Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/revlog.py @ 4661:a7e9b6b1adeb
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author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Thu, 21 Jun 2007 10:00:59 +0200 |
parents | 63b9d2deed48 |
children | 62c56d8f368b |
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1083 | 1 """ |
2 revlog.py - storage back-end for mercurial | |
3 | |
4 This provides efficient delta storage with O(1) retrieve and append | |
5 and O(changes) merge between branches | |
6 | |
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7 Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
1083 | 8 |
9 This software may be used and distributed according to the terms | |
10 of the GNU General Public License, incorporated herein by reference. | |
11 """ | |
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12 |
1089 | 13 from node import * |
3893 | 14 from i18n import _ |
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15 import binascii, changegroup, errno, ancestor, mdiff, os |
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16 import sha, struct, util, zlib |
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17 |
2072 | 18 # revlog version strings |
19 REVLOGV0 = 0 | |
20 REVLOGNG = 1 | |
21 | |
2073 | 22 # revlog flags |
23 REVLOGNGINLINEDATA = (1 << 16) | |
2222
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24 REVLOG_DEFAULT_FLAGS = REVLOGNGINLINEDATA |
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25 |
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26 REVLOG_DEFAULT_FORMAT = REVLOGNG |
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27 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS |
2073 | 28 |
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29 def hash(text, p1, p2): |
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30 """generate a hash from the given text and its parent hashes |
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31 |
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32 This hash combines both the current file contents and its history |
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33 in a manner that makes it easy to distinguish nodes with the same |
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34 content in the revision graph. |
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35 """ |
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36 l = [p1, p2] |
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37 l.sort() |
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38 s = sha.new(l[0]) |
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39 s.update(l[1]) |
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40 s.update(text) |
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41 return s.digest() |
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42 |
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43 def compress(text): |
1083 | 44 """ generate a possibly-compressed representation of text """ |
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45 if not text: return ("", text) |
112 | 46 if len(text) < 44: |
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47 if text[0] == '\0': return ("", text) |
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48 return ('u', text) |
112 | 49 bin = zlib.compress(text) |
50 if len(bin) > len(text): | |
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51 if text[0] == '\0': return ("", text) |
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52 return ('u', text) |
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53 return ("", bin) |
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54 |
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55 def decompress(bin): |
1083 | 56 """ decompress the given input """ |
112 | 57 if not bin: return bin |
58 t = bin[0] | |
59 if t == '\0': return bin | |
60 if t == 'x': return zlib.decompress(bin) | |
61 if t == 'u': return bin[1:] | |
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62 raise RevlogError(_("unknown compression type %r") % t) |
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63 |
2072 | 64 indexformatv0 = ">4l20s20s20s" |
2079 | 65 v0shaoffset = 56 |
2072 | 66 # index ng: |
67 # 6 bytes offset | |
68 # 2 bytes flags | |
69 # 4 bytes compressed length | |
70 # 4 bytes uncompressed length | |
71 # 4 bytes: base rev | |
72 # 4 bytes link rev | |
73 # 4 bytes parent 1 rev | |
74 # 4 bytes parent 2 rev | |
75 # 32 bytes: nodeid | |
76 indexformatng = ">Qiiiiii20s12x" | |
2079 | 77 ngshaoffset = 32 |
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78 versionformat = ">I" |
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79 |
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80 class lazyparser(object): |
1083 | 81 """ |
82 this class avoids the need to parse the entirety of large indices | |
83 """ | |
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84 |
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85 # lazyparser is not safe to use on windows if win32 extensions not |
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86 # available. it keeps file handle open, which make it not possible |
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87 # to break hardlinks on local cloned repos. |
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88 safe_to_use = os.name != 'nt' or (not util.is_win_9x() and |
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89 hasattr(util, 'win32api')) |
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90 |
2079 | 91 def __init__(self, dataf, size, indexformat, shaoffset): |
92 self.dataf = dataf | |
93 self.format = indexformat | |
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94 self.s = struct.calcsize(indexformat) |
2072 | 95 self.indexformat = indexformat |
2079 | 96 self.datasize = size |
97 self.l = size/self.s | |
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98 self.index = [None] * self.l |
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99 self.map = {nullid: nullrev} |
2079 | 100 self.allmap = 0 |
323 | 101 self.all = 0 |
2079 | 102 self.mapfind_count = 0 |
103 self.shaoffset = shaoffset | |
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104 |
2079 | 105 def loadmap(self): |
106 """ | |
107 during a commit, we need to make sure the rev being added is | |
108 not a duplicate. This requires loading the entire index, | |
109 which is fairly slow. loadmap can load up just the node map, | |
110 which takes much less time. | |
111 """ | |
112 if self.allmap: return | |
113 end = self.datasize | |
114 self.allmap = 1 | |
115 cur = 0 | |
116 count = 0 | |
117 blocksize = self.s * 256 | |
118 self.dataf.seek(0) | |
119 while cur < end: | |
120 data = self.dataf.read(blocksize) | |
121 off = 0 | |
122 for x in xrange(256): | |
123 n = data[off + self.shaoffset:off + self.shaoffset + 20] | |
124 self.map[n] = count | |
125 count += 1 | |
126 if count >= self.l: | |
127 break | |
128 off += self.s | |
129 cur += blocksize | |
130 | |
131 def loadblock(self, blockstart, blocksize, data=None): | |
323 | 132 if self.all: return |
2079 | 133 if data is None: |
134 self.dataf.seek(blockstart) | |
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135 if blockstart + blocksize > self.datasize: |
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136 # the revlog may have grown since we've started running, |
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137 # but we don't have space in self.index for more entries. |
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138 # limit blocksize so that we don't get too much data. |
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139 blocksize = max(self.datasize - blockstart, 0) |
2079 | 140 data = self.dataf.read(blocksize) |
141 lend = len(data) / self.s | |
142 i = blockstart / self.s | |
143 off = 0 | |
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144 # lazyindex supports __delitem__ |
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145 if lend > len(self.index) - i: |
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146 lend = len(self.index) - i |
2079 | 147 for x in xrange(lend): |
148 if self.index[i + x] == None: | |
149 b = data[off : off + self.s] | |
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150 self.index[i + x] = b |
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151 n = b[self.shaoffset:self.shaoffset + 20] |
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152 self.map[n] = i + x |
2079 | 153 off += self.s |
154 | |
155 def findnode(self, node): | |
156 """search backwards through the index file for a specific node""" | |
157 if self.allmap: return None | |
158 | |
159 # hg log will cause many many searches for the manifest | |
160 # nodes. After we get called a few times, just load the whole | |
161 # thing. | |
162 if self.mapfind_count > 8: | |
163 self.loadmap() | |
164 if node in self.map: | |
165 return node | |
166 return None | |
167 self.mapfind_count += 1 | |
168 last = self.l - 1 | |
169 while self.index[last] != None: | |
170 if last == 0: | |
171 self.all = 1 | |
172 self.allmap = 1 | |
173 return None | |
174 last -= 1 | |
175 end = (last + 1) * self.s | |
176 blocksize = self.s * 256 | |
177 while end >= 0: | |
178 start = max(end - blocksize, 0) | |
179 self.dataf.seek(start) | |
180 data = self.dataf.read(end - start) | |
181 findend = end - start | |
182 while True: | |
183 # we're searching backwards, so weh have to make sure | |
184 # we don't find a changeset where this node is a parent | |
185 off = data.rfind(node, 0, findend) | |
186 findend = off | |
187 if off >= 0: | |
188 i = off / self.s | |
189 off = i * self.s | |
190 n = data[off + self.shaoffset:off + self.shaoffset + 20] | |
191 if n == node: | |
192 self.map[n] = i + start / self.s | |
193 return node | |
194 else: | |
195 break | |
196 end -= blocksize | |
197 return None | |
198 | |
199 def loadindex(self, i=None, end=None): | |
200 if self.all: return | |
201 all = False | |
202 if i == None: | |
203 blockstart = 0 | |
204 blocksize = (512 / self.s) * self.s | |
205 end = self.datasize | |
206 all = True | |
323 | 207 else: |
2079 | 208 if end: |
209 blockstart = i * self.s | |
210 end = end * self.s | |
211 blocksize = end - blockstart | |
212 else: | |
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213 blockstart = (i & ~63) * self.s |
2079 | 214 blocksize = self.s * 64 |
215 end = blockstart + blocksize | |
216 while blockstart < end: | |
217 self.loadblock(blockstart, blocksize) | |
218 blockstart += blocksize | |
219 if all: self.all = True | |
515 | 220 |
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221 class lazyindex(object): |
