Mercurial > hg
annotate mercurial/wireproto.py @ 11791:00cde9bddbe4
repair: do not compress partial bundle if we do not keep it on disk
A partial bundle is created to temporarily save revisions > rev but
not descending from the node to strip, to be able to restore the
changesets after stripping the changelog.
Since this bundle is not kept after the strip operation, and is not
user-visible, it is not necessary and should be faster to avoid
compression.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
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date | Thu, 12 Aug 2010 16:53:23 +0900 |
parents | 04f76a954842 |
children | 4e804302d30c |
rev | line source |
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1 # wireproto.py - generic wire protocol support functions |
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2 # |
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3 # Copyright 2005-2010 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 |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import urllib, tempfile, os |
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9 from i18n import _ |
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10 from node import bin, hex |
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11 import changegroup as changegroupmod |
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12 import repo, error, encoding, util, store |
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13 import pushkey as pushkey_ |
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14 |
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15 # list of nodes encoding / decoding |
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16 |
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17 def decodelist(l, sep=' '): |
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18 return map(bin, l.split(sep)) |
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19 |
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20 def encodelist(l, sep=' '): |
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21 return sep.join(map(hex, l)) |
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22 |
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23 # client side |
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24 |
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25 class wirerepository(repo.repository): |
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26 def lookup(self, key): |
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27 self.requirecap('lookup', _('look up remote revision')) |
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28 d = self._call("lookup", key=key) |
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29 success, data = d[:-1].split(" ", 1) |
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30 if int(success): |
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31 return bin(data) |
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32 self._abort(error.RepoError(data)) |
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33 |
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34 def heads(self): |
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35 d = self._call("heads") |
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36 try: |
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37 return decodelist(d[:-1]) |
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38 except: |
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39 self.abort(error.ResponseError(_("unexpected response:"), d)) |
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40 |
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41 def branchmap(self): |
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42 d = self._call("branchmap") |
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43 try: |
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44 branchmap = {} |
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45 for branchpart in d.splitlines(): |
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46 branchname, branchheads = branchpart.split(' ', 1) |
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47 branchname = urllib.unquote(branchname) |
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48 # Earlier servers (1.3.x) send branch names in (their) local |
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49 # charset. The best we can do is assume it's identical to our |
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50 # own local charset, in case it's not utf-8. |
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51 try: |
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52 branchname.decode('utf-8') |
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53 except UnicodeDecodeError: |
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54 branchname = encoding.fromlocal(branchname) |
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55 branchheads = decodelist(branchheads) |
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56 branchmap[branchname] = branchheads |
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57 return branchmap |
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58 except TypeError: |
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59 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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60 |
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61 def branches(self, nodes): |
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62 n = encodelist(nodes) |
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63 d = self._call("branches", nodes=n) |
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64 try: |
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65 br = [tuple(decodelist(b)) for b in d.splitlines()] |
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66 return br |
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67 except: |
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68 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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69 |
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70 def between(self, pairs): |
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71 batch = 8 # avoid giant requests |
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72 r = [] |
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73 for i in xrange(0, len(pairs), batch): |
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74 n = " ".join([encodelist(p, '-') for p in pairs[i:i + batch]]) |
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75 d = self._call("between", pairs=n) |
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76 try: |
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77 r.extend(l and decodelist(l) or [] for l in d.splitlines()) |
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78 except: |
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79 self._abort(error.ResponseError(_("unexpected response:"), d)) |
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80 return r |
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81 |
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82 def pushkey(self, namespace, key, old, new): |
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83 if not self.capable('pushkey'): |
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84 return False |
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85 d = self._call("pushkey", |
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86 namespace=namespace, key=key, old=old, new=new) |
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87 return bool(int(d)) |
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88 |
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89 def listkeys(self, namespace): |
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90 if not self.capable('pushkey'): |
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91 return {} |
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92 d = self._call("listkeys", namespace=namespace) |
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93 r = {} |
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94 for l in d.splitlines(): |
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95 k, v = l.split('\t') |
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96 r[k.decode('string-escape')] = v.decode('string-escape') |
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97 return r |
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98 |
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99 def stream_out(self): |
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100 return self._callstream('stream_out') |
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101 |
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102 def changegroup(self, nodes, kind): |
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103 n = encodelist(nodes) |
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104 f = self._callstream("changegroup", roots=n) |
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105 return self._decompress(f) |
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106 |
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107 def changegroupsubset(self, bases, heads, kind): |
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108 self.requirecap('changegroupsubset', _('look up remote changes')) |
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109 bases = encodelist(bases) |
