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# Copyright 2009-2010 Gregory P. Ward
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# Copyright 2009-2010 Intelerad Medical Systems Incorporated
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# Copyright 2010-2011 Fog Creek Software
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# Copyright 2010-2011 Unity Technologies
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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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'''High-level command function for lfconvert, plus the cmdtable.'''
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import os
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import shutil
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from mercurial import util, match as match_, hg, node, context, error
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from mercurial.i18n import _
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import lfutil
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import basestore
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# -- Commands ----------------------------------------------------------
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def lfconvert(ui, src, dest, *pats, **opts):
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'''convert a normal repository to a largefiles repository
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Convert repository SOURCE to a new repository DEST, identical to
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SOURCE except that certain files will be converted as largefiles:
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specifically, any file that matches any PATTERN *or* whose size is
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above the minimum size threshold is converted as a largefile. The
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size used to determine whether or not to track a file as a
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largefile is the size of the first version of the file. The
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minimum size can be specified either with --size or in
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configuration as ``largefiles.size``.
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After running this command you will need to make sure that
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largefiles is enabled anywhere you intend to push the new
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repository.
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Use --to-normal to convert largefiles back to normal files; after
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this, the DEST repository can be used without largefiles at all.'''
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if opts['to_normal']:
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tolfile = False
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else:
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tolfile = True
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size = lfutil.getminsize(ui, True, opts.get('size'), default=None)
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if not hg.islocal(src):
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raise util.Abort(_('%s is not a local Mercurial repo') % src)
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if not hg.islocal(dest):
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raise util.Abort(_('%s is not a local Mercurial repo') % dest)
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rsrc = hg.repository(ui, src)
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ui.status(_('initializing destination %s\n') % dest)
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rdst = hg.repository(ui, dest, create=True)
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success = False
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try:
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# Lock destination to prevent modification while it is converted to.
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# Don't need to lock src because we are just reading from its history
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# which can't change.
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dst_lock = rdst.lock()
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# Get a list of all changesets in the source. The easy way to do this
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# is to simply walk the changelog, using changelog.nodesbewteen().
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# Take a look at mercurial/revlog.py:639 for more details.
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# Use a generator instead of a list to decrease memory usage
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ctxs = (rsrc[ctx] for ctx in rsrc.changelog.nodesbetween(None,
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rsrc.heads())[0])
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revmap = {node.nullid: node.nullid}
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if tolfile:
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lfiles = set()
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normalfiles = set()
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if not pats:
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pats = ui.configlist(lfutil.longname, 'patterns', default=[])
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if pats:
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matcher = match_.match(rsrc.root, '', list(pats))
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else:
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matcher = None
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lfiletohash = {}
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for ctx in ctxs:
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ui.progress(_('converting revisions'), ctx.rev(),
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unit=_('revision'), total=rsrc['tip'].rev())
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_lfconvert_addchangeset(rsrc, rdst, ctx, revmap,
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lfiles, normalfiles, matcher, size, lfiletohash)
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ui.progress(_('converting revisions'), None)
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if os.path.exists(rdst.wjoin(lfutil.shortname)):
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shutil.rmtree(rdst.wjoin(lfutil.shortname))
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for f in lfiletohash.keys():
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if os.path.isfile(rdst.wjoin(f)):
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os.unlink(rdst.wjoin(f))
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try:
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os.removedirs(os.path.dirname(rdst.wjoin(f)))
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except OSError:
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pass
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# If there were any files converted to largefiles, add largefiles
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# to the destination repository's requirements.
