author | Eric Hopper <hopper@omnifarious.org> |
Tue, 11 Oct 2005 18:56:47 -0700 | |
changeset 1466 | b6d9ea0bc107 |
parent 1463 | 26e73acc0cdf |
child 1469 | 0847c45ffee6 |
permissions | -rw-r--r-- |
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""" |
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revlog.py - storage back-end for mercurial |
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This provides efficient delta storage with O(1) retrieve and append |
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and O(changes) merge between branches |
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Copyright 2005 Matt Mackall <mpm@selenic.com> |
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This software may be used and distributed according to the terms |
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of the GNU General Public License, incorporated herein by reference. |
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""" |
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from node import * |
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from demandload import demandload |
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demandload(globals(), "binascii errno heapq mdiff sha struct zlib") |
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def hash(text, p1, p2): |
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"""generate a hash from the given text and its parent hashes |
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This hash combines both the current file contents and its history |
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in a manner that makes it easy to distinguish nodes with the same |
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content in the revision graph. |
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""" |
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l = [p1, p2] |
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l.sort() |
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s = sha.new(l[0]) |
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s.update(l[1]) |
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s.update(text) |
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return s.digest() |
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def compress(text): |
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""" generate a possibly-compressed representation of text """ |
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if not text: return text |
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if len(text) < 44: |
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if text[0] == '\0': return text |
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return 'u' + text |
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bin = zlib.compress(text) |
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if len(bin) > len(text): |
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if text[0] == '\0': return text |
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return 'u' + text |
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return bin |
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def decompress(bin): |
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""" decompress the given input """ |
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if not bin: return bin |
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t = bin[0] |
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if t == '\0': return bin |
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if t == 'x': return zlib.decompress(bin) |
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if t == 'u': return bin[1:] |
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raise RevlogError("unknown compression type %s" % t) |
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indexformat = ">4l20s20s20s" |
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class lazyparser: |
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""" |
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this class avoids the need to parse the entirety of large indices |
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By default we parse and load 1000 entries at a time. |
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If no position is specified, we load the whole index, and replace |
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the lazy objects in revlog with the underlying objects for |
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efficiency in cases where we look at most of the nodes. |
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""" |
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def __init__(self, data, revlog): |
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self.data = data |
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self.s = struct.calcsize(indexformat) |
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self.l = len(data)/self.s |
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self.index = [None] * self.l |
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self.map = {nullid: -1} |
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self.all = 0 |
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self.revlog = revlog |
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def load(self, pos=None): |
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if self.all: return |
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if pos is not None: |
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block = pos / 1000 |
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i = block * 1000 |
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end = min(self.l, i + 1000) |
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else: |
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self.all = 1 |
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i = 0 |
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end = self.l |
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self.revlog.index = self.index |
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self.revlog.nodemap = self.map |
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while i < end: |
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d = self.data[i * self.s: (i + 1) * self.s] |
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e = struct.unpack(indexformat, d) |
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self.index[i] = e |
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self.map[e[6]] = i |
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i += 1 |
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class lazyindex: |
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"""a lazy version of the index array""" |
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def __init__(self, parser): |
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self.p = parser |
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def __len__(self): |
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return len(self.p.index) |
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def load(self, pos): |
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self.p.load(pos) |
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return self.p.index[pos] |
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def __getitem__(self, pos): |
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return self.p.index[pos] or self.load(pos) |
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def append(self, e): |
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self.p.index.append(e) |
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class lazymap: |
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"""a lazy version of the node map""" |
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def __init__(self, parser): |
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self.p = parser |
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def load(self, key): |
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if self.p.all: return |
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n = self.p.data.find(key) |
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if n < 0: |
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raise KeyError(key) |
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pos = n / self.p.s |
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self.p.load(pos) |
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def __contains__(self, key): |
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self.p.load() |
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return key in self.p.map |
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def __iter__(self): |
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yield nullid |
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for i in xrange(self.p.l): |
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try: |
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yield self.p.index[i][6] |
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except: |
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self.p.load(i) |
