verify: add a config option to skip certain flag processors

Previously, "hg verify" verifies everything, which could be undesirable when
there are expensive flag processor contents.

This patch adds a "verify.skipflags" developer config. A flag processor will
be skipped if (flag & verify.skipflags) == 0.

In the LFS usecase, that means "hg verify --config verify.skipflags=8192"
will not download all LFS blobs, which could be too large to be stored
locally.

Note: "renamed" is also skipped since its default implementation may call
filelog.data() which will trigger the flag processor.

mercurial/verify.py

@@ -1,482 +1,488
 # verify.py - repository integrity checking for Mercurial
 #
 # Copyright 2006, 2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import os
 
 from .i18n import _
 from .node import (
     nullid,
     short,
 )
 
 from . import (
     error,
     revlog,
     scmutil,
     util,
 )
 
 def verify(repo):
     with repo.lock():
         return verifier(repo).verify()
 
 def _normpath(f):
     # under hg < 2.4, convert didn't sanitize paths properly, so a
     # converted repo may contain repeated slashes
     while '//' in f:
         f = f.replace('//', '/')
     return f
 
 class verifier(object):
     # The match argument is always None in hg core, but e.g. the narrowhg
     # extension will pass in a matcher here.
     def __init__(self, repo, match=None):
         self.repo = repo.unfiltered()
         self.ui = repo.ui
         self.match = match or scmutil.matchall(repo)
         self.badrevs = set()
         self.errors = 0
         self.warnings = 0
         self.havecl = len(repo.changelog) > 0
         self.havemf = len(repo.manifestlog._revlog) > 0
         self.revlogv1 = repo.changelog.version != revlog.REVLOGV0
         self.lrugetctx = util.lrucachefunc(repo.changectx)
         self.refersmf = False
         self.fncachewarned = False
+        # developer config: verify.skipflags
+        self.skipflags = repo.ui.configint('verify', 'skipflags')
 
     def warn(self, msg):
         self.ui.warn(msg + "\n")
         self.warnings += 1
 
     def err(self, linkrev, msg, filename=None):
         if linkrev is not None:
             self.badrevs.add(linkrev)
         else:
             linkrev = '?'
         msg = "%s: %s" % (linkrev, msg)
         if filename:
             msg = "%s@%s" % (filename, msg)
         self.ui.warn(" " + msg + "\n")
         self.errors += 1
 
     def exc(self, linkrev, msg, inst, filename=None):
         if not str(inst):
             inst = repr(inst)
         self.err(linkrev, "%s: %s" % (msg, inst), filename)
 
     def checklog(self, obj, name, linkrev):
         if not len(obj) and (self.havecl or self.havemf):
             self.err(linkrev, _("empty or missing %s") % name)
             return
 
         d = obj.checksize()
         if d[0]:
             self.err(None, _("data length off by %d bytes") % d[0], name)
         if d[1]:
             self.err(None, _("index contains %d extra bytes") % d[1], name)
 
         if obj.version != revlog.REVLOGV0:
             if not self.revlogv1:
                 self.warn(_("warning: `%s' uses revlog format 1") % name)
         elif self.revlogv1:
             self.warn(_("warning: `%s' uses revlog format 0") % name)
 
     def checkentry(self, obj, i, node, seen, linkrevs, f):
         lr = obj.linkrev(obj.rev(node))
         if lr < 0 or (self.havecl and lr not in linkrevs):
             if lr < 0 or lr >= len(self.repo.changelog):
                 msg = _("rev %d points to nonexistent changeset %d")
             else:
                 msg = _("rev %d points to unexpected changeset %d")
             self.err(None, msg % (i, lr), f)
             if linkrevs:
                 if f and len(linkrevs) > 1:
                     try:
                         # attempt to filter down to real linkrevs
                         linkrevs = [l for l in linkrevs
                                     if self.lrugetctx(l)[f].filenode() == node]
                     except Exception:
                         pass
                 self.warn(_(" (expected %s)") % " ".join(map(str, linkrevs)))
             lr = None # can't be trusted
 