1083 | 222 """a lazy version of the index array""" |
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223 def __init__(self, parser): |
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224 self.p = parser |
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225 def __len__(self): |
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226 return len(self.p.index) |
115 | 227 def load(self, pos): |
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228 if pos < 0: |
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229 pos += len(self.p.index) |
2079 | 230 self.p.loadindex(pos) |
115 | 231 return self.p.index[pos] |
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232 def __getitem__(self, pos): |
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233 ret = self.p.index[pos] or self.load(pos) |
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234 if isinstance(ret, str): |
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235 ret = struct.unpack(self.p.indexformat, ret) |
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236 return ret |
2072 | 237 def __setitem__(self, pos, item): |
238 self.p.index[pos] = item | |
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239 def __delitem__(self, pos): |
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240 del self.p.index[pos] |
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241 def append(self, e): |
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242 self.p.index.append(e) |
515 | 243 |
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244 class lazymap(object): |
1083 | 245 """a lazy version of the node map""" |
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246 def __init__(self, parser): |
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247 self.p = parser |
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248 def load(self, key): |
2079 | 249 n = self.p.findnode(key) |
250 if n == None: | |
1214 | 251 raise KeyError(key) |
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252 def __contains__(self, key): |
2079 | 253 if key in self.p.map: |
254 return True | |
255 self.p.loadmap() | |
323 | 256 return key in self.p.map |
97 | 257 def __iter__(self): |
469 | 258 yield nullid |
97 | 259 for i in xrange(self.p.l): |
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260 ret = self.p.index[i] |
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261 if not ret: |
2079 | 262 self.p.loadindex(i) |
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263 ret = self.p.index[i] |
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264 if isinstance(ret, str): |
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265 ret = struct.unpack(self.p.indexformat, ret) |
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266 yield ret[-1] |
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267 def __getitem__(self, key): |
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268 try: |
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269 return self.p.map[key] |
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270 except KeyError: |
86
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271 try: |
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272 self.load(key) |
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273 return self.p.map[key] |
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274 except KeyError: |
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275 raise KeyError("node " + hex(key)) |
76
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276 def __setitem__(self, key, val): |
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277 self.p.map[key] = val |
1535
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278 def __delitem__(self, key): |
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279 del self.p.map[key] |
76
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280 |
1073
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281 class RevlogError(Exception): pass |
3930
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282 class LookupError(RevlogError): pass |
1073
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283 |
1559
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284 class revlog(object): |
1083 | 285 """ |
286 the underlying revision storage object | |
287 | |
288 A revlog consists of two parts, an index and the revision data. | |
289 | |
290 The index is a file with a fixed record size containing | |
291 information on each revision, includings its nodeid (hash), the | |
292 nodeids of its parents, the position and offset of its data within | |
293 the data file, and the revision it's based on. Finally, each entry | |
294 contains a linkrev entry that can serve as a pointer to external | |
295 data. | |
296 | |
297 The revision data itself is a linear collection of data chunks. | |
298 Each chunk represents a revision and is usually represented as a | |
299 delta against the previous chunk. To bound lookup time, runs of | |
300 deltas are limited to about 2 times the length of the original | |
301 version data. This makes retrieval of a version proportional to | |
302 its size, or O(1) relative to the number of revisions. | |
303 | |
304 Both pieces of the revlog are written to in an append-only | |
305 fashion, which means we never need to rewrite a file to insert or | |
306 remove data, and can use some simple techniques to avoid the need | |
307 for locking while reading. | |
308 """ | |
4267
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309 def __init__(self, opener, indexfile): |
1083 | 310 """ |
311 create a revlog object | |
312 | |
313 opener is a function that abstracts the file opening operation | |
314 and can be used to implement COW semantics or the like. | |
315 """ | |
0
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316 self.indexfile = indexfile |
4266
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317 self.datafile = indexfile[:-2] + ".d" |
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318 self.opener = opener |
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319 |
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320 self.indexstat = None |
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321 self.cache = None |
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322 self.chunkcache = None |
4277
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323 self.defversion = REVLOG_DEFAULT_VERSION |
4267
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324 if hasattr(opener, "defversion"): |
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325 self.defversion = opener.defversion |
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326 if self.defversion & REVLOGNG: |
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327 self.defversion |= REVLOGNGINLINEDATA |
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328 self.load() |
116
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329 |
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330 def load(self): |
2072 | 331 v = self.defversion |
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332 try: |
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333 f = self.opener(self.indexfile) |
2079 | 334 i = f.read(4) |
335 f.seek(0) | |
1322
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336 except IOError, inst: |
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337 if inst.errno != errno.ENOENT: |
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338 raise |
76
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339 i = "" |
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340 else: |
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341 try: |
2176
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342 st = util.fstat(f) |
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343 except AttributeError, inst: |
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344 st = None |
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345 else: |
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346 oldst = self.indexstat |
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347 if (oldst and st.st_dev == oldst.st_dev |
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348 and st.st_ino == oldst.st_ino |
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349 and st.st_mtime == oldst.st_mtime |
4495
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350 and st.st_ctime == oldst.st_ctime |
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351 and st.st_size == oldst.st_size): |
1784
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352 return |
2072 | 353 self.indexstat = st |
2138
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Fix revlog-ng interaction with old-http.
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354 if len(i) > 0: |
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355 v = struct.unpack(versionformat, i)[0] |
2073 | 356 flags = v & ~0xFFFF |
357 fmt = v & 0xFFFF | |
2142
8a1e2a9c7013
Replaced 0 with REVLOGV0 where this meaning is used.
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358 if fmt == REVLOGV0: |
2073 | 359 if flags: |
3754
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Improve error message for unknown revlog flags.
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360 raise RevlogError(_("index %s unknown flags %#04x for format v0") |
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|
361 % (self.indexfile, flags >> 16)) |
2073 | 362 elif fmt == REVLOGNG: |
363 if flags & ~REVLOGNGINLINEDATA: | |
3754
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364 raise RevlogError(_("index %s unknown flags %#04x for revlogng") |
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|
365 % (self.indexfile, flags >> 16)) |
2073 | 366 else: |
3744
3a099154b110
Make revlog error slightly less scary
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parents:
3683
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|
367 raise RevlogError(_("index %s unknown format %d") |
3680
69cf255a55a1
Indentation cleanups for 2956948b81f3.
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|
368 % (self.indexfile, fmt)) |
2072 | 369 self.version = v |
2142
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|
370 if v == REVLOGV0: |
2072 | 371 self.indexformat = indexformatv0 |
2079 | 372 shaoffset = v0shaoffset |
2072 | 373 else: |
374 self.indexformat = indexformatng | |
2079 | 375 shaoffset = ngshaoffset |
116
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diff
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|
376 |
2072 | 377 if i: |
2250
45aef5ddcdbe
windows: revlog.lazyparser not always safe to use.
