Mercurial > hg
annotate mercurial/changegroup.py @ 24946:c44534209a0a
bookmarks: rename readcurrent to readactive (API)
Today, the terms 'active' and 'current' are interchangeably used throughout the
codebase in reference to the active bookmark (the bookmark that will be updated
with the next commit). This leads to confusion among developers and users.
This patch is part of a series to standardize the usage to 'active' throughout
the mercurial codebase and user interface.
author | Ryan McElroy <rmcelroy@fb.com> |
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date | Mon, 13 Apr 2015 23:03:13 -0700 |
parents | e285b98c65cc |
children | 147d8892fc4b |
rev | line source |
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1 # changegroup.py - Mercurial changegroup manipulation functions |
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2 # |
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3 # Copyright 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 of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import weakref |
3891 | 9 from i18n import _ |
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10 from node import nullrev, nullid, hex, short |
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11 import mdiff, util, dagutil |
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12 import struct, os, bz2, zlib, tempfile |
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13 import discovery, error, phases, branchmap |
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14 |
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15 _CHANGEGROUPV1_DELTA_HEADER = "20s20s20s20s" |
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16 _CHANGEGROUPV2_DELTA_HEADER = "20s20s20s20s20s" |
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17 |
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18 def readexactly(stream, n): |
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19 '''read n bytes from stream.read and abort if less was available''' |
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20 s = stream.read(n) |
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21 if len(s) < n: |
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22 raise util.Abort(_("stream ended unexpectedly" |
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23 " (got %d bytes, expected %d)") |
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24 % (len(s), n)) |
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25 return s |
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26 |
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27 def getchunk(stream): |
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28 """return the next chunk from stream as a string""" |
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29 d = readexactly(stream, 4) |
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30 l = struct.unpack(">l", d)[0] |
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31 if l <= 4: |
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32 if l: |
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33 raise util.Abort(_("invalid chunk length %d") % l) |
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34 return "" |
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35 return readexactly(stream, l - 4) |
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36 |
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37 def chunkheader(length): |
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38 """return a changegroup chunk header (string)""" |
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39 return struct.pack(">l", length + 4) |
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40 |
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41 def closechunk(): |
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42 """return a changegroup chunk header (string) for a zero-length chunk""" |
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43 return struct.pack(">l", 0) |
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44 |
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45 def combineresults(results): |
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46 """logic to combine 0 or more addchangegroup results into one""" |
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47 changedheads = 0 |
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48 result = 1 |
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49 for ret in results: |
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50 # If any changegroup result is 0, return 0 |
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51 if ret == 0: |
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52 result = 0 |
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53 break |
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54 if ret < -1: |
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55 changedheads += ret + 1 |
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56 elif ret > 1: |
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57 changedheads += ret - 1 |
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58 if changedheads > 0: |
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59 result = 1 + changedheads |
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60 elif changedheads < 0: |
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61 result = -1 + changedheads |
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62 return result |
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63 |
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64 class nocompress(object): |
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65 def compress(self, x): |
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66 return x |
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67 def flush(self): |
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68 return "" |
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69 |
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70 bundletypes = { |
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71 "": ("", nocompress), # only when using unbundle on ssh and old http servers |
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72 # since the unification ssh accepts a header but there |
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73 # is no capability signaling it. |
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74 "HG20": (), # special-cased below |
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75 "HG10UN": ("HG10UN", nocompress), |
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76 "HG10BZ": ("HG10", lambda: bz2.BZ2Compressor()), |
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77 "HG10GZ": ("HG10GZ", lambda: zlib.compressobj()), |
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78 } |
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79 |
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81 bundlepriority = ['HG10GZ', 'HG10BZ', 'HG10UN'] |
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82 |
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83 def writebundle(ui, cg, filename, bundletype, vfs=None): |
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84 """Write a bundle file and return its filename. |
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85 |
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86 Existing files will not be overwritten. |
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87 If no filename is specified, a temporary file is created. |
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88 bz2 compression can be turned off. |
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89 The bundle file will be deleted in case of errors. |
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90 """ |
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91 |
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92 fh = None |
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93 cleanup = None |
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94 try: |
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95 if filename: |
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96 if vfs: |
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97 fh = vfs.open(filename, "wb") |
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98 else: |
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99 fh = open(filename, "wb") |
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100 else: |
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101 fd, filename = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg") |
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102 fh = os.fdopen(fd, "wb") |
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103 cleanup = filename |
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104 |
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105 if bundletype == "HG20": |
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106 import bundle2 |
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107 bundle = bundle2.bundle20(ui) |
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108 part = bundle.newpart('changegroup', data=cg.getchunks()) |
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109 part.addparam('version', cg.version) |
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110 z = nocompress() |
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111 chunkiter = bundle.getchunks() |
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112 else: |
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113 if cg.version != '01': |
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114 raise util.Abort(_('old bundle types only supports v1 ' |
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115 'changegroups')) |
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116 header, compressor = bundletypes[bundletype] |
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117 fh.write(header) |
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118 z = compressor() |
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119 chunkiter = cg.getchunks() |
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120 |
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121 # parse the changegroup data, otherwise we will block |
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122 # in case of sshrepo because we don't know the end of the stream |