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yield self.p.index[i][6] |
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def __getitem__(self, key): |
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try: |
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return self.p.map[key] |
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except KeyError: |
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try: |
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self.load(key) |
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return self.p.map[key] |
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except KeyError: |
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raise KeyError("node " + hex(key)) |
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def __setitem__(self, key, val): |
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self.p.map[key] = val |
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class RevlogError(Exception): pass |
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class revlog: |
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""" |
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the underlying revision storage object |
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A revlog consists of two parts, an index and the revision data. |
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The index is a file with a fixed record size containing |
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information on each revision, includings its nodeid (hash), the |
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nodeids of its parents, the position and offset of its data within |
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the data file, and the revision it's based on. Finally, each entry |
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contains a linkrev entry that can serve as a pointer to external |
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data. |
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The revision data itself is a linear collection of data chunks. |
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Each chunk represents a revision and is usually represented as a |
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delta against the previous chunk. To bound lookup time, runs of |
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deltas are limited to about 2 times the length of the original |
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version data. This makes retrieval of a version proportional to |
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its size, or O(1) relative to the number of revisions. |
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Both pieces of the revlog are written to in an append-only |
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fashion, which means we never need to rewrite a file to insert or |
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remove data, and can use some simple techniques to avoid the need |
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for locking while reading. |
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""" |
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def __init__(self, opener, indexfile, datafile): |
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""" |
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create a revlog object |
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opener is a function that abstracts the file opening operation |
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and can be used to implement COW semantics or the like. |
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""" |
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self.indexfile = indexfile |
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self.datafile = datafile |
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self.opener = opener |
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self.cache = None |
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try: |
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i = self.opener(self.indexfile).read() |
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except IOError, inst: |
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if inst.errno != errno.ENOENT: |
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raise |
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i = "" |
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if len(i) > 10000: |
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# big index, let's parse it on demand |
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parser = lazyparser(i, self) |
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self.index = lazyindex(parser) |
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self.nodemap = lazymap(parser) |
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else: |
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s = struct.calcsize(indexformat) |
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l = len(i) / s |
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self.index = [None] * l |
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m = [None] * l |
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n = 0 |
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for f in xrange(0, len(i), s): |
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# offset, size, base, linkrev, p1, p2, nodeid |
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e = struct.unpack(indexformat, i[f:f + s]) |
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202 |
m[n] = (e[6], n) |
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203 |
self.index[n] = e |
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n += 1 |
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205 |
|
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206 |
self.nodemap = dict(m) |
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207 |
self.nodemap[nullid] = -1 |
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|
208 |
|
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209 |
def tip(self): return self.node(len(self.index) - 1) |
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210 |
def count(self): return len(self.index) |
26 | 211 |
def node(self, rev): return (rev < 0) and nullid or self.index[rev][6] |
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212 |
def rev(self, node): |
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213 |
try: |
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return self.nodemap[node] |
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215 |
except KeyError: |
1214 | 216 |
raise RevlogError('%s: no node %s' % (self.indexfile, hex(node))) |
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217 |
def linkrev(self, node): return self.index[self.rev(node)][3] |
2 | 218 |
def parents(self, node): |
219 |
if node == nullid: return (nullid, nullid) |
|
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return self.index[self.rev(node)][4:6] |
0
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221 |
|
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222 |
def start(self, rev): return self.index[rev][0] |
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223 |
def length(self, rev): return self.index[rev][1] |
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def end(self, rev): return self.start(rev) + self.length(rev) |
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225 |
def base(self, rev): return self.index[rev][2] |
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226 |
|
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def reachable(self, rev, stop=None): |
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reachable = {} |
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visit = [rev] |
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reachable[rev] = 1 |
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if stop: |
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stopn = self.rev(stop) |
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233 |
else: |
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stopn = 0 |
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while visit: |
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n = visit.pop(0) |
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if n == stop: |
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continue |
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if n == nullid: |
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continue |
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for p in self.parents(n): |
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if self.rev(p) < stopn: |
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continue |
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if p not in reachable: |
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reachable[p] = 1 |
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visit.append(p) |
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return reachable |
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248 |
|
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249 |
