transaction: backup file in a dedicated "namespace"
File backup may conflict with other "journal.*" file. We add a fixed part in the
backup name file to prevent it.
# Mercurial bookmark support code
#
# Copyright 2008 David Soria Parra <dsp@php.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from mercurial.i18n import _
from mercurial.node import hex, bin
from mercurial import encoding, error, util, obsolete
import errno
class bmstore(dict):
"""Storage for bookmarks.
This object should do all bookmark reads and writes, so that it's
fairly simple to replace the storage underlying bookmarks without
having to clone the logic surrounding bookmarks.
This particular bmstore implementation stores bookmarks as
{hash}\s{name}\n (the same format as localtags) in
.hg/bookmarks. The mapping is stored as {name: nodeid}.
This class does NOT handle the "current" bookmark state at this
time.
"""
def __init__(self, repo):
dict.__init__(self)
self._repo = repo
try:
for line in repo.vfs('bookmarks'):
line = line.strip()
if not line:
continue
if ' ' not in line:
repo.ui.warn(_('malformed line in .hg/bookmarks: %r\n')
% line)
continue
sha, refspec = line.split(' ', 1)
refspec = encoding.tolocal(refspec)
try:
self[refspec] = repo.changelog.lookup(sha)
except LookupError:
pass
except IOError, inst:
if inst.errno != errno.ENOENT:
raise
def write(self):
'''Write bookmarks
Write the given bookmark => hash dictionary to the .hg/bookmarks file
in a format equal to those of localtags.
We also store a backup of the previous state in undo.bookmarks that
can be copied back on rollback.
'''
repo = self._repo
if repo._bookmarkcurrent not in self:
unsetcurrent(repo)
wlock = repo.wlock()
try:
file = repo.vfs('bookmarks', 'w', atomictemp=True)
for name, node in self.iteritems():
file.write("%s %s\n" % (hex(node), encoding.fromlocal(name)))
file.close()
# touch 00changelog.i so hgweb reloads bookmarks (no lock needed)
try:
repo.svfs.utime('00changelog.i', None)
except OSError:
pass
finally:
wlock.release()
def readcurrent(repo):
'''Get the current bookmark
If we use gittish branches we have a current bookmark that
we are on. This function returns the name of the bookmark. It
is stored in .hg/bookmarks.current
'''
mark = None
try:
file = repo.opener('bookmarks.current')
except IOError, inst:
if inst.errno != errno.ENOENT:
raise
return None
try:
# No readline() in osutil.posixfile, reading everything is cheap
mark = encoding.tolocal((file.readlines() or [''])[0])
if mark == '' or mark not in repo._bookmarks:
mark = None
finally:
file.close()
return mark
def setcurrent(repo, mark):
'''Set the name of the bookmark that we are currently on
Set the name of the bookmark that we are on (hg update <bookmark>).
The name is recorded in .hg/bookmarks.current
'''
if mark not in repo._bookmarks:
raise AssertionError('bookmark %s does not exist!' % mark)
current = repo._bookmarkcurrent
if current == mark:
return
wlock = repo.wlock()
try:
file = repo.opener('bookmarks.current', 'w', atomictemp=True)
file.write(encoding.fromlocal(mark))
file.close()
finally:
wlock.release()
repo._bookmarkcurrent = mark
def unsetcurrent(repo):
wlock = repo.wlock()
try:
try:
repo.vfs.unlink('bookmarks.current')
repo._bookmarkcurrent = None
except OSError, inst:
if inst.errno != errno.ENOENT:
raise
finally:
wlock.release()
def iscurrent(repo, mark=None, parents=None):
'''Tell whether the current bookmark is also active
I.e., the bookmark listed in .hg/bookmarks.current also points to a
parent of the working directory.
'''
if not mark:
mark = repo._bookmarkcurrent
if not parents:
parents = [p.node() for p in repo[None].parents()]
marks = repo._bookmarks
return (mark in marks and marks[mark] in parents)
def updatecurrentbookmark(repo, oldnode, curbranch):
try:
return update(repo, oldnode, repo.branchtip(curbranch))
except error.RepoLookupError:
if curbranch == "default": # no default branch!
return update(repo, oldnode, repo.lookup("tip"))
else:
raise util.Abort(_("branch %s not found") % curbranch)
def deletedivergent(repo, deletefrom, bm):
'''Delete divergent versions of bm on nodes in deletefrom.
