapshot = int(snapshot)
    except ValueError:  # not a snapshot release
        release = version
        snapshot = 0
    return release, snapshot


def mangle_changelog(changelog, cp, snapshot=''):
    """
    Mangle changelog to either add or remove snapshot markers

    @param snapshot: SHA1 if snapshot header should be added/maintained,
        empty if it should be removed
    @type  snapshot: C{str}
    """
    try:
        tmpfile = '%s.%s' % (changelog, snapshot)
        cw = open(tmpfile, 'w')
        cr = open(changelog, 'r')

        print("%(Source)s (%(MangledVersion)s) "
              "%(Distribution)s; urgency=%(urgency)s\n" % cp, file=cw)

        cr.readline()  # skip version and empty line
        cr.readline()
        line = cr.readline()
        if snapshot_re.match(line):
            cr.readline()  # consume the empty line after the snapshot header
            line = ''

        if snapshot:
            print("  ** SNAPSHOT build @%s **\n" % snapshot, file=cw)

        if line:
            print(line.rstrip(), file=cw)
        shutil.copyfileobj(cr, cw)
        cw.close()
        cr.close()
        os.unlink(changelog)
        os.rename(tmpfile, changelog)
    except OSError as e:
        raise GbpError("Error mangling changelog %s" % e)


def do_release(changelog, repo, cp, use_git_author, dch_options):
    """Remove the snapshot header and set the distribution"""
    author, email = get_author_email(repo, use_git_author)
    (release, snapshot) = snapshot_version(cp['Version'])
    if snapshot:
        cp['MangledVersion'] = release
        mangle_changelog(changelog, cp)
    cp.spawn_dch(release=True, author=author, email=email, dch_options=dch_options)


def do_snapshot(changelog, repo, next_snapshot):
    """
    Add new snapshot banner to most recent changelog section.
    The next snapshot number is calculated by eval()'ing next_snapshot.
    """
    commit = repo.head

    cp = ChangeLog(filename=changelog)
    (release, snapshot) = snapshot_version(cp['Version'])
    snapshot = int(eval(next_snapshot))

    suffix = "%d.gbp%s" % (snapshot, "".join(commit[0:6]))
    cp['MangledVersion'] = "%s~%s" % (release, suffix)

    mangle_changelog(changelog, cp, commit)
    return snapshot, commit, cp['MangledVersion']


def parse_commit(repo, commitid, opts, last_commit=False):
    """Parse a commit and return message, author, and author email"""
    commit_info = repo.get_commit_info(commitid)
    author = commit_info['author'].name
    email = commit_info['author'].email
    format_entry = user_customizations.get('format_changelog_entry')
    if not format_entry:
        format_entry = dch.format_changelog_entry
    entry = format_entry(commit_info, opts, last_commit=last_commit)
    return entry, (author, email)


def guess_documented_commit(cp, repo, tagformat):
    """
    Guess the last commit documented in the changelog from the snapshot banner,
    the last tagged version or the last point the changelog was touched.

    @param cp: the changelog
    @param repo: the git repository
    @param tagformat: the format for Debian tags
    @returns: the commit that was last documented in the changelog
    @rtype: C{str}
    @raises GbpError: In case we fail to find a commit to start at
    """
    # Check for snapshot banner
    sr = re.search(snapshot_re, cp['Changes'])
    if sr:
        return sr.group('commit')

    # Check if the latest version in the changelog is already tagged. If
    # so this is the last documented commit.
    commit = repo.find_version(tagformat, cp.version)
    if commit:
        gbp.log.info("Found tag for topmost changelog version '%s'" % commit)
        return commit

    # Check when the changelog was last touched
    last = repo.get_commits(paths="debian/changelog", num=1)
    if last:
        gbp.log.info("Changelog last touched at '%s'" % last[0])
        return last[0]