def nodesbetween(self, roots=None, heads=None): |
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"""Return a tuple containing three elements. Elements 1 and 2 contain |
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a final list bases and heads after all the unreachable ones have been |
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pruned. Element 0 contains a topologically sorted list of all |
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253 |
|
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254 |
nodes that satisfy these constraints: |
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255 |
1. All nodes must be descended from a node in roots (the nodes on |
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256 |
roots are considered descended from themselves). |
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257 |
2. All nodes must also be ancestors of a node in heads (the nodes in |
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|
258 |
heads are considered to be their own ancestors). |
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|
259 |
|
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260 |
If roots is unspecified, nullid is assumed as the only root. |
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|
261 |
If heads is unspecified, it is taken to be the output of the |
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|
262 |
heads method (i.e. a list of all nodes in the repository that |
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|
263 |
have no children).""" |
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|
264 |
nonodes = ([], [], []) |
1457
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265 |
if roots is not None: |
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266 |
roots = list(roots) |
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|
267 |
if not roots: |
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|
268 |
return nonodes |
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|
269 |
lowestrev = min([self.rev(n) for n in roots]) |
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|
270 |
else: |
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|
271 |
roots = [nullid] # Everybody's a descendent of nullid |
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|
272 |
lowestrev = -1 |
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|
273 |
if (lowestrev == -1) and (heads is None): |
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|
274 |
# We want _all_ the nodes! |
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|
275 |
return ([self.node(r) for r in xrange(0, self.count())], |
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|
276 |
[nullid], list(self.heads())) |
518da3c3b6ce
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|
277 |
if heads is None: |
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This implements the nodesbetween method, and it removes the newer method
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diff
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|
278 |
# All nodes are ancestors, so the latest ancestor is the last |
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|
279 |
# node. |
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|
280 |
highestrev = self.count() - 1 |
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|
281 |
# Set ancestors to None to signal that every node is an ancestor. |
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|
282 |
ancestors = None |
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|
283 |
# Set heads to an empty dictionary for later discovery of heads |
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|
284 |
heads = {} |
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|
285 |
else: |
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|
286 |
heads = list(heads) |
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|
287 |
if not heads: |
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|
288 |
return nonodes |
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|
289 |
ancestors = {} |
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|
290 |
# Start at the top and keep marking parents until we're done. |
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|
291 |
nodestotag = heads[:] |
1457
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|
292 |
# Turn heads into a dictionary so we can remove 'fake' heads. |
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|
293 |
# Also, later we will be using it to filter out the heads we can't |
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|
294 |
# find from roots. |
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|
295 |
heads = dict.fromkeys(heads, 0) |
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|
296 |
# Remember where the top was so we can use it as a limit later. |
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|
297 |
highestrev = max([self.rev(n) for n in nodestotag]) |
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|
298 |
while nodestotag: |
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|
299 |
# grab a node to tag |
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|
300 |
n = nodestotag.pop() |
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|
301 |
# Never tag nullid |
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|
302 |
if n == nullid: |
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|
303 |
continue |
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|
304 |
# A node's revision number represents its place in a |
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|
305 |
# topologically sorted list of nodes. |
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This implements the nodesbetween method, and it removes the newer method
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|
306 |
r = self.rev(n) |
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|
307 |
if r >= lowestrev: |
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This implements the nodesbetween method, and it removes the newer method
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|
308 |
if n not in ancestors: |
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|
309 |
# If we are possibly a descendent of one of the roots |
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|
310 |
# and we haven't already been marked as an ancestor |
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|
311 |
ancestors[n] = 1 # Mark as ancestor |
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|
312 |
# Add non-nullid parents to list of nodes to tag. |
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|
313 |
nodestotag.extend([p for p in self.parents(n) if |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
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|
314 |
p != nullid]) |
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changeset
|
315 |
elif n in heads: # We've seen it before, is it a fake head? |
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This implements the nodesbetween method, and it removes the newer method
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|
316 |
# So it is, real heads should not be the ancestors of |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
317 |
# any other heads. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
318 |
heads.pop(n) |
1459
106fdec8e1fb
Fix small bug in nodesbetween if heads is [nullid].
Eric Hopper <hopper@omnifarious.org>
parents:
1458
diff
changeset
|
319 |
if not ancestors: |
1463
26e73acc0cdf
Fix to handle case of empty list for roots or heads in nodesbetween.
Eric Hopper <hopper@omnifarious.org>
parents:
1459
diff
changeset
|
320 |
return nonodes |
1457
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
321 |
# Now that we have our set of ancestors, we want to remove any |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
322 |
# roots that are not ancestors. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
323 |
|
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
324 |
# If one of the roots was nullid, everything is included anyway. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
325 |
if lowestrev > -1: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
326 |
# But, since we weren't, let's recompute the lowest rev to not |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
327 |
# include roots that aren't ancestors. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
328 |
|
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
329 |
# Filter out roots that aren't ancestors of heads |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
330 |
roots = [n for n in roots if n in ancestors] |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
331 |
# Recompute the lowest revision |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
332 |
if roots: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
333 |
lowestrev = min([self.rev(n) for n in roots]) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
334 |
else: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
335 |
# No more roots? Return empty list |
1463
26e73acc0cdf
Fix to handle case of empty list for roots or heads in nodesbetween.