Return True if at least one bookmark was deleted, False otherwise.'''
deleted = False
marks = repo._bookmarks
divergent = [b for b in marks if b.split('@', 1)[0] == bm.split('@', 1)[0]]
for mark in divergent:
if mark == '@' or '@' not in mark:
# can't be divergent by definition
continue
if mark and marks[mark] in deletefrom:
if mark != bm:
del marks[mark]
deleted = True
return deleted
def calculateupdate(ui, repo, checkout):
'''Return a tuple (targetrev, movemarkfrom) indicating the rev to
check out and where to move the active bookmark from, if needed.'''
movemarkfrom = None
if checkout is None:
curmark = repo._bookmarkcurrent
if iscurrent(repo):
movemarkfrom = repo['.'].node()
elif curmark:
ui.status(_("updating to active bookmark %s\n") % curmark)
checkout = curmark
return (checkout, movemarkfrom)
def update(repo, parents, node):
deletefrom = parents
marks = repo._bookmarks
update = False
cur = repo._bookmarkcurrent
if not cur:
return False
if marks[cur] in parents:
new = repo[node]
divs = [repo[b] for b in marks
if b.split('@', 1)[0] == cur.split('@', 1)[0]]
anc = repo.changelog.ancestors([new.rev()])
deletefrom = [b.node() for b in divs if b.rev() in anc or b == new]
if validdest(repo, repo[marks[cur]], new):
marks[cur] = new.node()
update = True
if deletedivergent(repo, deletefrom, cur):
update = True
if update:
marks.write()
return update
def listbookmarks(repo):
# We may try to list bookmarks on a repo type that does not
# support it (e.g., statichttprepository).
marks = getattr(repo, '_bookmarks', {})
d = {}
hasnode = repo.changelog.hasnode
for k, v in marks.iteritems():
# don't expose local divergent bookmarks
if hasnode(v) and ('@' not in k or k.endswith('@')):
d[k] = hex(v)
return d
def pushbookmark(repo, key, old, new):
w = repo.wlock()
try:
marks = repo._bookmarks
if hex(marks.get(key, '')) != old:
return False
if new == '':
del marks[key]
else:
if new not in repo:
return False
marks[key] = repo[new].node()
marks.write()
return True
finally:
w.release()
def compare(repo, srcmarks, dstmarks,
srchex=None, dsthex=None, targets=None):
'''Compare bookmarks between srcmarks and dstmarks
This returns tuple "(addsrc, adddst, advsrc, advdst, diverge,
differ, invalid)", each are list of bookmarks below:
:addsrc: added on src side (removed on dst side, perhaps)
:adddst: added on dst side (removed on src side, perhaps)
:advsrc: advanced on src side
:advdst: advanced on dst side
:diverge: diverge
:differ: changed, but changeset referred on src is unknown on dst
:invalid: unknown on both side
Each elements of lists in result tuple is tuple "(bookmark name,
changeset ID on source side, changeset ID on destination
side)". Each changeset IDs are 40 hexadecimal digit string or
None.
Changeset IDs of tuples in "addsrc", "adddst", "differ" or
"invalid" list may be unknown for repo.
This function expects that "srcmarks" and "dstmarks" return
changeset ID in 40 hexadecimal digit string for specified
bookmark. If not so (e.g. bmstore "repo._bookmarks" returning
binary value), "srchex" or "dsthex" should be specified to convert
into such form.
If "targets" is specified, only bookmarks listed in it are
examined.
