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documentation: fix docstring for lfconvert

Changeset 182f1db4e5ba …

Parent 8579c0446659 …

by Andrew Pritchard <andrewp@fogcreek.com> Aug 10 11 at 10:08 PM

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Change 1 of 1 Show Changes Only Show Entire File Loading... lfcommands.py Stacked
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Ward` `# Copyright 2010-2011 Fog Creek Software` `# Copyright 2010-2011 Unity Technologies` `#` `# This software may be used and distributed according to the terms of the` `# GNU General Public License version 2 or any later version.` `'''High-level command functions: lfadd() et. al, plus the cmdtable.'''` `import os` `import shutil` `from mercurial import util, match as match_, hg, node, context, error` `from mercurial.i18n import _` `import lfutil` `import basestore` `# -- Commands ----------------------------------------------------------` `def lfconvert(ui, src, dest, pats, opts):`-`'''Convert a repository to a repository using largefiles`+`'''Convert a normal repository to a largefiles repository` -`Convert source repository creating an identical`-`repository, except that all files that match the`-`patterns given, or are over a given size will`-`be added as largefiles. The size of a file is the size of the`-`first version of the file. After running this command you`-`will need to set the store then run lfput on the new`-`repository to upload the largefiles to the central store.`-`'''`+`Convert source repository creating an identical repository, except that all`+`files that match the patterns given, or are over the given size will be`+`added as largefiles. The size used to determine whether or not to track a`+`file as a largefile is the size of the first version of the file. After`+`running this command you will need to make sure that largefiles is enabled`+`anywhere you intend to push the new repository.'''` `if opts['tonormal']:` `tolfile = False` `else:` `tolfile = True` `size = opts['size']` `if not size:` `size = ui.config(lfutil.longname, 'size', default=None)` `try:` `size = int(size)` `except ValueError:` `raise util.Abort(_('largefiles.size must be integer, was %s\n') % \` `size)` `except TypeError:` `raise util.Abort(_('size must be specified'))` `try:` `rsrc = hg.repository(ui, src)` `if not rsrc.local():` `raise util.Abort(_('%s is not a local Mercurial repo') % src)` `except error.RepoError, err:` `ui.traceback()` `raise util.Abort(err.args[0])` `if os.path.exists(dest):` `if not os.path.isdir(dest):` `raise util.Abort(_('destination %s already exists') % dest)` `elif os.listdir(dest):` `raise util.Abort(_('destination %s is not empty') % dest)` `try:` `ui.status(_('initializing destination %s\n') % dest)` `rdst = hg.repository(ui, dest, create=True)` `if not rdst.local():` `raise util.Abort(_('%s is not a local Mercurial repo') % dest)` `except error.RepoError:` `ui.traceback()` `raise util.Abort(_('%s is not a repo') % dest)` `try:` `# Lock destination to prevent modification while it is converted to.` `# Don't need to lock src because we are just reading from its history` `# which can't change.` `dst_lock = rdst.lock()` `# Get a list of all changesets in the source. The easy way to do this` `# is to simply walk the changelog, using changelog.nodesbewteen().` `# Take a look at mercurial/revlog.py:639 for more details.