Eric Hopper <hopper@omnifarious.org>
parents:
1459
diff
changeset
|
336 |
return nonodes |
1457
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
337 |
else: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
338 |
# We are descending from nullid, and don't need to care about |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
339 |
# any other roots. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
340 |
lowestrev = -1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
341 |
roots = [nullid] |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
342 |
# Transform our roots list into a 'set' (i.e. a dictionary where the |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
343 |
# values don't matter. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
344 |
descendents = dict.fromkeys(roots, 1) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
345 |
# Also, keep the original roots so we can filter out roots that aren't |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
346 |
# 'real' roots (i.e. are descended from other roots). |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
347 |
roots = descendents.copy() |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
348 |
# Our topologically sorted list of output nodes. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
349 |
orderedout = [] |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
350 |
# Don't start at nullid since we don't want nullid in our output list, |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
351 |
# and if nullid shows up in descedents, empty parents will look like |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
352 |
# they're descendents. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
353 |
for r in xrange(max(lowestrev, 0), highestrev + 1): |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
354 |
n = self.node(r) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
355 |
isdescendent = False |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
356 |
if lowestrev == -1: # Everybody is a descendent of nullid |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
357 |
isdescendent = True |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
358 |
elif n in descendents: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
359 |
# n is already a descendent |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
360 |
isdescendent = True |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
361 |
# This check only needs to be done here because all the roots |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
362 |
# will start being marked is descendents before the loop. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
363 |
if n in roots: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
364 |
# If n was a root, check if it's a 'real' root. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
365 |
p = tuple(self.parents(n)) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
366 |
# If any of its parents are descendents, it's not a root. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
367 |
if (p[0] in descendents) or (p[1] in descendents): |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
368 |
roots.pop(n) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
369 |
else: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
370 |
p = tuple(self.parents(n)) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
371 |
# A node is a descendent if either of its parents are |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
372 |
# descendents. (We seeded the dependents list with the roots |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
373 |
# up there, remember?) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
374 |
if (p[0] in descendents) or (p[1] in descendents): |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
375 |
descendents[n] = 1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
376 |
isdescendent = True |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
377 |
if isdescendent and ((ancestors is None) or (n in ancestors)): |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
378 |
# Only include nodes that are both descendents and ancestors. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
379 |
orderedout.append(n) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
380 |
if (ancestors is not None) and (n in heads): |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
381 |
# We're trying to figure out which heads are reachable |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
382 |
# from roots. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
383 |
# Mark this head as having been reached |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
384 |
heads[n] = 1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
385 |
elif ancestors is None: |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
386 |
# Otherwise, we're trying to discover the heads. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
387 |
# Assume this is a head because if it isn't, the next step |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
388 |
# will eventually remove it. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
389 |
heads[n] = 1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
390 |
# But, obviously its parents aren't. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
391 |
for p in self.parents(n): |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
392 |
heads.pop(p, None) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
393 |
heads = [n for n in heads.iterkeys() if heads[n] != 0] |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
394 |
roots = roots.keys() |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
395 |
assert orderedout |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
396 |
assert roots |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
397 |
assert heads |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
398 |
return (orderedout, roots, heads) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
399 |
|
902 | 400 |
def heads(self, stop=None): |
1083 | 401 |
"""return the list of all nodes that have no children""" |
