subrepo: handle svn tracked/unknown directory collisions

This happens more often than expected. Say you have an svn subrepository with
python code. Python would have generated unknown .pyc files. Now, you rebase
this setup on a revision where a directory containing python code does not
exist. Subversion is first asked to remove this directory when updating, but
will not because it contains untracked items. Then it will have to bring back
the directory after the merge but will fail because it now collides with an
untracked directory.

Using --force is not very elegant and only works with svn >= 1.5 but the only
alternative I can think of is to write our own purge command for subversion.

mercurial/subrepo.py

@@ -1,1032 +1,1046
 # subrepo.py - sub-repository handling for Mercurial
 #
 # Copyright 2009-2010 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.
 
 import errno, os, re, xml.dom.minidom, shutil, urlparse, posixpath
 import stat, subprocess, tarfile
 from i18n import _
 import config, util, node, error, cmdutil
 hg = None
+propertycache = util.propertycache
 
 nullstate = ('', '', 'empty')
 
 def state(ctx, ui):
     """return a state dict, mapping subrepo paths configured in .hgsub
     to tuple: (source from .hgsub, revision from .hgsubstate, kind
     (key in types dict))
     """
     p = config.config()
     def read(f, sections=None, remap=None):
         if f in ctx:
             try:
                 data = ctx[f].data()
             except IOError, err:
                 if err.errno != errno.ENOENT:
                     raise
                 # handle missing subrepo spec files as removed
                 ui.warn(_("warning: subrepo spec file %s not found\n") % f)
                 return
             p.parse(f, data, sections, remap, read)
         else:
             raise util.Abort(_("subrepo spec file %s not found") % f)
 
     if '.hgsub' in ctx:
         read('.hgsub')
 
     for path, src in ui.configitems('subpaths'):
         p.set('subpaths', path, src, ui.configsource('subpaths', path))
 
     rev = {}
     if '.hgsubstate' in ctx:
         try:
             for l in ctx['.hgsubstate'].data().splitlines():
                 revision, path = l.split(" ", 1)
                 rev[path] = revision
         except IOError, err:
             if err.errno != errno.ENOENT:
                 raise
 
     state = {}
     for path, src in p[''].items():
         kind = 'hg'
         if src.startswith('['):
             if ']' not in src:
                 raise util.Abort(_('missing ] in subrepo source'))
             kind, src = src.split(']', 1)
             kind = kind[1:]
 
         for pattern, repl in p.items('subpaths'):
             # Turn r'C:\foo\bar' into r'C:\\foo\\bar' since re.sub
             # does a string decode.
             repl = repl.encode('string-escape')
             # However, we still want to allow back references to go
             # through unharmed, so we turn r'\\1' into r'\1'. Again,
             # extra escapes are needed because re.sub string decodes.
             repl = re.sub(r'\\\\([0-9]+)', r'\\\1', repl)
             try:
                 src = re.sub(pattern, repl, src, 1)
             except re.error, e:
                 raise util.Abort(_("bad subrepository pattern in %s: %s")
                                  % (p.source('subpaths', pattern), e))
 
         state[path] = (src.strip(), rev.get(path, ''), kind)
 
     return state
 
 def writestate(repo, state):
     """rewrite .hgsubstate in (outer) repo with these subrepo states"""
     repo.wwrite('.hgsubstate',
                 ''.join(['%s %s\n' % (state[s][1], s)
                          for s in sorted(state)]), '')
 
 def submerge(repo, wctx, mctx, actx, overwrite):
     """delegated from merge.applyupdates: merging of .hgsubstate file
     in working context, merging context and ancestor context"""
     if mctx == actx: # backwards?
         actx = wctx.p1()
     s1 = wctx.substate
     s2 = mctx.substate
     sa = actx.substate
     sm = {}
 
     repo.ui.debug("subrepo merge %s %s %s\n" % (wctx, mctx, actx))
 
     def debug(s, msg, r=""):
         if r:
             r = "%s:%s:%s" % r
         repo.ui.debug("  subrepo %s: %s %s\n" % (s, msg, r))
 
     for s, l in s1.items():
         a = sa.get(s, nullstate)
         ld = l # local state with possible dirty flag for compares
         if wctx.sub(s).dirty():
             ld = (l[0], l[1] + "+")
         if wctx == actx: # overwrite
             a = ld
 
         if s in s2:
             r = s2[s]
             if ld == r or r == a: # no change or local is newer
                 sm[s] = l
                 continue
             elif ld == a: # other side changed
                 debug(s, "other changed, get", r)
                 wctx.sub(s).get(r, overwrite)
                 sm[s] = r
             elif ld[0] != r[0]: # sources differ
                 if repo.ui.promptchoice(
                     _(' subrepository sources for %s differ\n'
                       'use (l)ocal source (%s) or (r)emote source (%s)?')
                       % (s, l[0], r[0]),
                       (_('&Local'), _('&Remote')), 0):
                     debug(s, "prompt changed, get", r)
                     wctx.sub(s).get(r, overwrite)
                     sm[s] = r
             elif ld[1] == a[1]: # local side is unchanged
                 debug(s, "other side changed, get", r)
                 wctx.sub(s).get(r, overwrite)
                 sm[s] = r
             else:
                 debug(s, "both sides changed, merge with", r)
                 wctx.sub(s).merge(r)
                 sm[s] = l
         elif ld == a: # remote removed, local unchanged
             debug(s, "remote removed, remove")
             wctx.sub(s).remove()
         else:
             if repo.ui.promptchoice(
                 _(' local changed subrepository %s which remote removed\n'
                   'use (c)hanged version or (d)elete?') % s,
                 (_('&Changed'), _('&Delete')), 0):
                 debug(s, "prompt remove")
                 wctx.sub(s).remove()
 
     for s, r in s2.items():
         if s in s1:
             continue
         elif s not in sa:
             debug(s, "remote added, get", r)
             mctx.sub(s).get(r)
             sm[s] = r
         elif r != sa[s]:
             if repo.ui.promptchoice(
                 _(' remote changed subrepository %s which local removed\n'
                   'use (c)hanged version or (d)elete?') % s,
                 (_('&Changed'), _('&Delete')), 0) == 0:
                 debug(s, "prompt recreate", r)
                 wctx.sub(s).get(r)
                 sm[s] = r
 