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diff
changeset
|
378 if (lazyparser.safe_to_use and not self.inlinedata() and |
45aef5ddcdbe
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diff
changeset
|
379 st and st.st_size > 10000): |
2072 | 380 # big index, let's parse it on demand |
2079 | 381 parser = lazyparser(f, st.st_size, self.indexformat, shaoffset) |
2072 | 382 self.index = lazyindex(parser) |
383 self.nodemap = lazymap(parser) | |
384 else: | |
2255
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|
385 self.parseindex(f, st) |
2142
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|
386 if self.version != REVLOGV0: |
2072 | 387 e = list(self.index[0]) |
388 type = self.ngtype(e[0]) | |
389 e[0] = self.offset_type(0, type) | |
390 self.index[0] = e | |
116
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diff
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|
391 else: |
3578
3b4e00cba57a
Define and use nullrev (revision of nullid) instead of -1.
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diff
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|
392 self.nodemap = {nullid: nullrev} |
2072 | 393 self.index = [] |
394 | |
395 | |
2255
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|
396 def parseindex(self, fp, st): |
2072 | 397 s = struct.calcsize(self.indexformat) |
398 self.index = [] | |
3578
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399 self.nodemap = {nullid: nullrev} |
2073 | 400 inline = self.inlinedata() |
2072 | 401 n = 0 |
2255
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402 leftover = None |
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403 while True: |
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|
404 if st: |
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405 data = fp.read(65536) |
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|
406 else: |
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|
407 # hack for httprangereader, it doesn't do partial reads well |
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408 data = fp.read() |
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409 if not data: |
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|
410 break |
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411 if n == 0 and self.inlinedata(): |
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|
412 # cache the first chunk |
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|
413 self.chunkcache = (0, data) |
2289
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|
414 if leftover: |
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|
415 data = leftover + data |
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|
416 leftover = None |
2255
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|
417 off = 0 |
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418 l = len(data) |
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419 while off < l: |
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420 if l - off < s: |
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421 leftover = data[off:] |
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|
422 break |
2289
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changeset
|
423 cur = data[off:off + s] |
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changeset
|
424 off += s |
2255
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425 e = struct.unpack(self.indexformat, cur) |
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426 self.index.append(e) |
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427 self.nodemap[e[-1]] = n |
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|
428 n += 1 |
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changeset
|
429 if inline: |
4222
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diff
changeset
|
430 if e[1] < 0: |
90bb1ab53a85
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|
431 break |
2255
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432 off += e[1] |
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433 if off > l: |
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|
434 # some things don't seek well, just read it |
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435 fp.read(off - l) |
4222
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revlog: attempt to gracefully handle some interleaved damage
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parents:
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|
436 break |
2255
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parents:
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|
437 if not st: |
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parents:
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diff
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|
438 break |
2600
c4325f0a9b91
clean up trailing white space.
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parents:
2561
diff
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|
439 |
116
e484cd5ec282
Only use lazy indexing for big indices and avoid the overhead of the
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parents:
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diff
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|
440 |
2072 | 441 def ngoffset(self, q): |
442 if q & 0xFFFF: | |
443 raise RevlogError(_('%s: incompatible revision flag %x') % | |
2141
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Corrected error message for incompatible revision flags.
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parents:
2138
diff
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|
444 (self.indexfile, q)) |
2072 | 445 return long(q >> 16) |
446 | |
447 def ngtype(self, q): | |
448 return int(q & 0xFFFF) | |
116
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diff
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|
449 |
2072 | 450 def offset_type(self, offset, type): |
451 return long(long(offset) << 16 | type) | |
452 | |
2079 | 453 def loadindex(self, start, end): |
454 """load a block of indexes all at once from the lazy parser""" | |
455 if isinstance(self.index, lazyindex): | |
456 self.index.p.loadindex(start, end) | |
457 | |
2072 | 458 def loadindexmap(self): |
459 """loads both the map and the index from the lazy parser""" | |
460 if isinstance(self.index, lazyindex): | |
461 p = self.index.p | |
2079 | 462 p.loadindex() |
463 self.nodemap = p.map | |
464 | |
465 def loadmap(self): | |
466 """loads the map from the lazy parser""" | |
467 if isinstance(self.nodemap, lazymap): | |
468 self.nodemap.p.loadmap() | |
469 self.nodemap = self.nodemap.p.map | |
0
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470 |
2073 | 471 def inlinedata(self): return self.version & REVLOGNGINLINEDATA |
0
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472 def tip(self): return self.node(len(self.index) - 1) |
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473 def count(self): return len(self.index) |
2072 | 474 def node(self, rev): |
3585
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|
475 return rev == nullrev and nullid or self.index[rev][-1] |
1201
59bfbdbc38f6
revlog: raise informative exception if file is missing.
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parents:
1099
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|
476 def rev(self, node): |
59bfbdbc38f6
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|
477 try: |
59bfbdbc38f6
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|
478 return self.nodemap[node] |
59bfbdbc38f6
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parents:
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|
479 except KeyError: |
3930
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parents:
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|
480 raise LookupError(_('%s: no node %s') % (self.indexfile, hex(node))) |
2651
6414ee2eb688
correct the handling of linkrev with nullid
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parents:
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|
481 def linkrev(self, node): |
3578
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482 return (node == nullid) and nullrev or self.index[self.rev(node)][-4] |
2 | 483 def parents(self, node): |
484 if node == nullid: return (nullid, nullid) | |
2072 | 485 r = self.rev(node) |
486 d = self.index[r][-3:-1] | |
2142
8a1e2a9c7013
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487 if self.version == REVLOGV0: |
2072 | 488 return d |
3505
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parents:
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|
489 return (self.node(d[0]), self.node(d[1])) |
2489
568e58eed096
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parents:
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|
490 def parentrevs(self, rev): |
3578
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491 if rev == nullrev: |
3b4e00cba57a
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492 return (nullrev, nullrev) |
2489
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493 d = self.index[rev][-3:-1] |
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494 if self.version == REVLOGV0: |
3505
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495 return (self.rev(d[0]), self.rev(d[1])) |
2489
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496 return d |
2072 | 497 def start(self, rev): |
3585
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498 if rev == nullrev: |
3584
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499 return 0 |
2142
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|
500 if self.version != REVLOGV0: |
2072 | 501 return self.ngoffset(self.index[rev][0]) |
502 return self.index[rev][0] | |
2078
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503 |
2072 | 504 def end(self, rev): return self.start(rev) + self.length(rev) |
0
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505 |
2078
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506 def size(self, rev): |
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507 """return the length of the uncompressed text for a given revision""" |
3582
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508 if rev == nullrev: |
9fb7d3a05882
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509 return 0 |
2078
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parents:
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|
510 l = -1 |
2142
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parents:
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|
511 if self.version != REVLOGV0: |
2078
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512 l = self.index[rev][2] |
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|
513 if l >= 0: |
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|
514 return l |
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|
515 |
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|
516 t = self.revision(self.node(rev)) |
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517 return len(t) |
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518 |
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519 # alternate implementation, The advantage to this code is it |
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520 # will be faster for a single revision. But, the results are not |
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521 # cached, so finding the size of every revision will be slower. |
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522 """ |
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523 if self.cache and self.cache[1] == rev: |
441ea218414e
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524 return len(self.cache[2]) |
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525 |
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526 base = self.base(rev) |
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527 if self.cache and self.cache[1] >= base and self.cache[1] < rev: |
441ea218414e
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diff
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|
528 base = self.cache[1] |
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|
529 text = self.cache[2] |
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530 else: |
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531 text = self.revision(self.node(base)) |
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532 |
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533 l = len(text) |
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534 for x in xrange(base + 1, rev + 1): |
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535 l = mdiff.patchedsize(l, self.chunk(x)) |
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536 return l |
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diff
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|
537 """ |
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diff
changeset
|
538 |
1941
7518823709a2
revlog.py: factorization and fixes for rev < 0 (nullid)
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parents:
1853
diff
changeset
|
539 def length(self, rev): |
3585
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parents:
3584
diff
changeset
|
540 if rev == nullrev: |
1941
7518823709a2
revlog.py: factorization and fixes for rev < 0 (nullid)
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1853
