Mercurial > hgsubversion
annotate svnwrap/svn_swig_wrapper.py @ 69:63ece4ea25c9
hg_delta_editor: register copies only if files are unchanged between source and dest
Handle copies of items from revision X into revision Y where X is not the
parent of Y. This cannot happen in Mercurial because copies always happen
between parents and children. A file copy is recorded if:
1- Source and destination revs are in the same branch.
2- The file is unchanged (content, type, removal) through all revisions between
destination and source, not including source and destination.
Directory copies are registered only if the previous rules apply on all copied
items.
[1] is there because file copies across branches are meaningless in Mercurial
world. We could have tried to remap the source rev to a similar one in the
correct branch, but anyway the intent is wrong.
[2] is more questionable but I think it's better this way for we live in a
non-perfect svn world. In theory, 99% of copies out there should come from the
direct parent. But the direct parent is a fuzzy notion when you can have a
working directory composed of different directory at different revisions. So we
assume that stuff copied from past revisions exactly matching the content of
the direct parent revision is really copied from the parent revision. The
alternative would be to discard the copy, which would always happen unless
people kept updating the working directory after every commit (see
tests).
author | Patrick Mezard <pmezard@gmail.com> |
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date | Wed, 05 Nov 2008 13:37:08 +0100 |
parents | a31968146f3c |
children | 49b7cbe4c8e3 |
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1 import cStringIO |
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2 import getpass |
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3 import os |
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4 import shutil |
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5 import sys |
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6 import tempfile |
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7 import hashlib |
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8 |
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9 from svn import client |
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10 from svn import core |
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11 from svn import delta |
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12 from svn import ra |
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13 |
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14 if (core.SVN_VER_MAJOR, core.SVN_VER_MINOR, core.SVN_VER_MICRO) < (1, 5, 0): #pragma: no cover |
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15 raise ImportError, 'You must have Subversion 1.5.0 or newer and matching SWIG bindings.' |
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16 |
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17 svn_config = core.svn_config_get_config(None) |
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18 class RaCallbacks(ra.Callbacks): |
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19 def open_tmp_file(self, pool): #pragma: no cover |
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20 (fd, fn) = tempfile.mkstemp() |
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21 os.close(fd) |
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22 return fn |
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23 |
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24 def get_client_string(self, pool): |
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25 return 'hgsubversion' |
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26 |
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27 |
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28 def user_pass_prompt(realm, default_username, ms, pool): #pragma: no cover |
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29 creds = core.svn_auth_cred_simple_t() |
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30 creds.may_save = ms |
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31 if default_username: |
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32 sys.stderr.write('Auth realm: %s\n' % (realm,)) |
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33 creds.username = default_username |
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34 else: |
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35 sys.stderr.write('Auth realm: %s\n' % (realm,)) |
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36 sys.stderr.write('Username: ') |
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37 sys.stderr.flush() |
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38 creds.username = sys.stdin.readline().strip() |
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39 creds.password = getpass.getpass('Password for %s: ' % creds.username) |
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40 return creds |
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41 |
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42 def _create_auth_baton(pool): |
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43 """Create a Subversion authentication baton. """ |
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44 # Give the client context baton a suite of authentication |
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45 # providers.h |
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46 providers = [ |
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47 client.get_simple_provider(), |
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48 client.get_username_provider(), |
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49 client.get_ssl_client_cert_file_provider(), |
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50 client.get_ssl_client_cert_pw_file_provider(), |
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51 client.get_ssl_server_trust_file_provider(), |
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52 ] |
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53 # Platform-dependant authentication methods |
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54 if hasattr(client, 'get_windows_simple_provider'): #pragma: no cover |
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55 try: |
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56 providers.append(client.get_windows_simple_provider()) |
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57 except: |
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58 pass |
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59 if hasattr(client, 'get_keychain_simple_provider'): #pragma: no cover |
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60 try: |
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61 providers.append(client.get_keychain_simple_provider()) |
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62 except: |
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63 pass |
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64 providers.extend([client.get_simple_prompt_provider(user_pass_prompt, 2), |
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65 ]) |
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66 return core.svn_auth_open(providers, pool) |
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67 |
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68 |
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69 class Revision(object): |
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70 """Wrapper for a Subversion revision. |
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71 """ |
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72 def __init__(self, revnum, author, message, date, paths, strip_path=''): |
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73 self.revnum, self.author, self.message = revnum, author, message |
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74 # TODO parse this into a datetime |
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75 self.date = date |
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76 self.paths = {} |
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77 if paths: |
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78 for p in paths: |
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79 self.paths[p[len(strip_path):]] = paths[p] |
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80 |
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81 def __str__(self): |
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82 return 'r%d by %s' % (self.revnum, self.author) |
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83 |
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84 class SubversionRepo(object): |
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85 """Wrapper for a Subversion repository. |
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86 |
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87 This uses the SWIG Python bindings, and will only work on svn >= 1.4. |
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88 It takes a required param, the URL. |
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89 """ |
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90 def __init__(self, url='', username=''): |
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91 self.svn_url = url |
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92 self.uname = username |
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93 self.auth_baton_pool = core.Pool() |
