Mercurial > hg
annotate mercurial/manifest.py @ 6408:3f5f23ba18bc
fix warning from pychecker
author | Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
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date | Sun, 30 Mar 2008 20:21:57 +0200 |
parents | 0231f763ebc8 |
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1089 | 1 # manifest.py - manifest revision class for mercurial |
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2 # |
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3 # Copyright 2005-2007 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 |
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8 from node import bin, hex, nullid |
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9 from revlog import revlog, RevlogError |
3891 | 10 from i18n import _ |
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11 import array, struct, mdiff, parsers |
79 | 12 |
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13 class manifestdict(dict): |
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14 def __init__(self, mapping=None, flags=None): |
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15 if mapping is None: mapping = {} |
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16 if flags is None: flags = {} |
2831 | 17 dict.__init__(self, mapping) |
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18 self._flags = flags |
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19 def flags(self, f): |
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20 return self._flags.get(f, "") |
2831 | 21 def execf(self, f): |
22 "test for executable in manifest flags" | |
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23 return "x" in self.flags(f) |
2831 | 24 def linkf(self, f): |
25 "test for symlink in manifest flags" | |
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26 return "l" in self.flags(f) |
2831 | 27 def set(self, f, execf=False, linkf=False): |
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28 if linkf: self._flags[f] = "l" |
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29 elif execf: self._flags[f] = "x" |
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30 else: self._flags[f] = "" |
2831 | 31 def copy(self): |
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32 return manifestdict(dict.copy(self), dict.copy(self._flags)) |
2831 | 33 |
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34 class manifest(revlog): |
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35 def __init__(self, opener): |
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36 self.mapcache = None |
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37 self.listcache = None |
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38 revlog.__init__(self, opener, "00manifest.i") |
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39 |
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40 def parse(self, lines): |
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41 mfdict = manifestdict() |
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42 parsers.parse_manifest(mfdict, mfdict._flags, lines) |
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43 return mfdict |
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44 |
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45 def readdelta(self, node): |
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46 return self.parse(mdiff.patchtext(self.delta(node))) |
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47 |
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48 def read(self, node): |
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49 if node == nullid: return manifestdict() # don't upset local cache |
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50 if self.mapcache and self.mapcache[0] == node: |
561 | 51 return self.mapcache[1] |
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52 text = self.revision(node) |
1534 | 53 self.listcache = array.array('c', text) |
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54 mapping = self.parse(text) |
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55 self.mapcache = (node, mapping) |
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56 return mapping |
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57 |
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58 def _search(self, m, s, lo=0, hi=None): |
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59 '''return a tuple (start, end) that says where to find s within m. |
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60 |
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61 If the string is found m[start:end] are the line containing |
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62 that string. If start == end the string was not found and |
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63 they indicate the proper sorted insertion point. This was |
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64 taken from bisect_left, and modified to find line start/end as |
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65 it goes along. |
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66 |
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67 m should be a buffer or a string |
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68 s is a string''' |
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69 def advance(i, c): |
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70 while i < lenm and m[i] != c: |
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71 i += 1 |
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72 return i |
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73 lenm = len(m) |
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74 if not hi: |
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75 hi = lenm |
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76 while lo < hi: |
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77 mid = (lo + hi) // 2 |
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78 start = mid |
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79 while start > 0 and m[start-1] != '\n': |
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80 start -= 1 |
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81 end = advance(start, '\0') |
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82 if m[start:end] < s: |
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83 # we know that after the null there are 40 bytes of sha1 |
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84 # this translates to the bisect lo = mid + 1 |
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85 lo = advance(end + 40, '\n') + 1 |
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86 else: |