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123 |
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124 # an empty chunkgroup is the end of the changegroup |
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125 # a changegroup has at least 2 chunkgroups (changelog and manifest). |
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126 # after that, an empty chunkgroup is the end of the changegroup |
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127 for chunk in chunkiter: |
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128 fh.write(z.compress(chunk)) |
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129 fh.write(z.flush()) |
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130 cleanup = None |
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131 return filename |
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132 finally: |
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133 if fh is not None: |
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134 fh.close() |
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135 if cleanup is not None: |
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136 if filename and vfs: |
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137 vfs.unlink(cleanup) |
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138 else: |
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139 os.unlink(cleanup) |
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140 |
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141 def decompressor(fh, alg): |
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142 if alg == 'UN': |
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143 return fh |
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144 elif alg == 'GZ': |
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145 def generator(f): |
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146 zd = zlib.decompressobj() |
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147 for chunk in util.filechunkiter(f): |
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148 yield zd.decompress(chunk) |
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149 elif alg == 'BZ': |
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150 def generator(f): |
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151 zd = bz2.BZ2Decompressor() |
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152 zd.decompress("BZ") |
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153 for chunk in util.filechunkiter(f, 4096): |
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154 yield zd.decompress(chunk) |
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155 else: |
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156 raise util.Abort("unknown bundle compression '%s'" % alg) |
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157 return util.chunkbuffer(generator(fh)) |
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158 |
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159 class cg1unpacker(object): |
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160 deltaheader = _CHANGEGROUPV1_DELTA_HEADER |
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161 deltaheadersize = struct.calcsize(deltaheader) |
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162 version = '01' |
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163 def __init__(self, fh, alg): |
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164 self._stream = decompressor(fh, alg) |
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165 self._type = alg |
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166 self.callback = None |
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167 def compressed(self): |
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168 return self._type != 'UN' |
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169 def read(self, l): |
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170 return self._stream.read(l) |
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171 def seek(self, pos): |
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172 return self._stream.seek(pos) |
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173 def tell(self): |
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174 return self._stream.tell() |
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175 def close(self): |
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176 return self._stream.close() |
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177 |
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178 def chunklength(self): |
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179 d = readexactly(self._stream, 4) |
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180 l = struct.unpack(">l", d)[0] |
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181 if l <= 4: |
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182 if l: |
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183 raise util.Abort(_("invalid chunk length %d") % l) |
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184 return 0 |
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185 if self.callback: |
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186 self.callback() |
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187 return l - 4 |
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188 |
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189 def changelogheader(self): |
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190 """v10 does not have a changelog header chunk""" |
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191 return {} |
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192 |
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193 def manifestheader(self): |
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194 """v10 does not have a manifest header chunk""" |
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195 return {} |
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196 |
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197 def filelogheader(self): |
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198 """return the header of the filelogs chunk, v10 only has the filename""" |
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199 l = self.chunklength() |
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200 if not l: |
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201 return {} |
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202 fname = readexactly(self._stream, l) |
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203 return {'filename': fname} |
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204 |
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205 def _deltaheader(self, headertuple, prevnode): |
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206 node, p1, p2, cs = headertuple |
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207 if prevnode is None: |
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208 deltabase = p1 |
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209 else: |
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210 deltabase = prevnode |
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211 return node, p1, p2, deltabase, cs |
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212 |
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213 def deltachunk(self, prevnode): |
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214 l = self.chunklength() |
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215 if not l: |
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216 return {} |
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217 headerdata = readexactly(self._stream, self.deltaheadersize) |
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218 header = struct.unpack(self.deltaheader, headerdata) |
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219 delta = readexactly(self._stream, l - self.deltaheadersize) |
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220 node, p1, p2, deltabase, cs = self._deltaheader(header, prevnode) |
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221 return {'node': node, 'p1': p1, 'p2': p2, 'cs': cs, |
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222 'deltabase': deltabase, 'delta': delta} |
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223 |
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224 def getchunks(self): |
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225 """returns all the chunks contains in the bundle |
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226 |
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227 Used when you need to forward the binary stream to a file or another |
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228 network API. To do so, it parse the changegroup data, otherwise it will |
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229 block in case of sshrepo because it don't know the end of the stream. |
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230 """ |
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231 # an empty chunkgroup is the end of the changegroup |
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232 # a changegroup has at least 2 chunkgroups (changelog and manifest). |
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233 # after that, an empty chunkgroup is the end of the changegroup |
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234 empty = False |
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235 count = 0 |
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236 while not empty or count <= 2: |
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237 empty = True |
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238 count += 1 |
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239 while True: |
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240 chunk = getchunk(self) |
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241 if not chunk: |
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242 break |
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243 empty = False |
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244 yield chunkheader(len(chunk)) |
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245 pos = 0 |
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246 while pos < len(chunk): |
