mirror of
https://github.com/facebook/sapling.git
synced 2024-10-11 01:07:15 +03:00
88cbab7845
This change touches every module in which repository.opener was being used, and changes it for the equivalent repository.vfs. This is meant to make it easier to split the repository.vfs into several separate vfs. It should now be possible to remove localrepo.opener.
461 lines
15 KiB
Python
461 lines
15 KiB
Python
# Mercurial bookmark support code
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#
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# Copyright 2008 David Soria Parra <dsp@php.net>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import os
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from mercurial.i18n import _
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from mercurial.node import hex, bin
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from mercurial import encoding, error, util, obsolete, lock as lockmod
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import errno
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class bmstore(dict):
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"""Storage for bookmarks.
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This object should do all bookmark reads and writes, so that it's
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fairly simple to replace the storage underlying bookmarks without
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having to clone the logic surrounding bookmarks.
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This particular bmstore implementation stores bookmarks as
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{hash}\s{name}\n (the same format as localtags) in
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.hg/bookmarks. The mapping is stored as {name: nodeid}.
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This class does NOT handle the "current" bookmark state at this
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time.
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"""
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def __init__(self, repo):
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dict.__init__(self)
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self._repo = repo
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try:
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bkfile = self.getbkfile(repo)
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for line in bkfile:
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line = line.strip()
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if not line:
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continue
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if ' ' not in line:
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repo.ui.warn(_('malformed line in .hg/bookmarks: %r\n')
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% line)
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continue
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sha, refspec = line.split(' ', 1)
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refspec = encoding.tolocal(refspec)
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try:
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self[refspec] = repo.changelog.lookup(sha)
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except LookupError:
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pass
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except IOError, inst:
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if inst.errno != errno.ENOENT:
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raise
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def getbkfile(self, repo):
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bkfile = None
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if 'HG_PENDING' in os.environ:
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try:
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bkfile = repo.vfs('bookmarks.pending')
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except IOError, inst:
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if inst.errno != errno.ENOENT:
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raise
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if bkfile is None:
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bkfile = repo.vfs('bookmarks')
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return bkfile
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def recordchange(self, tr):
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"""record that bookmarks have been changed in a transaction
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The transaction is then responsible for updating the file content."""
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tr.addfilegenerator('bookmarks', ('bookmarks',), self._write,
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location='plain')
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tr.hookargs['bookmark_moved'] = '1'
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def write(self):
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'''Write bookmarks
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Write the given bookmark => hash dictionary to the .hg/bookmarks file
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in a format equal to those of localtags.
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We also store a backup of the previous state in undo.bookmarks that
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can be copied back on rollback.
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'''
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repo = self._repo
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self._writerepo(repo)
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def _writerepo(self, repo):
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"""Factored out for extensibility"""
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if repo._bookmarkcurrent not in self:
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unsetcurrent(repo)
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wlock = repo.wlock()
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try:
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file = repo.vfs('bookmarks', 'w', atomictemp=True)
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self._write(file)
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file.close()
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# touch 00changelog.i so hgweb reloads bookmarks (no lock needed)
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try:
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repo.svfs.utime('00changelog.i', None)
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except OSError:
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pass
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finally:
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wlock.release()
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def _write(self, fp):
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for name, node in self.iteritems():
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fp.write("%s %s\n" % (hex(node), encoding.fromlocal(name)))
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def readcurrent(repo):
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'''Get the current bookmark
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If we use gittish branches we have a current bookmark that
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we are on. This function returns the name of the bookmark. It
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is stored in .hg/bookmarks.current
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'''
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mark = None
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try:
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file = repo.vfs('bookmarks.current')
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except IOError, inst:
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if inst.errno != errno.ENOENT:
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raise
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return None
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try:
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# No readline() in osutil.posixfile, reading everything is cheap
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mark = encoding.tolocal((file.readlines() or [''])[0])
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if mark == '' or mark not in repo._bookmarks:
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mark = None
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finally:
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file.close()
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return mark
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def setcurrent(repo, mark):
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'''Set the name of the bookmark that we are currently on
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Set the name of the bookmark that we are on (hg update <bookmark>).
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The name is recorded in .hg/bookmarks.current
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'''
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if mark not in repo._bookmarks:
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raise AssertionError('bookmark %s does not exist!' % mark)
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current = repo._bookmarkcurrent
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if current == mark:
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return
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wlock = repo.wlock()
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try:
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file = repo.vfs('bookmarks.current', 'w', atomictemp=True)
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file.write(encoding.fromlocal(mark))
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file.close()
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finally:
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wlock.release()
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repo._bookmarkcurrent = mark
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def unsetcurrent(repo):
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wlock = repo.wlock()
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try:
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try:
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repo.vfs.unlink('bookmarks.current')
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repo._bookmarkcurrent = None
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except OSError, inst:
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if inst.errno != errno.ENOENT:
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raise
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finally:
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wlock.release()
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def iscurrent(repo, mark=None, parents=None):
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'''Tell whether the current bookmark is also active
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I.e., the bookmark listed in .hg/bookmarks.current also points to a
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parent of the working directory.
