Mercurial > hg
annotate mercurial/manifest.py @ 7874:d812029cda85
cleanup: drop variables for unused return values
They are unnecessary. I did leave them in localrepo.py where there is
something like:
_junk = foo()
_junk = None
to free memory early. I don't know if just `foo()` will free the return
value as early.
author | Peter Arrenbrecht <peter.arrenbrecht@gmail.com> |
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date | Mon, 23 Mar 2009 13:13:02 +0100 |
parents | 14a4337a9b9b |
children | d051342f1ad1 |
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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 |
3891 | 8 from i18n import _ |
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9 import array, struct, mdiff, parsers, util, error, revlog |
79 | 10 |
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11 class manifestdict(dict): |
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12 def __init__(self, mapping=None, flags=None): |
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13 if mapping is None: mapping = {} |
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14 if flags is None: flags = {} |
2831 | 15 dict.__init__(self, mapping) |
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16 self._flags = flags |
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17 def flags(self, f): |
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18 return self._flags.get(f, "") |
6743 | 19 def set(self, f, flags): |
20 self._flags[f] = flags | |
2831 | 21 def copy(self): |
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22 return manifestdict(dict.copy(self), dict.copy(self._flags)) |
2831 | 23 |
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24 class manifest(revlog.revlog): |
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25 def __init__(self, opener): |
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26 self.mapcache = None |
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27 self.listcache = None |
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28 revlog.revlog.__init__(self, opener, "00manifest.i") |
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29 |
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30 def parse(self, lines): |
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31 mfdict = manifestdict() |
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32 parsers.parse_manifest(mfdict, mfdict._flags, lines) |
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33 return mfdict |
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34 |
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35 def readdelta(self, node): |
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36 r = self.rev(node) |
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37 return self.parse(mdiff.patchtext(self.revdiff(r - 1, r))) |
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38 |
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39 def read(self, node): |
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40 if node == revlog.nullid: |
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41 return manifestdict() # don't upset local cache |
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42 if self.mapcache and self.mapcache[0] == node: |
561 | 43 return self.mapcache[1] |
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44 text = self.revision(node) |
1534 | 45 self.listcache = array.array('c', text) |
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46 mapping = self.parse(text) |
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47 self.mapcache = (node, mapping) |
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48 return mapping |
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49 |
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50 def _search(self, m, s, lo=0, hi=None): |
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51 '''return a tuple (start, end) that says where to find s within m. |
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52 |
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53 If the string is found m[start:end] are the line containing |
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54 that string. If start == end the string was not found and |
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55 they indicate the proper sorted insertion point. This was |
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56 taken from bisect_left, and modified to find line start/end as |
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57 it goes along. |
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58 |
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59 m should be a buffer or a string |
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60 s is a string''' |
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61 def advance(i, c): |
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62 while i < lenm and m[i] != c: |
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63 i += 1 |
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64 return i |
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65 if not s: |
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66 return (lo, lo) |
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67 lenm = len(m) |
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68 if not hi: |
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69 hi = lenm |
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70 while lo < hi: |
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71 mid = (lo + hi) // 2 |
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72 start = mid |
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73 while start > 0 and m[start-1] != '\n': |
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74 start -= 1 |
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75 end = advance(start, '\0') |
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76 if m[start:end] < s: |
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77 # we know that after the null there are 40 bytes of sha1 |
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78 # this translates to the bisect lo = mid + 1 |
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79 lo = advance(end + 40, '\n') + 1 |
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80 else: |
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81 # this translates to the bisect hi = mid |
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82 hi = start |