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247 next = pos + 2**20 |
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248 yield chunk[pos:next] |
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249 pos = next |
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250 yield closechunk() |
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251 |
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252 class cg2unpacker(cg1unpacker): |
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253 deltaheader = _CHANGEGROUPV2_DELTA_HEADER |
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254 deltaheadersize = struct.calcsize(deltaheader) |
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255 version = '02' |
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256 |
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257 def _deltaheader(self, headertuple, prevnode): |
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258 node, p1, p2, deltabase, cs = headertuple |
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259 return node, p1, p2, deltabase, cs |
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260 |
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261 class headerlessfixup(object): |
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262 def __init__(self, fh, h): |
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263 self._h = h |
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264 self._fh = fh |
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265 def read(self, n): |
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266 if self._h: |
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267 d, self._h = self._h[:n], self._h[n:] |
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268 if len(d) < n: |
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269 d += readexactly(self._fh, n - len(d)) |
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270 return d |
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271 return readexactly(self._fh, n) |
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272 |
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273 class cg1packer(object): |
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274 deltaheader = _CHANGEGROUPV1_DELTA_HEADER |
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275 version = '01' |
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276 def __init__(self, repo, bundlecaps=None): |
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277 """Given a source repo, construct a bundler. |
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278 |
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279 bundlecaps is optional and can be used to specify the set of |
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280 capabilities which can be used to build the bundle. |
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281 """ |
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282 # Set of capabilities we can use to build the bundle. |
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283 if bundlecaps is None: |
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284 bundlecaps = set() |
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285 self._bundlecaps = bundlecaps |
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286 self._changelog = repo.changelog |
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287 self._manifest = repo.manifest |
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288 reorder = repo.ui.config('bundle', 'reorder', 'auto') |
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289 if reorder == 'auto': |
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290 reorder = None |
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291 else: |
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292 reorder = util.parsebool(reorder) |
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293 self._repo = repo |
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294 self._reorder = reorder |
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295 self._progress = repo.ui.progress |
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296 if self._repo.ui.verbose and not self._repo.ui.debugflag: |
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297 self._verbosenote = self._repo.ui.note |
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298 else: |
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299 self._verbosenote = lambda s: None |
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300 |
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301 def close(self): |
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302 return closechunk() |
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303 |
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304 def fileheader(self, fname): |
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305 return chunkheader(len(fname)) + fname |
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306 |
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307 def group(self, nodelist, revlog, lookup, units=None): |
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308 """Calculate a delta group, yielding a sequence of changegroup chunks |
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309 (strings). |
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310 |
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311 Given a list of changeset revs, return a set of deltas and |
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312 metadata corresponding to nodes. The first delta is |
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313 first parent(nodelist[0]) -> nodelist[0], the receiver is |
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314 guaranteed to have this parent as it has all history before |
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315 these changesets. In the case firstparent is nullrev the |
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316 changegroup starts with a full revision. |
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317 |
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318 If units is not None, progress detail will be generated, units specifies |
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319 the type of revlog that is touched (changelog, manifest, etc.). |
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320 """ |
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321 # if we don't have any revisions touched by these changesets, bail |
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322 if len(nodelist) == 0: |
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323 yield self.close() |
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324 return |
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325 |
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326 # for generaldelta revlogs, we linearize the revs; this will both be |
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327 # much quicker and generate a much smaller bundle |
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328 if (revlog._generaldelta and self._reorder is None) or self._reorder: |
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329 dag = dagutil.revlogdag(revlog) |
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330 revs = set(revlog.rev(n) for n in nodelist) |
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331 revs = dag.linearize(revs) |
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332 else: |
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333 revs = sorted([revlog.rev(n) for n in nodelist]) |
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334 |
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335 # add the parent of the first rev |
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336 p = revlog.parentrevs(revs[0])[0] |
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337 revs.insert(0, p) |
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338 |
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339 # build deltas |
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340 total = len(revs) - 1 |
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341 msgbundling = _('bundling') |
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342 for r in xrange(len(revs) - 1): |
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343 if units is not None: |
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344 self._progress(msgbundling, r + 1, unit=units, total=total) |
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345 prev, curr = revs[r], revs[r + 1] |
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346 linknode = lookup(revlog.node(curr)) |
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347 for c in self.revchunk(revlog, curr, prev, linknode): |
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348 yield c |
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349 |
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350 if units is not None: |
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351 self._progress(msgbundling, None) |
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352 yield self.close() |
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353 |
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354 # filter any nodes that claim to be part of the known set |
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355 def prune(self, revlog, missing, commonrevs): |
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356 rr, rl = revlog.rev, revlog.linkrev |
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357 return [n for n in missing if rl(rr(n)) not in commonrevs] |
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358 |
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359 def generate(self, commonrevs, clnodes, fastpathlinkrev, source): |
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360 '''yield a sequence of changegroup chunks (strings)''' |
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361 repo = self._repo |
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362 cl = self._changelog |
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363 ml = self._manifest |
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364 reorder = self._reorder |
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365 |
