Mercurial > hg
annotate mercurial/statichttprepo.py @ 37047:fddcb51b5084
wireproto: define permissions-based routing of HTTPv2 wire protocol
Now that we have a scaffolding for serving version 2 of the HTTP
protocol, let's start implementing it.
A good place to start is URL routing and basic request processing
semantics. We can focus on content types, capabilities detect, etc
later.
Version 2 of the HTTP wire protocol encodes the needed permissions
of the request in the URL path. The reasons for this are documented
in the added documentation. In short, a) it makes it really easy and
fail proof for server administrators to implement path-based
authentication and b) it will enable clients to realize very early in
a server exchange that authentication will be required to complete
the operation. This latter point avoids all kinds of complexity and
problems, like dealing with Expect: 100-continue and clients finding
out later during `hg push` that they need to provide authentication.
This will avoid the current badness where clients send a full bundle,
get an HTTP 403, provide authentication, then retransmit the bundle.
In order to implement command checking, we needed to implement a
protocol handler for the new wire protocol. Our handler is just
small enough to run the code we've implemented.
Tests for the defined functionality have been added.
I very much want to refactor the permissions checking code and define
a better response format. But this can be done later. Nothing is
covered by backwards compatibility at this point.
Differential Revision: https://phab.mercurial-scm.org/D2836
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 19 Mar 2018 16:43:47 -0700 |
parents | 214f61abd865 |
children | 0664be4f0c1f |
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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 . import ( |
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16 changelog, |
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17 error, |
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18 localrepo, |
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19 manifest, |
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20 namespaces, |
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21 pathutil, |
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22 scmutil, |
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23 store, |
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24 url, |
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25 util, |
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26 vfs as vfsmod, |
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27 ) |
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28 |
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29 urlerr = util.urlerr |
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30 urlreq = util.urlreq |
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31 |
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32 class httprangereader(object): |
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33 def __init__(self, url, opener): |
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34 # we assume opener has HTTPRangeHandler |
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35 self.url = url |
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36 self.pos = 0 |
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37 self.opener = opener |
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38 self.name = url |
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39 |
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40 def __enter__(self): |
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41 return self |
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42 |
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43 def __exit__(self, exc_type, exc_value, traceback): |
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44 self.close() |
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45 |
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46 def seek(self, pos): |
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47 self.pos = pos |
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48 def read(self, bytes=None): |
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49 req = urlreq.request(self.url) |
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50 end = '' |
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51 if bytes: |
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52 end = self.pos + bytes - 1 |
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53 if self.pos or end: |
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54 req.add_header('Range', 'bytes=%d-%s' % (self.pos, end)) |
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55 |
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56 try: |
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57 f = self.opener.open(req) |
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58 data = f.read() |
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59 code = f.code |
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60 except urlerr.httperror as inst: |
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61 num = inst.code == 404 and errno.ENOENT or None |
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62 raise IOError(num, inst) |
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63 except urlerr.urlerror as inst: |
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64 raise IOError(None, inst.reason[1]) |
1101 | 65 |
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66 if code == 200: |
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67 # HTTPRangeHandler does nothing if remote does not support |
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68 # Range headers and returns the full entity. Let's slice it. |
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69 if bytes: |
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70 data = data[self.pos:self.pos + bytes] |
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71 else: |
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72 data = data[self.pos:] |
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73 elif bytes: |
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74 data = data[:bytes] |
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75 self.pos += len(data) |
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76 return data |
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77 def readlines(self): |
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78 return self.read().splitlines(True) |
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79 def __iter__(self): |
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80 return iter(self.readlines()) |
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81 def close(self): |
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82 pass |
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83 |
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84 # _RangeError and _HTTPRangeHandler were originally in byterange.py, |
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85 # which was itself extracted from urlgrabber. See the last version of |
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86 # byterange.py from history if you need more information. |
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87 class _RangeError(IOError): |
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88 """Error raised when an unsatisfiable range is requested.""" |
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89 |
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90 class _HTTPRangeHandler(urlreq.basehandler): |
