Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/manifest.py @ 3470:2ed139c3b328
hgweb: add revision numbers to changeset parent/child links
author | Brendan Cully <brendan@kublai.com> |
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date | Thu, 19 Oct 2006 15:58:43 -0700 |
parents | 53e843840349 |
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1089 | 1 # manifest.py - manifest revision class for mercurial |
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2 # |
2858 | 3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms |
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6 # of the GNU General Public License, incorporated herein by reference. |
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7 |
262 | 8 from revlog import * |
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9 from i18n import gettext as _ |
262 | 10 from demandload import * |
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11 demandload(globals(), "array bisect struct") |
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12 demandload(globals(), "mdiff") |
79 | 13 |
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14 class manifestdict(dict): |
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15 def __init__(self, mapping=None, flags=None): |
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16 if mapping is None: mapping = {} |
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17 if flags is None: flags = {} |
2843 | 18 dict.__init__(self, mapping) |
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19 self._flags = flags |
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20 def flags(self, f): |
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21 return self._flags.get(f, "") |
2843 | 22 def execf(self, f): |
23 "test for executable in manifest flags" | |
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24 return "x" in self.flags(f) |
2843 | 25 def linkf(self, f): |
26 "test for symlink in manifest flags" | |
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27 return "l" in self.flags(f) |
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28 def rawset(self, f, entry): |
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29 self[f] = bin(entry[:40]) |
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30 fl = entry[40:-1] |
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31 if fl: self._flags[f] = fl |
2843 | 32 def set(self, f, execf=False, linkf=False): |
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33 if linkf: self._flags[f] = "l" |
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34 elif execf: self._flags[f] = "x" |
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35 else: self._flags[f] = "" |
2843 | 36 def copy(self): |
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37 return manifestdict(dict.copy(self), dict.copy(self._flags)) |
2843 | 38 |
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39 class manifest(revlog): |
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40 def __init__(self, opener, defversion=REVLOGV0): |
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41 self.mapcache = None |
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42 self.listcache = None |
2072 | 43 revlog.__init__(self, opener, "00manifest.i", "00manifest.d", |
44 defversion) | |
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45 |
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46 def parselines(self, lines): |
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47 for l in lines.splitlines(1): |
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48 yield l.split('\0') |
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49 |
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50 def readdelta(self, node): |
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51 delta = mdiff.patchtext(self.delta(node)) |
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52 deltamap = manifestdict() |
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53 for f, n in self.parselines(delta): |
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54 deltamap.rawset(f, n) |
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55 return deltamap |
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56 |
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57 def read(self, node): |
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58 if node == nullid: return manifestdict() # don't upset local cache |
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59 if self.mapcache and self.mapcache[0] == node: |
561 | 60 return self.mapcache[1] |
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61 text = self.revision(node) |
1534 | 62 self.listcache = array.array('c', text) |
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63 mapping = manifestdict() |
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64 for f, n in self.parselines(text): |
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65 mapping.rawset(f, n) |
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66 self.mapcache = (node, mapping) |
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67 return mapping |
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68 |
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69 def _search(self, m, s, lo=0, hi=None): |
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70 '''return a tuple (start, end) that says where to find s within m. |
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71 |
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72 If the string is found m[start:end] are the line containing |
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73 that string. If start == end the string was not found and |
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74 they indicate the proper sorted insertion point. This was |
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75 taken from bisect_left, and modified to find line start/end as |
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76 it goes along. |
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77 |
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78 m should be a buffer or a string |
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79 s is a string''' |
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80 def advance(i, c): |
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81 while i < lenm and m[i] != c: |
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82 i += 1 |
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83 return i |
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84 lenm = len(m) |
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85 if not hi: |
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86 hi = lenm |
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87 while lo < hi: |
