Mercurial > hg
annotate mercurial/changelog.py @ 17509:f7767f52e9eb
spelling: recursion
author | timeless@mozdev.org |
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date | Fri, 17 Aug 2012 13:58:18 -0700 |
parents | 62c56c94c77e |
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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 _defaultextra = {'branch': 'default'} |
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13 |
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14 def _string_escape(text): |
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15 """ |
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16 >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)} |
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17 >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d |
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18 >>> s |
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19 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' |
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20 >>> res = _string_escape(s) |
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21 >>> s == res.decode('string_escape') |
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22 True |
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23 """ |
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24 # subset of the string_escape codec |
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25 text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') |
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26 return text.replace('\0', '\\0') |
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27 |
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28 def decodeextra(text): |
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29 """ |
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30 >>> decodeextra(encodeextra({'foo': 'bar', 'baz': chr(0) + '2'})) |
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31 {'foo': 'bar', 'baz': '\\x002', 'branch': 'default'} |
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32 >>> decodeextra(encodeextra({'foo': 'bar', 'baz': chr(92) + chr(0) + '2'})) |
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33 {'foo': 'bar', 'baz': '\\\\\\x002', 'branch': 'default'} |
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34 """ |
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35 extra = _defaultextra.copy() |
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36 for l in text.split('\0'): |
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37 if l: |
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38 if '\\0' in l: |
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39 # fix up \0 without getting into trouble with \\0 |
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40 l = l.replace('\\\\', '\\\\\n') |
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41 l = l.replace('\\0', '\0') |
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42 l = l.replace('\n', '') |
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43 k, v = l.decode('string_escape').split(':', 1) |
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44 extra[k] = v |
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45 return extra |
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46 |
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47 def encodeextra(d): |
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48 # keys must be sorted to produce a deterministic changelog entry |
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49 items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)] |
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50 return "\0".join(items) |
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51 |
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52 class appender(object): |
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53 '''the changelog index must be updated last on disk, so we use this class |
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54 to delay writes to it''' |
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55 def __init__(self, fp, buf): |
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56 self.data = buf |
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57 self.fp = fp |
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58 self.offset = fp.tell() |
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59 self.size = util.fstat(fp).st_size |
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60 |
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61 def end(self): |
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62 return self.size + len("".join(self.data)) |
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63 def tell(self): |
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64 return self.offset |
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65 def flush(self): |
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66 pass |
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67 def close(self): |
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68 self.fp.close() |
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69 |
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70 def seek(self, offset, whence=0): |
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71 '''virtual file offset spans real file and data''' |
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72 if whence == 0: |
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73 self.offset = offset |
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74 elif whence == 1: |
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75 self.offset += offset |
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76 elif whence == 2: |
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77 self.offset = self.end() + offset |
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78 if self.offset < self.size: |
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79 self.fp.seek(self.offset) |
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80 |
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81 def read(self, count=-1): |
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82 '''only trick here is reads that span real file and data''' |
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83 ret = "" |
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84 if self.offset < self.size: |
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85 s = self.fp.read(count) |
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86 ret = s |
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87 self.offset += len(s) |
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88 if count > 0: |
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89 count -= len(s) |
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90 if count != 0: |
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91 doff = self.offset - self.size |
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92 self.data.insert(0, "".join(self.data)) |
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93 del self.data[1:] |
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94 s = self.data[0][doff:doff + count] |
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95 self.offset += len(s) |
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96 ret += s |
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97 return ret |
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98 |
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99 def write(self, s): |
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100 self.data.append(str(s)) |
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101 self.offset += len(s) |
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102 |
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103 def delayopener(opener, target, divert, buf): |
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104 def o(name, mode='r'): |
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105 if name != target: |
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106 return opener(name, mode) |
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107 if divert: |
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108 return opener(name + ".a", mode.replace('a', 'w')) |
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109 # otherwise, divert to memory |
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110 return appender(opener(name, mode), buf) |
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111 return o |
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112 |
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113 class changelog(revlog.revlog): |
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114 def __init__(self, opener): |
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115 revlog.revlog.__init__(self, opener, "00changelog.i") |
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116 if self._initempty: |
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117 # changelogs don't benefit from generaldelta |
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118 self.version &= ~revlog.REVLOGGENERALDELTA |
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119 self._generaldelta = False |
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120 self._realopener = opener |
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121 self._delayed = False |
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122 self._divert = False |
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123 |
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124 def delayupdate(self): |
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125 "delay visibility of index updates to other readers" |
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126 self._delayed = True |
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127 self._divert = (len(self) == 0) |
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128 self._delaybuf = [] |
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129 self.opener = delayopener(self._realopener, self.indexfile, |
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130 self._divert, self._delaybuf) |
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131 |
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132 def finalize(self, tr): |
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133 "finalize index updates" |
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134 self._delayed = False |
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135 self.opener = self._realopener |