diff
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|
541 return 0 |
7518823709a2
revlog.py: factorization and fixes for rev < 0 (nullid)
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parents:
1853
diff
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|
542 else: |
7518823709a2
revlog.py: factorization and fixes for rev < 0 (nullid)
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parents:
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diff
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|
543 return self.index[rev][1] |
3585
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|
544 def base(self, rev): |
cac2c17bec5a
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diff
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|
545 if (rev == nullrev): |
cac2c17bec5a
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|
546 return nullrev |
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547 else: |
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548 return self.index[rev][-5] |
0
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|
549 |
3633
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3585
diff
changeset
|
550 def reachable(self, node, stop=None): |
3683 | 551 """return a hash of all nodes ancestral to a given node, including |
552 the node itself, stopping when stop is matched""" | |
1074
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553 reachable = {} |
3633
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parents:
3585
diff
changeset
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554 visit = [node] |
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555 reachable[node] = 1 |
1074
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parents:
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556 if stop: |
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557 stopn = self.rev(stop) |
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558 else: |
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559 stopn = 0 |
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560 while visit: |
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561 n = visit.pop(0) |
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562 if n == stop: |
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parents:
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|
563 continue |
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diff
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564 if n == nullid: |
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parents:
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diff
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|
565 continue |
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parents:
1073
diff
changeset
|
566 for p in self.parents(n): |
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Add revlog.reachable to find a graph of ancestors for a given rev
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parents:
1073
diff
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567 if self.rev(p) < stopn: |
55bf5cfde69e
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mason@suse.com
parents:
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568 continue |
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parents:
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diff
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|
569 if p not in reachable: |
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mason@suse.com
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570 reachable[p] = 1 |
55bf5cfde69e
Add revlog.reachable to find a graph of ancestors for a given rev
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parents:
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571 visit.append(p) |
55bf5cfde69e
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parents:
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572 return reachable |
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|
573 |
1457
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
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diff
changeset
|
574 def nodesbetween(self, roots=None, heads=None): |
518da3c3b6ce
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parents:
1351
diff
changeset
|
575 """Return a tuple containing three elements. Elements 1 and 2 contain |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
576 a final list bases and heads after all the unreachable ones have been |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
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diff
changeset
|
577 pruned. Element 0 contains a topologically sorted list of all |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
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parents:
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diff
changeset
|
578 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
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parents:
1351
diff
changeset
|
579 nodes that satisfy these constraints: |
518da3c3b6ce
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parents:
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diff
changeset
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580 1. All nodes must be descended from a node in roots (the nodes on |
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Eric Hopper <hopper@omnifarious.org>
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diff
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581 roots are considered descended from themselves). |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
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parents:
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diff
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582 2. All nodes must also be ancestors of a node in heads (the nodes in |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
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parents:
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diff
changeset
|
583 heads are considered to be their own ancestors). |
518da3c3b6ce
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Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
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584 |
518da3c3b6ce
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Eric Hopper <hopper@omnifarious.org>
parents:
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diff
changeset
|
585 If roots is unspecified, nullid is assumed as the only root. |
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586 If heads is unspecified, it is taken to be the output of the |
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587 heads method (i.e. a list of all nodes in the repository that |
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588 have no children).""" |
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589 nonodes = ([], [], []) |
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590 if roots is not None: |
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591 roots = list(roots) |
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592 if not roots: |
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593 return nonodes |
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594 lowestrev = min([self.rev(n) for n in roots]) |
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595 else: |
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596 roots = [nullid] # Everybody's a descendent of nullid |
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597 lowestrev = nullrev |
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598 if (lowestrev == nullrev) and (heads is None): |
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599 # We want _all_ the nodes! |
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600 return ([self.node(r) for r in xrange(0, self.count())], |
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601 [nullid], list(self.heads())) |
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602 if heads is None: |
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603 # All nodes are ancestors, so the latest ancestor is the last |
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604 # node. |
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605 highestrev = self.count() - 1 |
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606 # Set ancestors to None to signal that every node is an ancestor. |
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607 ancestors = None |
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608 # Set heads to an empty dictionary for later discovery of heads |
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609 heads = {} |
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610 else: |
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611 heads = list(heads) |
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612 if not heads: |
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613 return nonodes |
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614 ancestors = {} |
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615 # Turn heads into a dictionary so we can remove 'fake' heads. |
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616 # Also, later we will be using it to filter out the heads we can't |
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617 # find from roots. |
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618 heads = dict.fromkeys(heads, 0) |
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619 # Start at the top and keep marking parents until we're done. |
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620 nodestotag = heads.keys() |
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621 # Remember where the top was so we can use it as a limit later. |
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622 highestrev = max([self.rev(n) for n in nodestotag]) |
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623 while nodestotag: |
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624 # grab a node to tag |
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625 n = nodestotag.pop() |
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626 # Never tag nullid |
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627 if n == nullid: |
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628 continue |
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629 # A node's revision number represents its place in a |
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630 # topologically sorted list of nodes. |
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631 r = self.rev(n) |
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632 if r >= lowestrev: |
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633 if n not in ancestors: |
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634 # If we are possibly a descendent of one of the roots |
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635 # and we haven't already been marked as an ancestor |
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636 ancestors[n] = 1 # Mark as ancestor |
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637 # Add non-nullid parents to list of nodes to tag. |
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638 nodestotag.extend([p for p in self.parents(n) if |
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639 p != nullid]) |
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640 elif n in heads: # We've seen it before, is it a fake head? |
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641 # So it is, real heads should not be the ancestors of |
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642 # any other heads. |
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643 heads.pop(n) |
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644 if not ancestors: |
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645 return nonodes |
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646 # Now that we have our set of ancestors, we want to remove any |
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647 # roots that are not ancestors. |
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648 |
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649 # If one of the roots was nullid, everything is included anyway. |
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650 if lowestrev > nullrev: |
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651 # But, since we weren't, let's recompute the lowest rev to not |
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652 # include roots that aren't ancestors. |
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653 |
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654 # Filter out roots that aren't ancestors of heads |
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655 roots = [n for n in roots if n in ancestors] |
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656 # Recompute the lowest revision |
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657 if roots: |
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658 lowestrev = min([self.rev(n) for n in roots]) |
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659 else: |
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660 # No more roots? Return empty list |
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661 return nonodes |