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366 clrevorder = {} |
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367 mfs = {} # needed manifests |
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368 fnodes = {} # needed file nodes |
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369 changedfiles = set() |
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370 |
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371 # Callback for the changelog, used to collect changed files and manifest |
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372 # nodes. |
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373 # Returns the linkrev node (identity in the changelog case). |
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374 def lookupcl(x): |
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375 c = cl.read(x) |
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376 clrevorder[x] = len(clrevorder) |
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377 changedfiles.update(c[3]) |
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378 # record the first changeset introducing this manifest version |
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379 mfs.setdefault(c[0], x) |
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380 return x |
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|
381 |
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382 self._verbosenote(_('uncompressed size of bundle content:\n')) |
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383 size = 0 |
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384 for chunk in self.group(clnodes, cl, lookupcl, units=_('changesets')): |
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385 size += len(chunk) |
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386 yield chunk |
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387 self._verbosenote(_('%8.i (changelog)\n') % size) |
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388 |
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389 # Callback for the manifest, used to collect linkrevs for filelog |
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390 # revisions. |
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391 # Returns the linkrev node (collected in lookupcl). |
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392 def lookupmf(x): |
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393 clnode = mfs[x] |
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394 if not fastpathlinkrev or reorder: |
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395 mdata = ml.readfast(x) |
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396 for f, n in mdata.iteritems(): |
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397 if f in changedfiles: |
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398 # record the first changeset introducing this filelog |
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|
399 # version |
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400 fclnodes = fnodes.setdefault(f, {}) |
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401 fclnode = fclnodes.setdefault(n, clnode) |
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402 if clrevorder[clnode] < clrevorder[fclnode]: |
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|
403 fclnodes[n] = clnode |
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|
404 return clnode |
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|
405 |
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406 mfnodes = self.prune(ml, mfs, commonrevs) |
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|
407 size = 0 |
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|
408 for chunk in self.group(mfnodes, ml, lookupmf, units=_('manifests')): |
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409 size += len(chunk) |
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410 yield chunk |
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|
411 self._verbosenote(_('%8.i (manifests)\n') % size) |
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|
412 |
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|
413 mfs.clear() |
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414 clrevs = set(cl.rev(x) for x in clnodes) |
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|
415 |
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|
416 def linknodes(filerevlog, fname): |
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|
417 if fastpathlinkrev and not reorder: |
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|
418 llr = filerevlog.linkrev |
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|
419 def genfilenodes(): |
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420 for r in filerevlog: |
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421 linkrev = llr(r) |
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|
422 if linkrev in clrevs: |
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423 yield filerevlog.node(r), cl.node(linkrev) |
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424 return dict(genfilenodes()) |
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425 return fnodes.get(fname, {}) |
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426 |
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427 for chunk in self.generatefiles(changedfiles, linknodes, commonrevs, |
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428 source): |
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429 yield chunk |
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430 |
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431 yield self.close() |
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432 |
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433 if clnodes: |
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|
434 repo.hook('outgoing', node=hex(clnodes[0]), source=source) |
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|
435 |
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|
436 # The 'source' parameter is useful for extensions |
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437 def generatefiles(self, changedfiles, linknodes, commonrevs, source): |
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438 repo = self._repo |
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|
439 progress = self._progress |
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440 msgbundling = _('bundling') |
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|
441 |
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442 total = len(changedfiles) |
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|
443 # for progress output |
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444 msgfiles = _('files') |
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445 for i, fname in enumerate(sorted(changedfiles)): |
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446 filerevlog = repo.file(fname) |
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447 if not filerevlog: |
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448 raise util.Abort(_("empty or missing revlog for %s") % fname) |
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449 |
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450 linkrevnodes = linknodes(filerevlog, fname) |
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451 # Lookup for filenodes, we collected the linkrev nodes above in the |
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452 # fastpath case and with lookupmf in the slowpath case. |
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|
453 def lookupfilelog(x): |
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454 return linkrevnodes[x] |
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diff
changeset
|
455 |
24896
9183cb6886ef
changegroup: removed unused 'source' parameter from prune()
Martin von Zweigbergk <martinvonz@google.com>
parents:
24717
diff
changeset
|
456 filenodes = self.prune(filerevlog, linkrevnodes, commonrevs) |
19206
6308896b1d4a
bundle-ng: simplify bundle10.generate
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diff
changeset
|
457 if filenodes: |
19208
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bundle-ng: move progress handling out of the linkrev callback
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diff
changeset
|
458 progress(msgbundling, i + 1, item=fname, unit=msgfiles, |
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diff
changeset
|
459 total=total) |
23748
4ab66de46a96
bundle: when verbose, show what takes up the space in the generated bundle
Mads Kiilerich <madski@unity3d.com>
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diff
changeset
|
460 h = self.fileheader(fname) |
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461 size = len(h) |
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|
462 yield h |
24912
e285b98c65cc
changegroup.group: drop 'reorder' parameter
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parents:
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diff
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|
463 for chunk in self.group(filenodes, filerevlog, lookupfilelog): |
23748
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464 size += len(chunk) |
19202
0455fc94ae00
bundle-ng: move gengroup into bundler, pass repo object to bundler
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465 yield chunk |
23748
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diff
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|
466 self._verbosenote(_('%8.i %s\n') % (size, fname)) |
24901
e9edd53770fb
changegroup: close progress in same function as it's started
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parents:
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|
467 progress(msgbundling, None) |
19200
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bundle-ng: move group into the bundler
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|
468 |
23181
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469 def deltaparent(self, revlog, rev, p1, p2, prev): |
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470 return prev |
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|
471 |
19207
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472 def revchunk(self, revlog, rev, prev, linknode): |
14143
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473 node = revlog.node(rev) |
