Mercurial > hg
annotate mercurial/changelog.py @ 15621:013688350c7d
bookmarks: update and updatecurrentbookmark return status
This makes bookmarks.update() and bookmarks.updatecurrentbookmark() return
True or False to indicate whether the bookmark was updated or not. This allows
callers to e.g. abort if the update failed.
author | Kevin Bullock <kbullock@ringworld.org> |
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date | Wed, 16 Nov 2011 15:29:57 -0600 |
parents | 7e295dd10d40 |
children | 20ae902c43ec |
rev | line source |
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1095 | 1 # changelog.py - changelog 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 of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from node import bin, hex, nullid |
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9 from i18n import _ |
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10 import util, error, revlog, encoding |
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11 |
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12 def _string_escape(text): |
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13 """ |
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14 >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)} |
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15 >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d |
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16 >>> s |
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17 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' |
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18 >>> res = _string_escape(s) |
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19 >>> s == res.decode('string_escape') |
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20 True |
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21 """ |
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22 # subset of the string_escape codec |
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23 text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') |
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24 return text.replace('\0', '\\0') |
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25 |
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26 def decodeextra(text): |
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27 extra = {} |
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28 for l in text.split('\0'): |
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29 if l: |
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30 k, v = l.decode('string_escape').split(':', 1) |
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31 extra[k] = v |
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32 return extra |
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33 |
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34 def encodeextra(d): |
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35 # keys must be sorted to produce a deterministic changelog entry |
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36 items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)] |
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37 return "\0".join(items) |
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38 |
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39 class appender(object): |
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40 '''the changelog index must be updated last on disk, so we use this class |
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41 to delay writes to it''' |
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42 def __init__(self, fp, buf): |
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43 self.data = buf |
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44 self.fp = fp |
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45 self.offset = fp.tell() |
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46 self.size = util.fstat(fp).st_size |
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47 |
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48 def end(self): |
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49 return self.size + len("".join(self.data)) |
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50 def tell(self): |
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51 return self.offset |
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52 def flush(self): |
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53 pass |
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54 def close(self): |
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55 self.fp.close() |
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56 |
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57 def seek(self, offset, whence=0): |
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58 '''virtual file offset spans real file and data''' |
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59 if whence == 0: |
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60 self.offset = offset |
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61 elif whence == 1: |
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62 self.offset += offset |
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63 elif whence == 2: |
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64 self.offset = self.end() + offset |
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65 if self.offset < self.size: |
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66 self.fp.seek(self.offset) |
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67 |
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68 def read(self, count=-1): |
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69 '''only trick here is reads that span real file and data''' |
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70 ret = "" |
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71 if self.offset < self.size: |
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72 s = self.fp.read(count) |
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73 ret = s |
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74 self.offset += len(s) |
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75 if count > 0: |
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76 count -= len(s) |
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77 if count != 0: |
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78 doff = self.offset - self.size |
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79 self.data.insert(0, "".join(self.data)) |
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80 del self.data[1:] |
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81 s = self.data[0][doff:doff + count] |
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82 self.offset += len(s) |
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83 ret += s |
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84 return ret |
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85 |
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86 def write(self, s): |
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87 self.data.append(str(s)) |
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88 self.offset += len(s) |
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89 |
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90 def delayopener(opener, target, divert, buf): |
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91 def o(name, mode='r'): |
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92 if name != target: |
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93 return opener(name, mode) |
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94 if divert: |
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95 return opener(name + ".a", mode.replace('a', 'w')) |
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96 # otherwise, divert to memory |
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97 return appender(opener(name, mode), buf) |
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98 return o |
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99 |
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100 class changelog(revlog.revlog): |
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101 def __init__(self, opener): |
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102 revlog.revlog.__init__(self, opener, "00changelog.i") |
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103 if self._initempty: |
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104 # changelogs don't benefit from generaldelta |
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105 self.version &= ~revlog.REVLOGGENERALDELTA |
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106 self._generaldelta = False |
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107 self._realopener = opener |
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108 self._delayed = False |
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109 self._divert = False |
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110 # hiddenrevs: revs that should be hidden by command and tools |
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111 self.hiddenrevs = set() |
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112 |
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113 def delayupdate(self): |
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114 "delay visibility of index updates to other readers" |
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115 self._delayed = True |
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116 self._divert = (len(self) == 0) |
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117 self._delaybuf = [] |
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118 self.opener = delayopener(self._realopener, self.indexfile, |
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119 self._divert, self._delaybuf) |
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120 |
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121 def finalize(self, tr): |
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122 "finalize index updates" |
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123 self._delayed = False |
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124 self.opener = self._realopener |
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125 # move redirected index data back into place |
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126 if self._divert: |
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127 nfile = self.opener(self.indexfile + ".a") |