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662 else: |
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663 # We are descending from nullid, and don't need to care about |
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664 # any other roots. |
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665 lowestrev = nullrev |
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666 roots = [nullid] |
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667 # Transform our roots list into a 'set' (i.e. a dictionary where the |
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668 # values don't matter. |
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669 descendents = dict.fromkeys(roots, 1) |
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670 # Also, keep the original roots so we can filter out roots that aren't |
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671 # 'real' roots (i.e. are descended from other roots). |
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672 roots = descendents.copy() |
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673 # Our topologically sorted list of output nodes. |
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674 orderedout = [] |
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675 # Don't start at nullid since we don't want nullid in our output list, |
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676 # and if nullid shows up in descedents, empty parents will look like |
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677 # they're descendents. |
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678 for r in xrange(max(lowestrev, 0), highestrev + 1): |
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679 n = self.node(r) |
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680 isdescendent = False |
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681 if lowestrev == nullrev: # Everybody is a descendent of nullid |
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682 isdescendent = True |
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683 elif n in descendents: |
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684 # n is already a descendent |
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685 isdescendent = True |
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686 # This check only needs to be done here because all the roots |
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687 # will start being marked is descendents before the loop. |
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688 if n in roots: |
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689 # If n was a root, check if it's a 'real' root. |
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690 p = tuple(self.parents(n)) |
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691 # If any of its parents are descendents, it's not a root. |
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692 if (p[0] in descendents) or (p[1] in descendents): |
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693 roots.pop(n) |
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694 else: |
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695 p = tuple(self.parents(n)) |
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696 # A node is a descendent if either of its parents are |
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parents:
1351
diff
changeset
|
697 # 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
|
698 # up there, remember?) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
699 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
|
700 descendents[n] = 1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
701 isdescendent = True |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
702 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
|
703 # 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
|
704 orderedout.append(n) |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
705 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
|
706 # 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
|
707 # from roots. |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
708 # 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
|
709 heads[n] = 1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
710 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
|
711 # 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
|
712 # 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
|
713 # 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
|
714 heads[n] = 1 |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
715 # 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
|
716 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
|
717 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
|
718 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
|
719 roots = roots.keys() |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
720 assert orderedout |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
721 assert roots |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
722 assert heads |
518da3c3b6ce
This implements the nodesbetween method, and it removes the newer method
Eric Hopper <hopper@omnifarious.org>
parents:
1351
diff
changeset
|
723 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
|
724 |
3925
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
725 def heads(self, start=None, stop=None): |
1550
ccb9b62de892
add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
1535
diff
changeset
|
726 """return the list of all nodes that have no children |
1551
e793cbc8be00
Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1550
diff
changeset
|
727 |
e793cbc8be00
Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1550
diff
changeset
|
728 if start is specified, only heads that are descendants of |
e793cbc8be00
Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1550
diff
changeset
|
729 start will be returned |
3925
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
730 if stop is specified, it will consider all the revs from stop |
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
731 as if they had no children |
1551
e793cbc8be00
Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1550
diff
changeset
|
732 """ |
e793cbc8be00
Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1550
diff
changeset
|
733 if start is None: |
e793cbc8be00
Fixes to "hg heads -r FOO":
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1550
diff
changeset
|
734 start = nullid |
3925
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
735 if stop is None: |
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
736 stop = [] |
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
737 stoprevs = dict.fromkeys([self.rev(n) for n in stop]) |
1550
ccb9b62de892
add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
1535
diff
changeset
|
738 startrev = self.rev(start) |
2490
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
739 reachable = {startrev: 1} |
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
740 heads = {startrev: 1} |
1083 | 741 |
2490
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
742 parentrevs = self.parentrevs |
1550
ccb9b62de892
add a -r/--rev option to heads to show only heads descendant from rev
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
1535
diff
changeset
|
743 for r in xrange(startrev + 1, self.count()): |
2490
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
744 for p in parentrevs(r): |
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
745 if p in reachable: |
3925
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
746 if r not in stoprevs: |
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
747 reachable[r] = 1 |
2490
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
748 heads[r] = 1 |
3925
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
749 if p in heads and p not in stoprevs: |
2490
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
750 del heads[p] |
3925
27230c29bfec
fix calculation of new heads added during push with -r
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3755
diff
changeset
|
751 |
2490
6ff82ec1f4b8
Change revlog.heads to walk the revision graph using revision numbers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
2489
diff
changeset
|
752 return [self.node(r) for r in heads] |
370 | 753 |
754 def children(self, node): | |
1083 | 755 """find the children of a given node""" |
370 | 756 c = [] |
757 p = self.rev(node) | |
758 for r in range(p + 1, self.count()): | |
3469
fd8f1110562c
fix errors spotted by pychecker
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3465
diff
changeset
|
759 for pr in self.parentrevs(r): |
3465
c6773b7ebee8
revlog.children: use parentrevs instead of parents
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3438
diff
changeset
|
760 if pr == p: |
c6773b7ebee8
revlog.children: use parentrevs instead of parents
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3438
diff
changeset
|
761 c.append(self.node(r)) |
370 | 762 return c |
515 | 763 |
3494
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
764 def _match(self, id): |
3210
7240f9e47144
correctly find the type of 'id' in revlog.lookup
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3153
diff
changeset
|
765 if isinstance(id, (long, int)): |
3152
d01e4cb2f5f2
cleanups in revlog.lookup
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3139
diff
changeset
|
766 # rev |
2650
156fb1feab62
lookup should allow -1 to represent nullid (if passed an int as arg)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
2600
diff
changeset
|
767 return self.node(id) |
3438 | 768 if len(id) == 20: |
769 # possibly a binary node | |
770 # odds of a binary node being all hex in ASCII are 1 in 10**25 | |
771 try: | |
772 node = id | |
773 r = self.rev(node) # quick search the index | |
774 return node | |
3930
01d98d68d697
Add revlog.LookupError exception, and use it instead of RevlogError.
Brendan Cully <brendan@kublai.com>
parents:
3928
diff
changeset
|
775 except LookupError: |
3438 | 776 pass # may be partial hex id |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
777 try: |
3152
d01e4cb2f5f2
cleanups in revlog.lookup
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3139
diff
changeset
|
778 # str(rev) |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
779 rev = int(id) |
469 | 780 if str(rev) != id: raise ValueError |
781 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
|
782 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
|
783 return self.node(rev) |
469 | 784 except (ValueError, OverflowError): |
3152
d01e4cb2f5f2
cleanups in revlog.lookup
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3139
diff
changeset
|
785 pass |
3494
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
786 if len(id) == 40: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
787 try: |
3438 | 788 # a full hex nodeid? |
789 node = bin(id) | |
790 r = self.rev(node) | |
3153
4fe41a9e4591
optimize revlog.lookup when passed hex(node)[:...]
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3152
diff
changeset
|
791 return node |
3494
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
792 except TypeError: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
793 pass |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
794 |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
795 def _partialmatch(self, id): |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
796 if len(id) < 40: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
797 try: |
3438 | 798 # hex(node)[:...] |
799 bin_id = bin(id[:len(id) & ~1]) # grab an even number of digits | |
800 node = None | |
801 for n in self.nodemap: | |
802 if n.startswith(bin_id) and hex(n).startswith(id): | |
803 if node is not None: | |
3930
01d98d68d697
Add revlog.LookupError exception, and use it instead of RevlogError.
Brendan Cully <brendan@kublai.com>
parents:
3928
diff
changeset
|
804 raise LookupError(_("Ambiguous identifier")) |
3438 | 805 node = n |
806 if node is not None: | |
807 return node | |
3494
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
808 except TypeError: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
809 pass |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
810 |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
811 def lookup(self, id): |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
812 """locate a node based on: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
813 - revision number or str(revision number) |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
814 - nodeid or subset of hex nodeid |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
815 """ |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
816 |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
817 n = self._match(id) |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
818 if n is not None: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
819 return n |
dba3cadef789
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parents:
3438
diff
changeset
|
820 n = self._partialmatch(id) |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
821 if n: |
dba3cadef789
Only look up tags and branches as a last resort
Matt Mackall <mpm@selenic.com>
parents:
3438
diff
changeset
|
822 return n |
515 | 823 |
3930
01d98d68d697
Add revlog.LookupError exception, and use it instead of RevlogError.