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474 p1, p2 = revlog.parentrevs(rev) |
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475 base = self.deltaparent(revlog, rev, p1, p2, prev) |
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|
476 |
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477 prefix = '' |
24190
903c7e8c97ad
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Mike Edgar <adgar@google.com>
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|
478 if revlog.iscensored(base) or revlog.iscensored(rev): |
903c7e8c97ad
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479 try: |
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480 delta = revlog.revision(node) |
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481 except error.CensoredNodeError, e: |
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diff
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|
482 delta = e.tombstone |
903c7e8c97ad
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diff
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|
483 if base == nullrev: |
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|
484 prefix = mdiff.trivialdiffheader(len(delta)) |
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diff
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|
485 else: |
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|
486 baselen = revlog.rawsize(base) |
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|
487 prefix = mdiff.replacediffheader(baselen, len(delta)) |
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|
488 elif base == nullrev: |
14143
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489 delta = revlog.revision(node) |
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|
490 prefix = mdiff.trivialdiffheader(len(delta)) |
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|
491 else: |
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|
492 delta = revlog.revdiff(base, rev) |
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|
493 p1n, p2n = revlog.parents(node) |
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|
494 basenode = revlog.node(base) |
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|
495 meta = self.builddeltaheader(node, p1n, p2n, basenode, linknode) |
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|
496 meta += prefix |
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|
497 l = len(meta) + len(delta) |
13831
d69c9510d648
changegroup: introduce bundler objects
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
498 yield chunkheader(l) |
d69c9510d648
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diff
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|
499 yield meta |
14143
da635d3c5620
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diff
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|
500 yield delta |
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|
501 def builddeltaheader(self, node, p1n, p2n, basenode, linknode): |
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|
502 # do nothing with basenode, it is implicitly the previous one in HG10 |
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|
503 return struct.pack(self.deltaheader, node, p1n, p2n, linknode) |
20925
5174c48ed8d8
localrepo: move the _changegroupsubset method in changegroup module
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diff
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|
504 |
23181
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|
505 class cg2packer(cg1packer): |
23896
becfecaf9087
changegroup.writebundle: HG2Y support
Eric Sumner <ericsumner@fb.com>
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diff
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|
506 version = '02' |
23181
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507 deltaheader = _CHANGEGROUPV2_DELTA_HEADER |
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|
508 |
24911
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
509 def __init__(self, repo, bundlecaps=None): |
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
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diff
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|
510 super(cg2packer, self).__init__(repo, bundlecaps) |
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
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diff
changeset
|
511 if self._reorder is None: |
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
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diff
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|
512 # Since generaldelta is directly supported by cg2, reordering |
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
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parents:
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diff
changeset
|
513 # generally doesn't help, so we disable it by default (treating |
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
514 # bundle.reorder=auto just like bundle.reorder=False). |
5447b8523fef
cg2packer: set reorder=False in __init__ instead of in group()
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|
515 self._reorder = False |
23181
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|
516 |
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|
517 def deltaparent(self, revlog, rev, p1, p2, prev): |
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|
518 dp = revlog.deltaparent(rev) |
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|
519 # avoid storing full revisions; pick prev in those cases |
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|
520 # also pick prev when we can't be sure remote has dp |
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|
521 if dp == nullrev or (dp != p1 and dp != p2 and dp != prev): |
832b7ef275c8
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|
522 return prev |
832b7ef275c8
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diff
changeset
|
523 return dp |
832b7ef275c8
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parents:
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diff
changeset
|
524 |
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changeset
|
525 def builddeltaheader(self, node, p1n, p2n, basenode, linknode): |
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526 return struct.pack(self.deltaheader, node, p1n, p2n, basenode, linknode) |
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|
527 |
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|
528 packermap = {'01': (cg1packer, cg1unpacker), |
832b7ef275c8
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|
529 '02': (cg2packer, cg2unpacker)} |
23168
a92ba36a1a9d
changegroup: add a "packermap" dictionary to track different packer versions
Pierre-Yves David <pierre-yves.david@fb.com>
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22971
diff
changeset
|
530 |
20926
7c1ed40e3325
localrepo: move the changegroupinfo method in changegroup module
Pierre-Yves David <pierre-yves.david@fb.com>
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20925
diff
changeset
|
531 def _changegroupinfo(repo, nodes, source): |
7c1ed40e3325
localrepo: move the changegroupinfo method in changegroup module
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diff
changeset
|
532 if repo.ui.verbose or source == 'bundle': |
7c1ed40e3325
localrepo: move the changegroupinfo method in changegroup module
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diff
changeset
|
533 repo.ui.status(_("%d changesets found\n") % len(nodes)) |
7c1ed40e3325
localrepo: move the changegroupinfo method in changegroup module
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diff
changeset
|
534 if repo.ui.debugflag: |
7c1ed40e3325
localrepo: move the changegroupinfo method in changegroup module
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diff
changeset
|
535 repo.ui.debug("list of changesets:\n") |
7c1ed40e3325
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diff
changeset
|
536 for node in nodes: |
7c1ed40e3325
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diff
changeset
|
537 repo.ui.debug("%s\n" % hex(node)) |
7c1ed40e3325
localrepo: move the changegroupinfo method in changegroup module
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diff
changeset
|
538 |
23177
706547a14b8b
changegroup: introduce "raw" versions of some commands
Sune Foldager <cryo@cyanite.org>
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diff
changeset
|
539 def getsubsetraw(repo, outgoing, bundler, source, fastpath=False): |
20925
5174c48ed8d8
localrepo: move the _changegroupsubset method in changegroup module
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diff
changeset
|
540 repo = repo.unfiltered() |
5174c48ed8d8
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diff
changeset
|
541 commonrevs = outgoing.common |
5174c48ed8d8
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diff
changeset
|
542 csets = outgoing.missing |
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diff
changeset
|
543 heads = outgoing.missingheads |
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diff
changeset
|
544 # We go through the fast path if we get told to, or if all (unfiltered |
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diff
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|
545 # heads have been requested (since we then know there all linkrevs will |
5174c48ed8d8
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diff
changeset
|
546 # be pulled by the client). |
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changeset
|
547 heads.sort() |
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changeset
|
548 fastpathlinkrev = fastpath or ( |
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changeset
|
549 repo.filtername is None and heads == sorted(repo.heads())) |
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diff
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|
550 |
5174c48ed8d8
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diff
changeset
|
551 repo.hook('preoutgoing', throw=True, source=source) |
20926
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changeset
|
552 _changegroupinfo(repo, csets, source) |
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|
553 return bundler.generate(commonrevs, csets, fastpathlinkrev, source) |
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changeset
|
554 |