` `# Use a generator instead of a list to decrease memory usage` `ctxs = (rsrc[ctx] for ctx in rsrc.changelog.nodesbetween(None,` `rsrc.heads())[0])` `revmap = {node.nullid: node.nullid}` `if tolfile:` `lfiles = set()` `normalfiles = set()` `if not pats:` `pats = ui.config(lfutil.longname, 'patterns', default=())` `if pats:` `pats = pats.split(' ')` `if pats:` `matcher = match_.match(rsrc.root, '', list(pats))` `else:` `matcher = None` `lfiletohash = {}` `for ctx in ctxs:` `ui.progress(_('converting revisions'), ctx.rev(),` `unit=_('revision'), total=rsrc['tip'].rev())` `_lfconvert_addchangeset(rsrc, rdst, ctx, revmap,` `lfiles, normalfiles, matcher, size, lfiletohash)` `ui.progress(_('converting revisions'), None)` `if os.path.exists(rdst.wjoin(lfutil.shortname)):` `shutil.rmtree(rdst.wjoin(lfutil.shortname))` `for f in lfiletohash.keys():` `if os.path.isfile(rdst.wjoin(f)):` `os.unlink(rdst.wjoin(f))` `try:` `os.removedirs(os.path.dirname(rdst.wjoin(f)))` `except:` `pass` `else:` `for ctx in ctxs:` `ui.progress(_('converting revisions'), ctx.rev(),` `unit=_('revision'), total=rsrc['tip'].rev())` `_addchangeset(ui, rsrc, rdst, ctx, revmap)` `ui.progress(_('converting revisions'), None)` `except:` `# we failed, remove the new directory` `shutil.rmtree(rdst.root)` `raise` `finally:` `dst_lock.release()` `def _addchangeset(ui, rsrc, rdst, ctx, revmap):` `# Convert src parents to dst parents` `parents = []` `for p in ctx.parents():` `parents.append(revmap[p.node()])` `while len(parents) < 2:` `parents.append(node.nullid)` `# Generate list of changed files` `files = set(ctx.files())` `if node.nullid not in parents:` `mc = ctx.manifest()` `mp1 = ctx.parents()[0].manifest()` `mp2 = ctx.parents()[1].manifest()` `files \|= (set(mp1) \| set(mp2)) - set(mc)` `for f in mc:` `if mc[f] != mp1.get(f, None) or mc[f] != mp2.get(f, None):` `files.add(f)` `def getfilectx(repo, memctx, f):` `if lfutil.standin(f) in files:` `# if the file isn't in the manifest then it was removed` `# or renamed, raise IOError to indicate this` `try:` `fctx = ctx.filectx(lfutil.standin(f))` `except error.LookupError:` `raise IOError()` `renamed = fctx.renamed()` `if renamed:` `renamed = lfutil.splitstandin(renamed[0])` `hash = fctx.data().strip()` `path = lfutil.findfile(rsrc, hash)` `### TODO: What if the file is not cached?` `data = ''` `fd = None` `try:` `fd = open(path, 'rb')` `data = fd.read()` `finally:` `if fd: fd.close()` `return context.memfilectx(f, data, 'l' in fctx.flags(),` `'x' in fctx.flags(), renamed)` `else:` `try:` `fctx = ctx.filectx(f)` `except error.LookupError:` `raise IOError()` `renamed = fctx.renamed()` `if renamed:` `renamed = renamed[0]` `data = fctx.data()` `if f == '.hgtags':` `newdata = []` `for line in data.splitlines():` `id, name = line.split(' ', 1)` `newdata.append('%s %s\n' % (node.hex(revmap[node.bin(id)]),` `name))` `data = ''.join(newdata)` `return context.memfilectx(f, data, 'l' in fctx.flags(),` `'x' in fctx.flags(), renamed)` `dstfiles = []` `for file in files:` `if lfutil.isstandin(file):` `dstfiles.append(lfutil.splitstandin(file))` `else:` `dstfiles.append(file)` `# Commit` `mctx = context.memctx(rdst, parents, ctx.description(), dstfiles,` `getfilectx, ctx.user(), ctx.date(), ctx.extra())` `ret = rdst.commitctx(mctx)` `rdst.dirstate.setparents(ret)` `revmap[ctx.node()] = rdst.changelog.tip()` `def _lfconvert_addchangeset(rsrc, rdst, ctx, revmap, lfiles, normalfiles,` `matcher, size, lfiletohash):` `# Convert src parents to dst parents` `parents = []` `for p in ctx.parents():` `parents.append(revmap[p.node()])` `while len(parents) < 2:` `parents.append(node.nullid)` `# Generate list of changed files` `files = set(ctx.files())` `if node.nullid not in parents:` `mc = ctx.manifest()` `mp1 = ctx.parents()[0].manifest()` `mp2 = ctx.parents()[1].manifest()` `files \|= (set(mp1) \| set(mp2)) - set(mc)` `for f in mc:` `if mc[f] != mp1.get(f, None) or mc[f] != mp2.get(f, None):` `files.add(f)` `dstfiles = []` `for f in files:` `if f not in lfiles and f not in normalfiles:` `islfile = _islfile(f, ctx, matcher, size)` `# If this file was renamed or copied then copy` `# the lfileness of its predecessor` `if f in ctx.manifest():` `fctx = ctx.filectx(f)` `renamed = fctx.renamed()` `renamedlfile = renamed and renamed[0] in lfiles` `islfile \|= renamedlfile` `if 