         try:
             p1, p2 = obj.parents(node)
             if p1 not in seen and p1 != nullid:
                 self.err(lr, _("unknown parent 1 %s of %s") %
                     (short(p1), short(node)), f)
             if p2 not in seen and p2 != nullid:
                 self.err(lr, _("unknown parent 2 %s of %s") %
                     (short(p2), short(node)), f)
         except Exception as inst:
             self.exc(lr, _("checking parents of %s") % short(node), inst, f)
 
         if node in seen:
             self.err(lr, _("duplicate revision %d (%d)") % (i, seen[node]), f)
         seen[node] = i
         return lr
 
     def verify(self):
         repo = self.repo
 
         ui = repo.ui
 
         if not repo.url().startswith('file:'):
             raise error.Abort(_("cannot verify bundle or remote repos"))
 
         if os.path.exists(repo.sjoin("journal")):
             ui.warn(_("abandoned transaction found - run hg recover\n"))
 
         if ui.verbose or not self.revlogv1:
             ui.status(_("repository uses revlog format %d\n") %
                            (self.revlogv1 and 1 or 0))
 
         mflinkrevs, filelinkrevs = self._verifychangelog()
 
         filenodes = self._verifymanifest(mflinkrevs)
         del mflinkrevs
 
         self._crosscheckfiles(filelinkrevs, filenodes)
 
         totalfiles, filerevisions = self._verifyfiles(filenodes, filelinkrevs)
 
         ui.status(_("%d files, %d changesets, %d total revisions\n") %
                        (totalfiles, len(repo.changelog), filerevisions))
         if self.warnings:
             ui.warn(_("%d warnings encountered!\n") % self.warnings)
         if self.fncachewarned:
             ui.warn(_('hint: run "hg debugrebuildfncache" to recover from '
                       'corrupt fncache\n'))
         if self.errors:
             ui.warn(_("%d integrity errors encountered!\n") % self.errors)
             if self.badrevs:
                 ui.warn(_("(first damaged changeset appears to be %d)\n")
                         % min(self.badrevs))
             return 1
 
     def _verifychangelog(self):
         ui = self.ui
         repo = self.repo
         match = self.match
         cl = repo.changelog
 
         ui.status(_("checking changesets\n"))
         mflinkrevs = {}
         filelinkrevs = {}
         seen = {}
         self.checklog(cl, "changelog", 0)
         total = len(repo)
         for i in repo:
             ui.progress(_('checking'), i, total=total, unit=_('changesets'))
             n = cl.node(i)
             self.checkentry(cl, i, n, seen, [i], "changelog")
 
             try:
                 changes = cl.read(n)
                 if changes[0] != nullid:
                     mflinkrevs.setdefault(changes[0], []).append(i)
                     self.refersmf = True
                 for f in changes[3]:
                     if match(f):
                         filelinkrevs.setdefault(_normpath(f), []).append(i)
             except Exception as inst:
                 self.refersmf = True
                 self.exc(i, _("unpacking changeset %s") % short(n), inst)
         ui.progress(_('checking'), None)
         return mflinkrevs, filelinkrevs
 
     def _verifymanifest(self, mflinkrevs, dir="", storefiles=None,
                         progress=None):
         repo = self.repo
         ui = self.ui
         match = self.match
         mfl = self.repo.manifestlog
         mf = mfl._revlog.dirlog(dir)
 
         if not dir:
             self.ui.status(_("checking manifests\n"))
 