23897
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diff
changeset
|
555 def getsubset(repo, outgoing, bundler, source, fastpath=False, version='01'): |
23177
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|
556 gengroup = getsubsetraw(repo, outgoing, bundler, source, fastpath) |
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changeset
|
557 return packermap[version][1](util.chunkbuffer(gengroup), 'UN') |
20927
24a443948627
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parents:
20926
diff
changeset
|
558 |
23897
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Eric Sumner <ericsumner@fb.com>
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changeset
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559 def changegroupsubset(repo, roots, heads, source, version='01'): |
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560 """Compute a changegroup consisting of all the nodes that are |
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561 descendants of any of the roots and ancestors of any of the heads. |
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562 Return a chunkbuffer object whose read() method will return |
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563 successive changegroup chunks. |
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564 |
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565 It is fairly complex as determining which filenodes and which |
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566 manifest nodes need to be included for the changeset to be complete |
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567 is non-trivial. |
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568 |
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569 Another wrinkle is doing the reverse, figuring out which changeset in |
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570 the changegroup a particular filenode or manifestnode belongs to. |
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571 """ |
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572 cl = repo.changelog |
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573 if not roots: |
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574 roots = [nullid] |
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575 # TODO: remove call to nodesbetween. |
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576 csets, roots, heads = cl.nodesbetween(roots, heads) |
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577 discbases = [] |
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578 for n in roots: |
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579 discbases.extend([p for p in cl.parents(n) if p != nullid]) |
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580 outgoing = discovery.outgoing(cl, discbases, heads) |
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581 bundler = packermap[version][0](repo) |
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582 return getsubset(repo, outgoing, bundler, source, version=version) |
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583 |
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584 def getlocalchangegroupraw(repo, source, outgoing, bundlecaps=None, |
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585 version='01'): |
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586 """Like getbundle, but taking a discovery.outgoing as an argument. |
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587 |
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588 This is only implemented for local repos and reuses potentially |
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589 precomputed sets in outgoing. Returns a raw changegroup generator.""" |
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590 if not outgoing.missing: |
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591 return None |
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592 bundler = packermap[version][0](repo, bundlecaps) |
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593 return getsubsetraw(repo, outgoing, bundler, source) |
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594 |
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595 def getlocalchangegroup(repo, source, outgoing, bundlecaps=None): |
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596 """Like getbundle, but taking a discovery.outgoing as an argument. |
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597 |
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598 This is only implemented for local repos and reuses potentially |
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599 precomputed sets in outgoing.""" |
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600 if not outgoing.missing: |
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601 return None |
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602 bundler = cg1packer(repo, bundlecaps) |
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603 return getsubset(repo, outgoing, bundler, source) |
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604 |
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605 def _computeoutgoing(repo, heads, common): |
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606 """Computes which revs are outgoing given a set of common |
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607 and a set of heads. |
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608 |
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609 This is a separate function so extensions can have access to |
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610 the logic. |
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611 |
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612 Returns a discovery.outgoing object. |
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613 """ |
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614 cl = repo.changelog |
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615 if common: |
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616 hasnode = cl.hasnode |
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617 common = [n for n in common if hasnode(n)] |
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618 else: |
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619 common = [nullid] |
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620 if not heads: |
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621 heads = cl.heads() |
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622 return discovery.outgoing(cl, common, heads) |
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623 |
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624 def getchangegroupraw(repo, source, heads=None, common=None, bundlecaps=None, |
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625 version='01'): |
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626 """Like changegroupsubset, but returns the set difference between the |
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627 ancestors of heads and the ancestors common. |
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628 |
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629 If heads is None, use the local heads. If common is None, use [nullid]. |
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630 |
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631 If version is None, use a version '1' changegroup. |
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632 |
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633 The nodes in common might not all be known locally due to the way the |
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634 current discovery protocol works. Returns a raw changegroup generator. |
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635 """ |
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636 outgoing = _computeoutgoing(repo, heads, common) |
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637 return getlocalchangegroupraw(repo, source, outgoing, bundlecaps=bundlecaps, |
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638 version=version) |
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639 |
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640 def getchangegroup(repo, source, heads=None, common=None, bundlecaps=None): |
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641 """Like changegroupsubset, but returns the set difference between the |
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642 ancestors of heads and the ancestors common. |
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643 |
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644 If heads is None, use the local heads. If common is None, use [nullid]. |
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645 |
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646 The nodes in common might not all be known locally due to the way the |
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647 current discovery protocol works. |
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648 """ |
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649 outgoing = _computeoutgoing(repo, heads, common) |
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650 return getlocalchangegroup(repo, source, outgoing, bundlecaps=bundlecaps) |
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651 |
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652 def changegroup(repo, basenodes, source): |
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653 # to avoid a race we use changegroupsubset() (issue1320) |
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654 return changegroupsubset(repo, basenodes, repo.heads(), source) |
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655 |
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656 def addchangegroupfiles(repo, source, revmap, trp, pr, needfiles): |
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657 revisions = 0 |
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658 files = 0 |
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659 while True: |
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660 chunkdata = source.filelogheader() |
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661 if not chunkdata: |
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662 break |
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663 f = chunkdata["filename"] |