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110 heads = encodelist(heads) |
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111 return self._decompress(self._callstream("changegroupsubset", |
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112 bases=bases, heads=heads)) |
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113 |
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114 def unbundle(self, cg, heads, source): |
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115 '''Send cg (a readable file-like object representing the |
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116 changegroup to push, typically a chunkbuffer object) to the |
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117 remote server as a bundle. Return an integer indicating the |
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118 result of the push (see localrepository.addchangegroup()).''' |
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119 |
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120 ret, output = self._callpush("unbundle", cg, heads=encodelist(heads)) |
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121 if ret == "": |
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122 raise error.ResponseError( |
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123 _('push failed:'), output) |
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124 try: |
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125 ret = int(ret) |
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126 except ValueError, err: |
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127 raise error.ResponseError( |
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128 _('push failed (unexpected response):'), ret) |
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129 |
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130 for l in output.splitlines(True): |
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131 self.ui.status(_('remote: '), l) |
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132 return ret |
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133 |
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134 # server side |
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135 |
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136 class streamres(object): |
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137 def __init__(self, gen): |
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138 self.gen = gen |
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139 |
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140 class pushres(object): |
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141 def __init__(self, res): |
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142 self.res = res |
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143 |
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144 def dispatch(repo, proto, command): |
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145 func, spec = commands[command] |
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146 args = proto.getargs(spec) |
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147 return func(repo, proto, *args) |
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148 |
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149 def between(repo, proto, pairs): |
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150 pairs = [decodelist(p, '-') for p in pairs.split(" ")] |
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151 r = [] |
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152 for b in repo.between(pairs): |
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153 r.append(encodelist(b) + "\n") |
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154 return "".join(r) |
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155 |
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156 def branchmap(repo, proto): |
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157 branchmap = repo.branchmap() |
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158 heads = [] |
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159 for branch, nodes in branchmap.iteritems(): |
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160 branchname = urllib.quote(branch) |
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161 branchnodes = encodelist(nodes) |
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162 heads.append('%s %s' % (branchname, branchnodes)) |
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163 return '\n'.join(heads) |
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164 |
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165 def branches(repo, proto, nodes): |
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166 nodes = decodelist(nodes) |
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167 r = [] |
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168 for b in repo.branches(nodes): |
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169 r.append(encodelist(b) + "\n") |
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170 return "".join(r) |
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171 |
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172 def capabilities(repo, proto): |
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173 caps = 'lookup changegroupsubset branchmap pushkey'.split() |
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174 if _allowstream(repo.ui): |
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175 caps.append('stream=%d' % repo.changelog.version) |
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176 caps.append('unbundle=%s' % ','.join(changegroupmod.bundlepriority)) |
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177 return ' '.join(caps) |
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178 |
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179 def changegroup(repo, proto, roots): |
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180 nodes = decodelist(roots) |
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181 cg = repo.changegroup(nodes, 'serve') |
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182 return streamres(proto.groupchunks(cg)) |
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183 |
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184 def changegroupsubset(repo, proto, bases, heads): |
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185 bases = decodelist(bases) |
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186 heads = decodelist(heads) |
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187 cg = repo.changegroupsubset(bases, heads, 'serve') |
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188 return streamres(proto.groupchunks(cg)) |
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189 |
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190 def heads(repo, proto): |
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191 h = repo.heads() |
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192 return encodelist(h) + "\n" |
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193 |
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194 def hello(repo, proto): |
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195 '''the hello command returns a set of lines describing various |
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196 interesting things about the server, in an RFC822-like format. |
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197 Currently the only one defined is "capabilities", which |
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198 consists of a line in the form: |
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199 |
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200 capabilities: space separated list of tokens |
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201 ''' |
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202 return "capabilities: %s\n" % (capabilities(repo, proto)) |
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203 |
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204 def listkeys(repo, proto, namespace): |
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205 d = pushkey_.list(repo, namespace).items() |
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206 t = '\n'.join(['%s\t%s' % (k.encode('string-escape'), |
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207 v.encode('string-escape')) for k, v in d]) |
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208 return t |
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209 |
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210 def lookup(repo, proto, key): |
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211 try: |
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212 r = hex(repo.lookup(key)) |
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213 success = 1 |
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214 except Exception, inst: |
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215 r = str(inst) |
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216 success = 0 |
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217 return "%s %s\n" % (success, r) |
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218 |
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219 def pushkey(repo, proto, namespace, key, old, new): |
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220 r = pushkey_.push(repo, namespace, key, old, new) |
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221 return '%s\n' % int(r) |