    # Changelog not touched yet
    return None


def has_snapshot_banner(cp):
    """Whether the changelog has a snapshot banner"""
    sr = re.search(snapshot_re, cp['Changes'])
    return True if sr else False


def get_customizations(customization_file):
    if customization_file:
        execfile(customization_file,
                 user_customizations,
                 user_customizations)


def process_options(options, parser):
    if options.snapshot and options.release:
        parser.error("'--snapshot' and '--release' are incompatible options")

    if options.since and options.auto:
        parser.error("'--since' and '--auto' are incompatible options")

    dch_options = []
    if options.multimaint_merge:
        dch_options.append("--multimaint-merge")
    else:
        dch_options.append("--nomultimaint-merge")

    if options.multimaint:
        dch_options.append("--multimaint")
    else:
        dch_options.append("--nomultimaint")

    if options.force_distribution:
        dch_options.append("--force-distribution")

    get_customizations(options.customization_file)
    return dch_options


def process_editor_option(options):
    """Determine text editor and check if we need it"""
    states = ['always']

    if options.snapshot:
        states.append("snapshot")
    elif options.release:
        states.append("release")

    if options.spawn_editor == 'never' or options.spawn_editor not in states:
        return None
    else:
        return "sensible-editor"


def changelog_commit_msg(options, version):
    return options.commit_msg % dict(version=version)


def build_parser(name):
    try:
        parser = GbpOptionParserDebian(command=os.path.basename(name),
                                       usage='%prog [options] paths')
    except GbpError as err:
        gbp.log.err(err)
        return None

    range_group = GbpOptionGroup(parser, "commit range options",
                                 "which commits to add to the changelog")
    version_group = GbpOptionGroup(parser, "release & version number options",
                                   "what version number and release to use")
    commit_group = GbpOptionGroup(parser, "commit message formatting",
                                  "howto format the changelog entries")
    naming_group = GbpOptionGroup(parser, "branch and tag naming",
                                  "branch names and tag formats")
    custom_group = GbpOptionGroup(parser, "customization",
                                  "options for customization")
    parser.add_option_group(range_group)
    parser.add_option_group(version_group)
    parser.add_option_group(commit_group)
    parser.add_option_group(naming_group)
    parser.add_option_group(custom_group)

