Mercurial > hg
view mercurial/manifest.py @ 25005:5ddbb024c2e9
tests: fix hidden repeatability problem with age filter test
This test was corrupting later cases in mysterious ways because the
hash of the changeset was changing every day at midnight. This made it
hard to figure out why tests were consistently breaking after they
were consistently working.
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Tue, 12 May 2015 12:33:42 -0500 |
parents | 48583a1e44f3 |
children | b5052fc73300 |
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# manifest.py - manifest revision class for mercurial # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from i18n import _ import mdiff, parsers, error, revlog, util import array, struct import os propertycache = util.propertycache def _parsev1(data): # This method does a little bit of excessive-looking # precondition checking. This is so that the behavior of this # class exactly matches its C counterpart to try and help # prevent surprise breakage for anyone that develops against # the pure version. if data and data[-1] != '\n': raise ValueError('Manifest did not end in a newline.') prev = None for l in data.splitlines(): if prev is not None and prev > l: raise ValueError('Manifest lines not in sorted order.') prev = l f, n = l.split('\0') if len(n) > 40: yield f, revlog.bin(n[:40]), n[40:] else: yield f, revlog.bin(n), '' def _parsev2(data): metadataend = data.find('\n') # Just ignore metadata for now pos = metadataend + 1 prevf = '' while pos < len(data): end = data.find('\n', pos + 1) # +1 to skip stem length byte if end == -1: raise ValueError('Manifest ended with incomplete file entry.') stemlen = ord(data[pos]) items = data[pos + 1:end].split('\0') f = prevf[:stemlen] + items[0] if prevf > f: raise ValueError('Manifest entries not in sorted order.') fl = items[1] # Just ignore metadata (items[2:] for now) n = data[end + 1:end + 21] yield f, n, fl pos = end + 22 prevf = f def _parse(data): """Generates (path, node, flags) tuples from a manifest text""" if data.startswith('\0'): return iter(_parsev2(data)) else: return iter(_parsev1(data)) def _text(it, usemanifestv2): """Given an iterator over (path, node, flags) tuples, returns a manifest text""" if usemanifestv2: return _textv2(it) else: return _textv1(it) def _textv1(it): files = [] lines = [] _hex = revlog.hex for f, n, fl in it: files.append(f) # if this is changed to support newlines in filenames, # be sure to check the templates/ dir again (especially *-raw.tmpl) lines.append("%s\0%s%s\n" % (f, _hex(n), fl)) _checkforbidden(files) return ''.join(lines) def _textv2(it): files = [] lines = ['\0\n'] prevf = '' for f, n, fl in it: files.append(f) stem = os.path.commonprefix([prevf, f]) stemlen = min(len(stem), 255) lines.append("%c%s\0%s\n%s\n" % (stemlen, f[stemlen:], fl, n)) prevf = f _checkforbidden(files) return ''.join(lines) class _lazymanifest(dict): """This is the pure implementation of lazymanifest. It has not been optimized *at all* and is not lazy. """ def __init__(self, data): dict.__init__(self) for f, n, fl in _parse(data): self[f] = n, fl def __setitem__(self, k, v): node, flag = v assert node is not None if len(node) > 21: node = node[:21] # match c implementation behavior dict.__setitem__(self, k, (node, flag)) def __iter__(self): return iter(sorted(dict.keys(self))) def iterkeys(self): return iter(sorted(dict.keys(self))) def iterentries(self): return ((f, e[0], e[1]) for f, e in sorted(self.iteritems())) def copy(self): c = _lazymanifest('') c.update(self) return c def diff(self, m2, clean=False): '''Finds changes between the current manifest and m2.''' diff = {} for fn, e1 in self.iteritems(): if fn not in m2: diff[fn] = e1, (None, '') else: e2 = m2[fn] if e1 != e2: diff[fn] = e1, e2 elif clean: diff[fn] = None for fn, e2 in m2.iteritems(): if fn not in self: diff[fn] = (None, ''), e2 return diff def filtercopy(self, filterfn): c = _lazymanifest('') for f, n, fl in self.iterentries(): if filterfn(f): c[f] = n, fl return c def text(self): """Get the full data of this manifest as a bytestring.""" return _textv1(self.iterentries()) try: _lazymanifest = parsers.lazymanifest except AttributeError: pass class manifestdict(object): def __init__(self, data=''): if data.startswith('\0'): #_lazymanifest can not parse v2 self._lm = _lazymanifest('') for f, n, fl in _parsev2(data): self._lm[f] = n, fl else: self._lm = _lazymanifest(data) def __getitem__(self, key): return self._lm[key][0] def find(self, key): return self._lm[key] def __len__(self): return len(self._lm) def __setitem__(self, key, node): self._lm[key] = node, self.flags(key, '') def __contains__(self, key): return key in self._lm def __delitem__(self, key): del self._lm[key] def __iter__(self): return self._lm.