Brendan Cully <brendan@kublai.com>
parents:
3928
diff
changeset
|
824 raise LookupError(_("No match found")) |
36
da28286bf6b7
Add smart node lookup by substring or by rev number
mpm@selenic.com
parents:
26
diff
changeset
|
825 |
2910
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
826 def cmp(self, node, text): |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
827 """compare text with a given file revision""" |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
828 p1, p2 = self.parents(node) |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
829 return hash(text, p1, p2) != node |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
830 |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
831 def makenode(self, node, text): |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
832 """calculate a file nodeid for text, descended or possibly |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
833 unchanged from node""" |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
834 |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
835 if self.cmp(node, text): |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
836 return hash(text, node, nullid) |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
2858
diff
changeset
|
837 return node |
5df3e5cf16bc
Move cmp bits from filelog to revlog
Matt Mackall <mpm@selenic.com>
parents:
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838 |
0
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parents:
diff
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|
839 def diff(self, a, b): |
1083 | 840 """return a delta between two revisions""" |
0
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parents:
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|
841 return mdiff.textdiff(a, b) |
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842 |
73 | 843 def patches(self, t, pl): |
1083 | 844 """apply a list of patches to a string""" |
73 | 845 return mdiff.patches(t, pl) |
846 | |
2072 | 847 def chunk(self, rev, df=None, cachelen=4096): |
1598
14d1f1868bf6
cleanup of revlog.group when repository is local
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parents:
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diff
changeset
|
848 start, length = self.start(rev), self.length(rev) |
2073 | 849 inline = self.inlinedata() |
850 if inline: | |
851 start += (rev + 1) * struct.calcsize(self.indexformat) | |
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|
852 end = start + length |
2072 | 853 def loadcache(df): |
854 cache_length = max(cachelen, length) # 4k | |
855 if not df: | |
2073 | 856 if inline: |
857 df = self.opener(self.indexfile) | |
858 else: | |
859 df = self.opener(self.datafile) | |
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diff
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|
860 df.seek(start) |
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parents:
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861 self.chunkcache = (start, df.read(cache_length)) |
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parents:
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862 |
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parents:
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diff
changeset
|
863 if not self.chunkcache: |
2072 | 864 loadcache(df) |
1598
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865 |
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cleanup of revlog.group when repository is local
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866 cache_start = self.chunkcache[0] |
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parents:
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867 cache_end = cache_start + len(self.chunkcache[1]) |
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868 if start >= cache_start and end <= cache_end: |
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parents:
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diff
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|
869 # it is cached |
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870 offset = start - cache_start |
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871 else: |
2072 | 872 loadcache(df) |
1598
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873 offset = 0 |
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874 |
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875 #def checkchunk(): |
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876 # df = self.opener(self.datafile) |
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|
877 # df.seek(start) |
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878 # return df.read(length) |
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879 #assert s == checkchunk() |
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880 return decompress(self.chunkcache[1][offset:offset + length]) |
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881 |
119
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mpm@selenic.com
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diff
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882 def delta(self, node): |
1083 | 883 """return or calculate a delta between a node and its predecessor""" |
119
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884 r = self.rev(node) |
1941
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revlog.py: factorization and fixes for rev < 0 (nullid)
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885 return self.revdiff(r - 1, r) |
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886 |
7518823709a2
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887 def revdiff(self, rev1, rev2): |
7518823709a2
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888 """return or calculate a delta between two revisions""" |
7518823709a2
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889 b1 = self.base(rev1) |
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890 b2 = self.base(rev2) |
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891 if b1 == b2 and rev1 + 1 == rev2: |
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892 return self.chunk(rev2) |
119
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893 else: |
1941
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894 return self.diff(self.revision(self.node(rev1)), |
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895 self.revision(self.node(rev2))) |
119
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896 |
0
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897 def revision(self, node): |
1083 | 898 """return an uncompressed revision of a given""" |
36
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899 if node == nullid: return "" |
0
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900 if self.cache and self.cache[0] == node: return self.cache[2] |
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901 |
1083 | 902 # look up what we need to read |
0
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903 text = None |
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904 rev = self.rev(node) |
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905 base = self.base(rev) |
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906 |
2073 | 907 if self.inlinedata(): |
908 # we probably have the whole chunk cached | |
909 df = None | |
910 else: | |
911 df = self.opener(self.datafile) | |
2072 | 912 |
1083 | 913 # do we have useful data cached? |
0
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914 if self.cache and self.cache[1] >= base and self.cache[1] < rev: |
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915 base = self.cache[1] |
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916 text = self.cache[2] |
2079 | 917 self.loadindex(base, rev + 1) |
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918 else: |
2079 | 919 self.loadindex(base, rev + 1) |
2072 | 920 text = self.chunk(base, df=df) |
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921 |
71
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67
diff
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|
922 bins = [] |
64 | 923 for r in xrange(base + 1, rev + 1): |
2072 | 924 bins.append(self.chunk(r, df=df)) |
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925 |
1941
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diff
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|
926 text = self.patches(text, bins) |
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927 |
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928 p1, p2 = self.parents(node) |
26 | 929 if node != hash(text, p1, p2): |
1402
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i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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930 raise RevlogError(_("integrity check failed on %s:%d") |
3680
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Indentation cleanups for 2956948b81f3.
Thomas Arendsen Hein <thomas@intevation.de>
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931 % (self.datafile, rev)) |
0
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932 |
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933 self.cache = (node, rev, text) |
515 | 934 return text |
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935 |
2075
343aeefb553b
Make the appendfile class inline-data index friendly
mason@suse.com
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2073
diff
changeset
|
936 def checkinlinesize(self, tr, fp=None): |
2073 | 937 if not self.inlinedata(): |
938 return | |
2075
343aeefb553b
Make the appendfile class inline-data index friendly
mason@suse.com
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2073
diff
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|
939 if not fp: |
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diff
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|
940 fp = self.opener(self.indexfile, 'r') |
2082
856f0ba200bc
Additional appendfile fixes for interleaved data/index files
mason@suse.com
parents:
2081
diff
changeset
|
941 fp.seek(0, 2) |
2073 | 942 size = fp.tell() |
943 if size < 131072: | |
944 return | |
2084 | 945 trinfo = tr.find(self.indexfile) |
946 if trinfo == None: | |
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parents:
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947 raise RevlogError(_("%s not found in the transaction") |
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
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diff
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|
948 % self.indexfile) |
2084 | 949 |
950 trindex = trinfo[2] | |
951 dataoff = self.start(trindex) | |
952 | |
953 tr.add(self.datafile, dataoff) | |
2073 | 954 df = self.opener(self.datafile, 'w') |
955 calc = struct.calcsize(self.indexformat) | |
956 for r in xrange(self.count()): | |
957 start = self.start(r) + (r + 1) * calc | |
958 length = self.length(r) | |
959 fp.seek(start) | |
960 d = fp.read(length) | |
961 df.write(d) | |
962 fp.close() | |
963 df.close() | |
2076
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Create an atomic opener that does not automatically rename on close
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diff
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964 fp = self.opener(self.indexfile, 'w', atomictemp=True) |
2073 | 965 self.version &= ~(REVLOGNGINLINEDATA) |
966 if self.count(): | |
967 x = self.index[0] | |
968 e = struct.pack(self.indexformat, *x)[4:] | |
969 l = struct.pack(versionformat, self.version) | |
970 fp.write(l) | |
971 fp.write(e) | |
972 | |
973 for i in xrange(1, self.count()): | |
974 x = self.index[i] | |
975 e = struct.pack(self.indexformat, *x) | |
976 fp.write(e) | |
977 | |
2076
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978 # if we don't call rename, the temp file will never replace the |
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979 # real index |
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980 fp.rename() |
2084 | 981 |
982 tr.replace(self.indexfile, trindex * calc) | |
2073 | 983 self.chunkcache = None |
984 | |
644 | 985 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
1083 | 986 """add a revision to the log |
987 | |
988 text - the revision data to add | |
989 transaction - the transaction object used for rollback | |
990 link - the linkrev data to add | |
991 p1, p2 - the parent nodeids of the revision | |
992 d - an optional precomputed delta | |
993 """ | |
3390
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994 if not self.inlinedata(): |
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995 dfh = self.opener(self.datafile, "a") |