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83 end = advance(lo, '\0') |
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84 found = m[lo:end] |
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85 if cmp(s, found) == 0: |
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86 # we know that after the null there are 40 bytes of sha1 |
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87 end = advance(end + 40, '\n') |
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88 return (lo, end+1) |
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89 else: |
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90 return (lo, lo) |
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91 |
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92 def find(self, node, f): |
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93 '''look up entry for a single file efficiently. |
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94 return (node, flags) pair if found, (None, None) if not.''' |
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95 if self.mapcache and node == self.mapcache[0]: |
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96 return self.mapcache[1].get(f), self.mapcache[1].flags(f) |
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97 text = self.revision(node) |
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98 start, end = self._search(text, f) |
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99 if start == end: |
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100 return None, None |
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101 l = text[start:end] |
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102 f, n = l.split('\0') |
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103 return revlog.bin(n[:40]), n[40:-1] |
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104 |
2841 | 105 def add(self, map, transaction, link, p1=None, p2=None, |
741 | 106 changed=None): |
644 | 107 # apply the changes collected during the bisect loop to our addlist |
1534 | 108 # return a delta suitable for addrevision |
109 def addlistdelta(addlist, x): | |
110 # start from the bottom up | |
644 | 111 # so changes to the offsets don't mess things up. |
1534 | 112 i = len(x) |
644 | 113 while i > 0: |
114 i -= 1 | |
1534 | 115 start = x[i][0] |
116 end = x[i][1] | |
117 if x[i][2]: | |
118 addlist[start:end] = array.array('c', x[i][2]) | |
644 | 119 else: |
120 del addlist[start:end] | |
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121 return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] |
1534 | 122 for d in x ]) |
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123 |
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124 def checkforbidden(l): |
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125 for f in l: |
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126 if '\n' in f or '\r' in f: |
7633 | 127 raise error.RevlogError( |
128 _("'\\n' and '\\r' disallowed in filenames")) | |
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129 |
644 | 130 # if we're using the listcache, make sure it is valid and |
131 # parented by the same node we're diffing against | |
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132 if not (changed and self.listcache and p1 and self.mapcache[0] == p1): |
6762 | 133 files = util.sort(map) |
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134 checkforbidden(files) |
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135 |
1651 | 136 # if this is changed to support newlines in filenames, |
137 # be sure to check the templates/ dir again (especially *-raw.tmpl) | |
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138 hex, flags = revlog.hex, map.flags |
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139 text = ["%s\000%s%s\n" % (f, hex(map[f]), flags(f)) |
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Cleanup of whitespace, indentation and line continuation.
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140 for f in files] |
1534 | 141 self.listcache = array.array('c', "".join(text)) |
644 | 142 cachedelta = None |
143 else: | |
1534 | 144 addlist = self.listcache |
644 | 145 |
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146 checkforbidden(changed[0]) |
644 | 147 # combine the changed lists into one list for sorting |
148 work = [[x, 0] for x in changed[0]] | |
149 work[len(work):] = [[x, 1] for x in changed[1]] | |
150 work.sort() | |
151 | |
152 delta = [] | |
1534 | 153 dstart = None |
154 dend = None | |
155 dline = [""] | |
156 start = 0 | |
157 # zero copy representation of addlist as a buffer | |
158 addbuf = buffer(addlist) | |
644 | 159 |
1534 | 160 # start with a readonly loop that finds the offset of |
161 # each line and creates the deltas | |
644 | 162 for w in work: |
163 f = w[0] | |
741 | 164 # bs will either be the index of the item or the insert point |
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165 start, end = self._search(addbuf, f, start) |
644 | 166 if w[1] == 0: |
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167 l = "%s\000%s%s\n" % (f, revlog.hex(map[f]), map.flags(f)) |
644 | 168 else: |
1534 | 169 l = "" |
170 if start == end and w[1] == 1: | |
171 # item we want to delete was not found, error out | |
172 raise AssertionError( | |
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173 _("failed to remove %s from manifest") % f) |
1534 | 174 if dstart != None and dstart <= start and dend >= start: |
175 if dend < end: | |
176 dend = end | |
177 if l: | |
178 dline.append(l) | |
644 | 179 else: |
1534 | 180 if dstart != None: |
181 delta.append([dstart, dend, "".join(dline)]) | |
182 dstart = start | |
183 dend = end | |
184 dline = [l] | |
644 | 185 |
1534 | 186 if dstart != None: |
187 delta.append([dstart, dend, "".join(dline)]) | |
188 # apply the delta to the addlist, and get a delta for addrevision | |
189 cachedelta = addlistdelta(addlist, delta) | |
644 | 190 |
1534 | 191 # the delta is only valid if we've been processing the tip revision |
192 if self.mapcache[0] != self.tip(): | |
193 cachedelta = None | |
194 self.listcache = addlist | |
195 | |
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196 n = self.addrevision(buffer(self.listcache), transaction, link, |
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197 p1, p2, cachedelta) |
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198 self.mapcache = (n, map) |
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199 |
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200 return n |