     # record merged .hgsubstate
     writestate(repo, sm)
 
 def _updateprompt(ui, sub, dirty, local, remote):
     if dirty:
         msg = (_(' subrepository sources for %s differ\n'
                  'use (l)ocal source (%s) or (r)emote source (%s)?\n')
                % (subrelpath(sub), local, remote))
     else:
         msg = (_(' subrepository sources for %s differ (in checked out version)\n'
                  'use (l)ocal source (%s) or (r)emote source (%s)?\n')
                % (subrelpath(sub), local, remote))
     return ui.promptchoice(msg, (_('&Local'), _('&Remote')), 0)
 
 def reporelpath(repo):
     """return path to this (sub)repo as seen from outermost repo"""
     parent = repo
     while hasattr(parent, '_subparent'):
         parent = parent._subparent
     return repo.root[len(parent.root)+1:]
 
 def subrelpath(sub):
     """return path to this subrepo as seen from outermost repo"""
     if hasattr(sub, '_relpath'):
         return sub._relpath
     if not hasattr(sub, '_repo'):
         return sub._path
     return reporelpath(sub._repo)
 
 def _abssource(repo, push=False, abort=True):
     """return pull/push path of repo - either based on parent repo .hgsub info
     or on the top repo config. Abort or return None if no source found."""
     if hasattr(repo, '_subparent'):
         source = repo._subsource
         if source.startswith('/') or '://' in source:
             return source
         parent = _abssource(repo._subparent, push, abort=False)
         if parent:
             if '://' in parent:
                 if parent[-1] == '/':
                     parent = parent[:-1]
                 r = urlparse.urlparse(parent + '/' + source)
                 if parent.startswith('ssh://'):
                     host, path = r[2][2:].split('/', 1)
                     r2 = '//%s/%s' % (host, posixpath.normpath(path))
                 else:
                     r2 = posixpath.normpath(r[2])
                 r = urlparse.urlunparse((r[0], r[1], r2,
                                          r[3], r[4], r[5]))
                 return r
             else: # plain file system path
                 return posixpath.normpath(os.path.join(parent, repo._subsource))
     else: # recursion reached top repo
         if hasattr(repo, '_subtoppath'):
             return repo._subtoppath
         if push and repo.ui.config('paths', 'default-push'):
             return repo.ui.config('paths', 'default-push')
         if repo.ui.config('paths', 'default'):
             return repo.ui.config('paths', 'default')
     if abort:
         raise util.Abort(_("default path for subrepository %s not found") %
             reporelpath(repo))
 
 def itersubrepos(ctx1, ctx2):
     """find subrepos in ctx1 or ctx2"""
     # Create a (subpath, ctx) mapping where we prefer subpaths from
     # ctx1. The subpaths from ctx2 are important when the .hgsub file
     # has been modified (in ctx2) but not yet committed (in ctx1).
     subpaths = dict.fromkeys(ctx2.substate, ctx2)
     subpaths.update(dict.fromkeys(ctx1.substate, ctx1))
     for subpath, ctx in sorted(subpaths.iteritems()):
         yield subpath, ctx.sub(subpath)
 
 def subrepo(ctx, path):
     """return instance of the right subrepo class for subrepo in path"""
     # subrepo inherently violates our import layering rules
     # because it wants to make repo objects from deep inside the stack
     # so we manually delay the circular imports to not break
     # scripts that don't use our demand-loading
     global hg
     import hg as h
     hg = h
 
     util.path_auditor(ctx._repo.root)(path)
     state = ctx.substate.get(path, nullstate)
     if state[2] not in types:
         raise util.Abort(_('unknown subrepo type %s') % state[2])
     return types[state[2]](ctx, path, state[:2])
 
 # subrepo classes need to implement the following abstract class:
 
 class abstractsubrepo(object):
 
     def dirty(self, ignoreupdate=False):
         """returns true if the dirstate of the subrepo is dirty or does not
         match current stored state. If ignoreupdate is true, only check
         whether the subrepo has uncommitted changes in its dirstate.
         """
         raise NotImplementedError
 
     def checknested(self, path):
         """check if path is a subrepository within this repository"""
         return False
 
     def commit(self, text, user, date):
         """commit the current changes to the subrepo with the given
         log message. Use given user and date if possible. Return the
         new state of the subrepo.
         """
         raise NotImplementedError
 
     def remove(self):
         """remove the subrepo
 
         (should verify the dirstate is not dirty first)
         """
         raise NotImplementedError
 
     def get(self, state, overwrite=False):
         """run whatever commands are needed to put the subrepo into
         this state
         """
         raise NotImplementedError
 
     def merge(self, state):
         """merge currently-saved state with the new state."""
         raise NotImplementedError
 
     def push(self, force):
         """perform whatever action is analogous to 'hg push'
 
         This may be a no-op on some systems.
         """
         raise NotImplementedError
 
     def add(self, ui, match, dryrun, prefix):
         return []
 
     def status(self, rev2, **opts):
         return [], [], [], [], [], [], []
 
     def diff(self, diffopts, node2, match, prefix, **opts):
         pass
 
     def outgoing(self, ui, dest, opts):
         return 1
 
     def incoming(self, ui, source, opts):
         return 1
 
     def files(self):
         """return filename iterator"""
         raise NotImplementedError
 
     def filedata(self, name):
         """return file data"""
         raise NotImplementedError
 
     def fileflags(self, name):
         """return file flags"""
         return ''
 
     def archive(self, ui, archiver, prefix):
         files = self.files()
         total = len(files)
         relpath = subrelpath(self)
         ui.progress(_('archiving (%s)') % relpath, 0,
                     unit=_('files'), total=total)
         for i, name in enumerate(files):
             flags = self.fileflags(name)
             mode = 'x' in flags and 0755 or 0644
             symlink = 'l' in flags
             archiver.addfile(os.path.join(prefix, self._path, name),
                              mode, symlink, self.filedata(name))
             ui.progress(_('archiving (%s)') % relpath, i + 1,
                         unit=_('files'), total=total)
         ui.progress(_('archiving (%s)') % relpath, None)
 
 
 class hgsubrepo(abstractsubrepo):
     def __init__(self, ctx, path, state):
         self._path = path
         self._state = state
         r = ctx._repo
         root = r.wjoin(path)
         create = False
         if not os.path.exists(os.path.join(root, '.hg')):
             create = True
             util.makedirs(root)
         self._repo = hg.repository(r.ui, root, create=create)
         self._repo._subparent = r
         self._repo._subsource = state[0]
 
         if create:
             fp = self._repo.opener("hgrc", "w", text=True)
             fp.write('[paths]\n')
 
             def addpathconfig(key, value):
                 if value:
                     fp.write('%s = %s\n' % (key, value))
                     self._repo.ui.setconfig('paths', key, value)
 
             defpath = _abssource(self._repo, abort=False)
             defpushpath = _abssource(self._repo, True, abort=False)
             addpathconfig('default', defpath)
             if defpath != defpushpath:
                 addpathconfig('default-push', defpushpath)
             fp.close()
 
     def add(self, ui, match, dryrun, prefix):
         return cmdutil.add(ui, self._repo, match, dryrun, True,
                            os.path.join(prefix, self._path))
 
     def status(self, rev2, **opts):
         try:
             rev1 = self._state[1]
             ctx1 = self._repo[rev1]
             ctx2 = self._repo[rev2]
             return self._repo.status(ctx1, ctx2, **opts)
         except error.RepoLookupError, inst:
             self._repo.ui.warn(_('warning: error "%s" in subrepository "%s"\n')
                                % (inst, subrelpath(self)))
             return [], [], [], [], [], [], []
 
     def diff(self, diffopts, node2, match, prefix, **opts):
         try:
             node1 = node.bin(self._state[1])
             # We currently expect node2 to come from substate and be
             # in hex format
             if node2 is not None:
                 node2 = node.bin(node2)
             cmdutil.diffordiffstat(self._repo.ui, self._repo, diffopts,
                                    node1, node2, match,
                                    prefix=os.path.join(prefix, self._path),
                                    listsubrepos=True, **opts)
         except error.RepoLookupError, inst:
             self._repo.ui.warn(_('warning: error "%s" in subrepository "%s"\n')
                                % (inst, subrelpath(self)))
 
