4 Check for obsolete binary packages
6 @contact: Debian FTP Master <ftpmaster@debian.org>
7 @copyright: 2000-2006 James Troup <james@nocrew.org>
8 @copyright: 2009 Torsten Werner <twerner@debian.org>
9 @copyright: 2015 Niels Thykier <niels@thykier.net>
10 @license: GNU General Public License version 2 or later
13 # This program is free software; you can redistribute it and/or modify
14 # it under the terms of the GNU General Public License as published by
15 # the Free Software Foundation; either version 2 of the License, or
16 # (at your option) any later version.
18 # This program is distributed in the hope that it will be useful,
19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 # GNU General Public License for more details.
23 # You should have received a copy of the GNU General Public License
24 # along with this program; if not, write to the Free Software
25 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 ################################################################################
29 # | priviledged positions? What privilege? The honour of working harder
30 # | than most people for absolutely no recognition?
32 # Manoj Srivastava <srivasta@debian.org> in <87lln8aqfm.fsf@glaurung.internal.golden-gryphon.com>
34 ################################################################################
38 from itertools import chain, product
39 from collections import defaultdict
41 from daklib.config import Config
42 from daklib.dbconn import *
43 from daklib import utils
44 from daklib.cruft import *
45 from daklib.rm import remove, ReverseDependencyChecker
47 ################################################################################
50 def usage(exit_code=0):
51 print """Usage: dak auto-decruft
52 Automatic removal of common kinds of cruft
54 -h, --help show this help and exit.
55 -n, --dry-run don't do anything, just show what would have been done
56 -s, --suite=SUITE check suite SUITE.
57 --if-newer-version-in OS remove all packages in SUITE with a lower version than
58 in OS (e.g. -s experimental --if-newer-version-in
60 --if-newer-version-in-rm-msg RMMSG
61 use RMMSG in the removal message (e.g. "NVIU")
65 ################################################################################
68 def compute_sourceless_groups(suite_id, session):
69 """Find binaries without a source
72 @param suite_id: The id of the suite denoted by suite_name
74 @type session: SQLA Session
75 @param session: The database session in use
77 rows = query_without_source(suite_id, session)
78 message = '[auto-cruft] no longer built from source, no reverse dependencies'
79 arch_all_id_tuple = tuple([get_architecture('all', session=session)])
80 arch_all_list = ["all"]
84 "name": "sourceless:%s" % package,
85 "packages": tuple([package]),
86 "architectures": arch_all_list,
87 "architecture_ids": arch_all_id_tuple,
90 package: arch_all_list,
96 def compute_nbs_groups(suite_id, suite_name, session):
97 """Find binaries no longer built
100 @param suite_id: The id of the suite denoted by suite_name
102 @type suite_name: string
103 @param suite_name: The name of the suite to remove from
105 @type session: SQLA Session
106 @param session: The database session in use
108 rows = queryNBS(suite_id, session)
109 arch2ids = dict((a.arch_string, a.arch_id) for a in get_suite_architectures(suite_name))
112 (pkg_list, arch_list, source, _) = row
113 message = '[auto-cruft] NBS (no longer built by %s, no reverse dependencies)' % source
114 removal_request = dict((pkg, arch_list) for pkg in pkg_list)
116 "name": "NBS:%s" % source,
117 "packages": tuple(sorted(pkg_list)),
118 "architectures": sorted(arch_list, cmp=utils.arch_compare_sw),
119 "architecture_ids": tuple(arch2ids[arch] for arch in arch_list),
121 "removal_request": removal_request,
126 def remove_groups(groups, suite_id, suite_name, session):
128 message = group["message"]
130 "architecture_ids": group["architecture_ids"],
131 "packages": group["packages"],
134 q = session.execute("""
135 SELECT b.package, b.version, a.arch_string, b.id
137 JOIN bin_associations ba ON b.id = ba.bin
138 JOIN architecture a ON b.architecture = a.id
139 JOIN suite su ON ba.suite = su.id
140 WHERE a.id IN :architecture_ids AND b.package IN :packages AND su.id = :suite_id