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664 repo.ui.debug("adding %s revisions\n" % f) |
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665 pr() |
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666 fl = repo.file(f) |
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667 o = len(fl) |
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668 try: |
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669 if not fl.addgroup(source, revmap, trp): |
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670 raise util.Abort(_("received file revlog group is empty")) |
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671 except error.CensoredBaseError, e: |
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672 raise util.Abort(_("received delta base is censored: %s") % e) |
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673 revisions += len(fl) - o |
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674 files += 1 |
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675 if f in needfiles: |
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676 needs = needfiles[f] |
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677 for new in xrange(o, len(fl)): |
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678 n = fl.node(new) |
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679 if n in needs: |
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680 needs.remove(n) |
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681 else: |
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682 raise util.Abort( |
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683 _("received spurious file revlog entry")) |
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684 if not needs: |
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685 del needfiles[f] |
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686 repo.ui.progress(_('files'), None) |
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687 |
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688 for f, needs in needfiles.iteritems(): |
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689 fl = repo.file(f) |
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690 for n in needs: |
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691 try: |
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692 fl.rev(n) |
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693 except error.LookupError: |
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694 raise util.Abort( |
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695 _('missing file data for %s:%s - run hg verify') % |
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696 (f, hex(n))) |
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697 |
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698 return revisions, files |
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699 |
22041
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700 def addchangegroup(repo, source, srctype, url, emptyok=False, |
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701 targetphase=phases.draft): |
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702 """Add the changegroup returned by source.read() to this repo. |
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703 srctype is a string like 'push', 'pull', or 'unbundle'. url is |
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704 the URL of the repo where this changegroup is coming from. |
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705 |
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706 Return an integer summarizing the change to this repo: |
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707 - nothing changed or no source: 0 |
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708 - more heads than before: 1+added heads (2..n) |
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709 - fewer heads than before: -1-removed heads (-2..-n) |
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710 - number of heads stays the same: 1 |
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711 """ |
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712 repo = repo.unfiltered() |
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713 def csmap(x): |
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714 repo.ui.debug("add changeset %s\n" % short(x)) |
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715 return len(cl) |
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716 |
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717 def revmap(x): |
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718 return cl.rev(x) |
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719 |
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720 if not source: |
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721 return 0 |
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722 |
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|
723 changesets = files = revisions = 0 |
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724 efiles = set() |
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|
725 |
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|
726 tr = repo.transaction("\n".join([srctype, util.hidepassword(url)])) |
22971
3fe571c74b27
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diff
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|
727 # The transaction could have been created before and already carries source |
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|
728 # information. In this case we use the top level data. We overwrite the |
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|
729 # argument because we need to use the top level value (if they exist) in |
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|
730 # this function. |
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|
731 srctype = tr.hookargs.setdefault('source', srctype) |
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|
732 url = tr.hookargs.setdefault('url', url) |
23203
3872d563e01a
changelog: handle writepending in the transaction
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23181
diff
changeset
|
733 |
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diff
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|
734 # write changelog data to temp files so concurrent readers will not see |
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|
735 # inconsistent view |
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|
736 cl = repo.changelog |
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|
737 cl.delayupdate(tr) |
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|
738 oldheads = cl.heads() |
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|
739 try: |
22971
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diff
changeset
|
740 repo.hook('prechangegroup', throw=True, **tr.hookargs) |
22969
805c18b27f48
addchangegroup: call `prechangegroup` hook after transaction retrieval
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22968
diff
changeset
|
741 |
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|
742 trp = weakref.proxy(tr) |
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|
743 # pull off the changeset group |
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|
744 repo.ui.status(_("adding changesets\n")) |
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|
745 clstart = len(cl) |
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|
746 class prog(object): |
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|
747 step = _('changesets') |
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748 count = 1 |
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|
749 ui = repo.ui |
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|
750 total = None |
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|
751 def __call__(repo): |
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752 repo.ui.progress(repo.step, repo.count, unit=_('chunks'), |
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|
753 total=repo.total) |
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|
754 repo.count += 1 |
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|
755 pr = prog() |
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|
756 source.callback = pr |
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|
757 |
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|
758 source.changelogheader() |
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|
759 srccontent = cl.addgroup(source, csmap, trp) |
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|
760 if not (srccontent or emptyok): |
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|
761 raise util.Abort(_("received changelog group is empty")) |
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|
762 clend = len(cl) |
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|
763 changesets = clend - clstart |
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|
764 for c in xrange(clstart, clend): |
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|
765 efiles.update(repo[c].files()) |
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|
766 efiles = len(efiles) |
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767 repo.ui.progress(_('changesets'), None) |
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|
768 |
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|
769 # pull off the manifest group |
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|
770 repo.ui.status(_("adding manifests\n")) |
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|
771 pr.step = _('manifests') |
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|
772 pr.count = 1 |
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changeset
|
773 pr.total = changesets # manifests <= changesets |
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774 # no need to check for empty manifest group here: |
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775 # if the result of the merge of 1 and 2 is the same in 3 and 4, |
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776 # no new manifest will be created and the manifest group will |
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777 # be empty during the pull |
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778 source.manifestheader() |