__iter__() def iterkeys(self): return self._lm.iterkeys() def keys(self): return list(self.iterkeys()) def filesnotin(self, m2): '''Set of files in this manifest that are not in the other''' files = set(self) files.difference_update(m2) return files @propertycache def _dirs(self): return util.dirs(self) def dirs(self): return self._dirs def hasdir(self, dir): return dir in self._dirs def _filesfastpath(self, match): '''Checks whether we can correctly and quickly iterate over matcher files instead of over manifest files.''' files = match.files() return (len(files) < 100 and (match.isexact() or (not match.anypats() and util.all(fn in self for fn in files)))) def walk(self, match): '''Generates matching file names. Equivalent to manifest.matches(match).iterkeys(), but without creating an entirely new manifest. It also reports nonexistent files by marking them bad with match.bad(). ''' if match.always(): for f in iter(self): yield f return fset = set(match.files()) # avoid the entire walk if we're only looking for specific files if self._filesfastpath(match): for fn in sorted(fset): yield fn return for fn in self: if fn in fset: # specified pattern is the exact name fset.remove(fn) if match(fn): yield fn # for dirstate.walk, files=['.'] means "walk the whole tree". # follow that here, too fset.discard('.') for fn in sorted(fset): if not self.hasdir(fn): match.bad(fn, None) def matches(self, match): '''generate a new manifest filtered by the match argument''' if match.always(): return self.copy() if self._filesfastpath(match): m = manifestdict() lm = self._lm for fn in match.files(): if fn in lm: m._lm[fn] = lm[fn] return m m = manifestdict() m._lm = self._lm.filtercopy(match) return m def diff(self, m2, clean=False): '''Finds changes between the current manifest and m2. Args: m2: the manifest to which this manifest should be compared. clean: if true, include files unchanged between these manifests with a None value in the returned dictionary. The result is returned as a dict with filename as key and values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the nodeid in the current/other manifest and fl1/fl2 is the flag in the current/other manifest. Where the file does not exist, the nodeid will be None and the flags will be the empty string. ''' return self._lm.diff(m2._lm, clean) def setflag(self, key, flag): self._lm[key] = self[key], flag def get(self, key, default=None): try: return self._lm[key][0] except KeyError: return default def flags(self, key, default=''): try: return self._lm[key][1] except KeyError: return default def copy(self): c = manifestdict() c._lm = self._lm.copy() return c def iteritems(self): return (x[:2] for x in self._lm.iterentries()) def text(self, usemanifestv2=False): if usemanifestv2: return _textv2(self._lm.iterentries()) else: # use (probably) native version for v1 return self._lm.text() def fastdelta(self, base, changes): """Given a base manifest text as an array.array and a list of changes relative to that text, compute a delta that can be used by revlog. """ delta = [] dstart = None dend = None dline = [""] start = 0 # zero copy representation of base as a buffer addbuf = util.buffer(base) # start with a readonly loop that finds the offset of # each line and creates the deltas for f, todelete in changes: # bs will either be the index of the item or the insert point start, end = _msearch(addbuf, f, start) if not todelete: h, fl = self._lm[f] l = "%s\0%s%s\n" % (f, revlog.hex(h), fl) else: if start == end: # item we want to delete was not found, error out raise AssertionError( _("failed to remove %s from manifest") % f) l = "" if dstart is not None and dstart <= start and dend >= start: if dend < end: dend = end if