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Diffstat (limited to 'eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/hgext/relink.py')
| -rw-r--r-- | eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/hgext/relink.py | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/hgext/relink.py b/eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/hgext/relink.py deleted file mode 100644 index 77bd3c3..0000000 --- a/eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/hgext/relink.py +++ /dev/null @@ -1,180 +0,0 @@ -# Mercurial extension to provide 'hg relink' command -# -# Copyright (C) 2007 Brendan Cully <brendan@kublai.com> -# -# This software may be used and distributed according to the terms of the -# GNU General Public License version 2 or any later version. - -"""recreates hardlinks between repository clones""" - -from mercurial import hg, util -from mercurial.i18n import _ -import os, stat - -def relink(ui, repo, origin=None, **opts): - """recreate hardlinks between two repositories - - When repositories are cloned locally, their data files will be - hardlinked so that they only use the space of a single repository. - - Unfortunately, subsequent pulls into either repository will break - hardlinks for any files touched by the new changesets, even if - both repositories end up pulling the same changes. - - Similarly, passing --rev to "hg clone" will fail to use any - hardlinks, falling back to a complete copy of the source - repository. - - This command lets you recreate those hardlinks and reclaim that - wasted space. - - This repository will be relinked to share space with ORIGIN, which - must be on the same local disk. If ORIGIN is omitted, looks for - "default-relink", then "default", in [paths]. - - Do not attempt any read operations on this repository while the - command is running. (Both repositories will be locked against - writes.) - """ - if not hasattr(util, 'samefile') or not hasattr(util, 'samedevice'): - raise util.Abort(_('hardlinks are not supported on this system')) - src = hg.repository( - hg.remoteui(repo, opts), - ui.expandpath(origin or 'default-relink', origin or 'default')) - if not src.local(): - raise util.Abort('must specify local origin repository') - ui.status(_('relinking %s to %s\n') % (src.store.path, repo.store.path)) - locallock = repo.lock() - try: - remotelock = src.lock() - try: - candidates = sorted(collect(src, ui)) - targets = prune(candidates, src.store.path, repo.store.path, ui) - do_relink(src.store.path, repo.store.path, targets, ui) - finally: - remotelock.release() - finally: - locallock.release() - -def collect(src, ui): - seplen = len(os.path.sep) - candidates = [] - live = len(src['tip'].manifest()) - # Your average repository has some files which were deleted before - # the tip revision. We account for that by assuming that there are - # 3 tracked files for every 2 live files as of the tip version of - # the repository. - # - # mozilla-central as of 2010-06-10 had a ratio of just over 7:5. - total = live * 3 // 2 - src = src.store.path - pos = 0 - ui.status(_("tip has %d files, estimated total number of files: %s\n") - % (live, total)) - for dirpath, dirnames, filenames in os.walk(src): - dirnames.sort() - relpath = dirpath[len(src) + seplen:] - for filename in sorted(filenames): - if not filename[-2:] in ('.d', '.i'): - continue - st = os.stat(os.path.join(dirpath, filename)) - if not stat.S_ISREG(st.st_mode): - continue - pos += 1 - candidates.append((os.path.join(relpath, filename), st)) - ui.progress(_('collecting'), pos, filename, _('files'), total) - - ui.progress(_('collecting'), None) - ui.status(_('collected %d candidate storage files\n') % len(candidates)) - return candidates - -def prune(candidates, src, dst, ui): - def linkfilter(src, dst, st): - try: - ts = os.stat(dst) - except OSError: - # Destination doesn't have this file? - return False - if util.samefile(src, dst): - return False - if not util.samedevice(src, dst): - # No point in continuing - raise util.Abort( - _('source and destination are on different devices')) - if st.st_size != ts.st_size: - return False - return st - - targets = [] - total = len(candidates) - pos = 0 - for fn, st in candidates: - pos += 1 - srcpath = os.path.join(src, fn) - tgt = os.path.join(dst, fn) - ts = linkfilter(srcpath, tgt, st) - if not ts: - ui.debug(_('not linkable: %s\n') % fn) - continue - targets.append((fn, ts.st_size)) - ui.progress(_('pruning'), pos, fn, _('files'), total) - - ui.progress(_('pruning'), None) - ui.status(_('pruned down to %d probably relinkable files\n') % len(targets)) - return targets - -def do_relink(src, dst, files, ui): - def relinkfile(src, dst): - bak = dst + '.bak' - os.rename(dst, bak) - try: - util.os_link(src, dst) - except OSError: - os.rename(bak, dst) - raise - os.remove(bak) - - CHUNKLEN = 65536 - relinked = 0 - savedbytes = 0 - - pos = 0 - total = len(files) - for f, sz in files: - pos += 1 - source = os.path.join(src, f) - tgt = os.path.join(dst, f) - # Binary mode, so that read() works correctly, especially on Windows - sfp = file(source, 'rb') - dfp = file(tgt, 'rb') - sin = sfp.read(CHUNKLEN) - while sin: - din = dfp.read(CHUNKLEN) - if sin != din: - break - sin = sfp.read(CHUNKLEN) - sfp.close() - dfp.close() - if sin: - ui.debug(_('not linkable: %s\n') % f) - continue - try: - relinkfile(source, tgt) - ui.progress(_('relinking'), pos, f, _('files'), total) - relinked += 1 - savedbytes += sz - except OSError, inst: - ui.warn('%s: %s\n' % (tgt, str(inst))) - - ui.progress(_('relinking'), None) - - ui.status(_('relinked %d files (%d bytes reclaimed)\n') % - (relinked, savedbytes)) - -cmdtable = { - 'relink': ( - relink, - [], - _('[ORIGIN]') - ) -} |