221 | 402 |
p = {} |
403 |
h = [] |
|
902 | 404 |
stoprev = 0 |
405 |
if stop and stop in self.nodemap: |
|
406 |
stoprev = self.rev(stop) |
|
1083 | 407 |
|
243 | 408 |
for r in range(self.count() - 1, -1, -1): |
221 | 409 |
n = self.node(r) |
410 |
if n not in p: |
|
411 |
h.append(n) |
|
902 | 412 |
if n == stop: |
413 |
break |
|
414 |
if r < stoprev: |
|
415 |
break |
|
221 | 416 |
for pn in self.parents(n): |
417 |
p[pn] = 1 |
|
418 |
return h |
|
370 | 419 |
|
420 |
def children(self, node): |
|
1083 | 421 |
"""find the children of a given node""" |
370 | 422 |
c = [] |
423 |
p = self.rev(node) |
|
424 |
for r in range(p + 1, self.count()): |
|
425 |
n = self.node(r) |
|
426 |
for pn in self.parents(n): |
|
854
473c030d34a6
Fixed revlog.children.
Tristan Wibberley <tristan@wibberley.org>
parents:
655
diff
changeset
|
427 |
if pn == node: |
473c030d34a6
Fixed revlog.children.
Tristan Wibberley <tristan@wibberley.org>
parents:
655
diff
changeset
|
428 |
c.append(n) |
370 | 429 |
continue |
430 |
elif pn == nullid: |
|
431 |
continue |
|
432 |
return c |
|
515 | 433 |
|
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
434 |
def lookup(self, id): |
1083 | 435 |
"""locate a node based on revision number or subset of hex nodeid""" |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
436 |
try: |
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
437 |
rev = int(id) |
469 | 438 |
if str(rev) != id: raise ValueError |
439 |
if rev < 0: rev = self.count() + rev |
|
476
0a338d506268
Really _call_ method revlog.count in revlog.lookup()
Thomas Arendsen Hein <thomas@intevation.de>
parents:
469
diff
changeset
|
440 |
if rev < 0 or rev >= self.count(): raise ValueError |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
441 |
return self.node(rev) |
469 | 442 |
except (ValueError, OverflowError): |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
443 |
c = [] |
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
444 |
for n in self.nodemap: |
469 | 445 |
if hex(n).startswith(id): |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
446 |
c.append(n) |
1232
eb3cc5e2eb89
Revert some exception type changes in revlog
mpm@selenic.com
parents:
1218
diff
changeset
|
447 |
if len(c) > 1: raise KeyError("Ambiguous identifier") |
eb3cc5e2eb89
Revert some exception type changes in revlog
mpm@selenic.com
parents:
1218
diff
changeset
|
448 |
if len(c) < 1: raise KeyError("No match found") |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
449 |
return c[0] |
515 | 450 |
|
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
451 |
return None |
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
452 |
|
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
453 |
def diff(self, a, b): |
1083 | 454 |
"""return a delta between two revisions""" |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
455 |
return mdiff.textdiff(a, b) |
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
456 |
|
73 | 457 |
def patches(self, t, pl): |
1083 | 458 |
"""apply a list of patches to a string""" |
73 | 459 |
return mdiff.patches(t, pl) |
460 |
||
119
c7a66f9752a4
Add code to retrieve or construct a revlog delta
mpm@selenic.com
parents:
117
diff
changeset
|
461 |
def delta(self, node): |
1083 | 462 |
"""return or calculate a delta between a node and its predecessor""" |
119
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|
463 |
r = self.rev(node) |
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|
464 |
b = self.base(r) |
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|
465 |
if r == b: |
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|
466 |
return self.diff(self.revision(self.node(r - 1)), |
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diff
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|
467 |
self.revision(node)) |
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|
468 |
else: |
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|
469 |
f = self.opener(self.datafile) |
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470 |
f.seek(self.start(r)) |
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|
471 |
data = f.read(self.length(r)) |
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472 |
return decompress(data) |
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|
473 |
|
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|
474 |
def revision(self, node): |
1083 | 475 |
"""return an uncompressed revision of a given""" |
36
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|
476 |
if node == nullid: return "" |
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|
477 |
if self.cache and self.cache[0] == node: return self.cache[2] |
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|
478 |
|
1083 | 479 |
# look up what we need to read |
0
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|
480 |
text = None |
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|
481 |
rev = self.rev(node) |
117 | 482 |
start, length, base, link, p1, p2, node = self.index[rev] |
483 |
end = start + length |
|
484 |
if base != rev: start = self.start(base) |
|
0
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|
485 |
|
1083 | 486 |
# do we have useful data cached? |
0
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|
487 |
if self.cache and self.cache[1] >= base and self.cache[1] < rev: |
9117c6561b0b
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|
488 |
base = self.cache[1] |
9117c6561b0b
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|
489 |
start = self.start(base + 1) |
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|
490 |
text = self.cache[2] |
9117c6561b0b
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|
491 |
last = 0 |
9117c6561b0b
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|
492 |
|
9117c6561b0b
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parents:
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|
493 |
f = self.opener(self.datafile) |
9117c6561b0b
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|
494 |
f.seek(start) |
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|
495 |
data = f.read(end - start) |