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779 repo.manifest.addgroup(source, revmap, trp) |
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780 repo.ui.progress(_('manifests'), None) |
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781 |
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782 needfiles = {} |
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783 if repo.ui.configbool('server', 'validate', default=False): |
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784 # validate incoming csets have their manifests |
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785 for cset in xrange(clstart, clend): |
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786 mfnode = repo.changelog.read(repo.changelog.node(cset))[0] |
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787 mfest = repo.manifest.readdelta(mfnode) |
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788 # store file nodes we must see |
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789 for f, n in mfest.iteritems(): |
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790 needfiles.setdefault(f, set()).add(n) |
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791 |
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792 # process the files |
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793 repo.ui.status(_("adding file changes\n")) |
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794 pr.step = _('files') |
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795 pr.count = 1 |
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796 pr.total = efiles |
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797 source.callback = None |
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798 |
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799 newrevs, newfiles = addchangegroupfiles(repo, source, revmap, trp, pr, |
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800 needfiles) |
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801 revisions += newrevs |
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802 files += newfiles |
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803 |
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804 dh = 0 |
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805 if oldheads: |
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806 heads = cl.heads() |
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807 dh = len(heads) - len(oldheads) |
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808 for h in heads: |
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809 if h not in oldheads and repo[h].closesbranch(): |
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810 dh -= 1 |
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811 htext = "" |
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812 if dh: |
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813 htext = _(" (%+d heads)") % dh |
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814 |
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815 repo.ui.status(_("added %d changesets" |
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816 " with %d changes to %d files%s\n") |
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817 % (changesets, revisions, files, htext)) |
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818 repo.invalidatevolatilesets() |
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819 |
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820 if changesets > 0: |
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821 p = lambda: tr.writepending() and repo.root or "" |
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822 if 'node' not in tr.hookargs: |
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823 tr.hookargs['node'] = hex(cl.node(clstart)) |
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824 hookargs = dict(tr.hookargs) |
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825 else: |
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826 hookargs = dict(tr.hookargs) |
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827 hookargs['node'] = hex(cl.node(clstart)) |
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828 repo.hook('pretxnchangegroup', throw=True, pending=p, **hookargs) |
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829 |
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830 added = [cl.node(r) for r in xrange(clstart, clend)] |
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831 publishing = repo.ui.configbool('phases', 'publish', True) |
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832 if srctype in ('push', 'serve'): |
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833 # Old servers can not push the boundary themselves. |
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834 # New servers won't push the boundary if changeset already |
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835 # exists locally as secret |
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836 # |
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837 # We should not use added here but the list of all change in |
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838 # the bundle |
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839 if publishing: |
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840 phases.advanceboundary(repo, tr, phases.public, srccontent) |
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841 else: |
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842 # Those changesets have been pushed from the outside, their |
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843 # phases are going to be pushed alongside. Therefor |
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844 # `targetphase` is ignored. |
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845 phases.advanceboundary(repo, tr, phases.draft, srccontent) |
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846 phases.retractboundary(repo, tr, phases.draft, added) |
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847 elif srctype != 'strip': |
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848 # publishing only alter behavior during push |
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849 # |
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850 # strip should not touch boundary at all |
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851 phases.retractboundary(repo, tr, targetphase, added) |
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852 |
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853 if changesets > 0: |
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854 if srctype != 'strip': |
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855 # During strip, branchcache is invalid but coming call to |
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856 # `destroyed` will repair it. |
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857 # In other case we can safely update cache on disk. |
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858 branchmap.updatecache(repo.filtered('served')) |
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859 |
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860 def runhooks(): |
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861 # These hooks run when the lock releases, not when the |
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862 # transaction closes. So it's possible for the changelog |
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863 # to have changed since we last saw it. |
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864 if clstart >= len(repo): |
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865 return |
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866 |
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867 # forcefully update the on-disk branch cache |
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868 repo.ui.debug("updating the branch cache\n") |
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869 repo.hook("changegroup", **hookargs) |
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870 |
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871 for n in added: |
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872 args = hookargs.copy() |
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873 args['node'] = hex(n) |
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|
874 repo.hook("incoming", **args) |
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|
875 |
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876 newheads = [h for h in repo.heads() if h not in oldheads] |
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877 repo.ui.log("incoming", |
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878 "%s incoming changes - new heads: %s\n", |
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879 len(added), |
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880 ', '.join([hex(c[:6]) for c in newheads])) |
23221
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changegroup: use the 'postclose' API on transaction
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881 |
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changegroup: use the 'postclose' API on transaction
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882 tr.addpostclose('changegroup-runhooks-%020i' % clstart, |
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transaction: pass the transaction to 'postclose' callback
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883 lambda tr: repo._afterlock(runhooks)) |
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884 |
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885 tr.close() |
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886 |
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887 finally: |
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888 tr.release() |
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changegroup: flush the ui stdio buffers after adding a changegroup
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889 repo.ui.flush() |
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890 # never return 0 here: |
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891 if dh < 0: |
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892 return dh - 1 |
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893 else: |
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894 return dh + 1 |