         filenodes = {}
         subdirnodes = {}
         seen = {}
         label = "manifest"
         if dir:
             label = dir
             revlogfiles = mf.files()
             storefiles.difference_update(revlogfiles)
             if progress: # should be true since we're in a subdirectory
                 progress()
         if self.refersmf:
             # Do not check manifest if there are only changelog entries with
             # null manifests.
             self.checklog(mf, label, 0)
         total = len(mf)
         for i in mf:
             if not dir:
                 ui.progress(_('checking'), i, total=total, unit=_('manifests'))
             n = mf.node(i)
             lr = self.checkentry(mf, i, n, seen, mflinkrevs.get(n, []), label)
             if n in mflinkrevs:
                 del mflinkrevs[n]
             elif dir:
                 self.err(lr, _("%s not in parent-directory manifest") %
                          short(n), label)
             else:
                 self.err(lr, _("%s not in changesets") % short(n), label)
 
             try:
                 mfdelta = mfl.get(dir, n).readdelta(shallow=True)
                 for f, fn, fl in mfdelta.iterentries():
                     if not f:
                         self.err(lr, _("entry without name in manifest"))
                     elif f == "/dev/null":  # ignore this in very old repos
                         continue
                     fullpath = dir + _normpath(f)
                     if fl == 't':
                         if not match.visitdir(fullpath):
                             continue
                         subdirnodes.setdefault(fullpath + '/', {}).setdefault(
                             fn, []).append(lr)
                     else:
                         if not match(fullpath):
                             continue
                         filenodes.setdefault(fullpath, {}).setdefault(fn, lr)
             except Exception as inst:
                 self.exc(lr, _("reading delta %s") % short(n), inst, label)
         if not dir:
             ui.progress(_('checking'), None)
 
         if self.havemf:
             for c, m in sorted([(c, m) for m in mflinkrevs
                         for c in mflinkrevs[m]]):
                 if dir:
                     self.err(c, _("parent-directory manifest refers to unknown "
                                   "revision %s") % short(m), label)
                 else:
                     self.err(c, _("changeset refers to unknown revision %s") %
                              short(m), label)
 
         if not dir and subdirnodes:
             self.ui.status(_("checking directory manifests\n"))
             storefiles = set()
             subdirs = set()
             revlogv1 = self.revlogv1
             for f, f2, size in repo.store.datafiles():
                 if not f:
                     self.err(None, _("cannot decode filename '%s'") % f2)
                 elif (size > 0 or not revlogv1) and f.startswith('meta/'):
                     storefiles.add(_normpath(f))
                     subdirs.add(os.path.dirname(f))
             subdircount = len(subdirs)
             currentsubdir = [0]
             def progress():
                 currentsubdir[0] += 1
                 ui.progress(_('checking'), currentsubdir[0], total=subdircount,
                             unit=_('manifests'))
 
         for subdir, linkrevs in subdirnodes.iteritems():
             subdirfilenodes = self._verifymanifest(linkrevs, subdir, storefiles,
                                                    progress)
             for f, onefilenodes in subdirfilenodes.iteritems():
                 filenodes.setdefault(f, {}).update(onefilenodes)
 
         if not dir and subdirnodes:
             ui.progress(_('checking'), None)
             for f in sorted(storefiles):
                 self.warn(_("warning: orphan revlog '%s'") % f)
 
         return filenodes
 
     def _crosscheckfiles(self, filelinkrevs, filenodes):
         repo = self.repo
         ui = self.ui
         ui.status(_("crosschecking files in changesets and manifests\n"))
 
         total = len(filelinkrevs) + len(filenodes)
         count = 0
         if self.havemf:
             for f in sorted(filelinkrevs):
                 count += 1
                 ui.progress(_('crosschecking'), count, total=total)
                 if f not in filenodes:
                     lr = filelinkrevs[f][0]
                     self.err(lr, _("in changeset but not in manifest"), f)
 
         if self.havecl:
             for f in sorted(filenodes):
                 count += 1
                 ui.progress(_('crosschecking'), count, total=total)
                 if f not in filelinkrevs:
                     try:
                         fl = repo.file(f)
                         lr = min([fl.linkrev(fl.rev(n)) for n in filenodes[f]])
                     except Exception:
                         lr = None
                     self.err(lr, _("in manifest but not in changeset"), f)
 
         ui.progress(_('crosschecking'), None)
 
     def _verifyfiles(self, filenodes, filelinkrevs):
         repo = self.repo
         ui = self.ui
         lrugetctx = self.lrugetctx
         revlogv1 = self.revlogv1
         havemf = self.havemf
         ui.status(_("checking files\n"))
 
         storefiles = set()
         for f, f2, size in repo.store.datafiles():
             if not f:
                 self.err(None, _("cannot decode filename '%s'") % f2)
             elif (size > 0 or not revlogv1) and f.startswith('data/'):
                 storefiles.add(_normpath(f))
 
         files = sorted(set(filenodes) | set(filelinkrevs))
         total = len(files)
         revisions = 0
         for i, f in enumerate(files):
             ui.progress(_('checking'), i, item=f, total=total, unit=_('files'))
             try:
                 linkrevs = filelinkrevs[f]
             except KeyError:
                 # in manifest but not in changelog
                 linkrevs = []
 
             if linkrevs:
                 lr = linkrevs[0]
             else:
                 lr = None
 
             try:
                 fl = repo.file(f)
             except error.RevlogError as e:
                 self.err(lr, _("broken revlog! (%s)") % e, f)
                 continue
 
             for ff in fl.files():
                 try:
                     storefiles.remove(ff)
                 except KeyError:
                     self.warn(_(" warning: revlog '%s' not in fncache!") % ff)
                     self.fncachewarned = True
 
             self.checklog(fl, f, lr)
             seen = {}
             rp = None
             for i in fl:
                 revisions += 1
                 n = fl.node(i)
                 lr = self.checkentry(fl, i, n, seen, linkrevs, f)
                 if f in filenodes:
                     if havemf and n not in filenodes[f]:
                         self.err(lr, _("%s not in manifests") % (short(n)), f)
                     else:
                         del filenodes[f][n]
 
                 # Verify contents. 4 cases to care about:
                 #
                 #   common: the most common case
                 #   rename: with a rename
                 #   meta: file content starts with b'\1\n', the metadata
                 #         header defined in filelog.py, but without a rename
                 #   ext: content stored externally
                 #
                 # More formally, their differences are shown below:
                 #
                 #                       | common | rename | meta  | ext
                 #  -------------------------------------------------------
                 #   flags()             | 0      | 0      | 0     | not 0
                 #   renamed()           | False  | True   | False | ?
                 #   rawtext[0:2]=='\1\n'| False  | True   | True  | ?
                 #
                 # "rawtext" means the raw text stored in revlog data, which
                 # could be retrieved by "revision(rev, raw=True)". "text"
                 # mentioned below is "revision(rev, raw=False)".
                 #
                 # There are 3 different lengths stored physically:
                 #  1. L1: rawsize, stored in revlog index
                 #  2. L2: len(rawtext), stored in revlog data
                 #  3. L3: len(text), stored in revlog data if flags==0, or
                 #     possibly somewhere else if flags!=0
                 #
                 # L1 should be equal to L2. L3 could be different from them.
                 # "text" may or may not affect commit hash depending on flag
                 # processors (see revlog.addflagprocessor).
                 #
                 #              | common  | rename | meta  | ext
                 # -------------------------------------------------
                 #    rawsize() | L1      | L1     | L1    | L1
                 #       size() | L1      | L2-LM  | L1(*) | L1 (?)
                 # len(rawtext) | L2      | L2     | L2    | L2
                 #    len(text) | L2      | L2     | L2    | L3
                 #  len(read()) | L2      | L2-LM  | L2-LM | L3 (?)
                 #
                 # LM:  length of metadata, depending on rawtext
                 # (*): not ideal, see comment in filelog.size
                 # (?): could be "- len(meta)" if the resolved content has
                 #      rename metadata
                 #
                 # Checks needed to be done:
                 #  1. length check: L1 == L2, in all cases.
                 #  2. hash check: depending on flag processor, we may need to
                 #     use either "text" (external), or "rawtext" (in revlog).
                 try:
+                    skipflags = self.skipflags
+                    if skipflags:
+                        skipflags &= fl.flags(i)
+                    if not skipflags:
                     fl.read(n) # side effect: read content and do checkhash
                     rp = fl.renamed(n)
                     # the "L1 == L2" check
                     l1 = fl.rawsize(i)
                     l2 = len(fl.revision(n, raw=True))
                     if l1 != l2:
                         self.err(lr, _("unpacked size is %s, %s expected") %
                                  (l2, l1), f)
                 except error.CensoredNodeError:
                     # experimental config: censor.policy
                     if ui.config("censor", "policy", "abort") == "abort":
                         self.err(lr, _("censored file data"), f)
                 except Exception as inst:
                     self.exc(lr, _("unpacking %s") % short(n), inst, f)
 
                 # check renames
                 try:
                     if rp:
                         if lr is not None and ui.verbose:
                             ctx = lrugetctx(lr)
                             found = False
                             for pctx in ctx.parents():
                                 if rp[0] in pctx:
                                     found = True
                                     break
                             if not found:
                                 self.warn(_("warning: copy source of '%s' not"
                                             " in parents of %s") % (f, ctx))
                         fl2 = repo.file(rp[0])
                         if not len(fl2):
                             self.err(lr, _("empty or missing copy source "
                                      "revlog %s:%s") % (rp[0], short(rp[1])), f)
                         elif rp[1] == nullid:
                             ui.note(_("warning: %s@%s: copy source"
                                       " revision is nullid %s:%s\n")
                                 % (f, lr, rp[0], short(rp[1])))
                         else:
                             fl2.rev(rp[1])
                 except Exception as inst:
                     self.exc(lr, _("checking rename of %s") % short(n), inst, f)
 
             # cross-check
             if f in filenodes:
                 fns = [(v, k) for k, v in filenodes[f].iteritems()]
                 for lr, node in sorted(fns):
                     self.err(lr, _("manifest refers to unknown revision %s") %
                              short(node), f)
         ui.progress(_('checking'), None)
 
         for f in sorted(storefiles):
             self.warn(_("warning: orphan revlog '%s'") % f)
 
         return len(files), revisions

tests/test-verify.t

@@ -1,319 +1,363
 prepare repo
 
   $ hg init a
   $ cd a
   $ echo "some text" > FOO.txt
   $ echo "another text" > bar.txt
   $ echo "more text" > QUICK.txt
   $ hg add
   adding FOO.txt
   adding QUICK.txt
   adding bar.txt
   $ hg ci -mtest1
 
 verify
 
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   3 files, 1 changesets, 3 total revisions
 
 verify with journal
 
   $ touch .hg/store/journal
   $ hg verify
   abandoned transaction found - run hg recover
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   3 files, 1 changesets, 3 total revisions
   $ rm .hg/store/journal
 
 introduce some bugs in repo
 
   $ cd .hg/store/data
   $ mv _f_o_o.txt.i X_f_o_o.txt.i
   $ mv bar.txt.i xbar.txt.i
   $ rm _q_u_i_c_k.txt.i
 
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
    warning: revlog 'data/FOO.txt.i' not in fncache!
    0: empty or missing FOO.txt
    FOO.txt@0: manifest refers to unknown revision f62022d3d590
    warning: revlog 'data/QUICK.txt.i' not in fncache!
    0: empty or missing QUICK.txt
    QUICK.txt@0: manifest refers to unknown revision 88b857db8eba
    warning: revlog 'data/bar.txt.i' not in fncache!
    0: empty or missing bar.txt
    bar.txt@0: manifest refers to unknown revision 256559129457
   3 files, 1 changesets, 0 total revisions
   3 warnings encountered!
   hint: run "hg debugrebuildfncache" to recover from corrupt fncache
   6 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
 
   $ cd ../../..
   $ cd ..
 
 Set up a repo for testing missing revlog entries
 
   $ hg init missing-entries
   $ cd missing-entries
   $ echo 0 > file
   $ hg ci -Aqm0
   $ cp -R .hg/store .hg/store-partial
   $ echo 1 > file
   $ hg ci -Aqm1
   $ cp -R .hg/store .hg/store-full
 
 Entire changelog missing
 
   $ rm .hg/store/00changelog.*
   $ hg verify -q
    0: empty or missing changelog
    manifest@0: d0b6632564d4 not in changesets
    manifest@1: 941fc4534185 not in changesets
   3 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Entire manifest log missing
 
   $ rm .hg/store/00manifest.*
   $ hg verify -q
    0: empty or missing manifest
   1 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Entire filelog missing
 
   $ rm .hg/store/data/file.*
   $ hg verify -q
    warning: revlog 'data/file.i' not in fncache!
    0: empty or missing file
    file@0: manifest refers to unknown revision 362fef284ce2
    file@1: manifest refers to unknown revision c10f2164107d
   1 warnings encountered!
   hint: run "hg debugrebuildfncache" to recover from corrupt fncache
   3 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Entire changelog and manifest log missing
 
   $ rm .hg/store/00changelog.*
   $ rm .hg/store/00manifest.*
   $ hg verify -q
   warning: orphan revlog 'data/file.i'
   1 warnings encountered!
   $ cp -R .hg/store-full/. .hg/store
 
 Entire changelog and filelog missing
 
   $ rm .hg/store/00changelog.*
   $ rm .hg/store/data/file.*
   $ hg verify -q
    0: empty or missing changelog
    manifest@0: d0b6632564d4 not in changesets
    manifest@1: 941fc4534185 not in changesets
    warning: revlog 'data/file.i' not in fncache!
    ?: empty or missing file
    file@0: manifest refers to unknown revision 362fef284ce2
    file@1: manifest refers to unknown revision c10f2164107d
   1 warnings encountered!
   hint: run "hg debugrebuildfncache" to recover from corrupt fncache
   6 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Entire manifest log and filelog missing
 
   $ rm .hg/store/00manifest.*
   $ rm .hg/store/data/file.*
   $ hg verify -q
    0: empty or missing manifest
    warning: revlog 'data/file.i' not in fncache!
    0: empty or missing file
   1 warnings encountered!
   hint: run "hg debugrebuildfncache" to recover from corrupt fncache
   2 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Changelog missing entry
 
   $ cp -f .hg/store-partial/00changelog.* .hg/store
   $ hg verify -q
    manifest@?: rev 1 points to nonexistent changeset 1
    manifest@?: 941fc4534185 not in changesets
    file@?: rev 1 points to nonexistent changeset 1
    (expected 0)
   1 warnings encountered!
   3 integrity errors encountered!
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Manifest log missing entry
 
   $ cp -f .hg/store-partial/00manifest.* .hg/store
   $ hg verify -q
    manifest@1: changeset refers to unknown revision 941fc4534185
    file@1: c10f2164107d not in manifests
   2 integrity errors encountered!
   (first damaged changeset appears to be 1)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Filelog missing entry
 
   $ cp -f .hg/store-partial/data/file.* .hg/store/data
   $ hg verify -q
    file@1: manifest refers to unknown revision c10f2164107d
   1 integrity errors encountered!
   (first damaged changeset appears to be 1)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Changelog and manifest log missing entry
 
   $ cp -f .hg/store-partial/00changelog.* .hg/store
   $ cp -f .hg/store-partial/00manifest.* .hg/store
   $ hg verify -q
    file@?: rev 1 points to nonexistent changeset 1
    (expected 0)
    file@?: c10f2164107d not in manifests
   1 warnings encountered!
   2 integrity errors encountered!
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Changelog and filelog missing entry
 
   $ cp -f .hg/store-partial/00changelog.* .hg/store
   $ cp -f .hg/store-partial/data/file.* .hg/store/data
   $ hg verify -q
    manifest@?: rev 1 points to nonexistent changeset 1
    manifest@?: 941fc4534185 not in changesets
    file@?: manifest refers to unknown revision c10f2164107d
   3 integrity errors encountered!
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Manifest and filelog missing entry
 