l: dline.append(l) else: if dstart is not None: delta.append([dstart, dend, "".join(dline)]) dstart = start dend = end dline = [l] if dstart is not None: delta.append([dstart, dend, "".join(dline)]) # apply the delta to the base, and get a delta for addrevision deltatext, arraytext = _addlistdelta(base, delta) return arraytext, deltatext def _msearch(m, s, lo=0, hi=None): '''return a tuple (start, end) that says where to find s within m. If the string is found m[start:end] are the line containing that string. If start == end the string was not found and they indicate the proper sorted insertion point. m should be a buffer or a string s is a string''' def advance(i, c): while i < lenm and m[i] != c: i += 1 return i if not s: return (lo, lo) lenm = len(m) if not hi: hi = lenm while lo < hi: mid = (lo + hi) // 2 start = mid while start > 0 and m[start - 1] != '\n': start -= 1 end = advance(start, '\0') if m[start:end] < s: # we know that after the null there are 40 bytes of sha1 # this translates to the bisect lo = mid + 1 lo = advance(end + 40, '\n') + 1 else: # this translates to the bisect hi = mid hi = start end = advance(lo, '\0') found = m[lo:end] if s == found: # we know that after the null there are 40 bytes of sha1 end = advance(end + 40, '\n') return (lo, end + 1) else: return (lo, lo) def _checkforbidden(l): """Check filenames for illegal characters.""" for f in l: if '\n' in f or '\r' in f: raise error.RevlogError( _("'\\n' and '\\r' disallowed in filenames: %r") % f) # apply the changes collected during the bisect loop to our addlist # return a delta suitable for addrevision def _addlistdelta(addlist, x): # for large addlist arrays, building a new array is cheaper # than repeatedly modifying the existing one currentposition = 0 newaddlist = array.array('c') for start, end, content in x: newaddlist += addlist[currentposition:start] if content: newaddlist += array.array('c', content) currentposition = end newaddlist += addlist[currentposition:] deltatext = "".join(struct.pack(">lll", start, end, len(content)) + content for start, end, content in x) return deltatext, newaddlist def _splittopdir(f): if '/' in f: dir, subpath = f.split('/', 1) return dir + '/', subpath else: return '', f class treemanifest(object): def __init__(self, dir='', text=''): self._dir = dir self._dirs = {} # Using _lazymanifest here is a little slower than plain old dicts self._files = {} self._flags = {} self.parse(text) def _subpath(self, path): return self._dir + path def __len__(self): size = len(self._files) for m in self._dirs.values(): size += m.__len__() return size def _isempty(self): return (not self._files and (not self._dirs or util.all(m._isempty() for m in self._dirs.values()))) def __str__(self): return '<treemanifest dir=%s>' % self._dir def iteritems(self): for p, n in sorted(self._dirs.items() + self._files.items()): if p in self._files: yield self._subpath(p), n else: for f, sn in n.iteritems(): yield f, sn def iterkeys(self): for p in sorted(self._dirs.keys() + self._files.keys()): if p in self._files: yield self._subpath(p) else: for f in self._dirs[p].iterkeys(): yield f def keys(self): return list(self.iterkeys()) def __iter__(self): return self.iterkeys() def __contains__(self, f): if f is None: return False dir, subpath = _splittopdir(f) if dir: if dir not in self._dirs: return False return self._dirs[dir].__contains__(subpath) else: return f in self._files def get(self, f, default=None): dir, subpath = _splittopdir(f) if dir: if dir not in self._dirs: return default return self._dirs[dir].get(subpath, default) else: return self._files.get(f, default) def __getitem__(self, f): dir, subpath = _splittopdir(f) if dir: return self._dirs[dir].__getitem__(subpath) else: return self._files[f] def flags(self, f): dir, subpath = _splittopdir(f) if dir: if dir not in self._dirs: return '' return self._dirs[dir].flags(subpath) else: if f in self._dirs: return '' return self._flags.get(f, '') def find(self, f): dir, subpath = _splittopdir(f) if dir: return self._dirs[dir].find(subpath) else: return self._files[f], self._flags.get(f, '') def __delitem__(self, f): dir, subpath = _splittopdir(f) if dir: self._dirs[dir].