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|
496 |
|
651 | 497 |
if text is None: |
0
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|
498 |
last = self.length(base) |
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|
499 |
text = decompress(data[:last]) |
9117c6561b0b
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|
500 |
|
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diff
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|
501 |
bins = [] |
64 | 502 |
for r in xrange(base + 1, rev + 1): |
0
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|
503 |
s = self.length(r) |
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|
504 |
bins.append(decompress(data[last:last + s])) |
0
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|
505 |
last = last + s |
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|
506 |
|
71
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diff
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|
507 |
text = mdiff.patches(text, bins) |
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diff
changeset
|
508 |
|
26 | 509 |
if node != hash(text, p1, p2): |
1214 | 510 |
raise RevlogError("integrity check failed on %s:%d" |
98 | 511 |
% (self.datafile, rev)) |
0
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|
512 |
|
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|
513 |
self.cache = (node, rev, text) |
515 | 514 |
return text |
0
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|
515 |
|
644 | 516 |
def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
1083 | 517 |
"""add a revision to the log |
518 |
||
519 |
text - the revision data to add |
|
520 |
transaction - the transaction object used for rollback |
|
521 |
link - the linkrev data to add |
|
522 |
p1, p2 - the parent nodeids of the revision |
|
523 |
d - an optional precomputed delta |
|
524 |
""" |
|
0
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|
525 |
if text is None: text = "" |
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|
526 |
if p1 is None: p1 = self.tip() |
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|
527 |
if p2 is None: p2 = nullid |
9117c6561b0b
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parents:
diff
changeset
|
528 |
|
9117c6561b0b
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parents:
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|
529 |
node = hash(text, p1, p2) |
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|
530 |
|
301 | 531 |
if node in self.nodemap: |
532 |
return node |
|
533 |
||
0
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|
534 |
n = self.count() |
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|
535 |
t = n - 1 |
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|
536 |
|
9117c6561b0b
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|
537 |
if n: |
64 | 538 |
base = self.base(t) |
539 |
start = self.start(base) |
|
0
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parents:
diff
changeset
|
540 |
end = self.end(t) |
644 | 541 |
if not d: |
542 |
prev = self.revision(self.tip()) |
|
543 |
d = self.diff(prev, text) |
|
98 | 544 |
data = compress(d) |
64 | 545 |
dist = end - start + len(data) |
0
9117c6561b0b
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|
546 |
|
9117c6561b0b
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parents:
diff
changeset
|
547 |
# full versions are inserted when the needed deltas |
9117c6561b0b
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mpm@selenic.com
parents:
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changeset
|
548 |
# become comparable to the uncompressed text |
64 | 549 |
if not n or dist > len(text) * 2: |
0
9117c6561b0b
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parents:
diff
changeset
|
550 |
data = compress(text) |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
551 |
base = n |
9117c6561b0b
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parents:
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changeset
|
552 |
else: |
9117c6561b0b
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parents:
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|
553 |
base = self.base(t) |
9117c6561b0b
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changeset
|
554 |
|
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
555 |
offset = 0 |
9117c6561b0b
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parents:
diff
changeset
|
556 |
if t >= 0: |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
557 |
offset = self.end(t) |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
558 |
|
9117c6561b0b
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parents:
diff
changeset
|
559 |
e = (offset, len(data), base, link, p1, p2, node) |
515 | 560 |
|
0
9117c6561b0b
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parents:
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|
561 |
self.index.append(e) |
9117c6561b0b
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mpm@selenic.com
parents:
diff
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|
562 |
self.nodemap[node] = n |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
563 |
entry = struct.pack(indexformat, *e) |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
564 |
|
26 | 565 |
transaction.add(self.datafile, e[0]) |
0
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
566 |
self.opener(self.datafile, "a").write(data) |
41 | 567 |
transaction.add(self.indexfile, n * len(entry)) |
0
9117c6561b0b
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parents:
diff
changeset
|
568 |
self.opener(self.indexfile, "a").write(entry) |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
569 |
|
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
570 |
self.cache = (node, n, text) |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
571 |
return node |
9117c6561b0b
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mpm@selenic.com
parents:
diff
changeset
|
572 |
|
9117c6561b0b
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mpm@selenic.com
parents:
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changeset
|
573 |