    parser.add_boolean_config_file_option(option_name="ignore-branch", dest="ignore_branch")
    naming_group.add_config_file_option(option_name="upstream-branch", dest="upstream_branch")
    naming_group.add_config_file_option(option_name="debian-branch", dest="debian_branch")
    naming_group.add_config_file_option(option_name="upstream-tag", dest="upstream_tag")
    naming_group.add_config_file_option(option_name="debian-tag", dest="debian_tag")
    naming_group.add_config_file_option(option_name="snapshot-number", dest="snapshot_number",
                                        help="expression to determine the next snapshot number, "
                                        "default is '%(snapshot-number)s'")
    parser.add_config_file_option(option_name="git-log", dest="git_log",
                                  help="options to pass to git-log, "
                                  "default is '%(git-log)s'")
    parser.add_option("-v", "--verbose", action="store_true", dest="verbose", default=False,
                      help="verbose command execution")
    parser.add_config_file_option(option_name="color", dest="color", type='tristate')
    parser.add_config_file_option(option_name="color-scheme",
                                  dest="color_scheme")
    range_group.add_option("-s", "--since", dest="since", help="commit to start from (e.g. HEAD^^^, debian/0.4.3)")
    range_group.add_option("-a", "--auto", action="store_true", dest="auto", default=False,
                           help="autocomplete changelog from last snapshot or tag")
    version_group.add_option("-R", "--release", action="store_true", dest="release", default=False,
                             help="mark as release")
    version_group.add_option("-S", "--snapshot", action="store_true", dest="snapshot", default=False,
                             help="mark as snapshot build")
    version_group.add_option("-D", "--distribution", dest="distribution", help="Set distribution")
    version_group.add_option("--force-distribution", action="store_true", dest="force_distribution", default=False,
                             help="Force the provided distribution to be used, "
                             "even if it doesn't match the list of known distributions")
    version_group.add_option("-N", "--new-version", dest="new_version",
                             help="use this as base for the new version number")
    version_group.add_config_file_option("urgency", dest="urgency")
    version_group.add_option("--bpo", dest="bpo", action="store_true", default=False,
                             help="Increment the Debian release number for an upload to backports, "
                             "and add a backport upload changelog comment.")
    version_group.add_option("--nmu", dest="nmu", action="store_true", default=False,
                             help="Increment the Debian release number for a non-maintainer upload")
    version_group.add_option("--qa", dest="qa", action="store_true", default=False,
                             help="Increment the Debian release number for a Debian QA Team upload, "
                             "and add a QA upload changelog comment.")
    version_group.add_option("--team", dest="team", action="store_true", default=False,
                             help="Increment the Debian release number for a Debian Team upload, "
                             "and add a Team upload changelog comment.")
    version_group.add_option("--security", dest="security", action="store_true", default=False,
                             help="Increment the Debian release number for a security upload and "
                             "add a security upload changelog comment.")
    version_group.add_boolean_config_file_option(option_name="git-author", dest="use_git_author")
    commit_group.add_boolean_config_file_option(option_name="meta", dest="meta")
    commit_group.add_config_file_option(option_name="meta-closes", dest="meta_closes")
    commit_group.add_config_file_option(option_name="meta-closes-bugnum", dest="meta_closes_bugnum")
    commit_group.add_boolean_config_file_option(option_name="full", dest="full")
    commit_group.add_config_file_option(option_name="id-length", dest="idlen",
                                        help="include N digits of the commit id in the changelog entry, "
                                        "default is '%(id-length)s'",
                                        type="int", metavar="N")
    commit_group.add_config_file_option(option_name="ignore-regex", dest="ignore_regex",
                                        help="Ignore commit lines matching regex, "
                                        "default is '%(ignore-regex)s'")
    commit_group.add_boolean_config_file_option(option_name="multimaint", dest="multimaint")
    commit_group.add_boolean_config_file_option(option_name="multimaint-merge", dest="multimaint_merge")
    commit_group.add_config_file_option(option_name="spawn-editor", dest="spawn_editor")
    parser.add_config_file_option(option_name="commit-msg",
                                  dest="commit_msg")
    parser.add_option("-c", "--commit", action="store_true", dest="commit", default=False,
                      help="commit changelog file after generating")

    help_msg = ('Load Python code from CUSTOMIZATION_FILE.  At the moment,'
                ' the only useful thing the code can do is define a custom'
                ' format_changelog_entry() function.')
    custom_group.add_config_file_option(option_name="customizations",
                                        dest="customization_file",
                                        help=help_msg)
    return parser


def parse_args(argv):
    parser = build_parser(argv[0])
    if not parser:
        return [None] * 4

    (options, args) = parser.parse_args(argv[1:])
    gbp.log.setup(options.color, options.verbose, options.color_scheme)
    dch_options = process_options(options, parser)
    editor_cmd = process_editor_option(options)
    return options, args, dch_options, editor_cmd


def main(argv):
    ret = 0
    changelog = 'debian/changelog'
    until = 'HEAD'
    found_snapshot_banner = False
    version_change = {}
    branch = None

    options, args, dch_options, editor_cmd = parse_args(argv)

    if not options:
        return ExitCodes.parse_error

    try:
        try:
            repo = DebianGitRepository('.')
        except GitRepositoryError:
            raise GbpError("%s is not a git repository" % (os.path.abspath('.')))

        try:
            branch = repo.get_branch()
        except GitRepositoryError:
            # Not being on any branch is o.k. with --ignore-branch
            if not options.ignore_branch:
                raise

        if options.debian_branch != branch and not options.ignore_branch:
            gbp.log.err("You are not on branch '%s' but on '%s'" % (options.debian_branch, branch))
            raise GbpError("Use --ignore-branch to ignore or --debian-branch to set the branch name.")