     def archive(self, ui, archiver, prefix):
         abstractsubrepo.archive(self, ui, archiver, prefix)
 
         rev = self._state[1]
         ctx = self._repo[rev]
         for subpath in ctx.substate:
             s = subrepo(ctx, subpath)
             s.archive(ui, archiver, os.path.join(prefix, self._path))
 
     def dirty(self, ignoreupdate=False):
         r = self._state[1]
         if r == '' and not ignoreupdate: # no state recorded
             return True
         w = self._repo[None]
         if w.p1() != self._repo[r] and not ignoreupdate:
             # different version checked out
             return True
         return w.dirty() # working directory changed
 
     def checknested(self, path):
         return self._repo._checknested(self._repo.wjoin(path))
 
     def commit(self, text, user, date):
         self._repo.ui.debug("committing subrepo %s\n" % subrelpath(self))
         n = self._repo.commit(text, user, date)
         if not n:
             return self._repo['.'].hex() # different version checked out
         return node.hex(n)
 
     def remove(self):
         # we can't fully delete the repository as it may contain
         # local-only history
         self._repo.ui.note(_('removing subrepo %s\n') % subrelpath(self))
         hg.clean(self._repo, node.nullid, False)
 
     def _get(self, state):
         source, revision, kind = state
         try:
             self._repo.lookup(revision)
         except error.RepoError:
             self._repo._subsource = source
             srcurl = _abssource(self._repo)
             self._repo.ui.status(_('pulling subrepo %s from %s\n')
                                  % (subrelpath(self), srcurl))
             other = hg.repository(self._repo.ui, srcurl)
             self._repo.pull(other)
 
     def get(self, state, overwrite=False):
         self._get(state)
         source, revision, kind = state
         self._repo.ui.debug("getting subrepo %s\n" % self._path)
         hg.clean(self._repo, revision, False)
 
     def merge(self, state):
         self._get(state)
         cur = self._repo['.']
         dst = self._repo[state[1]]
         anc = dst.ancestor(cur)
 
         def mergefunc():
             if anc == cur:
                 self._repo.ui.debug("updating subrepo %s\n" % subrelpath(self))
                 hg.update(self._repo, state[1])
             elif anc == dst:
                 self._repo.ui.debug("skipping subrepo %s\n" % subrelpath(self))
             else:
                 self._repo.ui.debug("merging subrepo %s\n" % subrelpath(self))
                 hg.merge(self._repo, state[1], remind=False)
 
         wctx = self._repo[None]
         if self.dirty():
             if anc != dst:
                 if _updateprompt(self._repo.ui, self, wctx.dirty(), cur, dst):
                     mergefunc()
             else:
                 mergefunc()
         else:
             mergefunc()
 
     def push(self, force):
         # push subrepos depth-first for coherent ordering
         c = self._repo['']
         subs = c.substate # only repos that are committed
         for s in sorted(subs):
             if not c.sub(s).push(force):
                 return False
 
         dsturl = _abssource(self._repo, True)
         self._repo.ui.status(_('pushing subrepo %s to %s\n') %
             (subrelpath(self), dsturl))
         other = hg.repository(self._repo.ui, dsturl)
         return self._repo.push(other, force)
 
     def outgoing(self, ui, dest, opts):
         return hg.outgoing(ui, self._repo, _abssource(self._repo, True), opts)
 
     def incoming(self, ui, source, opts):
         return hg.incoming(ui, self._repo, _abssource(self._repo, False), opts)
 
     def files(self):
         rev = self._state[1]
         ctx = self._repo[rev]
         return ctx.manifest()
 
     def filedata(self, name):
         rev = self._state[1]
         return self._repo[rev][name].data()
 
     def fileflags(self, name):
         rev = self._state[1]
         ctx = self._repo[rev]
         return ctx.flags(name)
 
 
 class svnsubrepo(abstractsubrepo):
     def __init__(self, ctx, path, state):
         self._path = path
         self._state = state
         self._ctx = ctx
         self._ui = ctx._repo.ui
 
     def _svncommand(self, commands, filename=''):
-        path = os.path.join(self._ctx._repo.origroot, self._path, filename)
         cmd = ['svn']
         # Starting in svn 1.5 --non-interactive is a global flag
         # instead of being per-command, but we need to support 1.4 so
         # we have to be intelligent about what commands take
         # --non-interactive.
         if (not self._ui.interactive() and
             commands[0] in ('update', 'checkout', 'commit')):
             cmd.append('--non-interactive')
         cmd.extend(commands)
+        if filename is not None:
+            path = os.path.join(self._ctx._repo.origroot, self._path, filename)
         cmd.append(path)
         env = dict(os.environ)
         # Avoid localized output, preserve current locale for everything else.
         env['LC_MESSAGES'] = 'C'
         p = subprocess.Popen(cmd, bufsize=-1, close_fds=util.closefds,
                              stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                              universal_newlines=True, env=env)
         stdout, stderr = p.communicate()
         stderr = stderr.strip()
         if stderr:
             raise util.Abort(stderr)
         return stdout
 
+    @propertycache
+    def _svnversion(self):
+        output = self._svncommand(['--version'], filename=None)
+        m = re.search(r'^svn,\s+version\s+(\d+)\.(\d+)', output)
+        if not m:
+            raise util.Abort(_('cannot retrieve svn tool version'))
+        return (int(m.group(1)), int(m.group(2)))
+
     def _wcrevs(self):
         # Get the working directory revision as well as the last
         # commit revision so we can compare the subrepo state with
         # both. We used to store the working directory one.
         output = self._svncommand(['info', '--xml'])
         doc = xml.dom.minidom.parseString(output)
         entries = doc.getElementsByTagName('entry')
         lastrev, rev = '0', '0'
         if entries:
             rev = str(entries[0].getAttribute('revision')) or '0'
             commits = entries[0].getElementsByTagName('commit')
             if commits:
                 lastrev = str(commits[0].getAttribute('revision')) or '0'
         return (lastrev, rev)
 
     def _wcrev(self):
         return self._wcrevs()[0]
 
     def _wcchanged(self):
         """Return (changes, extchanges) where changes is True
         if the working directory was changed, and extchanges is
         True if any of these changes concern an external entry.
         """
         output = self._svncommand(['status', '--xml'])
         externals, changes = [], []
         doc = xml.dom.minidom.parseString(output)
         for e in doc.getElementsByTagName('entry'):
             s = e.getElementsByTagName('wc-status')
             if not s:
                 continue
             item = s[0].getAttribute('item')
             props = s[0].getAttribute('props')
             path = e.getAttribute('path')
             if item == 'external':
                 externals.append(path)
             if (item not in ('', 'normal', 'unversioned', 'external')
                 or props not in ('', 'none')):
                 changes.append(path)
         for path in changes:
             for ext in externals:
                 if path == ext or path.startswith(ext + os.sep):
                     return True, True
         return bool(changes), False
 
     def dirty(self, ignoreupdate=False):
         if not self._wcchanged()[0]:
             if self._state[1] in self._wcrevs() or ignoreupdate:
                 return False
         return True
 
     def commit(self, text, user, date):
         # user and date are out of our hands since svn is centralized
         changed, extchanged = self._wcchanged()
         if not changed:
             return self._wcrev()
         if extchanged:
             # Do not try to commit externals
             raise util.Abort(_('cannot commit svn externals'))
         commitinfo = self._svncommand(['commit', '-m', text])
         self._ui.status(commitinfo)
         newrev = re.search('Committed revision ([0-9]+).', commitinfo)
         if not newrev:
             raise util.Abort(commitinfo.splitlines()[-1])
         newrev = newrev.groups()[0]
         self._ui.status(self._svncommand(['update', '-r', newrev]))
         return newrev
 
     def remove(self):
         if self.dirty():
             self._ui.warn(_('not removing repo %s because '
                             'it has changes.\n' % self._path))
             return
         self._ui.note(_('removing subrepo %s\n') % self._path)
 
         def onerror(function, path, excinfo):
             if function is not os.remove:
                 raise
             # read-only files cannot be unlinked under Windows
             s = os.stat(path)
             if (s.st_mode & stat.S_IWRITE) != 0:
                 raise
             os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE)
             os.remove(path)
 
         path = self._ctx._repo.wjoin(self._path)
         shutil.rmtree(path, onerror=onerror)
         try:
             os.removedirs(os.path.dirname(path))
         except OSError:
             pass
 
     def get(self, state, overwrite=False):
         if overwrite:
             self._svncommand(['revert', '--recursive'])
-        status = self._svncommand(['checkout', state[0], '--revision', state[1]])
+        args = ['checkout']
+        if self._svnversion >= (1, 5):
+            args.append('--force')
+        args.extend([state[0], '--revision', state[1]])
+        status = self._svncommand(args)
         if not re.search('Checked out revision [0-9]+.', status):
             raise util.Abort(status.splitlines()[-1])
         self._ui.status(status)
 
     def merge(self, state):
         old = self._state[1]
         new = state[1]
         if new != self._wcrev():
             dirty = old == self._wcrev() or self._wcchanged()[0]
             if _updateprompt(self._ui, self, dirty, self._wcrev(), new):
                 self.get(state, False)
 
     def push(self, force):
         # push is a no-op for SVN
         return True
 
     def files(self):
         output = self._svncommand(['list'])
         # This works because svn forbids \n in filenames.
         return output.splitlines()
 
     def filedata(self, name):
         return self._svncommand(['cat'], name)
 
 
 class gitsubrepo(abstractsubrepo):
     def __init__(self, ctx, path, state):
         # TODO add git version check.
         self._state = state
         self._ctx = ctx
         self._path = path
         self._relpath = os.path.join(reporelpath(ctx._repo), path)
         self._abspath = ctx._repo.wjoin(path)
         self._subparent = ctx._repo
         self._ui = ctx._repo.ui
 
     def _gitcommand(self, commands, env=None, stream=False):
         return self._gitdir(commands, env=env, stream=stream)[0]
 
     def _gitdir(self, commands, env=None, stream=False):
         return self._gitnodir(commands, env=env, stream=stream,
                               cwd=self._abspath)
 
     def _gitnodir(self, commands, env=None, stream=False, cwd=None):
         """Calls the git command
 
         The methods tries to call the git command. versions previor to 1.6.0
         are not supported and very probably fail.
         """
         self._ui.debug('%s: git %s\n' % (self._relpath, ' '.join(commands)))
         # unless ui.quiet is set, print git's stderr,
         # which is mostly progress and useful info
         errpipe = None
         if self._ui.quiet:
             errpipe = open(os.devnull, 'w')
         p = subprocess.Popen(['git'] + commands, bufsize=-1, cwd=cwd, env=env,
                              close_fds=util.closefds,
                              stdout=subprocess.PIPE, stderr=errpipe)
         if stream:
             return p.stdout, None
 
         retdata = p.stdout.read().strip()
         # wait for the child to exit to avoid race condition.
         p.wait()
 
         if p.returncode != 0 and p.returncode != 1:
             # there are certain error codes that are ok
             command = commands[0]
             if command in ('cat-file', 'symbolic-ref'):
                 return retdata, p.returncode
             # for all others, abort
             raise util.Abort('git %s error %d in %s' %
                              (command, p.returncode, self._relpath))
 
         return retdata, p.returncode
 
     def _gitmissing(self):
         return not os.path.exists(os.path.join(self._abspath, '.git'))
 
     def _gitstate(self):
         return self._gitcommand(['rev-parse', 'HEAD'])
 
     def _gitcurrentbranch(self):
         current, err = self._gitdir(['symbolic-ref', 'HEAD', '--quiet'])
         if err:
             current = None
         return current
 
     def _githavelocally(self, revision):
         out, code = self._gitdir(['cat-file', '-e', revision])
         return code == 0
 
     def _gitisancestor(self, r1, r2):
         base = self._gitcommand(['merge-base', r1, r2])
         return base == r1
 
     def _gitbranchmap(self):
         '''returns 2 things:
         a map from git branch to revision
         a map from revision to branches'''
         branch2rev = {}
         rev2branch = {}
 
         out = self._gitcommand(['for-each-ref', '--format',
                                 '%(objectname) %(refname)'])
         for line in out.split('\n'):
             revision, ref = line.split(' ')
             if (not ref.startswith('refs/heads/') and
                 not ref.startswith('refs/remotes/')):
                 continue
             if ref.startswith('refs/remotes/') and ref.endswith('/HEAD'):
                 continue # ignore remote/HEAD redirects
             branch2rev[ref] = revision
             rev2branch.setdefault(revision, []).append(ref)
         return branch2rev, rev2branch
 
     def _gittracking(self, branches):
         'return map of remote branch to local tracking branch'
         # assumes no more than one local tracking branch for each remote
         tracking = {}
         for b in branches:
             if b.startswith('refs/remotes/'):
                 continue
             remote = self._gitcommand(['config', 'branch.%s.remote' % b])
             if remote:
                 ref = self._gitcommand(['config', 'branch.%s.merge' % b])
                 tracking['refs/remotes/%s/%s' %
                          (remote, ref.split('/', 2)[2])] = b
         return tracking
 
     def _abssource(self, source):
         if '://' not in source:
             # recognize the scp syntax as an absolute source
             colon = source.find(':')
             if colon != -1 and '/' not in source[:colon]:
                 return source
         self._subsource = source
         return _abssource(self)
 
     def _fetch(self, source, revision):
         if self._gitmissing():
             self._ui.status(_('cloning subrepo %s\n') % self._relpath)
             self._gitnodir(['clone', self._abssource(source), self._abspath])
         if self._githavelocally(revision):
             return
         self._ui.status(_('pulling subrepo %s\n') % self._relpath)
         # try only origin: the originally cloned repo
         self._gitcommand(['fetch'])
         if not self._githavelocally(revision):
             raise util.Abort(_("revision %s does not exist in subrepo %s\n") %
                                (revision, self._relpath))
 
     def dirty(self, ignoreupdate=False):
         if self._gitmissing():
             return True
         if not ignoreupdate and self._state[1] != self._gitstate():
             # different version checked out
             return True
         # check for staged changes or modified files; ignore untracked files
         out, code = self._gitdir(['diff-index', '--quiet', 'HEAD'])
         return code == 1
 
     def get(self, state, overwrite=False):
         source, revision, kind = state
         self._fetch(source, revision)
         # if the repo was set to be bare, unbare it
         if self._gitcommand(['config', '--bool', 'core.bare']) == 'true':
             self._gitcommand(['config', 'core.bare', 'false'])
             if self._gitstate() == revision:
                 self._gitcommand(['reset', '--hard', 'HEAD'])
                 return
         elif self._gitstate() == revision:
             if overwrite:
                 # first reset the index to unmark new files for commit, because 
                 # reset --hard will otherwise throw away files added for commit,
                 # not just unmark them.
                 self._gitcommand(['reset', 'HEAD'])
                 self._gitcommand(['reset', '--hard', 'HEAD'])
             return
         branch2rev, rev2branch = self._gitbranchmap()
 
         def checkout(args):
             cmd = ['checkout']
             if overwrite:
                 # first reset the index to unmark new files for commit, because
                 # the -f option will otherwise throw away files added for
                 # commit, not just unmark them.
                 self._gitcommand(['reset', 'HEAD'])
                 cmd.append('-f')
             self._gitcommand(cmd + args)
 
         def rawcheckout():
             # no branch to checkout, check it out with no branch
             self._ui.warn(_('checking out detached HEAD in subrepo %s\n') %
                           self._relpath)
             self._ui.warn(_('check out a git branch if you intend '
                             'to make changes\n'))
             checkout(['-q', revision])
 
         if revision not in rev2branch:
             rawcheckout()
             return
         branches = rev2branch[revision]
         firstlocalbranch = None
         for b in branches:
             if b == 'refs/heads/master':
                 # master trumps all other branches
                 checkout(['refs/heads/master'])
                 return
             if not firstlocalbranch and not b.startswith('refs/remotes/'):
                 firstlocalbranch = b
         if firstlocalbranch:
             checkout([firstlocalbranch])
             return
 
         tracking = self._gittracking(branch2rev.keys())
         # choose a remote branch already tracked if possible
         remote = branches[0]
         if remote not in tracking:
             for b in branches:
                 if b in tracking:
                     remote = b
                     break
 
         if remote not in tracking:
             # create a new local tracking branch
             local = remote.split('/', 2)[2]
             checkout(['-b', local, remote])
         elif self._gitisancestor(branch2rev[tracking[remote]], remote):
             # When updating to a tracked remote branch,
             # if the local tracking branch is downstream of it,
             # a normal `git pull` would have performed a "fast-forward merge"
             # which is equivalent to updating the local branch to the remote.
             # Since we are only looking at branching at update, we need to
             # detect this situation and perform this action lazily.
             if tracking[remote] != self._gitcurrentbranch():
                 checkout([tracking[remote]])
             self._gitcommand(['merge', '--ff', remote])
         else:
             # a real merge would be required, just checkout the revision
             rawcheckout()
 
     def commit(self, text, user, date):
         if self._gitmissing():
             raise util.Abort(_("subrepo %s is missing") % self._relpath)
         cmd = ['commit', '-a', '-m', text]
         env = os.environ.copy()
         if user:
             cmd += ['--author', user]
         if date:
             # git's date parser silently ignores when seconds < 1e9
             # convert to ISO8601
             env['GIT_AUTHOR_DATE'] = util.datestr(date,
                                                   '%Y-%m-%dT%H:%M:%S %1%2')
         self._gitcommand(cmd, env=env)
         # make sure commit works otherwise HEAD might not exist under certain
         # circumstances
         return self._gitstate()
 
     def merge(self, state):
         source, revision, kind = state
         self._fetch(source, revision)
         base = self._gitcommand(['merge-base', revision, self._state[1]])
         out, code = self._gitdir(['diff-index', '--quiet', 'HEAD'])
 
         def mergefunc():
             if base == revision:
                 self.get(state) # fast forward merge
             elif base != self._state[1]:
                 self._gitcommand(['merge', '--no-commit', revision])
 
         if self.dirty():
             if self._gitstate() != revision:
                 dirty = self._gitstate() == self._state[1] or code != 0
                 if _updateprompt(self._ui, self, dirty,
                                  self._state[1][:7], revision[:7]):
                     mergefunc()
         else:
             mergefunc()
 
     def push(self, force):
         if self._gitmissing():
             raise util.Abort(_("subrepo %s is missing") % self._relpath)
         # if a branch in origin contains the revision, nothing to do
         branch2rev, rev2branch = self._gitbranchmap()
         if self._state[1] in rev2branch:
             for b in rev2branch[self._state[1]]:
                 if b.startswith('refs/remotes/origin/'):
                     return True
         for b, revision in branch2rev.iteritems():
             if b.startswith('refs/remotes/origin/'):
                 if self._gitisancestor(self._state[1], revision):
                     return True
         # otherwise, try to push the currently checked out branch
         cmd = ['push']
         if force:
             cmd.append('--force')
 
         current = self._gitcurrentbranch()
         if current:
             # determine if the current branch is even useful
             if not self._gitisancestor(self._state[1], current):
                 self._ui.warn(_('unrelated git branch checked out '
                                 'in subrepo %s\n') % self._relpath)
                 return False
             self._ui.status(_('pushing branch %s of subrepo %s\n') %
                             (current.split('/', 2)[2], self._relpath))
             self._gitcommand(cmd + ['origin', current])
             return True
         else:
             self._ui.warn(_('no branch checked out in subrepo %s\n'
                             'cannot push revision %s') %
                           (self._relpath, self._state[1]))
             return False
 
     def remove(self):
         if self._gitmissing():
             return
         if self.dirty():
             self._ui.warn(_('not removing repo %s because '
                             'it has changes.\n') % self._relpath)
             return
         # we can't fully delete the repository as it may contain
         # local-only history
         self._ui.note(_('removing subrepo %s\n') % self._relpath)
         self._gitcommand(['config', 'core.bare', 'true'])
         for f in os.listdir(self._abspath):
             if f == '.git':
                 continue
             path = os.path.join(self._abspath, f)
             if os.path.isdir(path) and not os.path.islink(path):
                 shutil.rmtree(path)
             else:
                 os.remove(path)
 
     def archive(self, ui, archiver, prefix):
         source, revision = self._state
         self._fetch(source, revision)
 
         # Parse git's native archive command.
         # This should be much faster than manually traversing the trees
         # and objects with many subprocess calls.
         tarstream = self._gitcommand(['archive', revision], stream=True)
         tar = tarfile.open(fileobj=tarstream, mode='r|')
         relpath = subrelpath(self)
         ui.progress(_('archiving (%s)') % relpath, 0, unit=_('files'))
         for i, info in enumerate(tar):
             if info.isdir():
                 continue
             if info.issym():
                 data = info.linkname
             else:
                 data = tar.extractfile(info).read()
             archiver.addfile(os.path.join(prefix, self._path, info.name),
                              info.mode, info.issym(), data)
             ui.progress(_('archiving (%s)') % relpath, i + 1,
                         unit=_('files'))
         ui.progress(_('archiving (%s)') % relpath, None)
 
 
     def status(self, rev2, **opts):
         if self._gitmissing():
             # if the repo is missing, return no results
             return [], [], [], [], [], [], []
         rev1 = self._state[1]
         modified, added, removed = [], [], []
         if rev2:
             command = ['diff-tree', rev1, rev2]
         else:
             command = ['diff-index', rev1]
         out = self._gitcommand(command)
         for line in out.split('\n'):
             tab = line.find('\t')
             if tab == -1:
                 continue
             status, f = line[tab - 1], line[tab + 1:]
             if status == 'M':
                 modified.append(f)
             elif status == 'A':
                 added.append(f)
             elif status == 'D':
                 removed.append(f)
 
         deleted = unknown = ignored = clean = []
         return modified, added, removed, deleted, unknown, ignored, clean
 
 types = {
     'hg': hgsubrepo,
     'svn': svnsubrepo,
     'git': gitsubrepo,
     }

tests/hghave

@@ -1,278 +1,288
 #!/usr/bin/env python
 """Test the running system for features availability. Exit with zero
 if all features are there, non-zero otherwise. If a feature name is
 prefixed with "no-", the absence of feature is tested.
 """
 import optparse
 import os
 import re
 import sys
 import tempfile
 
 tempprefix = 'hg-hghave-'
 
 def matchoutput(cmd, regexp, ignorestatus=False):
     """Return True if cmd executes successfully and its output
     is matched by the supplied regular expression.
     """
     r = re.compile(regexp)
     fh = os.popen(cmd)
     s = fh.read()
     try:
         ret = fh.close()
     except IOError:
         # Happen in Windows test environment
         ret = 1
     return (ignorestatus or ret is None) and r.search(s)
 
 def has_baz():
     return matchoutput('baz --version 2>&1', r'baz Bazaar version')
 
 def has_bzr():
     try:
         import bzrlib
         return bzrlib.__doc__ != None
     except ImportError:
         return False
 
 def has_bzr114():
     try:
         import bzrlib
         return (bzrlib.__doc__ != None
                 and bzrlib.version_info[:2] >= (1, 14))
     except ImportError:
         return False
 
 def has_cvs():
     re = r'Concurrent Versions System.*?server'
     return matchoutput('cvs --version 2>&1', re)
 
 def has_darcs():
     return matchoutput('darcs --version', r'2\.[2-9]', True)
 
 def has_mtn():
     return matchoutput('mtn --version', r'monotone', True) and not matchoutput(
         'mtn --version', r'monotone 0\.(\d|[12]\d|3[01])[^\d]', True)
 
 def has_eol_in_paths():
     try:
         fd, path = tempfile.mkstemp(prefix=tempprefix, suffix='\n\r')
         os.close(fd)
         os.remove(path)
         return True
     except:
         return False
 
 def has_executablebit():
     fd, path = tempfile.mkstemp(prefix=tempprefix)
     os.close(fd)
     try:
         s = os.lstat(path).st_mode
         os.chmod(path, s | 0100)
         return (os.lstat(path).st_mode & 0100 != 0)
     finally:
         os.remove(path)
 
 def has_icasefs():
     # Stolen from mercurial.util
     fd, path = tempfile.mkstemp(prefix=tempprefix, dir='.')
     os.close(fd)
     try:
         s1 = os.stat(path)
         d, b = os.path.split(path)
         p2 = os.path.join(d, b.upper())
         if path == p2:
             p2 = os.path.join(d, b.lower())
         try:
             s2 = os.stat(p2)
             return s2 == s1
         except:
             return False
     finally:
         os.remove(path)
 
 def has_inotify():
     try:
         import hgext.inotify.linux.watcher
         return True
     except ImportError:
         return False
 
 def has_fifo():
     return hasattr(os, "mkfifo")
 
 def has_lsprof():
     try:
         import _lsprof
         return True
     except ImportError:
         return False
 
 def has_gettext():
     return matchoutput('msgfmt --version', 'GNU gettext-tools')
 
 def has_git():
     return matchoutput('git --version 2>&1', r'^git version')
 
 def has_docutils():
     try:
         from docutils.core import publish_cmdline
         return True
     except ImportError:
         return False
 
+def getsvnversion():
+    m = matchoutput('svn --version 2>&1', r'^svn,\s+version\s+(\d+)\.(\d+)')
+    if not m:
+        return (0, 0)
+    return (int(m.group(1)), int(m.group(2)))
+
+def has_svn15():
+    return getsvnversion() >= (1, 5)
+
 def has_svn():
     return matchoutput('svn --version 2>&1', r'^svn, version') and \
         matchoutput('svnadmin --version 2>&1', r'^svnadmin, version')
 
 def has_svn_bindings():
     try:
         import svn.core
         version = svn.core.SVN_VER_MAJOR, svn.core.SVN_VER_MINOR
         if version < (1, 4):
             return False
         return True
     except ImportError:
         return False
 
 def has_p4():
     return matchoutput('p4 -V', r'Rev\. P4/') and matchoutput('p4d -V', r'Rev\. P4D/')
 
 def has_symlink():
     return hasattr(os, "symlink")
 
 def has_tla():
     return matchoutput('tla --version 2>&1', r'The GNU Arch Revision')
 
 def has_gpg():
     return matchoutput('gpg --version 2>&1', r'GnuPG')
 
 def has_unix_permissions():
     d = tempfile.mkdtemp(prefix=tempprefix, dir=".")
     try:
         fname = os.path.join(d, 'foo')
         for umask in (077, 007, 022):
             os.umask(umask)
             f = open(fname, 'w')
             f.close()
             mode = os.stat(fname).st_mode
             os.unlink(fname)
             if mode & 0777 != ~umask & 0666:
                 return False
         return True
     finally:
         os.rmdir(d)
 
 def has_pygments():
     try:
         import pygments
         return True
     except ImportError:
         return False
 
 def has_outer_repo():
     return matchoutput('hg root 2>&1', r'')
 
 def has_ssl():
     try:
         import ssl
         import OpenSSL
         OpenSSL.SSL.Context
         return True
     except ImportError:
         return False
 
 checks = {
     "baz": (has_baz, "GNU Arch baz client"),
     "bzr": (has_bzr, "Canonical's Bazaar client"),
     "bzr114": (has_bzr114, "Canonical's Bazaar client >= 1.14"),
     "cvs": (has_cvs, "cvs client/server"),
     "darcs": (has_darcs, "darcs client"),
     "docutils": (has_docutils, "Docutils text processing library"),
     "eol-in-paths": (has_eol_in_paths, "end-of-lines in paths"),
     "execbit": (has_executablebit, "executable bit"),
     "fifo": (has_fifo, "named pipes"),
     "gettext": (has_gettext, "GNU Gettext (msgfmt)"),
     "git": (has_git, "git command line client"),
     "gpg": (has_gpg, "gpg client"),
     "icasefs": (has_icasefs, "case insensitive file system"),
     "inotify": (has_inotify, "inotify extension support"),
     "lsprof": (has_lsprof, "python lsprof module"),
     "mtn": (has_mtn, "monotone client (> 0.31)"),
     "outer-repo": (has_outer_repo, "outer repo"),
     "p4": (has_p4, "Perforce server and client"),
     "pygments": (has_pygments, "Pygments source highlighting library"),
     "ssl": (has_ssl, "python >= 2.6 ssl module and python OpenSSL"),
     "svn": (has_svn, "subversion client and admin tools"),
+    "svn15": (has_svn15, "subversion client and admin tools >= 1.5"),
     "svn-bindings": (has_svn_bindings, "subversion python bindings"),
     "symlink": (has_symlink, "symbolic links"),
     "tla": (has_tla, "GNU Arch tla client"),
     "unix-permissions": (has_unix_permissions, "unix-style permissions"),
 }
 