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'''
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if not mark:
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mark = repo._bookmarkcurrent
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if not parents:
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parents = [p.node() for p in repo[None].parents()]
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marks = repo._bookmarks
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return (mark in marks and marks[mark] in parents)
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def updatecurrentbookmark(repo, oldnode, curbranch):
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try:
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return update(repo, oldnode, repo.branchtip(curbranch))
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except error.RepoLookupError:
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if curbranch == "default": # no default branch!
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return update(repo, oldnode, repo.lookup("tip"))
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else:
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raise util.Abort(_("branch %s not found") % curbranch)
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def deletedivergent(repo, deletefrom, bm):
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'''Delete divergent versions of bm on nodes in deletefrom.
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Return True if at least one bookmark was deleted, False otherwise.'''
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deleted = False
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marks = repo._bookmarks
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divergent = [b for b in marks if b.split('@', 1)[0] == bm.split('@', 1)[0]]
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for mark in divergent:
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if mark == '@' or '@' not in mark:
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# can't be divergent by definition
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continue
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if mark and marks[mark] in deletefrom:
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if mark != bm:
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del marks[mark]
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deleted = True
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return deleted
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def calculateupdate(ui, repo, checkout):
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'''Return a tuple (targetrev, movemarkfrom) indicating the rev to
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check out and where to move the active bookmark from, if needed.'''
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movemarkfrom = None
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if checkout is None:
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curmark = repo._bookmarkcurrent
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if iscurrent(repo):
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movemarkfrom = repo['.'].node()
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elif curmark:
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ui.status(_("updating to active bookmark %s\n") % curmark)
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checkout = curmark
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return (checkout, movemarkfrom)
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def update(repo, parents, node):
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deletefrom = parents
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marks = repo._bookmarks
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update = False
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cur = repo._bookmarkcurrent
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if not cur:
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return False
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if marks[cur] in parents:
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new = repo[node]
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divs = [repo[b] for b in marks
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if b.split('@', 1)[0] == cur.split('@', 1)[0]]
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anc = repo.changelog.ancestors([new.rev()])
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deletefrom = [b.node() for b in divs if b.rev() in anc or b == new]
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if validdest(repo, repo[marks[cur]], new):
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marks[cur] = new.node()
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update = True
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if deletedivergent(repo, deletefrom, cur):
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update = True
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if update:
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marks.write()
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return update
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def listbookmarks(repo):
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# We may try to list bookmarks on a repo type that does not
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# support it (e.g., statichttprepository).
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marks = getattr(repo, '_bookmarks', {})
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d = {}
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hasnode = repo.changelog.hasnode
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for k, v in marks.iteritems():
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# don't expose local divergent bookmarks
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if hasnode(v) and ('@' not in k or k.endswith('@')):
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d[k] = hex(v)
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return d
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def pushbookmark(repo, key, old, new):
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w = l = tr = None
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try:
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w = repo.wlock()
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l = repo.lock()
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tr = repo.transaction('bookmarks')
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marks = repo._bookmarks
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existing = hex(marks.get(key, ''))
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if existing != old and existing != new:
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return False
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if new == '':
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del marks[key]
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else:
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if new not in repo:
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return False
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marks[key] = repo[new].node()
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marks.recordchange(tr)
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tr.close()
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return True
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finally:
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lockmod.release(tr, l, w)
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def compare(repo, srcmarks, dstmarks,
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srchex=None, dsthex=None, targets=None):
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'''Compare bookmarks between srcmarks and dstmarks
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This returns tuple "(addsrc, adddst, advsrc, advdst, diverge,
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differ, invalid)", each are list of bookmarks below:
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:addsrc: added on src side (removed on dst side, perhaps)
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:adddst: added on dst side (removed on src side, perhaps)
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:advsrc: advanced on src side
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:advdst: advanced on dst side
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:diverge: diverge
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:differ: changed, but changeset referred on src is unknown on dst
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:invalid: unknown on both side
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:same: same on both side
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Each elements of lists in result tuple is tuple "(bookmark name,
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changeset ID on source side, changeset ID on destination
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side)". Each changeset IDs are 40 hexadecimal digit string or
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None.
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Changeset IDs of tuples in "addsrc", "adddst", "differ" or
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"invalid" list may be unknown for repo.
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This function expects that "srcmarks" and "dstmarks" return
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changeset ID in 40 hexadecimal digit string for specified
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bookmark. If not so (e.g. bmstore "repo._bookmarks" returning
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binary value), "srchex" or "dsthex" should be specified to convert
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into such form.
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If "targets" is specified, only bookmarks listed in it are
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examined.