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91 """Handler that enables HTTP Range headers. |
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92 |
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93 This was extremely simple. The Range header is a HTTP feature to |
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94 begin with so all this class does is tell urllib2 that the |
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95 "206 Partial Content" response from the HTTP server is what we |
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96 expected. |
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97 """ |
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98 |
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99 def http_error_206(self, req, fp, code, msg, hdrs): |
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100 # 206 Partial Content Response |
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101 r = urlreq.addinfourl(fp, hdrs, req.get_full_url()) |
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102 r.code = code |
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103 r.msg = msg |
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104 return r |
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105 |
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106 def http_error_416(self, req, fp, code, msg, hdrs): |
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107 # HTTP's Range Not Satisfiable error |
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108 raise _RangeError('Requested Range Not Satisfiable') |
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109 |
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110 def build_opener(ui, authinfo): |
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111 # urllib cannot handle URLs with embedded user or passwd |
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112 urlopener = url.opener(ui, authinfo) |
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statichttprepo: move HTTPRangeHandler from byterange and delete the latter
Augie Fackler <augie@google.com>
parents:
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113 urlopener.add_handler(_HTTPRangeHandler()) |
7274
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114 |
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
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115 class statichttpvfs(vfsmod.abstractvfs): |
14091
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parents:
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116 def __init__(self, base): |
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117 self.base = base |
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118 |
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statichttprepo: update profile of __call__ in mock vfs object
Mads Kiilerich <madski@unity3d.com>
parents:
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119 def __call__(self, path, mode='r', *args, **kw): |
13533
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statichttprepo: abort if opener mode is 'r+' or 'rb+'
Adrian Buehlmann <adrian@cadifra.com>
parents:
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120 if mode not in ('r', 'rb'): |
11066
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static-http: mimic more closely localrepo (issue2164: allow clone -r )
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
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121 raise IOError('Permission denied') |
28883
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pycompat: switch to util.urlreq/util.urlerr for py3 compat
timeless <timeless@mozdev.org>
parents:
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122 f = "/".join((self.base, urlreq.quote(path))) |
7274
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123 return httprangereader(f, urlopener) |
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124 |
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125 def join(self, path): |
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126 if path: |
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127 return pathutil.join(self.base, path) |
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128 else: |
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129 return self.base |
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130 |
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scmutil: rename classes from "opener" to "vfs"
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131 return statichttpvfs |
1101 | 132 |
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133 class statichttppeer(localrepo.localpeer): |
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134 def local(self): |
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135 return None |
17193
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Sune Foldager <cryo@cyanite.org>
parents:
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136 def canpush(self): |
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137 return False |
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138 |
1101 | 139 class statichttprepository(localrepo.localrepository): |
19778
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
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140 supported = localrepo.localrepository._basesupported |
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141 |
1101 | 142 def __init__(self, ui, path): |
2673
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143 self._url = path |
1101 | 144 self.ui = ui |
3853
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switch to the .hg/store layout, fix the tests
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parents:
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145 |
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146 self.root = path |
14076
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Brodie Rao <brodie@bitheap.org>
parents:
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147 u = util.url(path.rstrip('/') + "/.hg") |
13819
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148 self.path, authinfo = u.authinfo() |
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149 |
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150 vfsclass = build_opener(ui, authinfo) |
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151 self.vfs = vfsclass(self.path) |
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cachevfs: add a vfs dedicated to cache
Boris Feld <boris.feld@octobus.net>
parents:
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152 self.cachevfs = vfsclass(self.vfs.join('cache')) |
15922
23921c17299a
phases: mechanism to allow extension to alter initial computation of phase
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
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153 self._phasedefaults = [] |
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make static-http work with empty repos (issue965)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents:
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154 |
23561
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namespaces: remove weakref; always pass in repo
Ryan McElroy <rmcelroy@fb.com>
parents:
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diff
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155 self.names = namespaces.namespaces() |
32730
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localrepo: move filtername to __init__
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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156 self.filtername = None |
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namespaces: add bookmarks to the names data structure