__delitem__(subpath) # If the directory is now empty, remove it if self._dirs[dir]._isempty(): del self._dirs[dir] else: del self._files[f] if f in self._flags: del self._flags[f] def __setitem__(self, f, n): assert n is not None dir, subpath = _splittopdir(f) if dir: if dir not in self._dirs: self._dirs[dir] = treemanifest(self._subpath(dir)) self._dirs[dir].__setitem__(subpath, n) else: self._files[f] = n[:21] # to match manifestdict's behavior def setflag(self, f, flags): """Set the flags (symlink, executable) for path f.""" dir, subpath = _splittopdir(f) if dir: if dir not in self._dirs: self._dirs[dir] = treemanifest(self._subpath(dir)) self._dirs[dir].setflag(subpath, flags) else: self._flags[f] = flags def copy(self): copy = treemanifest(self._dir) for d in self._dirs: copy._dirs[d] = self._dirs[d].copy() copy._files = dict.copy(self._files) copy._flags = dict.copy(self._flags) return copy def filesnotin(self, m2): '''Set of files in this manifest that are not in the other''' files = set() def _filesnotin(t1, t2): for d, m1 in t1._dirs.iteritems(): if d in t2._dirs: m2 = t2._dirs[d] _filesnotin(m1, m2) else: files.update(m1.iterkeys()) for fn in t1._files.iterkeys(): if fn not in t2._files: files.add(t1._subpath(fn)) _filesnotin(self, m2) return files @propertycache def _alldirs(self): return util.dirs(self) def dirs(self): return self._alldirs def hasdir(self, dir): topdir, subdir = _splittopdir(dir) if topdir: if topdir in self._dirs: return self._dirs[topdir].hasdir(subdir) return False return (dir + '/') in self._dirs def walk(self, match): '''Generates matching file names. Equivalent to manifest.matches(match).iterkeys(), but without creating an entirely new manifest. It also reports nonexistent files by marking them bad with match.bad(). ''' if match.always(): for f in iter(self): yield f return fset = set(match.files()) for fn in self._walk(match): if fn in fset: # specified pattern is the exact name fset.remove(fn) yield fn # for dirstate.walk, files=['.'] means "walk the whole tree". # follow that here, too fset.discard('.') for fn in sorted(fset): if not self.hasdir(fn): match.bad(fn, None) def _walk(self, match, alldirs=False): '''Recursively generates matching file names for walk(). Will visit all subdirectories if alldirs is True, otherwise it will only visit subdirectories for which match.visitdir is True.''' if not alldirs: # substring to strip trailing slash visit = match.visitdir(self._dir[:-1] or '.') if not visit: return alldirs = (visit == 'all') # yield this dir's files and walk its submanifests for p in sorted(self._dirs.keys() + self._files.keys()): if p in self._files: fullp = self._subpath(p) if match(fullp): yield fullp else: for f in self._dirs[p]._walk(match, alldirs): yield f def matches(self, match): '''generate a new manifest filtered by the match argument''' if match.always(): return self.copy() return self._matches(match) def _matches(self, match, alldirs=False): '''recursively generate a new manifest filtered by the match argument. Will visit all subdirectories if alldirs is True, otherwise it will only visit subdirectories for which match.visitdir is True.''' ret = treemanifest(self._dir) if not alldirs: # substring to strip trailing slash visit = match.visitdir(self._dir[:-1] or '.') if not visit: return ret alldirs = (visit == 'all') for fn in self._files: fullp = self._subpath(fn) if not match(fullp): continue ret._files[fn] = self._files[fn] if fn in self._flags: ret._flags[fn] = self._flags[fn] for dir, subm in self._dirs.iteritems(): m = subm._matches(match, alldirs) if not m._isempty(): ret._dirs[dir] = m return ret def diff(self, m2, clean=False): '''Finds changes between the current manifest and m2. Args: m2: the manifest to which this manifest should be compared. clean: if true, include files unchanged between these manifests with a None value in the returned dictionary. The result is returned as a dict with filename as key and values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the nodeid in the current/other manifest and fl1/fl2 is the flag in the current/other manifest. Where the file does not exist, the nodeid will be None and the flags will be the empty string. ''' result = {} emptytree = treemanifest() def _diff(t1, t2): for d, m1 in t1._dirs.iteritems(): m2 = t2._dirs.get(d, emptytree) _diff(m1, m2) for d, m2 in t2._dirs.iteritems(): if d not in t1._dirs: _diff(emptytree, m2) for fn, n1 in t1._files.iteritems(): fl1 = t1._flags.get(fn, '') n2 = t2._files.get(fn, None) fl2 = t2._flags.get(fn, '') if n1 != n2 or fl1 != fl2: result[t1._subpath(fn)] = ((n1, fl1), (n2, fl2)) elif clean: result[t1._subpath(fn)] = None for fn, n2 in t2._files.iteritems(): if fn not in t1._files: fl2 = t2._flags.get(fn, '') result[t2._subpath(fn)] = ((None, ''), (n2, fl2)) _diff(self, m2) return result def parse(self, text): for f, n, fl in _parse(text): self[f] = n if fl: self.setflag(f, fl) def text(self, usemanifestv2=False): """Get the full data of this manifest as a bytestring.""" flags = self.flags return _text(((f, self[f], flags(f)) for f in self.keys()), usemanifestv2) class manifest(revlog.revlog): def __init__(self, opener): # During normal operations, we expect to deal with not more than four # revs at a time (such as during commit --amend). When rebasing large # stacks of commits, the number can go up, hence the config knob below. cachesize = 4 usetreemanifest = False usemanifestv2 = False opts = getattr(opener, 'options', None) if opts is not None: cachesize = opts.get('manifestcachesize', cachesize) usetreemanifest = opts.get('treemanifest', usetreemanifest) usemanifestv2 = opts.get('manifestv2', usemanifestv2) self._mancache = util.lrucachedict(cachesize) revlog.revlog.__init__(self, opener, "00manifest.i") self._treeinmem = usetreemanifest self._treeondisk = usetreemanifest self._usemanifestv2 = usemanifestv2 def _newmanifest(self, data=''): if self._treeinmem: return treemanifest('', data) return manifestdict(data) def _slowreaddelta(self, node): r0 = self.deltaparent(self.rev(node)) m0 = self.read(self.node(r0)) m1 = self.read(node) md = self._newmanifest() for f, ((n0, fl0), (n1, fl1)) in m0.diff(m1).iteritems(): if n1: md[f] = n1 if fl1: md.setflag(f, fl1) return md def readdelta(self, node): if self._usemanifestv2 or self._treeondisk: return self._slowreaddelta(node) r = self.rev(node) d = mdiff.patchtext(self.revdiff(self.deltaparent(r), r)) return self._newmanifest(d) def readfast(self, node): '''use the faster of readdelta or read This will return a manifest which is either only the files added/modified relative to p1, or all files in the manifest. Which one is returned depends on the codepath used to retrieve the data. ''' r = self.rev(node) deltaparent = self.deltaparent(r) if deltaparent != revlog.nullrev and deltaparent in self.parentrevs(r): return self.readdelta(node) return self.read(node) def read(self, node): if node == revlog.nullid: return self._newmanifest() # don't upset local cache if node in self._mancache: return self._mancache[node][0] text = self.revision(node) arraytext = array.array('c', text) m = self._newmanifest(text) self._mancache[node] = (m, arraytext) return m def find(self, node, f): '''look up entry for a single file efficiently. return (node, flags) pair if found, (None, None) if not.''' m = self.read(node) try: return m.find(f) except KeyError: return None, None def add(self, m, transaction, link, p1, p2, added, removed): if (p1 in self._mancache and not self._treeinmem and not self._usemanifestv2): # If our first parent is in the manifest cache, we can # compute a delta here using properties we know about the # manifest up-front, which may save time later for the # revlog layer. _checkforbidden(added) # combine the changed lists into one list for sorting work = [(x, False) for x in added] work.extend((x, True) for x in removed) # this could use heapq.merge() (from Python 2.6+) or equivalent # since the lists are already sorted work.sort() arraytext, deltatext = m.fastdelta(self._mancache[p1][1], work) cachedelta = self.rev(p1), deltatext text = util.buffer(arraytext) n = self.addrevision(text, transaction, link, p1, p2, cachedelta) else: # The first parent manifest isn't already loaded, so we'll # just encode a fulltext of the manifest and pass that # through to the revlog layer, and let it handle the delta # process. text = m.text(self._usemanifestv2) arraytext = array.array('c', text) n = self.addrevision(text, transaction, link, p1, p2) self._mancache[n] = (m, arraytext) return n