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87 # this translates to the bisect hi = mid |
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88 hi = start |
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89 end = advance(lo, '\0') |
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90 found = m[lo:end] |
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91 if cmp(s, found) == 0: |
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92 # we know that after the null there are 40 bytes of sha1 |
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93 end = advance(end + 40, '\n') |
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94 return (lo, end+1) |
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95 else: |
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96 return (lo, lo) |
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97 |
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98 def find(self, node, f): |
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99 '''look up entry for a single file efficiently. |
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100 return (node, flags) pair if found, (None, None) if not.''' |
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101 if self.mapcache and node == self.mapcache[0]: |
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102 return self.mapcache[1].get(f), self.mapcache[1].flags(f) |
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103 text = self.revision(node) |
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104 start, end = self._search(text, f) |
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105 if start == end: |
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106 return None, None |
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107 l = text[start:end] |
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108 f, n = l.split('\0') |
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109 return bin(n[:40]), n[40:-1] |
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110 |
2841 | 111 def add(self, map, transaction, link, p1=None, p2=None, |
741 | 112 changed=None): |
644 | 113 # apply the changes collected during the bisect loop to our addlist |
1534 | 114 # return a delta suitable for addrevision |
115 def addlistdelta(addlist, x): | |
116 # start from the bottom up | |
644 | 117 # so changes to the offsets don't mess things up. |
1534 | 118 i = len(x) |
644 | 119 while i > 0: |
120 i -= 1 | |
1534 | 121 start = x[i][0] |
122 end = x[i][1] | |
123 if x[i][2]: | |
124 addlist[start:end] = array.array('c', x[i][2]) | |
644 | 125 else: |
126 del addlist[start:end] | |
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127 return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] |
1534 | 128 for d in x ]) |
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129 |
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130 def checkforbidden(f): |
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131 if '\n' in f or '\r' in f: |
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132 raise RevlogError(_("'\\n' and '\\r' disallowed in filenames")) |
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133 |
644 | 134 # if we're using the listcache, make sure it is valid and |
135 # parented by the same node we're diffing against | |
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136 if not (changed and self.listcache and p1 and self.mapcache[0] == p1): |
644 | 137 files = map.keys() |
138 files.sort() | |
139 | |
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issue352: disallow '\n' and '\r' in filenames (dirstate and manifest)
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140 for f in files: |
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141 checkforbidden(f) |
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142 |
1651 | 143 # if this is changed to support newlines in filenames, |
144 # be sure to check the templates/ dir again (especially *-raw.tmpl) | |
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145 text = ["%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) |
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146 for f in files] |
1534 | 147 self.listcache = array.array('c', "".join(text)) |
644 | 148 cachedelta = None |
149 else: | |
1534 | 150 addlist = self.listcache |
644 | 151 |
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152 for f in changed[0]: |
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153 checkforbidden(f) |
644 | 154 # combine the changed lists into one list for sorting |
155 work = [[x, 0] for x in changed[0]] | |
156 work[len(work):] = [[x, 1] for x in changed[1]] | |
157 work.sort() | |
158 | |
159 delta = [] | |
1534 | 160 dstart = None |
161 dend = None | |
162 dline = [""] | |
163 start = 0 | |
164 # zero copy representation of addlist as a buffer | |
165 addbuf = buffer(addlist) | |
644 | 166 |
1534 | 167 # start with a readonly loop that finds the offset of |
168 # each line and creates the deltas | |
644 | 169 for w in work: |
170 f = w[0] | |
741 | 171 # bs will either be the index of the item or the insert point |
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172 start, end = self._search(addbuf, f, start) |
644 | 173 if w[1] == 0: |
2841 | 174 l = "%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) |
644 | 175 else: |
1534 | 176 l = "" |
177 if start == end and w[1] == 1: | |
178 # item we want to delete was not found, error out | |
179 raise AssertionError( | |
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180 _("failed to remove %s from manifest") % f) |
1534 | 181 if dstart != None and dstart <= start and dend >= start: |
182 if dend < end: | |
183 dend = end | |
184 if l: | |
185 dline.append(l) | |
644 | 186 else: |
1534 | 187 if dstart != None: |
188 delta.append([dstart, dend, "".join(dline)]) | |
189 dstart = start | |
190 dend = end | |
191 dline = [l] | |
644 | 192 |
1534 | 193 if dstart != None: |
194 delta.append([dstart, dend, "".join(dline)]) | |
195 # apply the delta to the addlist, and get a delta for addrevision | |
196 cachedelta = addlistdelta(addlist, delta) | |
644 | 197 |
1534 | 198 # the delta is only valid if we've been processing the tip revision |
199 if self.mapcache[0] != self.tip(): | |
200 cachedelta = None | |
201 self.listcache = addlist | |
202 | |
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203 n = self.addrevision(buffer(self.listcache), transaction, link, |
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204 p1, p2, cachedelta) |
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205 self.mapcache = (n, map) |
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206 |
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207 return n |