Mercurial > hg
annotate mercurial/statichttprepo.py @ 46780:6266d19556ad
node: introduce nodeconstants class
In preparing for moving from SHA1 hashes to a modern hash function,
place nullid and other constant magic vules in a class. Provide the
active set of constants in the repository and push it down. Provide
nullid directly in strategic places like the repository as it is
accessed very often. This changeset introduces the API change, but not
the mechanical replacement of the node.py attributes itself.
Differential Revision: https://phab.mercurial-scm.org/D9750
author | Joerg Sonnenberger <joerg@bec.de> |
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date | Wed, 13 Jan 2021 16:14:58 +0100 |
parents | bc2519513ae0 |
children | d4ba4d51f85f |
rev | line source |
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1101 | 1 # statichttprepo.py - simple http repository class for mercurial |
2 # | |
3 # This provides read-only repo access to repositories exported via static http | |
4 # | |
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5 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
1101 | 6 # |
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7 # This software may be used and distributed according to the terms of the |
10263 | 8 # GNU General Public License version 2 or any later version. |
1101 | 9 |
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10 from __future__ import absolute_import |
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11 |
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12 import errno |
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13 |
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14 from .i18n import _ |
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15 from .node import sha1nodeconstants |
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16 from . import ( |
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17 branchmap, |
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18 changelog, |
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19 error, |
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20 localrepo, |
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21 manifest, |
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22 namespaces, |
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23 pathutil, |
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24 pycompat, |
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25 url, |
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26 util, |
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27 vfs as vfsmod, |
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28 ) |
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29 |
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30 urlerr = util.urlerr |
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31 urlreq = util.urlreq |
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32 |
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33 |
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34 class httprangereader(object): |
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35 def __init__(self, url, opener): |
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36 # we assume opener has HTTPRangeHandler |
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37 self.url = url |
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38 self.pos = 0 |
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39 self.opener = opener |
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40 self.name = url |
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41 |
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42 def __enter__(self): |
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43 return self |
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44 |
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45 def __exit__(self, exc_type, exc_value, traceback): |
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46 self.close() |
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47 |
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48 def seek(self, pos): |
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49 self.pos = pos |
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50 |
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51 def read(self, bytes=None): |
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52 req = urlreq.request(pycompat.strurl(self.url)) |
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53 end = b'' |
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54 if bytes: |
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55 end = self.pos + bytes - 1 |
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56 if self.pos or end: |
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57 req.add_header('Range', 'bytes=%d-%s' % (self.pos, end)) |
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58 |
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59 try: |
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60 f = self.opener.open(req) |
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61 data = f.read() |
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62 code = f.code |
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63 except urlerr.httperror as inst: |
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64 num = inst.code == 404 and errno.ENOENT or None |
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65 # Explicitly convert the exception to str as Py3 will try |
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66 # convert it to local encoding and with as the HTTPResponse |
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67 # instance doesn't support encode. |
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68 raise IOError(num, str(inst)) |
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69 except urlerr.urlerror as inst: |
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70 raise IOError(None, inst.reason) |
1101 | 71 |
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72 if code == 200: |
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73 # HTTPRangeHandler does nothing if remote does not support |
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74 # Range headers and returns the full entity. Let's slice it. |
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75 if bytes: |
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76 data = data[self.pos : self.pos + bytes] |
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77 else: |
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78 data = data[self.pos :] |
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79 elif bytes: |
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80 data = data[:bytes] |
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81 self.pos += len(data) |
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82 return data |
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83 |
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84 def readlines(self): |
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85 return self.read().splitlines(True) |
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86 |
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87 def __iter__(self): |
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88 return iter(self.readlines()) |
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89 |
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90 def close(self): |
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91 pass |
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92 |
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93 |
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94 # _RangeError and _HTTPRangeHandler were originally in byterange.py, |
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95 # which was itself extracted from urlgrabber. See the last version of |
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96 # byterange.py from history if you need more information. |
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97 class _RangeError(IOError): |
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98 """Error raised when an unsatisfiable range is requested.""" |
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99 |
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100 |
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101 class _HTTPRangeHandler(urlreq.basehandler): |
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102 """Handler that enables HTTP Range headers. |
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103 |
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104 This was extremely simple. The Range header is a HTTP feature to |
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105 begin with so all this class does is tell urllib2 that the |
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106 "206 Partial Content" response from the HTTP server is what we |
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107 expected. |
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108 """ |
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109 |
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110 def http_error_206(self, req, fp, code, msg, hdrs): |
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111 # 206 Partial Content Response |
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112 r = urlreq.addinfourl(fp, hdrs, req.get_full_url()) |
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113 r.code = code |
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114 r.msg = msg |
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115 return r |
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116 |
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117 def http_error_416(self, req, fp, code, msg, hdrs): |
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118 # HTTP's Range Not Satisfiable error |
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119 raise _RangeError(b'Requested Range Not Satisfiable') |
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120 |
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121 |
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122 def build_opener(ui, authinfo): |
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123 # urllib cannot handle URLs with embedded user or passwd |
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124 urlopener = url.opener(ui, authinfo) |
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125 urlopener.add_handler(_HTTPRangeHandler()) |
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126 |