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if lfiles:
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rdst.requirements.add('largefiles')
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rdst._writerequirements()
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else:
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for ctx in ctxs:
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ui.progress(_('converting revisions'), ctx.rev(),
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unit=_('revision'), total=rsrc['tip'].rev())
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_addchangeset(ui, rsrc, rdst, ctx, revmap)
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ui.progress(_('converting revisions'), None)
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success = True
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finally:
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if not success:
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# we failed, remove the new directory
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shutil.rmtree(rdst.root)
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dst_lock.release()
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def _addchangeset(ui, rsrc, rdst, ctx, revmap):
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# Convert src parents to dst parents
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parents = []
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for p in ctx.parents():
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parents.append(revmap[p.node()])
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while len(parents) < 2:
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parents.append(node.nullid)
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# Generate list of changed files
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files = set(ctx.files())
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if node.nullid not in parents:
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mc = ctx.manifest()
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mp1 = ctx.parents()[0].manifest()
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mp2 = ctx.parents()[1].manifest()
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files |= (set(mp1) | set(mp2)) - set(mc)
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for f in mc:
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if mc[f] != mp1.get(f, None) or mc[f] != mp2.get(f, None):
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files.add(f)
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def getfilectx(repo, memctx, f):
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if lfutil.standin(f) in files:
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# if the file isn't in the manifest then it was removed
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# or renamed, raise IOError to indicate this
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try:
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fctx = ctx.filectx(lfutil.standin(f))
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except error.LookupError:
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raise IOError()
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renamed = fctx.renamed()
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if renamed:
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renamed = lfutil.splitstandin(renamed[0])
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hash = fctx.data().strip()
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path = lfutil.findfile(rsrc, hash)
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### TODO: What if the file is not cached?
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data = ''
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fd = None
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try:
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fd = open(path, 'rb')
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data = fd.read()
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finally:
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if fd:
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fd.close()
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return context.memfilectx(f, data, 'l' in fctx.flags(),
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'x' in fctx.flags(), renamed)
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else:
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try:
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fctx = ctx.filectx(f)
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except error.LookupError:
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raise IOError()
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renamed = fctx.renamed()
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if renamed:
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renamed = renamed[0]
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data = fctx.data()
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if f == '.hgtags':
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newdata = []
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for line in data.splitlines():
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id, name = line.split(' ', 1)
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newdata.append('%s %s\n' % (node.hex(revmap[node.bin(id)]),
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name))
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data = ''.join(newdata)
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return context.memfilectx(f, data, 'l' in fctx.flags(),
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'x' in fctx.flags(), renamed)
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dstfiles = []
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for file in files:
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if lfutil.isstandin(file):
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dstfiles.append(lfutil.splitstandin(file))
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else:
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dstfiles.append(file)
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# Commit
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mctx = context.memctx(rdst, parents, ctx.description(), dstfiles,
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getfilectx, ctx.user(), ctx.date(), ctx.extra())
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ret = rdst.commitctx(mctx)
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rdst.dirstate.setparents(ret)
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revmap[ctx.node()] = rdst.changelog.tip()
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def _lfconvert_addchangeset(rsrc, rdst, ctx, revmap, lfiles, normalfiles,
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matcher, size, lfiletohash):
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# Convert src parents to dst parents
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parents = []
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for p in ctx.parents():
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parents.append(revmap[p.node()])
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while len(parents) < 2:
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parents.append(node.nullid)
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# Generate list of changed files
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files = set(ctx.files())
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if node.nullid not in parents:
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mc = ctx.manifest()
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mp1 = ctx.parents()[0].manifest()
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mp2 = ctx.parents()[1].manifest()
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files |= (set(mp1) | set(mp2)) - set(mc)
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for f in mc:
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if mc[f] != mp1.get(f, None) or mc[f] != mp2.get(f, None):
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files.add(f)
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dstfiles = []
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for f in files:
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if f not in lfiles and f not in normalfiles:
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islfile = _islfile(f, ctx, matcher, size)
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# If this file was renamed or copied then copy
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# the lfileness of its predecessor
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if f in ctx.manifest():
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fctx = ctx.filectx(f)
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renamed = fctx.renamed()
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renamedlfile = renamed and renamed[0] in lfiles
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islfile |= renamedlfile
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if 'l' in fctx.flags():
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if renamedlfile:
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raise util.Abort(
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_('renamed/copied largefile %s becomes symlink')
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% f)
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islfile = False
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if islfile:
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lfiles.add(f)
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else:
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normalfiles.add(f)
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if f in lfiles:
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dstfiles.append(lfutil.standin(f))
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# largefile in manifest if it has not been removed/renamed
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if f in ctx.manifest():