143 remove(session, message, [suite_name], list(q), partial=True, whoami="DAK's auto-decrufter")
148 for iterable in args:
149 for value in iterable:
150 if value not in seen:
155 def merge_group(groupA, groupB):
156 """Merges two removal groups into one
158 Note that some values are taken entirely from groupA (e.g. name and message)
161 @param groupA: A removal group
164 @param groupB: Another removal group
167 @returns: A merged group
169 pkg_list = sorted(dedup(groupA["packages"], groupB["packages"]))
170 arch_list = sorted(dedup(groupA["architectures"], groupB["architectures"]), cmp=utils.arch_compare_sw)
171 arch_list_id = dedup(groupA["architecture_ids"], groupB["architecture_ids"])
172 removalA = groupA["removal_request"]
173 removalB = groupB["removal_request"]
175 for pkg in dedup(removalA, removalB):
176 listA = removalA[pkg] if pkg in removalA else []
177 listB = removalB[pkg] if pkg in removalB else []
178 new_removal[pkg] = sorted(dedup(listA, listB), cmp=utils.arch_compare_sw)
181 "name": groupA["name"],
182 "packages": tuple(pkg_list),
183 "architectures": arch_list,
184 "architecture_ids": tuple(arch_list_id),
185 "message": groupA["message"],
186 "removal_request": new_removal,
192 def auto_decruft_suite(suite_name, suite_id, session, dryrun, debug):
193 """Run the auto-decrufter on a given suite
195 @type suite_name: string
196 @param suite_name: The name of the suite to remove from
199 @param suite_id: The id of the suite denoted by suite_name
201 @type session: SQLA Session
202 @param session: The database session in use
205 @param dryrun: If True, just print the actions rather than actually doing them
208 @param debug: If True, print some extra information
210 all_architectures = [a.arch_string for a in get_suite_architectures(suite_name)]
211 pkg_arch2groups = defaultdict(set)
214 full_removal_request = []
215 group_generator = chain(
216 compute_sourceless_groups(suite_id, session),
217 compute_nbs_groups(suite_id, suite_name, session)
219 for group in group_generator:
220 group_name = group["name"]
221 if group_name not in groups:
222 pkgs = group["packages"]
223 affected_archs = group["architectures"]
224 # If we remove an arch:all package, then the breakage can occur on any
225 # of the architectures.
226 if "all" in affected_archs:
227 affected_archs = all_architectures
228 for pkg_arch in product(pkgs, affected_archs):
229 pkg_arch2groups[pkg_arch].add(group_name)
230 groups[group_name] = group
231 group_order.append(group_name)
233 # This case usually happens when versions differ between architectures...
235 print "N: Merging group %s" % (group_name)
236 groups[group_name] = merge_group(groups[group_name], group)
238 for group_name in group_order:
239 removal_request = groups[group_name]["removal_request"]
240 full_removal_request.extend(removal_request.iteritems())
244 print "N: Found no candidates"
248 print "N: Considering to remove the following packages:"
249 for group_name in sorted(groups):
250 group_info = groups[group_name]
251 pkgs = group_info["packages"]
252 archs = group_info["architectures"]
253 print "N: * %s: %s [%s]" % (group_name, ", ".join(pkgs), " ".join(archs))
256 print "N: Compiling ReverseDependencyChecker (RDC) - please hold ..."
257 rdc = ReverseDependencyChecker(session, suite_name)
259 print "N: Computing initial breakage..."
261 breakage = rdc.check_reverse_depends(full_removal_request)
263 by_breakers = [(len(breakage[x]), x, breakage[x]) for x in breakage]
264 by_breakers.sort(reverse=True)
266 print "N: - Removal would break %s (package, architecture)-pairs" % (len(breakage))
267 print "N: - full breakage:"
268 for _, breaker, broken in by_breakers:
269 bname = "%s/%s" % breaker
270 broken_str = ", ".join("%s/%s" % b for b in sorted(broken))
271 print "N: * %s => %s" % (bname, broken_str)
273 averted_breakage = set()
275 for _, package_arch, breakage in by_breakers:
276 if breakage <= averted_breakage:
277 # We already avoided this break
279 guilty_groups = pkg_arch2groups[package_arch]
281 if not guilty_groups:
282 utils.fubar("Cannot figure what group provided %s" % str(package_arch))
285 # Only output it, if it truly a new group being discarded
286 # - a group can reach this part multiple times, if it breaks things on
287 # more than one architecture. This being rather common in fact.