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'''
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if not srchex:
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srchex = lambda x: x
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if not dsthex:
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dsthex = lambda x: x
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if targets:
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bset = set(targets)
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else:
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srcmarkset = set(srcmarks)
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dstmarkset = set(dstmarks)
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bset = srcmarkset | dstmarkset
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results = ([], [], [], [], [], [], [], [])
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addsrc = results[0].append
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adddst = results[1].append
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advsrc = results[2].append
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advdst = results[3].append
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diverge = results[4].append
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differ = results[5].append
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invalid = results[6].append
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same = results[7].append
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for b in sorted(bset):
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if b not in srcmarks:
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if b in dstmarks:
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adddst((b, None, dsthex(dstmarks[b])))
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else:
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invalid((b, None, None))
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elif b not in dstmarks:
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addsrc((b, srchex(srcmarks[b]), None))
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else:
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scid = srchex(srcmarks[b])
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dcid = dsthex(dstmarks[b])
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if scid == dcid:
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same((b, scid, dcid))
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elif scid in repo and dcid in repo:
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sctx = repo[scid]
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dctx = repo[dcid]
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if sctx.rev() < dctx.rev():
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if validdest(repo, sctx, dctx):
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advdst((b, scid, dcid))
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else:
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diverge((b, scid, dcid))
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else:
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if validdest(repo, dctx, sctx):
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advsrc((b, scid, dcid))
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else:
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diverge((b, scid, dcid))
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else:
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# it is too expensive to examine in detail, in this case
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differ((b, scid, dcid))
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return results
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def _diverge(ui, b, path, localmarks):
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if b == '@':
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b = ''
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# find a unique @ suffix
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for x in range(1, 100):
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n = '%s@%d' % (b, x)
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if n not in localmarks:
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break
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# try to use an @pathalias suffix
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# if an @pathalias already exists, we overwrite (update) it
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if path.startswith("file:"):
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path = util.url(path).path
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for p, u in ui.configitems("paths"):
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if u.startswith("file:"):
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u = util.url(u).path
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if path == u:
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n = '%s@%s' % (b, p)
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return n
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def updatefromremote(ui, repo, remotemarks, path, trfunc, explicit=()):
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ui.debug("checking for updated bookmarks\n")
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localmarks = repo._bookmarks
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(addsrc, adddst, advsrc, advdst, diverge, differ, invalid, same
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) = compare(repo, remotemarks, localmarks, dsthex=hex)
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status = ui.status
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warn = ui.warn
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if ui.configbool('ui', 'quietbookmarkmove', False):
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status = warn = ui.debug
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explicit = set(explicit)
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changed = []
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for b, scid, dcid in addsrc:
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if scid in repo: # add remote bookmarks for changes we already have
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changed.append((b, bin(scid), status,
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_("adding remote bookmark %s\n") % (b)))
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for b, scid, dcid in advsrc:
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changed.append((b, bin(scid), status,
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_("updating bookmark %s\n") % (b)))
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# remove normal movement from explicit set
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explicit.difference_update(d[0] for d in changed)
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for b, scid, dcid in diverge:
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if b in explicit:
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explicit.discard(b)
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changed.append((b, bin(scid), status,
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_("importing bookmark %s\n") % (b)))
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else:
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db = _diverge(ui, b, path, localmarks)
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changed.append((db, bin(scid), warn,
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_("divergent bookmark %s stored as %s\n")
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% (b, db)))
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for b, scid, dcid in adddst + advdst:
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if b in explicit:
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explicit.discard(b)
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changed.append((b, bin(scid), status,
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_("importing bookmark %s\n") % (b)))
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if changed:
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tr = trfunc()
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for b, node, writer, msg in sorted(changed):
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localmarks[b] = node
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writer(msg)
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localmarks.recordchange(tr)
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def diff(ui, dst, src):
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ui.status(_("searching for changed bookmarks\n"))
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smarks = src.listkeys('bookmarks')
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dmarks = dst.listkeys('bookmarks')
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diff = sorted(set(smarks) - set(dmarks))
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for k in diff:
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mark = ui.debugflag and smarks[k] or smarks[k][:12]
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ui.write(" %-25s %s\n" % (k, mark))
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if len(diff) <= 0:
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ui.status(_("no changed bookmarks found\n"))
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return 1
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return 0
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def validdest(repo, old, new):
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"""Is the new bookmark destination a valid update from the old one"""
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repo = repo.unfiltered()
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if old == new:
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# Old == new -> nothing to update.
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return False
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elif not old:
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# old is nullrev, anything is valid.
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# (new != nullrev has been excluded by the previous check)
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return True
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elif repo.obsstore:
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return new.node() in obsolete.foreground(repo, [old.node()])
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else:
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# still an independent clause as it is lazyer (and therefore faster)
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return old.descendant(new)
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