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if 'l' in ctx.filectx(f).flags():
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if renamed and renamed[0] in lfiles:
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raise util.Abort(_('largefile %s becomes symlink') % f)
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# largefile was modified, update standins
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fullpath = rdst.wjoin(f)
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util.makedirs(os.path.dirname(fullpath))
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m = util.sha1('')
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m.update(ctx[f].data())
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hash = m.hexdigest()
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if f not in lfiletohash or lfiletohash[f] != hash:
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try:
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fd = open(fullpath, 'wb')
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fd.write(ctx[f].data())
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finally:
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if fd:
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fd.close()
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executable = 'x' in ctx[f].flags()
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os.chmod(fullpath, lfutil.getmode(executable))
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lfutil.writestandin(rdst, lfutil.standin(f), hash,
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executable)
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lfiletohash[f] = hash
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else:
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# normal file
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dstfiles.append(f)
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def getfilectx(repo, memctx, f):
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if lfutil.isstandin(f):
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# if the file isn't in the manifest then it was removed
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# or renamed, raise IOError to indicate this
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srcfname = lfutil.splitstandin(f)
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try:
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fctx = ctx.filectx(srcfname)
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except error.LookupError:
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raise IOError()
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renamed = fctx.renamed()
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if renamed:
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# standin is always a largefile because largefile-ness
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# doesn't change after rename or copy
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renamed = lfutil.standin(renamed[0])
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return context.memfilectx(f, lfiletohash[srcfname] + '\n', 'l' in
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fctx.flags(), 'x' in fctx.flags(), renamed)
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else:
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try:
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fctx = ctx.filectx(f)
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except error.LookupError:
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raise IOError()
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renamed = fctx.renamed()
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if renamed:
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renamed = renamed[0]
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data = fctx.data()
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if f == '.hgtags':
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newdata = []
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for line in data.splitlines():
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id, name = line.split(' ', 1)
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newdata.append('%s %s\n' % (node.hex(revmap[node.bin(id)]),
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name))
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data = ''.join(newdata)
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return context.memfilectx(f, data, 'l' in fctx.flags(),
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'x' in fctx.flags(), renamed)
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# Commit
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mctx = context.memctx(rdst, parents, ctx.description(), dstfiles,
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getfilectx, ctx.user(), ctx.date(), ctx.extra())
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ret = rdst.commitctx(mctx)
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rdst.dirstate.setparents(ret)
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revmap[ctx.node()] = rdst.changelog.tip()
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def _islfile(file, ctx, matcher, size):
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'''Return true if file should be considered a largefile, i.e.
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matcher matches it or it is larger than size.'''
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# never store special .hg* files as largefiles
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if file == '.hgtags' or file == '.hgignore' or file == '.hgsigs':
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return False
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if matcher and matcher(file):
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return True
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try:
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return ctx.filectx(file).size() >= size * 1024 * 1024
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except error.LookupError:
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return False
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def uploadlfiles(ui, rsrc, rdst, files):
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'''upload largefiles to the central store'''
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if not files:
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return
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store = basestore._openstore(rsrc, rdst, put=True)
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at = 0
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files = filter(lambda h: not store.exists(h), files)
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for hash in files:
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ui.progress(_('uploading largefiles'), at, unit='largefile',
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total=len(files))
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source = lfutil.findfile(rsrc, hash)
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if not source:
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raise util.Abort(_('largefile %s missing from store'
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' (needs to be uploaded)') % hash)
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# XXX check for errors here
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store.put(source, hash)
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at += 1
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ui.progress(_('uploading largefiles'), None)
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def verifylfiles(ui, repo, all=False, contents=False):
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'''Verify that every big file revision in the current changeset
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exists in the central store. With --contents, also verify that
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the contents of each big file revision are correct (SHA-1 hash
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matches the revision ID). With --all, check every changeset in
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this repository.'''
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if all:
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# Pass a list to the function rather than an iterator because we know a
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# list will work.
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revs = range(len(repo))
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else:
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revs = ['.']
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store = basestore._openstore(repo)
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return store.verify(revs, contents=contents)
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def cachelfiles(ui, repo, node):
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'''cachelfiles ensures that all largefiles needed by the specified revision
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are present in the repository's largefile cache.
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returns a tuple (cached, missing). cached is the list of files downloaded
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by this operation; missing is the list of files that were needed but could
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not be found.'''
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lfiles = lfutil.listlfiles(repo, node)
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toget = []
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for lfile in lfiles:
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expectedhash = repo[node][lfutil.standin(lfile)].data().strip()
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# if it exists and its hash matches, it might have been locally
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# modified before updating and the user chose 'local'. in this case,
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# it will not be in any store, so don't look for it.