'''
if not srchex:
srchex = lambda x: x
if not dsthex:
dsthex = lambda x: x
if targets:
bset = set(targets)
else:
srcmarkset = set(srcmarks)
dstmarkset = set(dstmarks)
bset = srcmarkset ^ dstmarkset
for b in srcmarkset & dstmarkset:
if srchex(srcmarks[b]) != dsthex(dstmarks[b]):
bset.add(b)
results = ([], [], [], [], [], [], [])
addsrc = results[0].append
adddst = results[1].append
advsrc = results[2].append
advdst = results[3].append
diverge = results[4].append
differ = results[5].append
invalid = results[6].append
for b in sorted(bset):
if b not in srcmarks:
if b in dstmarks:
adddst((b, None, dsthex(dstmarks[b])))
else:
invalid((b, None, None))
elif b not in dstmarks:
addsrc((b, srchex(srcmarks[b]), None))
else:
scid = srchex(srcmarks[b])
dcid = dsthex(dstmarks[b])
if scid in repo and dcid in repo:
sctx = repo[scid]
dctx = repo[dcid]
if sctx.rev() < dctx.rev():
if validdest(repo, sctx, dctx):
advdst((b, scid, dcid))
else:
diverge((b, scid, dcid))
else:
if validdest(repo, dctx, sctx):
advsrc((b, scid, dcid))
else:
diverge((b, scid, dcid))
else:
# it is too expensive to examine in detail, in this case
differ((b, scid, dcid))
return results
def _diverge(ui, b, path, localmarks):
if b == '@':
b = ''
# find a unique @ suffix
for x in range(1, 100):
n = '%s@%d' % (b, x)
if n not in localmarks:
break
# try to use an @pathalias suffix
# if an @pathalias already exists, we overwrite (update) it
for p, u in ui.configitems("paths"):
if path == u:
n = '%s@%s' % (b, p)
return n
def updatefromremote(ui, repo, remotemarks, path):
ui.debug("checking for updated bookmarks\n")
localmarks = repo._bookmarks
(addsrc, adddst, advsrc, advdst, diverge, differ, invalid
) = compare(repo, remotemarks, localmarks, dsthex=hex)
changed = []
for b, scid, dcid in addsrc:
if scid in repo: # add remote bookmarks for changes we already have
changed.append((b, bin(scid), ui.status,
_("adding remote bookmark %s\n") % (b)))
for b, scid, dcid in advsrc:
changed.append((b, bin(scid), ui.status,
_("updating bookmark %s\n") % (b)))
for b, scid, dcid in diverge:
db = _diverge(ui, b, path, localmarks)
changed.append((db, bin(scid), ui.warn,
_("divergent bookmark %s stored as %s\n") % (b, db)))
if changed:
for b, node, writer, msg in sorted(changed):
localmarks[b] = node
writer(msg)
localmarks.write()
def pushtoremote(ui, repo, remote, targets):
(addsrc, adddst, advsrc, advdst, diverge, differ, invalid
) = compare(repo, repo._bookmarks, remote.listkeys('bookmarks'),
srchex=hex, targets=targets)
if invalid:
b, scid, dcid = invalid[0]
ui.warn(_('bookmark %s does not exist on the local '
'or remote repository!\n') % b)
return 2
def push(b, old, new):
r = remote.pushkey('bookmarks', b, old, new)
if not r:
ui.warn(_('updating bookmark %s failed!\n') % b)
return 1
return 0
failed = 0
for b, scid, dcid in sorted(addsrc + advsrc + advdst + diverge + differ):
ui.status(_("exporting bookmark %s\n") % b)
if dcid is None:
dcid = ''
failed += push(b, dcid, scid)
for b, scid, dcid in adddst:
# treat as "deleted locally"
ui.status(_("deleting remote bookmark %s\n") % b)
failed += push(b, dcid, '')
if failed:
return 1
def diff(ui, dst, src):
ui.status(_("searching for changed bookmarks\n"))
smarks = src.listkeys('bookmarks')
dmarks = dst.listkeys('bookmarks')
diff = sorted(set(smarks) - set(dmarks))
for k in diff:
mark = ui.debugflag and smarks[k] or smarks[k][:12]
ui.write(" %-25s %s\n" % (k, mark))
if len(diff) <= 0:
ui.status(_("no changed bookmarks found\n"))
return 1
return 0
def validdest(repo, old, new):
"""Is the new bookmark destination a valid update from the old one"""
repo = repo.unfiltered()
if old == new:
# Old == new -> nothing to update.
return False
elif not old:
# old is nullrev, anything is valid.
# (new != nullrev has been excluded by the previous check)
return True
elif repo.obsstore:
return new.node() in obsolete.foreground(repo, [old.node()])
else:
# still an independent clause as it is lazyer (and therefore faster)
return old.descendant(new)