        source = DebianSource('.')
        cp = source.changelog

        if options.since:
            since = options.since
        else:
            since = ''
            if options.auto:
                since = guess_documented_commit(cp, repo, options.debian_tag)
                if since:
                    msg = "Continuing from commit '%s'" % since
                else:
                    msg = "Starting from first commit"
                gbp.log.info(msg)
                found_snapshot_banner = has_snapshot_banner(cp)
            else:  # Fallback: continue from last tag
                since = repo.find_version(options.debian_tag, cp['Version'])
                if not since:
                    raise GbpError("Version %s not found" % cp['Version'])

        if args:
            gbp.log.info("Only looking for changes on '%s'" % " ".join(args))
        commits = repo.get_commits(since=since, until=until, paths=args,
                                   options=options.git_log.split(" "))
        commits.reverse()

        add_section = False
        # add a new changelog section if:
        if (options.new_version or options.bpo or options.nmu or options.qa or
                options.team or options.security):
            if options.bpo:
                version_change['increment'] = '--bpo'
            elif options.nmu:
                version_change['increment'] = '--nmu'
            elif options.qa:
                version_change['increment'] = '--qa'
            elif options.team:
                version_change['increment'] = '--team'
            elif options.security:
                version_change['increment'] = '--security'
            else:
                version_change['version'] = options.new_version
            # the user wants to force a new version
            add_section = True
        elif cp['Distribution'] != "UNRELEASED" and not found_snapshot_banner:
            if commits:
                # the last version was a release and we have pending commits
                add_section = True
            if options.snapshot:
                # the user want to switch to snapshot mode
                add_section = True

        if add_section and not version_change and not source.is_native():
            # Get version from upstream if none provided
            v = guess_version_from_upstream(repo, options.upstream_tag,
                                            options.upstream_branch, cp)
            if v:
                version_change['version'] = v

        i = 0
        for c in commits:
            i += 1
            parsed = parse_commit(repo, c, options,
                                  last_commit=(i == len(commits)))
            commit_msg, (commit_author, commit_email) = parsed
            if not commit_msg:
                # Some commits can be ignored
                continue

            if add_section:
                # Add a section containing just this message (we can't
                # add an empty section with dch)
                cp.add_section(distribution="UNRELEASED", msg=commit_msg,
                               version=version_change,
                               author=commit_author,
                               email=commit_email,
                               dch_options=dch_options)
                # Adding a section only needs to happen once.
                add_section = False
            else:
                cp.add_entry(commit_msg, commit_author, commit_email, dch_options)

        # Show a message if there were no commits (not even ignored
        # commits).
        if not commits:
            gbp.log.info("No changes detected from %s to %s." % (since, until))

        if add_section:
            # If we end up here, then there were no commits to include,
            # so we put a dummy message in the new section.
            cp.add_section(distribution="UNRELEASED", msg=["UNRELEASED"],
                           version=version_change,
                           dch_options=dch_options)

        fixup_section(repo, use_git_author=options.use_git_author, options=options,
                      dch_options=dch_options)

        if options.release:
            do_release(changelog, repo, cp, use_git_author=options.use_git_author,
                       dch_options=dch_options)
        elif options.snapshot:
            (snap, commit, version) = do_snapshot(changelog, repo, options.snapshot_number)
            gbp.log.info("Changelog %s (snapshot #%d) prepared up to %s" % (version, snap, commit[:7]))

        if editor_cmd:
            gbpc.Command(editor_cmd, ["debian/changelog"])()

        if options.commit:
            # Get the version from the changelog file (since dch might
            # have incremented it, there's no way we can already know
            # the version).
            version = ChangeLog(filename=changelog).version
            # Commit the changes to the changelog file
            msg = changelog_commit_msg(options, version)
            repo.commit_files([changelog], msg)
            gbp.log.info("Changelog committed for version %s" % version)
    except KeyboardInterrupt:
        ret = 1
        gbp.log.err("Interrupted. Aborting.")
    except (gbpc.CommandExecFailed,
            GbpError,
            GitRepositoryError,
            DebianSourceError,
            NoChangeLogError) as err:
        if str(err):
            gbp.log.err(err)
        ret = 1
    return ret


if __name__ == "__main__":
    sys.exit(main(sys.argv))

# vim:et:ts=4:sw=4:et:sts=4:ai:set list listchars=tab\:»·,trail\:·: