Mercurial > hg
annotate mercurial/wireproto.py @ 12044:bcc7139521b7
bundlerepo: remove duplication of bundle decompressors
author | Matt Mackall <mpm@selenic.com> |
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date | Wed, 25 Aug 2010 16:55:54 -0500 |
parents | 210049a8d16e |
children | 516b000fbb7e |
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, sys |
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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 gen = changegroupmod.readbundle(fp, None) |
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298 |
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299 try: |
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300 r = repo.addchangegroup(gen, 'serve', proto._client(), |
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301 lock=lock) |
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302 except util.Abort, inst: |
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303 sys.stderr.write("abort: %s\n" % inst) |
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304 finally: |
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305 lock.release() |
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306 return pushres(r) |
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307 |
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308 finally: |
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309 fp.close() |
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310 os.unlink(tempname) |
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311 |
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312 commands = { |
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313 'between': (between, 'pairs'), |
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314 'branchmap': (branchmap, ''), |
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315 'branches': (branches, 'nodes'), |
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316 'capabilities': (capabilities, ''), |
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317 'changegroup': (changegroup, 'roots'), |
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318 'changegroupsubset': (changegroupsubset, 'bases heads'), |
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319 'heads': (heads, ''), |
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320 'hello': (hello, ''), |
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321 'listkeys': (listkeys, 'namespace'), |
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322 'lookup': (lookup, 'key'), |
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323 'pushkey': (pushkey, 'namespace key old new'), |
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324 'stream_out': (stream, ''), |
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325 'unbundle': (unbundle, 'heads'), |
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326 } |