 def list_features():
     for name, feature in checks.iteritems():
         desc = feature[1]
         print name + ':', desc
 
 def test_features():
     failed = 0
     for name, feature in checks.iteritems():
         check, _ = feature
         try:
             check()
         except Exception, e:
             print "feature %s failed:  %s" % (name, e)
             failed += 1
     return failed
 
 parser = optparse.OptionParser("%prog [options] [features]")
 parser.add_option("--test-features", action="store_true",
                   help="test available features")
 parser.add_option("--list-features", action="store_true",
                   help="list available features")
 parser.add_option("-q", "--quiet", action="store_true",
                   help="check features silently")
 
 if __name__ == '__main__':
     options, args = parser.parse_args()
     if options.list_features:
         list_features()
         sys.exit(0)
 
     if options.test_features:
         sys.exit(test_features())
 
     quiet = options.quiet
 
     failures = 0
 
     def error(msg):
         global failures
         if not quiet:
             sys.stderr.write(msg + '\n')
         failures += 1
 
     for feature in args:
         negate = feature.startswith('no-')
         if negate:
             feature = feature[3:]
 
         if feature not in checks:
             error('skipped: unknown feature: ' + feature)
             continue
 
         check, desc = checks[feature]
         try:
             available = check()
         except Exception, e:
             error('hghave check failed: ' + feature)
             continue
 
         if not negate and not available:
             error('skipped: missing feature: ' + desc)
         elif negate and available:
             error('skipped: system supports %s' % desc)
 
     if failures != 0:
         sys.exit(1)

tests/test-subrepo-svn.t

@@ -1,440 +1,491
   $ "$TESTDIR/hghave" svn || exit 80
 
   $ fix_path()
   > {
   >     tr '\\' /
   > }
 
 SVN wants all paths to start with a slash. Unfortunately, Windows ones
 don't. Handle that.
 
   $ escapedwd=`pwd | fix_path`
   $ expr "$escapedwd" : '\/' > /dev/null || escapedwd="/$escapedwd"
   $ escapedwd=`python -c "import urllib, sys; sys.stdout.write(urllib.quote(sys.argv[1]))" "$escapedwd"`
 
 create subversion repo
 
   $ SVNREPO="file://$escapedwd/svn-repo"
   $ WCROOT="`pwd`/svn-wc"
   $ svnadmin create svn-repo
   $ svn co "$SVNREPO" svn-wc
   Checked out revision 0.
   $ cd svn-wc
   $ mkdir src
   $ echo alpha > src/alpha
   $ svn add src
   A         src
   A         src/alpha
   $ mkdir externals
   $ echo other > externals/other
   $ svn add externals
   A         externals
   A         externals/other
   $ svn ci -m 'Add alpha'
   Adding         externals
   Adding         externals/other
   Adding         src
   Adding         src/alpha
   Transmitting file data ..
   Committed revision 1.
   $ svn up
   At revision 1.
   $ echo "externals -r1 $SVNREPO/externals" > extdef
   $ svn propset -F extdef svn:externals src
   property 'svn:externals' set on 'src'
   $ svn ci -m 'Setting externals'
   Sending        src
   
   Committed revision 2.
   $ cd ..
 
 create hg repo
 
   $ mkdir sub
   $ cd sub
   $ hg init t
   $ cd t
 
 first revision, no sub
 
   $ echo a > a
   $ hg ci -Am0
   adding a
 
 add first svn sub with leading whitespaces
 
   $ echo "s =        [svn]       $SVNREPO/src" >> .hgsub
   $ echo "subdir/s = [svn]       $SVNREPO/src" >> .hgsub
   $ svn co --quiet "$SVNREPO"/src s
   $ mkdir subdir
   $ svn co --quiet "$SVNREPO"/src subdir/s
   $ hg add .hgsub
   $ hg ci -m1
   committing subrepository s
   committing subrepository subdir/s
 
 make sure we avoid empty commits (issue2445)
 
   $ hg sum
   parent: 1:* tip (glob)
    1
   branch: default
   commit: (clean)
   update: (current)
   $ hg ci -moops
   nothing changed
   [1]
 
 debugsub
 
   $ hg debugsub
   path s
    source   file://*/svn-repo/src (glob)
    revision 2
   path subdir/s
    source   file://*/svn-repo/src (glob)
    revision 2
 
 change file in svn and hg, commit
 
   $ echo a >> a
   $ echo alpha >> s/alpha
   $ hg sum
   parent: 1:* tip (glob)
    1
   branch: default
   commit: 1 modified, 1 subrepos
   update: (current)
   $ hg commit -m 'Message!'
   committing subrepository s
   Sending*s/alpha (glob)
   Transmitting file data .
   Committed revision 3.
   
   Fetching external item into '$TESTTMP/sub/t/s/externals'
   External at revision 1.
   
   At revision 3.
   $ hg debugsub
   path s
    source   file://*/svn-repo/src (glob)
    revision 3
   path subdir/s
    source   file://*/svn-repo/src (glob)
    revision 2
 
 add an unrelated revision in svn and update the subrepo to without
 bringing any changes.
 
   $ svn mkdir "$SVNREPO/unrelated" -m 'create unrelated'
   
   Committed revision 4.
   $ svn up s
   
   Fetching external item into 's/externals'
   External at revision 1.
   
   At revision 4.
   $ hg sum
   parent: 2:* tip (glob)
    Message!
   branch: default
   commit: (clean)
   update: (current)
 
   $ echo a > s/a
 
 should be empty despite change to s/a
 
   $ hg st
 
 add a commit from svn
 
   $ cd "$WCROOT"/src
   $ svn up
   U    alpha
   
   Fetching external item into 'externals'
   A    externals/other
   Updated external to revision 1.
   