Sean Farley <sean.michael.farley@gmail.com>
parents:
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157 |
3851
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158 try: |
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parents:
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159 requirements = scmutil.readrequires(self.vfs, self.supported) |
25660
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global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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160 except IOError as inst: |
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Fix Debian bug #494889 (fetching from static-http://... broken)
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161 if inst.errno != errno.ENOENT: |
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162 raise |
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163 requirements = set() |
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164 |
7178
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165 # check if it is a non-empty old-style repository |
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166 try: |
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167 fp = self.vfs("00changelog.i") |
13400
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168 fp.read(1) |
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169 fp.close() |
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170 except IOError as inst: |
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171 if inst.errno != errno.ENOENT: |
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172 raise |
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173 # we do not care about empty old-style repositories here |
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174 msg = _("'%s' does not appear to be an hg repository") % path |
7637 | 175 raise error.RepoError(msg) |
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176 |
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177 # setup store |
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178 self.store = store.store(requirements, self.path, vfsclass) |
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179 self.spath = self.store.path |
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parents:
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180 self.svfs = self.store.opener |
6897
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181 self.sjoin = self.store.join |
16115
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scmutil: update cached copy when filecached attribute is assigned (issue3263)
Idan Kamara <idankk86@gmail.com>
parents:
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182 self._filecache = {} |
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183 self.requirements = requirements |
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184 |
30219
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Durham Goode <durham@fb.com>
parents:
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changeset
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185 self.manifestlog = manifest.manifestlog(self.svfs, self) |
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186 self.changelog = changelog.changelog(self.svfs) |
9146
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localrepo: rename in-memory tag cache instance attributes (issue548).
Greg Ward <greg-hg@gerg.ca>
parents:
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187 self._tags = None |
1101 | 188 self.nodetagscache = None |
18189
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branchmap: enable caching for filtered version too
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
18125
diff
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189 self._branchcaches = {} |
24373
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revbranchcache: move out of branchmap onto localrepo
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parents:
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|
190 self._revbranchcache = None |
1598
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191 self.encodepats = None |
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192 self.decodepats = None |
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193 self._transref = None |
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194 |
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195 def _restrictcapabilities(self, caps): |
20962
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statichttp: respect localrepo _restrictcapabilities
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196 caps = super(statichttprepository, self)._restrictcapabilities(caps) |
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197 return caps.difference(["pushkey"]) |
1101 | 198 |
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199 def url(self): |
7211 | 200 return self._url |
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201 |
1101 | 202 def local(self): |
203 return False | |
2740
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204 |
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205 def peer(self): |
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206 return statichttppeer(self) |
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207 |
33604
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statichttprepo: implement wlock() (issue5613)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
208 def wlock(self, wait=True): |
36657
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py3: back out c77c925987d7 to store bytes filename in IOError
Yuya Nishihara <yuya@tcha.org>
parents:
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changeset
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209 raise error.LockUnavailable(0, _('lock not available'), 'lock', |
33604
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
210 _('cannot lock static-http repository')) |
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parents:
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211 |
7005
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do not pretend to lock static-http repositories (issue994)
Martin Geisler <mg@daimi.au.dk>
parents:
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changeset
|
212 def lock(self, wait=True): |
26587
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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changeset
|
213 raise error.Abort(_('cannot lock static-http repository')) |
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Martin Geisler <mg@daimi.au.dk>
parents:
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214 |
29738
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parents:
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|
215 def _writecaches(self): |
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216 pass # statichttprepository are read only |
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217 |
2740
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parents:
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changeset
|
218 def instance(ui, path, create): |
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parents:
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219 if create: |
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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changeset
|
220 raise error.Abort(_('cannot create new static-http repository')) |
4853
bf10a03a6b24
Removed deprecated hg:// and old-http:// protocols (issue406)
Thomas Arendsen Hein <thomas@intevation.de>
parents:
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diff
changeset
|
221 return statichttprepository(ui, path[7:]) |