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996 else: |
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997 dfh = None |
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998 ifh = self.opener(self.indexfile, "a+") |
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999 return self._addrevision(text, transaction, link, p1, p2, d, ifh, dfh) |
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1000 |
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1001 def _addrevision(self, text, transaction, link, p1, p2, d, ifh, dfh): |
0
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1002 if text is None: text = "" |
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1003 if p1 is None: p1 = self.tip() |
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1004 if p2 is None: p2 = nullid |
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1005 |
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1006 node = hash(text, p1, p2) |
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1007 |
301 | 1008 if node in self.nodemap: |
1009 return node | |
1010 | |
0
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1011 n = self.count() |
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1012 t = n - 1 |
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1013 |
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1014 if n: |
64 | 1015 base = self.base(t) |
1016 start = self.start(base) | |
0
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1017 end = self.end(t) |
644 | 1018 if not d: |
1019 prev = self.revision(self.tip()) | |
3333
9061613c1593
Teach bdiff to support buffer objects
Brendan Cully <brendan@kublai.com>
parents:
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changeset
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1020 d = self.diff(prev, text) |
98 | 1021 data = compress(d) |
1533
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Reduce string duplication in compression code
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1022 l = len(data[1]) + len(data[0]) |
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1023 dist = end - start + l |
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1024 |
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1025 # full versions are inserted when the needed deltas |
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1026 # become comparable to the uncompressed text |
64 | 1027 if not n or dist > len(text) * 2: |
0
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|
1028 data = compress(text) |
1533
3d11f81c9145
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|
1029 l = len(data[1]) + len(data[0]) |
0
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1030 base = n |
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|
1031 else: |
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1032 base = self.base(t) |
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1033 |
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|
1034 offset = 0 |
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1035 if t >= 0: |
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1036 offset = self.end(t) |
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|
1037 |
2142
8a1e2a9c7013
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
2141
diff
changeset
|
1038 if self.version == REVLOGV0: |
2072 | 1039 e = (offset, l, base, link, p1, p2, node) |
1040 else: | |
1041 e = (self.offset_type(offset, 0), l, len(text), | |
1042 base, link, self.rev(p1), self.rev(p2), node) | |
515 | 1043 |
0
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|
1044 self.index.append(e) |
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|
1045 self.nodemap[node] = n |
2072 | 1046 entry = struct.pack(self.indexformat, *e) |
0
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|
1047 |
2073 | 1048 if not self.inlinedata(): |
1049 transaction.add(self.datafile, offset) | |
1050 transaction.add(self.indexfile, n * len(entry)) | |
1051 if data[0]: | |
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make revlog.addgroup pass its file handles to addrevision
Alexis S. L. Carvalho <alexis@cecm.usp.br>
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|
1052 dfh.write(data[0]) |
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make revlog.addgroup pass its file handles to addrevision
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parents:
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1053 dfh.write(data[1]) |
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
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1054 dfh.flush() |
2073 | 1055 else: |
3390
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1056 ifh.seek(0, 2) |
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1057 transaction.add(self.indexfile, ifh.tell(), self.count() - 1) |
2072 | 1058 |
2142
8a1e2a9c7013
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
2141
diff
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|
1059 if len(self.index) == 1 and self.version != REVLOGV0: |
2072 | 1060 l = struct.pack(versionformat, self.version) |
3390
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1061 ifh.write(l) |
2072 | 1062 entry = entry[4:] |
1063 | |
3390
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|
1064 ifh.write(entry) |
0
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|
1065 |
2073 | 1066 if self.inlinedata(): |
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1067 ifh.write(data[0]) |
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1068 ifh.write(data[1]) |
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1069 self.checkinlinesize(transaction, ifh) |
2073 | 1070 |
0
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1071 self.cache = (node, n, text) |
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1072 return node |
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1073 |
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1074 def ancestor(self, a, b): |
1083 | 1075 """calculate the least common ancestor of nodes a and b""" |
2081
416d8b2a75b8
Speedup revlog.ancestors for the linear case
Chris Mason <mason@suse.com>
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1076 |
3139
1fd1cdcc4200
Switch revlog.ancestor to use revisions rather than nodeids
Matt Mackall <mpm@selenic.com>
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|
1077 def parents(rev): |
3578
3b4e00cba57a
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Thomas Arendsen Hein <thomas@intevation.de>
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|
1078 return [p for p in self.parentrevs(rev) if p != nullrev] |
515 | 1079 |
3139
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1080 c = ancestor.ancestor(self.rev(a), self.rev(b), parents) |
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1081 if c is None: |
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|
1082 return nullid |
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1083 |
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|
1084 return self.node(c) |
0
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1085 |
1598
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parents:
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|
1086 def group(self, nodelist, lookup, infocollect=None): |
1083 | 1087 """calculate a delta group |
46 | 1088 |
1083 | 1089 Given a list of changeset revs, return a set of deltas and |
1090 metadata corresponding to nodes. the first delta is | |
1091 parent(nodes[0]) -> nodes[0] the receiver is guaranteed to | |
1092 have this parent as it has all history before these | |
1093 changesets. parent is parent[0] | |
1094 """ | |
1458
1033892bbb87
This changes the revlog.group and re-implements the localrepo.changeroup
Eric Hopper <hopper@omnifarious.org>
parents:
1457
diff
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|
1095 revs = [self.rev(n) for n in nodelist] |
46 | 1096 |
1097 # if we don't have any revisions touched by these changesets, bail | |
192 | 1098 if not revs: |
1981
736b6c96bbbc
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
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|
1099 yield changegroup.closechunk() |
192 | 1100 return |
46 | 1101 |
1102 # add the parent of the first rev | |
1103 p = self.parents(self.node(revs[0]))[0] | |
1104 revs.insert(0, self.rev(p)) | |
1105 | |
1106 # build deltas | |
71
47c9a869adee
Add mdiff.patches to speed up applying thousands of patches to the manifest
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diff
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1107 for d in xrange(0, len(revs) - 1): |
46 | 1108 a, b = revs[d], revs[d + 1] |
1598
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|
1109 nb = self.node(b) |
192 | 1110 |
1458
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parents:
1457
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|
1111 if infocollect is not None: |
1598
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|
1112 infocollect(nb) |
1458
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1457
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|
1113 |
1941
7518823709a2
revlog.py: factorization and fixes for rev < 0 (nullid)
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1853
diff
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|
1114 d = self.revdiff(a, b) |
1598
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1115 p = self.parents(nb) |
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|
1116 meta = nb + p[0] + p[1] + lookup(nb) |
1981
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
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|
1117 yield changegroup.genchunk("%s%s" % (meta, d)) |
46 | 1118 |
1981
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
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|
1119 yield changegroup.closechunk() |
192 | 1120 |
1062 | 1121 def addgroup(self, revs, linkmapper, transaction, unique=0): |
1083 | 1122 """ |
1123 add a delta group | |
46 | 1124 |
1083 | 1125 given a set of deltas, add them to the revision log. the |
1126 first delta is against its parent, which should be in our | |
1127 log, the rest are against the previous delta. | |
1128 """ | |
1129 | |
1130 #track the base of the current delta log | |
46 | 1131 r = self.count() |
1132 t = r - 1 | |
2002
4aab906517c6
Calling revlog.addgroup with an empty changegroup now raises RevlogError.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1981
diff
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|
1133 node = None |
515 | 1134 |
3578
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Thomas Arendsen Hein <thomas@intevation.de>
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|
1135 base = prev = nullrev |
2078
441ea218414e
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2077
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1136 start = end = textlen = 0 |
46 | 1137 if r: |
1138 end = self.end(t) | |
1139 | |
2072 | 1140 ifh = self.opener(self.indexfile, "a+") |
2077
4d0700ae0991
Fix inlined revlogs to seek to eof after opening "a+"
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|
1141 ifh.seek(0, 2) |
2084 | 1142 transaction.add(self.indexfile, ifh.tell(), self.count()) |
2073 | 1143 if self.inlinedata(): |
1144 dfh = None | |
1145 else: | |
1146 transaction.add(self.datafile, end) | |
1147 dfh = self.opener(self.datafile, "a") | |
46 | 1148 |
1149 # loop through our set of deltas | |
192 | 1150 chain = None |
1151 for chunk in revs: | |
1152 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) | |
94 | 1153 link = linkmapper(cs) |
77 | 1154 if node in self.nodemap: |
224
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diff
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1155 # this can happen if two branches make the same change |
1218
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1156 # if unique: |
1402
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i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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1157 # raise RevlogError(_("already have %s") % hex(node[:4])) |
653
94cdd02792b5
Fix corruption resulting from skipping parts of a revision group
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1158 chain = node |
224
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1159 continue |
192 | 1160 delta = chunk[80:] |
1161 | |
1509
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parents:
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1162 for p in (p1, p2): |
46a07392cf28
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|
1163 if not p in self.nodemap: |
3930
01d98d68d697
Add revlog.LookupError exception, and use it instead of RevlogError.