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88 mid = (lo + hi) // 2 |
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89 start = mid |
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90 while start > 0 and m[start-1] != '\n': |
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91 start -= 1 |
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92 end = advance(start, '\0') |
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93 if m[start:end] < s: |
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94 # we know that after the null there are 40 bytes of sha1 |
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95 # this translates to the bisect lo = mid + 1 |
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96 lo = advance(end + 40, '\n') + 1 |
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97 else: |
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98 # this translates to the bisect hi = mid |
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99 hi = start |
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100 end = advance(lo, '\0') |
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101 found = m[lo:end] |
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102 if cmp(s, found) == 0: |
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103 # we know that after the null there are 40 bytes of sha1 |
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104 end = advance(end + 40, '\n') |
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105 return (lo, end+1) |
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106 else: |
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107 return (lo, lo) |
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108 |
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109 def find(self, node, f): |
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110 '''look up entry for a single file efficiently. |
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111 return (node, flag) pair if found, (None, None) if not.''' |
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112 if self.mapcache and node == self.mapcache[0]: |
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113 return self.mapcache[1].get(f), self.mapcache[1].flags(f) |
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114 text = self.revision(node) |
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115 start, end = self._search(text, f) |
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116 if start == end: |
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117 return None, None |
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118 l = text[start:end] |
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119 f, n = l.split('\0') |
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120 return bin(n[:40]), n[40:-1] == 'x' |
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121 |
2853 | 122 def add(self, map, transaction, link, p1=None, p2=None, |
741 | 123 changed=None): |
644 | 124 # apply the changes collected during the bisect loop to our addlist |
1534 | 125 # return a delta suitable for addrevision |
126 def addlistdelta(addlist, x): | |
127 # start from the bottom up | |
644 | 128 # so changes to the offsets don't mess things up. |
1534 | 129 i = len(x) |
644 | 130 while i > 0: |
131 i -= 1 | |
1534 | 132 start = x[i][0] |
133 end = x[i][1] | |
134 if x[i][2]: | |
135 addlist[start:end] = array.array('c', x[i][2]) | |
644 | 136 else: |
137 del addlist[start:end] | |
1534 | 138 return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] \ |
139 for d in x ]) | |
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140 |
644 | 141 # if we're using the listcache, make sure it is valid and |
142 # parented by the same node we're diffing against | |
741 | 143 if not changed or not self.listcache or not p1 or \ |
144 self.mapcache[0] != p1: | |
644 | 145 files = map.keys() |
146 files.sort() | |
147 | |
1651 | 148 # if this is changed to support newlines in filenames, |
149 # be sure to check the templates/ dir again (especially *-raw.tmpl) | |
2853 | 150 text = ["%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) for f in files] |
1534 | 151 self.listcache = array.array('c', "".join(text)) |
644 | 152 cachedelta = None |
153 else: | |
1534 | 154 addlist = self.listcache |
644 | 155 |
156 # combine the changed lists into one list for sorting | |
157 work = [[x, 0] for x in changed[0]] | |
158 work[len(work):] = [[x, 1] for x in changed[1]] | |
159 work.sort() | |
160 | |
161 delta = [] | |
1534 | 162 dstart = None |
163 dend = None | |
164 dline = [""] | |
165 start = 0 | |
166 # zero copy representation of addlist as a buffer | |
167 addbuf = buffer(addlist) | |
644 | 168 |
1534 | 169 # start with a readonly loop that finds the offset of |
170 # each line and creates the deltas | |
644 | 171 for w in work: |
172 f = w[0] | |
741 | 173 # bs will either be the index of the item or the insert point |
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dbdce3b99988
fix parsing of tags. make parse errors useful. add new tag tests.
Vadim Gelfer <vadim.gelfer@gmail.com>
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174 start, end = self._search(addbuf, f, start) |
644 | 175 if w[1] == 0: |
2853 | 176 l = "%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) |
644 | 177 else: |
1534 | 178 l = "" |
179 if start == end and w[1] == 1: | |
180 # item we want to delete was not found, error out | |
181 raise AssertionError( | |
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fix newline in error message
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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182 _("failed to remove %s from manifest") % f) |
1534 | 183 if dstart != None and dstart <= start and dend >= start: |
184 if dend < end: | |
185 dend = end | |
186 if l: | |
187 dline.append(l) | |
644 | 188 else: |
1534 | 189 if dstart != None: |
190 delta.append([dstart, dend, "".join(dline)]) | |
191 dstart = start | |
192 dend = end | |
193 dline = [l] | |
644 | 194 |
1534 | 195 if dstart != None: |
196 delta.append([dstart, dend, "".join(dline)]) | |
197 # apply the delta to the addlist, and get a delta for addrevision | |
198 cachedelta = addlistdelta(addlist, delta) | |
644 | 199 |
1534 | 200 # the delta is only valid if we've been processing the tip revision |
201 if self.mapcache[0] != self.tip(): | |
202 cachedelta = None | |
203 self.listcache = addlist | |
204 | |
205 n = self.addrevision(buffer(self.listcache), transaction, link, p1, \ | |
206 p2, cachedelta) | |
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Matt Mackall <mpm@selenic.com>
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207 self.mapcache = (n, map) |
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208 |
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209 return n |