Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/manifest.py @ 4839:edd07be943dd
hgwebdir: check for repo foo before browsing subdirectories of foo/
author | Brendan Cully <brendan@kublai.com> |
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date | Sat, 07 Jul 2007 21:55:56 -0700 |
parents | 63b9d2deed48 |
children | e45fc5d03798 |
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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, incorporated herein by reference. from revlog import * from i18n import _ import array, bisect, struct, mdiff class manifestdict(dict): def __init__(self, mapping=None, flags=None): if mapping is None: mapping = {} if flags is None: flags = {} dict.__init__(self, mapping) self._flags = flags def flags(self, f): return self._flags.get(f, "") def execf(self, f): "test for executable in manifest flags" return "x" in self.flags(f) def linkf(self, f): "test for symlink in manifest flags" return "l" in self.flags(f) def rawset(self, f, entry): self[f] = bin(entry[:40]) fl = entry[40:-1] if fl: self._flags[f] = fl def set(self, f, execf=False, linkf=False): if linkf: self._flags[f] = "l" elif execf: self._flags[f] = "x" else: self._flags[f] = "" def copy(self): return manifestdict(dict.copy(self), dict.copy(self._flags)) class manifest(revlog): def __init__(self, opener): self.mapcache = None self.listcache = None revlog.__init__(self, opener, "00manifest.i") def parselines(self, lines): for l in lines.splitlines(1): yield l.split('\0') def readdelta(self, node): delta = mdiff.patchtext(self.delta(node)) deltamap = manifestdict() for f, n in self.parselines(delta): deltamap.rawset(f, n) return deltamap def read(self, node): if node == nullid: return manifestdict() # don't upset local cache if self.mapcache and self.mapcache[0] == node: return self.mapcache[1] text = self.revision(node) self.listcache = array.array('c', text) mapping = manifestdict() for f, n in self.parselines(text): mapping.rawset(f, n) self.mapcache = (node, mapping) return mapping def _search(self, 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. This was taken from bisect_left, and modified to find line start/end as it goes along. 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 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 cmp(s, found) == 0: # 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 find(self, node, f): '''look up entry for a single file efficiently. return (node, flags) pair if found, (None, None) if not.''' if self.mapcache and node == self.mapcache[0]: return self.mapcache[1].get(f), self.mapcache[1].flags(f) text = self.revision(node) start, end = self._search(text, f) if start == end: return None, None l = text[start:end] f, n = l.split('\0') return bin(n[:40]), n[40:-1] def add(self, map, transaction, link, p1=None, p2=None, changed=None): # apply the changes collected during the bisect loop to our addlist # return a delta suitable for addrevision def addlistdelta(addlist, x): # start from the bottom up # so changes to the offsets don't mess things up. i = len(x) while i > 0: i -= 1 start = x[i][0] end = x[i][1] if x[i][2]: addlist[start:end] = array.array('c', x[i][2]) else: del addlist[start:end] return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] for d in x ]) def checkforbidden(f): if '\n' in f or '\r' in f: raise RevlogError(_("'\\n' and '\\r' disallowed in filenames")) # if we're using the listcache, make sure it is valid and # parented by the same node we're diffing against if not (changed and self.listcache and p1 and self.mapcache[0] == p1): files = map.keys() files.sort() for f in files: checkforbidden(f) # if this is changed to support newlines in filenames, # be sure to check the templates/ dir again (especially *-raw.tmpl) text = ["%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) for f in files] self.listcache = array.array('c', "".join(text)) cachedelta = None else: addlist = self.listcache for f in changed[0]: checkforbidden(f) # combine the changed lists into one list for sorting work = [[x, 0] for x in changed[0]] work[len(work):] = [[x, 1] for x in changed[1]] work.sort() delta = [] dstart = None dend = None dline = [""] start = 0 # zero copy representation of addlist as a buffer addbuf = buffer(addlist) # start with a readonly loop that finds the offset of # each line and creates the deltas for w in work: f = w[0] # bs will either be the index of the item or the insert point start, end = self._search(addbuf, f, start) if w[1] == 0: l = "%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) else: l = "" if start == end and w[1] == 1: # item we want to delete was not found, error out raise AssertionError( _("failed to remove %s from manifest") % f) if dstart != None and dstart <= start and dend >= start: if dend < end: dend = end if l: dline.append(l) else: if dstart != None: delta.append([dstart, dend, "".join(dline)]) dstart = start dend = end dline = [l] if dstart != None: delta.append([dstart, dend, "".join(dline)]) # apply the delta to the addlist, and get a delta for addrevision cachedelta = addlistdelta(addlist, delta) # the delta is only valid if we've been processing the tip revision if self.mapcache[0] != self.tip(): cachedelta = None self.listcache = addlist n = self.addrevision(buffer(self.listcache), transaction, link, p1, p2, cachedelta) self.mapcache = (n, map) return n