Brendan Cully <brendan@kublai.com>
parents:
3928
diff
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|
1164 raise LookupError(_("unknown parent %s") % short(p)) |
1509
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|
1165 |
192 | 1166 if not chain: |
1167 # retrieve the parent revision of the delta chain | |
1168 chain = p1 | |
1169 if not chain in self.nodemap: | |
3930
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parents:
3928
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|
1170 raise LookupError(_("unknown base %s") % short(chain[:4])) |
46 | 1171 |
1172 # full versions are inserted when the needed deltas become | |
1173 # comparable to the uncompressed text or when the previous | |
1174 # version is not the one we have a delta against. We use | |
1175 # the size of the previous full rev as a proxy for the | |
1176 # current size. | |
1177 | |
1178 if chain == prev: | |
1533
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1509
diff
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|
1179 tempd = compress(delta) |
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diff
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|
1180 cdelta = tempd[0] + tempd[1] |
2078
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parents:
2077
diff
changeset
|
1181 textlen = mdiff.patchedsize(textlen, delta) |
46 | 1182 |
2078
441ea218414e
Fill in the uncompressed size during revlog.addgroup
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parents:
2077
diff
changeset
|
1183 if chain != prev or (end - start + len(cdelta)) > textlen * 2: |
46 | 1184 # flush our writes here so we can read it in revision |
2072 | 1185 if dfh: |
1186 dfh.flush() | |
46 | 1187 ifh.flush() |
65
d40cc5aacc31
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parents:
64
diff
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|
1188 text = self.revision(chain) |
73 | 1189 text = self.patches(text, [delta]) |
3390
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|
1190 chk = self._addrevision(text, transaction, link, p1, p2, None, |
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1191 ifh, dfh) |
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1192 if not dfh and not self.inlinedata(): |
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|
1193 # addrevision switched from inline to conventional |
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1194 # reopen the index |
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1195 dfh = self.opener(self.datafile, "a") |
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|
1196 ifh = self.opener(self.indexfile, "a") |
46 | 1197 if chk != node: |
1402
9d2c2e6b32b5
i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
1400
diff
changeset
|
1198 raise RevlogError(_("consistency error adding group")) |
2078
441ea218414e
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parents:
2077
diff
changeset
|
1199 textlen = len(text) |
46 | 1200 else: |
2142
8a1e2a9c7013
Replaced 0 with REVLOGV0 where this meaning is used.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
2141
diff
changeset
|
1201 if self.version == REVLOGV0: |
2072 | 1202 e = (end, len(cdelta), base, link, p1, p2, node) |
1203 else: | |
2078
441ea218414e
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parents:
2077
diff
changeset
|
1204 e = (self.offset_type(end, 0), len(cdelta), textlen, base, |
2072 | 1205 link, self.rev(p1), self.rev(p2), node) |
46 | 1206 self.index.append(e) |
1207 self.nodemap[node] = r | |
2073 | 1208 if self.inlinedata(): |
1209 ifh.write(struct.pack(self.indexformat, *e)) | |
1210 ifh.write(cdelta) | |
2075
343aeefb553b
Make the appendfile class inline-data index friendly
mason@suse.com
parents:
2073
diff
changeset
|
1211 self.checkinlinesize(transaction, ifh) |
2073 | 1212 if not self.inlinedata(): |
1213 dfh = self.opener(self.datafile, "a") | |
1214 ifh = self.opener(self.indexfile, "a") | |
1215 else: | |
1216 dfh.write(cdelta) | |
1217 ifh.write(struct.pack(self.indexformat, *e)) | |
46 | 1218 |
65
d40cc5aacc31
Fix up a bunch of bugs in the new merge code
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64
diff
changeset
|
1219 t, r, chain, prev = r, r + 1, node, node |
1749
d457fec76ab0
fix warnings from pychecker (unused variables and shadowing)
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parents:
1711
diff
changeset
|
1220 base = self.base(t) |
d457fec76ab0
fix warnings from pychecker (unused variables and shadowing)
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1711
diff
changeset
|
1221 start = self.start(base) |
46 | 1222 end = self.end(t) |
1223 | |
1224 return node | |
1493
1a216cb4ee64
verify: add check for mismatch of index and data length
Matt Mackall <mpm@selenic.com>
parents:
1469
diff
changeset
|
1225 |
1535
7ae0ce7a3dc4
Add revlog.strip to truncate away revisions.
mason@suse.com
parents:
1533
diff
changeset
|
1226 def strip(self, rev, minlink): |
7ae0ce7a3dc4
Add revlog.strip to truncate away revisions.
mason@suse.com
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1533
diff
changeset
|
1227 if self.count() == 0 or rev >= self.count(): |
7ae0ce7a3dc4
Add revlog.strip to truncate away revisions.
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1533
diff
changeset
|
1228 return |
7ae0ce7a3dc4
Add revlog.strip to truncate away revisions.
mason@suse.com
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1533
diff
changeset
|
1229 |
2072 | 1230 if isinstance(self.index, lazyindex): |
1231 self.loadindexmap() | |
1232 | |
1535
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1233 # When stripping away a revision, we need to make sure it |
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1234 # does not actually belong to an older changeset. |
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1235 # The minlink parameter defines the oldest revision |
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1236 # we're allowed to strip away. |
2072 | 1237 while minlink > self.index[rev][-4]: |
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1238 rev += 1 |
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1239 if rev >= self.count(): |
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1240 return |
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1241 |
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1242 # first truncate the files on disk |
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1243 end = self.start(rev) |
2073 | 1244 if not self.inlinedata(): |
1245 df = self.opener(self.datafile, "a") | |
1246 df.truncate(end) | |
1247 end = rev * struct.calcsize(self.indexformat) | |
1248 else: | |
1249 end += rev * struct.calcsize(self.indexformat) | |
2072 | 1250 |
1251 indexf = self.opener(self.indexfile, "a") | |
1252 indexf.truncate(end) | |
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1253 |
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1254 # then reset internal state in memory to forget those revisions |
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1255 self.cache = None |
1711 | 1256 self.chunkcache = None |
2072 | 1257 for x in xrange(rev, self.count()): |
1258 del self.nodemap[self.node(x)] | |
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1259 |
2072 | 1260 del self.index[rev:] |
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1261 |
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1262 def checksize(self): |
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1263 expected = 0 |
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1264 if self.count(): |
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1265 expected = self.end(self.count() - 1) |
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1266 |
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1267 try: |
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1268 f = self.opener(self.datafile) |
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1269 f.seek(0, 2) |
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1270 actual = f.tell() |
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1271 dd = actual - expected |
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1272 except IOError, inst: |
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1273 if inst.errno != errno.ENOENT: |
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1274 raise |
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1275 dd = 0 |
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1276 |
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1277 try: |
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1278 f = self.opener(self.indexfile) |
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1279 f.seek(0, 2) |
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1280 actual = f.tell() |
2072 | 1281 s = struct.calcsize(self.indexformat) |
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1282 i = actual / s |
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1283 di = actual - (i * s) |
2073 | 1284 if self.inlinedata(): |
1285 databytes = 0 | |
1286 for r in xrange(self.count()): | |
1287 databytes += self.length(r) | |
1288 dd = 0 | |
1289 di = actual - self.count() * s - databytes | |
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1290 except IOError, inst: |
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1291 if inst.errno != errno.ENOENT: |
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1292 raise |
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1293 di = 0 |
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1294 |
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1295 return (dd, di) |
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1296 |
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1297 |