   Updated to revision 4.
   $ echo xyz >> alpha
   $ svn propset svn:mime-type 'text/xml' alpha
   property 'svn:mime-type' set on 'alpha'
   $ svn ci -m 'amend a from svn'
   Sending        src/alpha
   Transmitting file data .
   Committed revision 5.
   $ cd ../../sub/t
 
 this commit from hg will fail
 
   $ echo zzz >> s/alpha
   $ hg ci -m 'amend alpha from hg'
   committing subrepository s
   abort: svn: Commit failed (details follow):
   svn: (Out of date)?.*/src/alpha.*(is out of date)? (re)
   [255]
   $ svn revert -q s/alpha
 
 this commit fails because of meta changes
 
   $ svn propset svn:mime-type 'text/html' s/alpha
   property 'svn:mime-type' set on 's/alpha'
   $ hg ci -m 'amend alpha from hg'
   committing subrepository s
   abort: svn: Commit failed (details follow):
   svn: (Out of date)?.*/src/alpha.*(is out of date)? (re)
   [255]
   $ svn revert -q s/alpha
 
 this commit fails because of externals changes
 
   $ echo zzz > s/externals/other
   $ hg ci -m 'amend externals from hg'
   committing subrepository s
   abort: cannot commit svn externals
   [255]
   $ hg diff --subrepos -r 1:2 | grep -v diff
   --- a/.hgsubstate	Thu Jan 01 00:00:00 1970 +0000
   +++ b/.hgsubstate	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,2 +1,2 @@
   -2 s
   +3 s
    2 subdir/s
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,2 @@
    a
   +a
   $ svn revert -q s/externals/other
 
 this commit fails because of externals meta changes
 
   $ svn propset svn:mime-type 'text/html' s/externals/other
   property 'svn:mime-type' set on 's/externals/other'
   $ hg ci -m 'amend externals from hg'
   committing subrepository s
   abort: cannot commit svn externals
   [255]
   $ svn revert -q s/externals/other
 
 clone
 
   $ cd ..
   $ hg clone t tc | fix_path
   updating to branch default
   A    tc/subdir/s/alpha
    U   tc/subdir/s
   
   Fetching external item into 'tc/subdir/s/externals'
   A    tc/subdir/s/externals/other
   Checked out external at revision 1.
   
   Checked out revision 2.
   A    tc/s/alpha
    U   tc/s
   
   Fetching external item into 'tc/s/externals'
   A    tc/s/externals/other
   Checked out external at revision 1.
   
   Checked out revision 3.
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd tc
 
 debugsub in clone
 
   $ hg debugsub
   path s
    source   file://*/svn-repo/src (glob)
    revision 3
   path subdir/s
    source   file://*/svn-repo/src (glob)
    revision 2
 
 verify subrepo is contained within the repo directory
 
   $ python -c "import os.path; print os.path.exists('s')"
   True
 
 update to nullrev (must delete the subrepo)
 
   $ hg up null
   0 files updated, 0 files merged, 3 files removed, 0 files unresolved
   $ ls
 
 Check hg update --clean
   $ cd $TESTTMP/sub/t
   $ cd s
   $ echo c0 > alpha
   $ echo c1 > f1
   $ echo c1 > f2
   $ svn add f1 -q
   $ svn status
   ? *    a (glob)
   X *    externals (glob)
   ? *    f2 (glob)
   M *    alpha (glob)
   A *    f1 (glob)
   
   Performing status on external item at 'externals'
   $ cd ../..
   $ hg -R t update -C
   
   Fetching external item into 't/s/externals'
   Checked out external at revision 1.
   
   Checked out revision 3.
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd t/s
   $ svn status
   ? *    a (glob)
   X *    externals (glob)
   ? *    f1 (glob)
   ? *    f2 (glob)
   
   Performing status on external item at 'externals'
 
 Sticky subrepositories, no changes
   $ cd $TESTTMP/sub/t
   $ hg id -n
   2
   $ cd s
   $ svnversion
   3
   $ cd ..
   $ hg update 1
   U    $TESTTMP/sub/t/s/alpha
   
   Fetching external item into '$TESTTMP/sub/t/s/externals'
   Checked out external at revision 1.
   
   Checked out revision 2.
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -n
   1
   $ cd s
   $ svnversion
   2
   $ cd ..
 
 Sticky subrepositorys, file changes
   $ touch s/f1
   $ cd s
   $ svn add f1
   A         f1
   $ cd ..
   $ hg id -n
   1
   $ cd s
   $ svnversion
   2M
   $ cd ..
   $ hg update tip
    subrepository sources for s differ
   use (l)ocal source (2) or (r)emote source (3)?
    l
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -n
   2+
   $ cd s
   $ svnversion
   2M
   $ cd ..
   $ hg update --clean tip
   U    $TESTTMP/sub/t/s/alpha
   
   Fetching external item into '$TESTTMP/sub/t/s/externals'
   Checked out external at revision 1.
   
   Checked out revision 3.
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Sticky subrepository, revision updates
   $ hg id -n
   2
   $ cd s
   $ svnversion
   3
   $ cd ..
   $ cd s
   $ svn update -r 1
   U    alpha
    U   .
   
   Fetching external item into 'externals'
   Updated external to revision 1.
   
   Updated to revision 1.
   $ cd ..
   $ hg update 1
    subrepository sources for s differ (in checked out version)
   use (l)ocal source (1) or (r)emote source (2)?
    l
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -n
   1+
   $ cd s
   $ svnversion
   1
   $ cd ..
 
 Sticky subrepository, file changes and revision updates
   $ touch s/f1
   $ cd s
   $ svn add f1
   A         f1
   $ svnversion
   1M
   $ cd ..
   $ hg id -n
   1+
   $ hg update tip
    subrepository sources for s differ
   use (l)ocal source (1) or (r)emote source (3)?
    l
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -n
   2
   $ cd s
   $ svnversion
   1M
   $ cd ..
 
 Sticky repository, update --clean
   $ hg update --clean tip
   U    $TESTTMP/sub/t/s/alpha
    U   $TESTTMP/sub/t/s
   
   Fetching external item into '$TESTTMP/sub/t/s/externals'
   Checked out external at revision 1.
   
   Checked out revision 3.
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -n
   2
   $ cd s
   $ svnversion
   3
   $ cd ..
 
 Test subrepo already at intended revision:
   $ cd s
   $ svn update -r 2
   U    alpha
   
   Fetching external item into 'externals'
   Updated external to revision 1.
   
   Updated to revision 2.
   $ cd ..
   $ hg update 1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -n
   1+
   $ cd s
   $ svnversion
   2
   $ cd ..
+
+Test case where subversion would fail to update the subrepo because there
+are unknown directories being replaced by tracked ones (happens with rebase).
+
+  $ cd $WCROOT/src
+  $ mkdir dir
+  $ echo epsilon.py > dir/epsilon.py
+  $ svn add dir
+  A         dir
+  A         dir/epsilon.py
+  $ svn ci -m 'Add dir/epsilon.py'
+  Adding         src/dir
+  Adding         src/dir/epsilon.py
+  Transmitting file data .
+  Committed revision 6.
+  $ cd ../..
+  $ hg init rebaserepo
+  $ cd rebaserepo
+  $ svn co -r5 --quiet "$SVNREPO"/src s
+  $ echo "s =        [svn]       $SVNREPO/src" >> .hgsub
+  $ hg add .hgsub
+  $ hg ci -m addsub
+  committing subrepository s
+  $ echo a > a
+  $ hg ci -Am adda
+  adding a
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ svn up -r6 s
+  A    s/dir
+  A    s/dir/epsilon.py
+  
+  Fetching external item into 's/externals'
+  Updated external to revision 1.
+  
+  Updated to revision 6.
+  $ hg ci -m updatesub
+  committing subrepository s
+  created new head
+  $ echo pyc > s/dir/epsilon.pyc
+  $ hg up 1
+  D    $TESTTMP/rebaserepo/s/dir
+  
+  Fetching external item into '$TESTTMP/rebaserepo/s/externals'
+  Checked out external at revision 1.
+  
+  Checked out revision 5.
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ if "$TESTDIR/hghave" -q svn15; then
+  > hg up 2 >/dev/null 2>&1 || echo update failed
+  > fi