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136 # move redirected index data back into place |
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137 if self._divert: |
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138 nfile = self.opener(self.indexfile + ".a") |
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139 n = nfile.name |
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140 nfile.close() |
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141 util.rename(n, n[:-2]) |
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142 elif self._delaybuf: |
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143 fp = self.opener(self.indexfile, 'a') |
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144 fp.write("".join(self._delaybuf)) |
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145 fp.close() |
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146 self._delaybuf = [] |
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147 # split when we're done |
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148 self.checkinlinesize(tr) |
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149 |
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150 def readpending(self, file): |
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151 r = revlog.revlog(self.opener, file) |
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152 self.index = r.index |
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153 self.nodemap = r.nodemap |
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154 self._nodecache = r._nodecache |
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155 self._chunkcache = r._chunkcache |
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156 |
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157 def writepending(self): |
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158 "create a file containing the unfinalized state for pretxnchangegroup" |
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159 if self._delaybuf: |
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160 # make a temporary copy of the index |
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161 fp1 = self._realopener(self.indexfile) |
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162 fp2 = self._realopener(self.indexfile + ".a", "w") |
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163 fp2.write(fp1.read()) |
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164 # add pending data |
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165 fp2.write("".join(self._delaybuf)) |
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166 fp2.close() |
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167 # switch modes so finalize can simply rename |
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168 self._delaybuf = [] |
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169 self._divert = True |
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170 |
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171 if self._divert: |
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172 return True |
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173 |
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174 return False |
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175 |
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176 def checkinlinesize(self, tr, fp=None): |
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177 if not self._delayed: |
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178 revlog.revlog.checkinlinesize(self, tr, fp) |
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179 |
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180 def read(self, node): |
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181 """ |
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182 format used: |
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183 nodeid\n : manifest node in ascii |
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184 user\n : user, no \n or \r allowed |
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185 time tz extra\n : date (time is int or float, timezone is int) |
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186 : extra is metadatas, encoded and separated by '\0' |
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187 : older versions ignore it |
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188 files\n\n : files modified by the cset, no \n or \r allowed |
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189 (.*) : comment (free text, ideally utf-8) |
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190 |
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191 changelog v0 doesn't use extra |
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192 """ |
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193 text = self.revision(node) |
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195 return (nullid, "", (0, 0), [], "", _defaultextra) |
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196 last = text.index("\n\n") |
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197 desc = encoding.tolocal(text[last + 2:]) |
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198 l = text[:last].split('\n') |
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199 manifest = bin(l[0]) |
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200 user = encoding.tolocal(l[1]) |
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201 |
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202 tdata = l[2].split(' ', 2) |
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203 if len(tdata) != 3: |
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204 time = float(tdata[0]) |
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205 try: |
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206 # various tools did silly things with the time zone field. |
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207 timezone = int(tdata[1]) |
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208 except ValueError: |
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209 timezone = 0 |
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210 extra = _defaultextra |
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211 else: |
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212 time, timezone = float(tdata[0]), int(tdata[1]) |
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213 extra = decodeextra(tdata[2]) |
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214 |
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215 files = l[3:] |
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216 return (manifest, user, (time, timezone), files, desc, extra) |
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217 |
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218 def add(self, manifest, files, desc, transaction, p1, p2, |
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219 user, date=None, extra=None): |
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220 # Convert to UTF-8 encoded bytestrings as the very first |
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221 # thing: calling any method on a localstr object will turn it |
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222 # into a str object and the cached UTF-8 string is thus lost. |
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223 user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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224 |
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225 user = user.strip() |
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226 # An empty username or a username with a "\n" will make the |
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227 # revision text contain two "\n\n" sequences -> corrupt |
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228 # repository since read cannot unpack the revision. |
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229 if not user: |
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230 raise error.RevlogError(_("empty username")) |
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231 if "\n" in user: |
7633 | 232 raise error.RevlogError(_("username %s contains a newline") |
233 % repr(user)) | |
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234 |
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235 # strip trailing whitespace and leading and trailing empty lines |
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236 desc = '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n') |
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237 |
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Validate user input of dates when adding a changelog entry.
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238 if date: |
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validate the resulting date in parsedate
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239 parseddate = "%d %d" % util.parsedate(date) |
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240 else: |
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Allow the use of human readable dates (issue 251)
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241 parseddate = "%d %d" % util.makedate() |
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242 if extra: |
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243 branch = extra.get("branch") |
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244 if branch in ("default", ""): |
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245 del extra["branch"] |
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246 elif branch in (".", "null", "tip"): |
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247 raise error.RevlogError(_('the name \'%s\' is reserved') |
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248 % branch) |
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[extendedchangelog] add extra metadata in the changelog entry
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249 if extra: |
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250 extra = encodeextra(extra) |
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251 parseddate = "%s %s" % (parseddate, extra) |
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252 l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
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253 text = "\n".join(l) |
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254 return self.addrevision(text, transaction, len(self), p1, p2) |