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if ((not os.path.exists(repo.wjoin(lfile)) or
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expectedhash != lfutil.hashfile(repo.wjoin(lfile))) and
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not lfutil.findfile(repo, expectedhash)):
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toget.append((lfile, expectedhash))
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if toget:
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store = basestore._openstore(repo)
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ret = store.get(toget)
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return ret
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return ([], [])
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def updatelfiles(ui, repo, filelist=None, printmessage=True):
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wlock = repo.wlock()
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try:
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lfdirstate = lfutil.openlfdirstate(ui, repo)
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lfiles = set(lfutil.listlfiles(repo)) | set(lfdirstate)
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if filelist is not None:
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lfiles = [f for f in lfiles if f in filelist]
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printed = False
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if printmessage and lfiles:
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ui.status(_('getting changed largefiles\n'))
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printed = True
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cachelfiles(ui, repo, '.')
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updated, removed = 0, 0
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for i in map(lambda f: _updatelfile(repo, lfdirstate, f), lfiles):
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# increment the appropriate counter according to _updatelfile's
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# return value
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updated += i > 0 and i or 0
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removed -= i < 0 and i or 0
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if printmessage and (removed or updated) and not printed:
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ui.status(_('getting changed largefiles\n'))
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printed = True
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lfdirstate.write()
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if printed and printmessage:
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ui.status(_('%d largefiles updated, %d removed\n') % (updated,
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removed))
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finally:
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wlock.release()
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def _updatelfile(repo, lfdirstate, lfile):
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'''updates a single largefile and copies the state of its standin from
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the repository's dirstate to its state in the lfdirstate.
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|
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returns 1 if the file was modified, -1 if the file was removed, 0 if the
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|
file was unchanged, and None if the needed largefile was missing from the
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cache.'''
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ret = 0
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abslfile = repo.wjoin(lfile)
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absstandin = repo.wjoin(lfutil.standin(lfile))
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if os.path.exists(absstandin):
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if os.path.exists(absstandin+'.orig'):
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shutil.copyfile(abslfile, abslfile+'.orig')
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expecthash = lfutil.readstandin(repo, lfile)
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if (expecthash != '' and
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|
(not os.path.exists(abslfile) or
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|
expecthash != lfutil.hashfile(abslfile))):
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if not lfutil.copyfromcache(repo, expecthash, lfile):
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# use normallookup() to allocate entry in largefiles dirstate,
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# because lack of it misleads lfiles_repo.status() into
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|
# recognition that such cache missing files are REMOVED.
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lfdirstate.normallookup(lfile)
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return None # don't try to set the mode
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|
ret = 1
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|
|
mode = os.stat(absstandin).st_mode
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|
if mode != os.stat(abslfile).st_mode:
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|
os.chmod(abslfile, mode)
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ret = 1
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else:
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|
# Remove lfiles for which the standin is deleted, unless the
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|
# lfile is added to the repository again. This happens when a
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|
|
# largefile is converted back to a normal file: the standin
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|
|
# disappears, but a new (normal) file appears as the lfile.
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|
|
if os.path.exists(abslfile) and lfile not in repo[None]:
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os.unlink(abslfile)
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|
ret = -1
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|
|
state = repo.dirstate[lfutil.standin(lfile)]
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|
|
if state == 'n':
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|
lfdirstate.normal(lfile)
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|
|
elif state == 'r':
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|
lfdirstate.remove(lfile)
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|
elif state == 'a':
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|
lfdirstate.add(lfile)
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|
elif state == '?':
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|
lfdirstate.drop(lfile)
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|
|
return ret
|
|
|
|
|
|
# -- hg commands declarations ------------------------------------------------
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|
|
|
|
|
cmdtable = {
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|
|
'lfconvert': (lfconvert,
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|
|
[('s', 'size', '',
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|
|
_('minimum size (MB) for files to be converted '
|
|
|
'as largefiles'),
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|
|
'SIZE'),
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|
|
('', 'to-normal', False,
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|
|
_('convert from a largefiles repo to a normal repo')),
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|
|
],
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|
|
_('hg lfconvert SOURCE DEST [FILE ...]')),
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|
|
}
|
|
|
|