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222 |
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223 def _allowstream(ui): |
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224 return ui.configbool('server', 'uncompressed', True, untrusted=True) |
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225 |
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226 def stream(repo, proto): |
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227 '''If the server supports streaming clone, it advertises the "stream" |
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228 capability with a value representing the version and flags of the repo |
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229 it is serving. Client checks to see if it understands the format. |
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230 |
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231 The format is simple: the server writes out a line with the amount |
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232 of files, then the total amount of bytes to be transfered (separated |
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233 by a space). Then, for each file, the server first writes the filename |
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234 and filesize (separated by the null character), then the file contents. |
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235 ''' |
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236 |
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237 if not _allowstream(repo.ui): |
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238 return '1\n' |
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239 |
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240 entries = [] |
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241 total_bytes = 0 |
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242 try: |
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243 # get consistent snapshot of repo, lock during scan |
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244 lock = repo.lock() |
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245 try: |
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246 repo.ui.debug('scanning\n') |
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247 for name, ename, size in repo.store.walk(): |
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248 entries.append((name, size)) |
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249 total_bytes += size |
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250 finally: |
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251 lock.release() |
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252 except error.LockError: |
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253 return '2\n' # error: 2 |
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254 |
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255 def streamer(repo, entries, total): |
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256 '''stream out all metadata files in repository.''' |
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257 yield '0\n' # success |
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258 repo.ui.debug('%d files, %d bytes to transfer\n' % |
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259 (len(entries), total_bytes)) |
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260 yield '%d %d\n' % (len(entries), total_bytes) |
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261 for name, size in entries: |
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262 repo.ui.debug('sending %s (%d bytes)\n' % (name, size)) |
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263 # partially encode name over the wire for backwards compat |
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264 yield '%s\0%d\n' % (store.encodedir(name), size) |
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265 for chunk in util.filechunkiter(repo.sopener(name), limit=size): |
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266 yield chunk |
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267 |
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268 return streamres(streamer(repo, entries, total_bytes)) |
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269 |
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270 def unbundle(repo, proto, heads): |
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271 their_heads = decodelist(heads) |
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272 |
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273 def check_heads(): |
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274 heads = repo.heads() |
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275 return their_heads == ['force'] or their_heads == heads |
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276 |
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277 # fail early if possible |
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278 if not check_heads(): |
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279 return 'unsynced changes' |
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280 |
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281 # write bundle data to temporary file because it can be big |
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282 fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-') |
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283 fp = os.fdopen(fd, 'wb+') |
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284 r = 0 |
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285 proto.redirect() |
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286 try: |
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287 proto.getfile(fp) |
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288 lock = repo.lock() |
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289 try: |
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290 if not check_heads(): |
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291 # someone else committed/pushed/unbundled while we |
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292 # were transferring data |
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293 return 'unsynced changes' |
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294 |
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295 # push can proceed |
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296 fp.seek(0) |
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297 header = fp.read(6) |
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298 if header.startswith('HG'): |
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299 if not header.startswith('HG10'): |
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300 raise ValueError('unknown bundle version') |
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301 elif header not in changegroupmod.bundletypes: |
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302 raise ValueError('unknown bundle compression type') |
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303 gen = changegroupmod.unbundle(header, fp) |
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304 |
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305 try: |
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306 r = repo.addchangegroup(gen, 'serve', proto._client(), |
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307 lock=lock) |
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308 except util.Abort, inst: |
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309 sys.stderr.write("abort: %s\n" % inst) |
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310 finally: |
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311 lock.release() |
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312 return pushres(r) |
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313 |
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314 finally: |
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315 fp.close() |
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316 os.unlink(tempname) |
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317 |
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318 commands = { |
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319 'between': (between, 'pairs'), |
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320 'branchmap': (branchmap, ''), |
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321 'branches': (branches, 'nodes'), |
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322 'capabilities': (capabilities, ''), |
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323 'changegroup': (changegroup, 'roots'), |
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324 'changegroupsubset': (changegroupsubset, 'bases heads'), |
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325 'heads': (heads, ''), |
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326 'hello': (hello, ''), |
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327 'listkeys': (listkeys, 'namespace'), |
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328 'lookup': (lookup, 'key'), |
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329 'pushkey': (pushkey, 'namespace key old new'), |
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330 'stream_out': (stream, ''), |
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331 'unbundle': (unbundle, 'heads'), |
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332 } |