def ancestor(self, a, b): |
1083 | 574 |
"""calculate the least common ancestor of nodes a and b""" |
147 | 575 |
# calculate the distance of every node from root |
576 |
dist = {nullid: 0} |
|
577 |
for i in xrange(self.count()): |
|
578 |
n = self.node(i) |
|
579 |
p1, p2 = self.parents(n) |
|
580 |
dist[n] = max(dist[p1], dist[p2]) + 1 |
|
515 | 581 |
|
147 | 582 |
# traverse ancestors in order of decreasing distance from root |
583 |
def ancestors(node): |
|
584 |
# we store negative distances because heap returns smallest member |
|
585 |
h = [(-dist[node], node)] |
|
586 |
seen = {} |
|
587 |
earliest = self.count() |
|
588 |
while h: |
|
589 |
d, n = heapq.heappop(h) |
|
590 |
if n not in seen: |
|
591 |
seen[n] = 1 |
|
381 | 592 |
r = self.rev(n) |
1351
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
593 |
yield (-d, n) |
147 | 594 |
for p in self.parents(n): |
595 |
heapq.heappush(h, (-dist[p], p)) |
|
45
f2b2d5daec30
Fix recursion depth trouble with ancestor algorithm
mpm@selenic.com
parents:
41
diff
changeset
|
596 |
|
1351
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
597 |
def generations(node): |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
598 |
sg, s = None, {} |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
599 |
for g,n in ancestors(node): |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
600 |
if g != sg: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
601 |
if sg: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
602 |
yield sg, s |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
603 |
sg, s = g, {n:1} |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
604 |
else: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
605 |
s[n] = 1 |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
606 |
yield sg, s |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
607 |
|
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
608 |
x = generations(a) |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
609 |
y = generations(b) |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
610 |
gx = x.next() |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
611 |
gy = y.next() |
45
f2b2d5daec30
Fix recursion depth trouble with ancestor algorithm
mpm@selenic.com
parents:
41
diff
changeset
|
612 |
|
147 | 613 |
# increment each ancestor list until it is closer to root than |
614 |
# the other, or they match |
|
615 |
while 1: |
|
1351
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
616 |
#print "ancestor gen %s %s" % (gx[0], gy[0]) |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
617 |
if gx[0] == gy[0]: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
618 |
# find the intersection |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
619 |
i = [ n for n in gx[1] if n in gy[1] ] |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
620 |
if i: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
621 |
return i[0] |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
622 |
else: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
623 |
#print "next" |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
624 |
gy = y.next() |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
625 |
gx = x.next() |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
626 |
elif gx[0] < gy[0]: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
627 |
#print "next y" |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
628 |
gy = y.next() |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
629 |
else: |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
630 |
#print "next x" |
0e2be889ccd7
Repair ancestor logic, fix up test cases
Matt Mackall <mpm@selenic.com>
parents:
1325
diff
changeset
|
631 |
gx = x.next() |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
632 |
|
1458
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
633 |
def group(self, nodelist, lookup, infocollect = None): |
1083 | 634 |
"""calculate a delta group |
46 | 635 |
|
1083 | 636 |
Given a list of changeset revs, return a set of deltas and |
637 |
metadata corresponding to nodes. the first delta is |
|
638 |
parent(nodes[0]) -> nodes[0] the receiver is guaranteed to |
|
639 |
have this parent as it has all history before these |
|
640 |
changesets. parent is parent[0] |
|
641 |
""" |
|
1458
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
642 |
revs = [self.rev(n) for n in nodelist] |
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
643 |
needed = dict.fromkeys(revs, 1) |
46 | 644 |
|
645 |
# if we don't have any revisions touched by these changesets, bail |
|
192 | 646 |
if not revs: |
647 |
yield struct.pack(">l", 0) |
|
648 |
return |
|
46 | 649 |
|
650 |
# add the parent of the first rev |
|
651 |
p = self.parents(self.node(revs[0]))[0] |
|
652 |
revs.insert(0, self.rev(p)) |
|
653 |
||
654 |
# for each delta that isn't contiguous in the log, we need to |
|
655 |
# reconstruct the base, reconstruct the result, and then |
|
656 |
# calculate the delta. We also need to do this where we've |
|
657 |
# stored a full version and not a delta |
|
658 |
for i in xrange(0, len(revs) - 1): |
|
659 |
a, b = revs[i], revs[i + 1] |
|
660 |
if a + 1 != b or self.base(b) == b: |
|
661 |
for j in xrange(self.base(a), a + 1): |
|
662 |
needed[j] = 1 |
|
663 |
for j in xrange(self.base(b), b + 1): |
|
664 |
needed[j] = 1 |
|
665 |
||
666 |
# calculate spans to retrieve from datafile |
|
667 |
needed = needed.keys() |
|
668 |
needed.sort() |
|
669 |
spans = [] |
|
192 | 670 |
oo = -1 |
671 |
ol = 0 |
|
46 | 672 |
for n in needed: |
673 |
if n < 0: continue |
|
674 |
o = self.start(n) |
|
675 |
l = self.length(n) |
|
192 | 676 |
if oo + ol == o: # can we merge with the previous? |
677 |
nl = spans[-1][2] |
|
678 |
nl.append((n, l)) |
|
679 |
ol += l |
|
680 |
spans[-1] = (oo, ol, nl) |
|
46 | 681 |
else: |
192 | 682 |
oo = o |
683 |
ol = l |
|
684 |
spans.append((oo, ol, [(n, l)])) |
|
46 | 685 |
|
686 |
# read spans in, divide up chunks |
|
687 |
chunks = {} |
|
192 | 688 |
for span in spans: |
46 | 689 |
# we reopen the file for each span to make http happy for now |
690 |
f = self.opener(self.datafile) |
|
691 |