288 already_discard = True
289 if any(group_name for group_name in guilty_groups if group_name in groups):
290 already_discard = False
292 if not already_discard:
293 avoided = sorted(breakage - averted_breakage)
294 print "N: - skipping removal of %s (breakage: %s)" % (", ".join(sorted(guilty_groups)), str(avoided))
296 averted_breakage |= breakage
297 for group_name in guilty_groups:
298 if group_name in groups:
299 del groups[group_name]
303 print "N: Nothing left to remove"
307 print "N: Now considering to remove: %s" % str(", ".join(sorted(groups.iterkeys())))
309 # Rebuild the removal request with the remaining groups and off
310 # we go to (not) break the world once more time
311 full_removal_request = []
312 for group_info in groups.itervalues():
313 full_removal_request.extend(group_info["removal_request"].iteritems())
314 breakage = rdc.check_reverse_depends(full_removal_request)
317 print "N: Removal looks good"
320 print "Would remove the equivalent of:"
321 for group_name in group_order:
322 if group_name not in groups:
324 group_info = groups[group_name]
325 pkgs = group_info["packages"]
326 archs = group_info["architectures"]
327 message = group_info["message"]
329 # Embed the -R just in case someone wants to run it manually later
330 print ' dak rm -m "{message}" -s {suite} -a {architectures} -p -R -b {packages}'.format(
331 message=message, suite=suite_name,
332 architectures=",".join(archs), packages=" ".join(pkgs),
336 print "Note: The removals may be interdependent. A non-breaking result may require the execution of all"
337 print "of the removals"
339 remove_groups(groups.itervalues(), suite_id, suite_name, session)
342 def sources2removals(source_list, suite_id, session):
343 """Compute removals items given a list of names of source packages
345 @type source_list: list
346 @param source_list: A list of names of source packages
349 @param suite_id: The id of the suite from which these sources should be removed
351 @type session: SQLA Session
352 @param session: The database session in use
355 @return: A list of items to be removed to remove all sources and their binaries from the given suite
358 params = {"suite_id": suite_id, "sources": tuple(source_list)}
359 q = session.execute("""
360 SELECT s.source, s.version, 'source', s.id
362 JOIN src_associations sa ON sa.source = s.id
363 WHERE sa.suite = :suite_id AND s.source IN :sources""", params)
365 q = session.execute("""
366 SELECT b.package, b.version, a.arch_string, b.id
368 JOIN bin_associations ba ON b.id = ba.bin
369 JOIN architecture a ON b.architecture = a.id
370 JOIN source s ON b.source = s.id
371 WHERE ba.suite = :suite_id AND s.source IN :sources""", params)
376 def decruft_newer_version_in(othersuite, suite_name, suite_id, rm_msg, session, dryrun):
377 """Compute removals items given a list of names of source packages
379 @type othersuite: str
380 @param othersuite: The name of the suite to compare with (e.g. "unstable" for "NVIU")
383 @param suite: The name of the suite from which to do removals (e.g. "experimental" for "NVIU")
386 @param suite_id: The id of the suite from which these sources should be removed
389 @param rm_msg: The removal message (or tag, e.g. "NVIU")
391 @type session: SQLA Session
392 @param session: The database session in use
395 @param dryrun: If True, just print the actions rather than actually doing them
397 nvi_list = [x[0] for x in newer_version(othersuite, suite_name, session)]
399 message = "[auto-cruft] %s" % rm_msg
401 print " dak rm -m \"%s\" -s %s %s" % (message, suite_name, " ".join(nvi_list))
403 removals = sources2removals(nvi_list, suite_id, session)
404 remove(session, message, [suite_name], removals, whoami="DAK's auto-decrufter")
406 ################################################################################
412 Arguments = [('h',"help","Auto-Decruft::Options::Help"),
413 ('n',"dry-run","Auto-Decruft::Options::Dry-Run"),
414 ('d',"debug","Auto-Decruft::Options::Debug"),
415 ('s',"suite","Auto-Decruft::Options::Suite","HasArg"),
416 # The "\0" seems to be the only way to disable short options.
417 ("\0",'if-newer-version-in',"Auto-Decruft::Options::OtherSuite", "HasArg"),
418 ("\0",'if-newer-version-in-rm-msg',"Auto-Decruft::Options::OtherSuiteRMMsg", "HasArg")]
419 for i in ["help", "Dry-Run", "Debug", "OtherSuite", "OtherSuiteRMMsg"]:
420 if not cnf.has_key("Auto-Decruft::Options::%s" % (i)):
421 cnf["Auto-Decruft::Options::%s" % (i)] = ""
423 cnf["Auto-Decruft::Options::Suite"] = cnf.get("Dinstall::DefaultSuite", "unstable")
425 apt_pkg.parse_commandline(cnf.Cnf, Arguments, sys.argv)
427 Options = cnf.subtree("Auto-Decruft::Options")
433 if Options["Dry-Run"]:
438 if Options["OtherSuite"] and not Options["OtherSuiteRMMsg"]:
439 utils.fubar("--if-newer-version-in requires --if-newer-version-in-rm-msg")
441 session = DBConn().session()
443 suite = get_suite(Options["Suite"].lower(), session)
445 utils.fubar("Cannot find suite %s" % Options["Suite"].lower())
447 suite_id = suite.suite_id
448 suite_name = suite.suite_name.lower()
450 auto_decruft_suite(suite_name, suite_id, session, dryrun, debug)
452 if Options["OtherSuite"]:
453 osuite = get_suite(Options["OtherSuite"].lower(), session).suite_name
454 decruft_newer_version_in(osuite, suite_name, suite_id, Options["OtherSuiteRMMsg"], session, dryrun)
456 ################################################################################
458 if __name__ == '__main__':