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127 class statichttpvfs(vfsmod.abstractvfs): |
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128 def __init__(self, base): |
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129 self.base = base |
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130 self.options = {} |
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131 |
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132 def __call__(self, path, mode=b'r', *args, **kw): |
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133 if mode not in (b'r', b'rb'): |
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134 raise IOError(b'Permission denied') |
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135 f = b"/".join((self.base, urlreq.quote(path))) |
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136 return httprangereader(f, urlopener) |
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137 |
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138 def join(self, path): |
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139 if path: |
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140 return pathutil.join(self.base, path) |
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141 else: |
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142 return self.base |
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143 |
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144 return statichttpvfs |
1101 | 145 |
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146 |
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147 class statichttppeer(localrepo.localpeer): |
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148 def local(self): |
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149 return None |
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150 |
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151 def canpush(self): |
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152 return False |
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153 |
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154 |
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155 class statichttprepository( |
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156 localrepo.localrepository, localrepo.revlogfilestorage |
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157 ): |
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158 supported = localrepo.localrepository._basesupported |
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159 |
1101 | 160 def __init__(self, ui, path): |
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161 self._url = path |
1101 | 162 self.ui = ui |
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163 |
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164 self.root = path |
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165 u = util.url(path.rstrip(b'/') + b"/.hg") |
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166 self.path, authinfo = u.authinfo() |
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167 |
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168 vfsclass = build_opener(ui, authinfo) |
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169 self.vfs = vfsclass(self.path) |
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170 self.cachevfs = vfsclass(self.vfs.join(b'cache')) |
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171 self._phasedefaults = [] |
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172 |
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173 self.names = namespaces.namespaces() |
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174 self.filtername = None |
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175 self._extrafilterid = None |
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176 self._wanted_sidedata = set() |
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177 |
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178 try: |
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179 requirements = set(self.vfs.read(b'requires').splitlines()) |
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180 except IOError as inst: |
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181 if inst.errno != errno.ENOENT: |
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182 raise |
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183 requirements = set() |
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184 |
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185 # check if it is a non-empty old-style repository |
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186 try: |
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187 fp = self.vfs(b"00changelog.i") |
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188 fp.read(1) |
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189 fp.close() |
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190 except IOError as inst: |
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191 if inst.errno != errno.ENOENT: |
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192 raise |
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193 # we do not care about empty old-style repositories here |
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194 msg = _(b"'%s' does not appear to be an hg repository") % path |
7637 | 195 raise error.RepoError(msg) |
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196 |
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197 supportedrequirements = localrepo.gathersupportedrequirements(ui) |
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198 localrepo.ensurerequirementsrecognized( |
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199 requirements, supportedrequirements |
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200 ) |
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201 localrepo.ensurerequirementscompatible(ui, requirements) |
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202 self.nodeconstants = sha1nodeconstants |
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203 self.nullid = self.nodeconstants.nullid |
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204 |
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205 # setup store |
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206 self.store = localrepo.makestore(requirements, self.path, vfsclass) |
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207 self.spath = self.store.path |
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208 self.svfs = self.store.opener |
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209 self.sjoin = self.store.join |
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210 self._filecache = {} |
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211 self.requirements = requirements |
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212 |
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213 rootmanifest = manifest.manifestrevlog(self.nodeconstants, self.svfs) |
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214 self.manifestlog = manifest.manifestlog( |
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215 self.svfs, self, rootmanifest, self.narrowmatch() |
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216 ) |
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217 self.changelog = changelog.changelog(self.svfs) |
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218 self._tags = None |
1101 | 219 self.nodetagscache = None |
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220 self._branchcaches = branchmap.BranchMapCache() |
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221 self._revbranchcache = None |
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222 self.encodepats = None |
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223 self.decodepats = None |
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224 self._transref = None |
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225 |
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226 def _restrictcapabilities(self, caps): |
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227 caps = super(statichttprepository, self)._restrictcapabilities(caps) |
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228 return caps.difference([b"pushkey"]) |
1101 | 229 |
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230 def url(self): |
7211 | 231 return self._url |
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232 |
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234 return False | |
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235 |
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236 def peer(self): |
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237 return statichttppeer(self) |
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238 |
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239 def wlock(self, wait=True): |
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240 raise error.LockUnavailable( |
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241 0, |
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242 _(b'lock not available'), |
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243 b'lock', |
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244 _(b'cannot lock static-http repository'), |
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245 ) |
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246 |
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247 def lock(self, wait=True): |
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248 raise error.LockUnavailable( |
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249 0, |
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250 _(b'lock not available'), |
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251 b'lock', |
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252 _(b'cannot lock static-http repository'), |
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253 ) |
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254 |
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255 def _writecaches(self): |
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256 pass # statichttprepository are read only |
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257 |
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258 |
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259 def instance(ui, path, create, intents=None, createopts=None): |
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260 if create: |
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261 raise error.Abort(_(b'cannot create new static-http repository')) |
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262 return statichttprepository(ui, path[7:]) |