f.seek(span[0]) |
|
692 |
data = f.read(span[1]) |
|
693 |
||
694 |
# divide up the span |
|
695 |
pos = 0 |
|
696 |
for r, l in span[2]: |
|
192 | 697 |
chunks[r] = decompress(data[pos: pos + l]) |
46 | 698 |
pos += l |
699 |
||
700 |
# helper to reconstruct intermediate versions |
|
701 |
def construct(text, base, rev): |
|
192 | 702 |
bins = [chunks[r] for r in xrange(base + 1, rev + 1)] |
71
47c9a869adee
Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents:
67
diff
changeset
|
703 |
return mdiff.patches(text, bins) |
46 | 704 |
|
705 |
# build deltas |
|
706 |
deltas = [] |
|
71
47c9a869adee
Add mdiff.patches to speed up applying thousands of patches to the manifest
mpm@selenic.com
parents:
67
diff
changeset
|
707 |
for d in xrange(0, len(revs) - 1): |
46 | 708 |
a, b = revs[d], revs[d + 1] |
709 |
n = self.node(b) |
|
192 | 710 |
|
1458
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
711 |
if infocollect is not None: |
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
712 |
infocollect(n) |
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
713 |
|
192 | 714 |
# do we need to construct a new delta? |
46 | 715 |
if a + 1 != b or self.base(b) == b: |
716 |
if a >= 0: |
|
717 |
base = self.base(a) |
|
192 | 718 |
ta = chunks[self.base(a)] |
46 | 719 |
ta = construct(ta, base, a) |
720 |
else: |
|
721 |
ta = "" |
|
515 | 722 |
|
46 | 723 |
base = self.base(b) |
724 |
if a > base: |
|
725 |
base = a |
|
726 |
tb = ta |
|
727 |
else: |
|
192 | 728 |
tb = chunks[self.base(b)] |
46 | 729 |
tb = construct(tb, base, b) |
730 |
d = self.diff(ta, tb) |
|
731 |
else: |
|
192 | 732 |
d = chunks[b] |
46 | 733 |
|
734 |
p = self.parents(n) |
|
1458
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
changeset
|
735 |
meta = n + p[0] + p[1] + lookup(n) |
46 | 736 |
l = struct.pack(">l", len(meta) + len(d) + 4) |
192 | 737 |
yield l |
738 |
yield meta |
|
739 |
yield d |
|
46 | 740 |
|
192 | 741 |
yield struct.pack(">l", 0) |
742 |
||
1062 | 743 |
def addgroup(self, revs, linkmapper, transaction, unique=0): |
1083 | 744 |
""" |
745 |
add a delta group |
|
46 | 746 |
|
1083 | 747 |
given a set of deltas, add them to the revision log. the |
748 |
first delta is against its parent, which should be in our |
|
749 |
log, the rest are against the previous delta. |
|
750 |
""" |
|
751 |
||
752 |
#track the base of the current delta log |
|
46 | 753 |
r = self.count() |
754 |
t = r - 1 |
|
192 | 755 |
node = nullid |
515 | 756 |
|
655 | 757 |
base = prev = -1 |
653
94cdd02792b5
Fix corruption resulting from skipping parts of a revision group
Matt Mackall <mpm@selenic.com>
parents:
651
diff
changeset
|
758 |
start = end = measure = 0 |
46 | 759 |
if r: |
760 |
start = self.start(self.base(t)) |
|
761 |
end = self.end(t) |
|
762 |
measure = self.length(self.base(t)) |
|
763 |
base = self.base(t) |
|
764 |
prev = self.tip() |
|
765 |
||
766 |
transaction.add(self.datafile, end) |
|
767 |
transaction.add(self.indexfile, r * struct.calcsize(indexformat)) |
|
768 |
dfh = self.opener(self.datafile, "a") |
|
769 |
ifh = self.opener(self.indexfile, "a") |
|
770 |
||
771 |
# loop through our set of deltas |
|
192 | 772 |
chain = None |
773 |
for chunk in revs: |
|
774 |
node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) |
|
94 | 775 |
link = linkmapper(cs) |
77 | 776 |
if node in self.nodemap: |
224
ccbcc4d76f81
fix bad assumption about uniqueness of file versions
mpm@selenic.com
parents:
221
diff
changeset
|
777 |
# this can happen if two branches make the same change |
1218
cde6818e082a
Add preliminary support for the bundle and unbundle commands
mpm@selenic.com
parents:
1214
diff
changeset
|
778 |
# if unique: |
cde6818e082a
Add preliminary support for the bundle and unbundle commands
mpm@selenic.com
parents:
1214
diff
changeset
|
779 |
# raise RevlogError("already have %s" % hex(node[:4])) |
653
94cdd02792b5
Fix corruption resulting from skipping parts of a revision group
Matt Mackall <mpm@selenic.com>
parents:
651
diff
changeset
|
780 |
chain = node |
224
ccbcc4d76f81
fix bad assumption about uniqueness of file versions
mpm@selenic.com
parents:
221
diff
changeset
|
781 |
continue |
192 | 782 |
delta = chunk[80:] |
783 |
||
784 |
if not chain: |
|
785 |
# retrieve the parent revision of the delta chain |
|
786 |
chain = p1 |
|
787 |
if not chain in self.nodemap: |
|
1073
7b35a980b982
[PATCH] raise exceptions with Exception subclasses
Bart Trojanowski <bart@jukie.net>
parents:
1062
diff
changeset
|
788 |
raise RevlogError("unknown base %s" % short(chain[:4])) |
46 | 789 |
|
790 |
# full versions are inserted when the needed deltas become |
|
791 |
# comparable to the uncompressed text or when the previous |
|
792 |
# version is not the one we have a delta against. We use |
|
793 |
# the size of the previous full rev as a proxy for the |
|
794 |
# current size. |
|
795 |
||
796 |
if chain == prev: |
|
797 |
cdelta = compress(delta) |
|
798 |
||
799 |
if chain != prev or (end - start + len(cdelta)) > measure * 2: |
|
800 |
# flush our writes here so we can read it in revision |
|
801 |
dfh.flush() |
|
802 |
ifh.flush() |
|
65
d40cc5aacc31
Fix up a bunch of bugs in the new merge code
mpm@selenic.com
parents:
64
diff
changeset
|
803 |
text = self.revision(chain) |
73 | 804 |
text = self.patches(text, [delta]) |
46 | 805 |
chk = self.addrevision(text, transaction, link, p1, p2) |
806 |
if chk != node: |
|
1073
7b35a980b982
[PATCH] raise exceptions with Exception subclasses
Bart Trojanowski <bart@jukie.net>
parents:
1062
diff
changeset
|
807 |
raise RevlogError("consistency error adding group") |
46 | 808 |
measure = len(text) |
809 |
else: |
|
810 |
e = (end, len(cdelta), self.base(t), link, p1, p2, node) |
|
811 |
self.index.append(e) |
|
812 |
self.nodemap[node] = r |
|
813 |
dfh.write(cdelta) |
|
814 |
ifh.write(struct.pack(indexformat, *e)) |
|
815 |
||
65
d40cc5aacc31
Fix up a bunch of bugs in the new merge code
mpm@selenic.com
parents:
64
diff
changeset
|
816 |
t, r, chain, prev = r, r + 1, node, node |
46 | 817 |
start = self.start(self.base(t)) |
818 |
end = self.end(t) |
|
819 |
||
820 |
dfh.close() |
|
821 |
ifh.close() |
|
822 |
return node |