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128 n = nfile.name |
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129 nfile.close() |
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130 util.rename(n, n[:-2]) |
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131 elif self._delaybuf: |
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132 fp = self.opener(self.indexfile, 'a') |
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133 fp.write("".join(self._delaybuf)) |
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134 fp.close() |
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135 self._delaybuf = [] |
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136 # split when we're done |
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137 self.checkinlinesize(tr) |
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138 |
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139 def readpending(self, file): |
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140 r = revlog.revlog(self.opener, file) |
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141 self.index = r.index |
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142 self.nodemap = r.nodemap |
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143 self._chunkcache = r._chunkcache |
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144 |
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145 def writepending(self): |
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146 "create a file containing the unfinalized state for pretxnchangegroup" |
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147 if self._delaybuf: |
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148 # make a temporary copy of the index |
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149 fp1 = self._realopener(self.indexfile) |
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150 fp2 = self._realopener(self.indexfile + ".a", "w") |
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151 fp2.write(fp1.read()) |
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152 # add pending data |
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153 fp2.write("".join(self._delaybuf)) |
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154 fp2.close() |
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155 # switch modes so finalize can simply rename |
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156 self._delaybuf = [] |
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157 self._divert = True |
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158 |
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159 if self._divert: |
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160 return True |
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161 |
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162 return False |
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163 |
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164 def checkinlinesize(self, tr, fp=None): |
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165 if not self._delayed: |
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166 revlog.revlog.checkinlinesize(self, tr, fp) |
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167 |
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168 def read(self, node): |
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169 """ |
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170 format used: |
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171 nodeid\n : manifest node in ascii |
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172 user\n : user, no \n or \r allowed |
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173 time tz extra\n : date (time is int or float, timezone is int) |
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174 : extra is metadatas, encoded and separated by '\0' |
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175 : older versions ignore it |
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176 files\n\n : files modified by the cset, no \n or \r allowed |
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177 (.*) : comment (free text, ideally utf-8) |
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178 |
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179 changelog v0 doesn't use extra |
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180 """ |
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181 text = self.revision(node) |
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183 return (nullid, "", (0, 0), [], "", {'branch': 'default'}) |
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184 last = text.index("\n\n") |
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185 desc = encoding.tolocal(text[last + 2:]) |
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186 l = text[:last].split('\n') |
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187 manifest = bin(l[0]) |
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188 user = encoding.tolocal(l[1]) |
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189 |
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190 extra_data = l[2].split(' ', 2) |
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191 if len(extra_data) != 3: |
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192 time = float(extra_data.pop(0)) |
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193 try: |
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194 # various tools did silly things with the time zone field. |
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195 timezone = int(extra_data[0]) |
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196 except ValueError: |
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197 timezone = 0 |
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198 extra = {} |
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199 else: |
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200 time, timezone, extra = extra_data |
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201 time, timezone = float(time), int(timezone) |
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202 extra = decodeextra(extra) |
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203 if not extra.get('branch'): |
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204 extra['branch'] = 'default' |
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205 files = l[3:] |
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206 return (manifest, user, (time, timezone), files, desc, extra) |
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207 |
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208 def add(self, manifest, files, desc, transaction, p1, p2, |
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209 user, date=None, extra=None): |
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210 # Convert to UTF-8 encoded bytestrings as the very first |
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211 # thing: calling any method on a localstr object will turn it |
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212 # into a str object and the cached UTF-8 string is thus lost. |
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213 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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214 |
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215 user = user.strip() |
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216 # An empty username or a username with a "\n" will make the |
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217 # revision text contain two "\n\n" sequences -> corrupt |
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218 # repository since read cannot unpack the revision. |
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219 if not user: |
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220 raise error.RevlogError(_("empty username")) |
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221 if "\n" in user: |
7633 | 222 raise error.RevlogError(_("username %s contains a newline") |
223 % repr(user)) | |
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224 |
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225 # strip trailing whitespace and leading and trailing empty lines |
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226 desc = '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n') |
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227 |
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228 if date: |
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229 parseddate = "%d %d" % util.parsedate(date) |
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230 else: |
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231 parseddate = "%d %d" % util.makedate() |
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232 if extra: |
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233 branch = extra.get("branch") |
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234 if branch in ("default", ""): |
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parents:
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235 del extra["branch"] |
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236 elif branch in (".", "null", "tip"): |
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237 raise error.RevlogError(_('the name \'%s\' is reserved') |
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238 % branch) |
3233
2f35961854fb
[extendedchangelog] add extra metadata in the changelog entry
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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3232
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239 if extra: |
8443
53ff4a5af284
changelog: turn {de,en}code_extra methods into functions
Martin Geisler <mg@lazybytes.net>
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240 extra = encodeextra(extra) |
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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241 parseddate = "%s %s" % (parseddate, extra) |
8209
a1a5a57efe90
replace util.sort with sorted built-in
Matt Mackall <mpm@selenic.com>
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242 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
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243 text = "\n".join(l) |
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fb42030d79d6
add __len__ and __iter__ methods to repo and revlog
Matt Mackall <mpm@selenic.com>
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244 return self.addrevision(text, transaction, len(self), p1, p2) |