'l' in fctx.flags():` `if renamedlfile:` `raise util.Abort(` `_('Renamed/copied largefile %s becomes symlink') % f)` `islfile = False` `if islfile:` `lfiles.add(f)` `else:` `normalfiles.add(f)` `if f in lfiles:` `dstfiles.append(lfutil.standin(f))` `# lfile in manifest if it has not been removed/renamed` `if f in ctx.manifest():` `if 'l' in ctx.filectx(f).flags():` `if renamed and renamed[0] in lfiles:` `raise util.Abort(_('largefile %s becomes symlink') % f)` `# lfile was modified, update standins` `fullpath = rdst.wjoin(f)` `lfutil.createdir(os.path.dirname(fullpath))` `m = util.sha1('')` `m.update(ctx[f].data())` `hash = m.hexdigest()` `if f not in lfiletohash or lfiletohash[f] != hash:` `try:` `fd = open(fullpath, 'wb')` `fd.write(ctx[f].data())` `finally:` `if fd:` `fd.close()` `executable = 'x' in ctx[f].flags()` `os.chmod(fullpath, lfutil.getmode(executable))` `lfutil.writestandin(rdst, lfutil.standin(f), hash,` `executable)` `lfiletohash[f] = hash` `else:` `# normal file` `dstfiles.append(f)` `def getfilectx(repo, memctx, f):` `if lfutil.isstandin(f):` `# if the file isn't in the manifest then it was removed` `# or renamed, raise IOError to indicate this` `srcfname = lfutil.splitstandin(f)` `try:` `fctx = ctx.filectx(srcfname)` `except error.LookupError:` `raise IOError()` `renamed = fctx.renamed()` `if renamed:` `# standin is always a lfile because lfileness` `# doesn't change after rename or copy` `renamed = lfutil.standin(renamed[0])` `return context.memfilectx(f, lfiletohash[srcfname], 'l' in` `fctx.flags(), 'x' in fctx.flags(), renamed)` `else:` `try:` `fctx = ctx.filectx(f)` `except error.LookupError:` `raise IOError()` `renamed = fctx.renamed()` `if renamed:` `renamed = renamed[0]` `data = fctx.data()` `if f == '.hgtags':` `newdata = []` `for line in data.splitlines():` `id, name = line.split(' ', 1)` `newdata.append('%s %s\n' % (node.hex(revmap[node.bin(id)]),` `name))` `data = ''.join(newdata)` `return context.memfilectx(f, data, 'l' in fctx.flags(),` `'x' in fctx.flags(), renamed)` `# Commit` `mctx = context.memctx(rdst, parents, ctx.description(), dstfiles,` `getfilectx, ctx.user(), ctx.date(), ctx.extra())` `ret = rdst.commitctx(mctx)` `rdst.dirstate.setparents(ret)` `revmap[ctx.node()] = rdst.changelog.tip()` `def _islfile(file, ctx, matcher, size):` `'''` `A file is a lfile if it matches a pattern or is over` `the given size.` `'''` `# Never store hgtags or hgignore as lfiles` `if file == '.hgtags' or file == '.hgignore' or file == '.hgsigs':` `return False` `if matcher and matcher(file):` `return True` `try:` `return ctx.filectx(file).size() >= size 1024 * 1024` `except error.LookupError:` `return False` `def uploadlfiles(ui, rsrc, rdst, files):` `'''upload largefiles to the central store'''` `# Don't upload locally. All largefiles are in the system wide cache` `# so the other repo can just get them from there.` `if not files or rdst.local():` `return` `store = basestore._openstore(rsrc, rdst, put=True)` `at = 0` `files = filter(lambda h: not store.exists(h), files)` `for hash in files:` `ui.progress(_('uploading largefiles'), at, unit='largefile', total=len(files))` `source = lfutil.findfile(rsrc, hash)` `if not source:` `raise util.Abort(_('Missing largefile %s needs to be uploaded') % hash)` `# XXX check for errors here` `store.put(source, hash)` `at += 1` `ui.progress('uploading largefiles', None)` `def verifylfiles(ui, repo, all=False, contents=False):` `'''Verify that every big file revision in the current changeset` `exists in the central store. With --contents, also verify that` `the contents of each big file revision are correct (SHA-1 hash` `matches the revision ID). With --all, check every changeset in` `this repository.'''` `if all:` `# Pass a list to the function rather than an iterator because we know a` `# list will work.