   $ cp -f .hg/store-partial/00manifest.* .hg/store
   $ cp -f .hg/store-partial/data/file.* .hg/store/data
   $ hg verify -q
    manifest@1: changeset refers to unknown revision 941fc4534185
   1 integrity errors encountered!
   (first damaged changeset appears to be 1)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Corrupt changelog base node to cause failure to read revision
 
   $ printf abcd | dd conv=notrunc of=.hg/store/00changelog.i bs=1 seek=16 \
   >   2> /dev/null
   $ hg verify -q
    0: unpacking changeset 08b1860757c2: * (glob)
    manifest@?: rev 0 points to unexpected changeset 0
    manifest@?: d0b6632564d4 not in changesets
    file@?: rev 0 points to unexpected changeset 0
    (expected 1)
   1 warnings encountered!
   4 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Corrupt manifest log base node to cause failure to read revision
 
   $ printf abcd | dd conv=notrunc of=.hg/store/00manifest.i bs=1 seek=16 \
   >   2> /dev/null
   $ hg verify -q
    manifest@0: reading delta d0b6632564d4: * (glob)
    file@0: 362fef284ce2 not in manifests
   2 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
 Corrupt filelog base node to cause failure to read revision
 
   $ printf abcd | dd conv=notrunc of=.hg/store/data/file.i bs=1 seek=16 \
   >   2> /dev/null
   $ hg verify -q
    file@0: unpacking 362fef284ce2: * (glob)
   1 integrity errors encountered!
   (first damaged changeset appears to be 0)
   [1]
   $ cp -R .hg/store-full/. .hg/store
 
   $ cd ..
 
 test changelog without a manifest
 
   $ hg init b
   $ cd b
   $ hg branch foo
   marked working directory as branch foo
   (branches are permanent and global, did you want a bookmark?)
   $ hg ci -m branchfoo
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   0 files, 1 changesets, 0 total revisions
 
 test revlog corruption
 
   $ touch a
   $ hg add a
   $ hg ci -m a
 
   $ echo 'corrupted' > b
   $ dd if=.hg/store/data/a.i of=start bs=1 count=20 2>/dev/null
   $ cat start b > .hg/store/data/a.i
 
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
    a@1: broken revlog! (index data/a.i is corrupted)
   warning: orphan revlog 'data/a.i'
   1 files, 2 changesets, 0 total revisions
   1 warnings encountered!
   1 integrity errors encountered!
   (first damaged changeset appears to be 1)
   [1]
 
   $ cd ..
 
 test revlog format 0
 
   $ revlog-formatv0.py
   $ cd formatv0
   $ hg verify
   repository uses revlog format 0
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   1 files, 1 changesets, 1 total revisions
   $ cd ..
+
+test flag processor and skipflags
+
+  $ hg init skipflags
+  $ cd skipflags
+  $ cat >> .hg/hgrc <<EOF
+  > [extensions]
+  > flagprocesor=$RUNTESTDIR/flagprocessorext.py
+  > EOF
+  $ echo '[BASE64]content' > base64
+  $ hg commit -Aqm 'flag processor content' base64
+  $ hg verify
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+  1 files, 1 changesets, 1 total revisions
+
+  $ cat >> $TESTTMP/break-base64.py <<EOF
+  > from __future__ import absolute_import
+  > import base64
+  > base64.b64decode=lambda x: x
+  > EOF
+  $ cat >> .hg/hgrc <<EOF
+  > breakbase64=$TESTTMP/break-base64.py
+  > EOF
+
+  $ hg verify
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+   base64@0: unpacking 794cee7777cb: integrity check failed on data/base64.i:0
+  1 files, 1 changesets, 1 total revisions
+  1 integrity errors encountered!
+  (first damaged changeset appears to be 0)
+  [1]
+  $ hg verify --config verify.skipflags=2147483647
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+  1 files, 1 changesets, 1 total revisions
+