` `revs = range(len(repo))` `else:` `revs = ['.']` `store = basestore._openstore(repo)` `return store.verify(revs, contents=contents)` `def cachelfiles(ui, repo, node):` `'''cachelfiles ensures that all largefiles needed by the specified revision` `are present in the repository's largefile cache.` `returns a tuple (cached, missing). cached is the list of files downloaded` `by this operation; missing is the list of files that were needed but could` `not be found.'''` `lfiles = lfutil.listlfiles(repo, node)` `toget = []` `for lfile in lfiles:` `expectedhash = repo[node][lfutil.standin(lfile)].data().strip()` `# if it exists and its hash matches, it might have been locally` `# modified before updating and the user chose 'local'. in this case,` `# it will not be in any store, so don't look for it.` `if (not os.path.exists(repo.wjoin(lfile)) \` `or expectedhash != lfutil.hashfile(repo.wjoin(lfile))) and \` `not lfutil.findfile(repo, expectedhash):` `toget.append((lfile, expectedhash))` `if toget:` `store = basestore._openstore(repo)` `ret = store.get(toget)` `return ret` `return ([], [])` `def updatelfiles(ui, repo, filelist=None, printmessage=True):` `wlock = repo.wlock()` `try:` `lfdirstate = lfutil.openlfdirstate(ui, repo)` `lfiles = set(lfutil.listlfiles(repo)) \| set(lfdirstate)` `if filelist is not None:` `lfiles = [f for f in lfiles if f in filelist]` `printed = False` `if printmessage and lfiles:` `ui.status(_('getting changed largefiles\n'))` `printed = True` `cachelfiles(ui, repo, '.')` `updated, removed = 0, 0` `for i in map(lambda f: _updatelfile(repo, lfdirstate, f), lfiles):` `# increment the appropriate counter according to _updatelfile's` `# return value` `updated += i > 0 and i or 0` `removed -= i < 0 and i or 0` `if printmessage and (removed or updated) and not printed:` `ui.status(_('getting changed largefiles\n'))` `printed = True` `lfdirstate.write()` `if printed and printmessage:` `ui.status(_('%d largefiles updated, %d removed\n') % (updated,` `removed))` `finally:` `wlock.release()` `def _updatelfile(repo, lfdirstate, lfile):` `'''updates a single largefile and copies the state of its standin from` `the repository's dirstate to its state in the lfdirstate.` `returns 1 if the file was modified, -1 if the file was removed, 0 if the` `file was unchanged, and None if the needed largefile was missing from the` `cache.'''` `ret = 0` `abslfile = repo.wjoin(lfile)` `absstandin = repo.wjoin(lfutil.standin(lfile))` `if os.path.exists(absstandin):` `if os.path.exists(absstandin+'.orig'):` `shutil.copyfile(abslfile, abslfile+'.orig')` `expecthash = lfutil.readstandin(repo, lfile)` `if expecthash != '' and \` `(not os.path.exists(abslfile) or \` `expecthash != lfutil.hashfile(abslfile)):` `if not lfutil.copyfromcache(repo, expecthash, lfile):` `return None # don't try to set the mode or update the dirstate` `ret = 1` `mode = os.stat(absstandin).st_mode` `if mode != os.stat(abslfile).st_mode:` `os.chmod(abslfile, mode)` `ret = 1` `else:` `if os.path.exists(abslfile):` `os.unlink(abslfile)` `ret = -1` `state = repo.dirstate[lfutil.standin(lfile)]` `if state == 'n':` `lfdirstate.normal(lfile)` `elif state == 'r':` `lfdirstate.remove(lfile)` `elif state == 'a':` `lfdirstate.add(lfile)` `elif state == '?':` `try:` `# Mercurial >= 1.9` `lfdirstate.drop(lfile)` `except AttributeError:` `# Mercurial <= 1.8` `lfdirstate.forget(lfile)` `return ret` `# -- hg commands declarations ------------------------------------------------` `cmdtable = {` `'lfconvert': (lfconvert,` `[('s', 'size', 0, 'All files over this size (in megabytes) '` `'will be considered largefiles. This can also be specified in '` `'your hgrc as [largefiles].size.'),` `('','tonormal',False,` `'Convert from a largefiles repo to a normal repo')],` `_('hg lfconvert SOURCE DEST [FILE ...]')),` `}`

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