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94 self.auth_baton = _create_auth_baton(self.auth_baton_pool) |
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95 |
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96 self.init_ra_and_client() |
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97 self.uuid = ra.get_uuid(self.ra, self.pool) |
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98 repo_root = ra.get_repos_root(self.ra, self.pool) |
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99 # *will* have a leading '/', would not if we used get_repos_root2 |
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100 self.subdir = url[len(repo_root):] |
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101 if not self.subdir or self.subdir[-1] != '/': |
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102 self.subdir += '/' |
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103 |
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104 def init_ra_and_client(self): |
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105 """Initializes the RA and client layers, because sometimes getting |
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106 unified diffs runs the remote server out of open files. |
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107 """ |
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108 # while we're in here we'll recreate our pool |
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109 self.pool = core.Pool() |
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110 self.client_context = client.create_context() |
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111 core.svn_auth_set_parameter(self.auth_baton, |
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112 core.SVN_AUTH_PARAM_DEFAULT_USERNAME, |
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113 self.uname) |
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114 |
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115 self.client_context.auth_baton = self.auth_baton |
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116 self.client_context.config = svn_config |
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117 callbacks = RaCallbacks() |
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118 callbacks.auth_baton = self.auth_baton |
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119 self.callbacks = callbacks |
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120 self.ra = ra.open2(self.svn_url.encode('utf-8'), callbacks, |
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121 svn_config, self.pool) |
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122 |
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123 @property |
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124 def HEAD(self): |
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125 return ra.get_latest_revnum(self.ra, self.pool) |
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126 |
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127 @property |
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128 def START(self): |
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129 return 0 |
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130 |
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131 @property |
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132 def branches(self): |
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133 """Get the branches defined in this repo assuming a standard layout. |
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134 """ |
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135 branches = self.list_dir('branches').keys() |
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136 branch_info = {} |
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137 head=self.HEAD |
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138 for b in branches: |
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139 b_path = 'branches/%s' %b |
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140 hist_gen = self.fetch_history_at_paths([b_path], stop=head) |
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141 hist = hist_gen.next() |
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142 source, source_rev = self._get_copy_source(b_path, cached_head=head) |
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143 # This if statement guards against projects that have non-ancestral |
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144 # branches by not listing them has branches |
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145 # Note that they probably are really ancestrally related, but there |
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146 # is just no way for us to know how. |
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147 if source is not None and source_rev is not None: |
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148 branch_info[b] = (source, source_rev, hist.revnum) |
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149 return branch_info |
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150 |
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151 @property |
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152 def tags(self): |
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153 """Get the current tags in this repo assuming a standard layout. |
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154 |
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155 This returns a dictionary of tag: (source path, source rev) |
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156 """ |
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157 tags = self.list_dir('tags').keys() |
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158 tag_info = {} |
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159 head = self.HEAD |
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160 for t in tags: |
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161 tag_info[t] = self._get_copy_source('tags/%s' % t, |
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162 cached_head=head) |
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163 return tag_info |
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164 |
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165 def _get_copy_source(self, path, cached_head=None): |
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166 """Get copy revision for the given path, assuming it was meant to be |
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167 a copy of the entire tree. |
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168 """ |
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169 if not cached_head: |
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170 cached_head = self.HEAD |
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171 hist_gen = self.fetch_history_at_paths([path], stop=cached_head) |
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172 hist = hist_gen.next() |
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173 if hist.paths[path].copyfrom_path is None: |
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174 return None, None |
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175 source = hist.paths[path].copyfrom_path |
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176 source_rev = 0 |
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177 for p in hist.paths: |
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178 if hist.paths[p].copyfrom_rev: |
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179 # We assume that the revision of the source tree as it was |
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180 # copied was actually the revision of the highest revision |
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181 # copied item. This could be wrong, but in practice it will |
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182 # *probably* be correct |
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183 if source_rev < hist.paths[p].copyfrom_rev: |
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184 source_rev = hist.paths[p].copyfrom_rev |
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185 source = source[len(self.subdir):] |
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186 return source, source_rev |
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187 |
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188 def list_dir(self, dir, revision=None): |
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189 """List the contents of a server-side directory. |
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190 |
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191 Returns a dict-like object with one dict key per directory entry. |
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192 |
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193 Args: |
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194 dir: the directory to list, no leading slash |
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195 rev: the revision at which to list the directory, defaults to HEAD |
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196 """ |
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197 if dir[-1] == '/': |
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198 dir = dir[:-1] |
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199 if revision is None: |
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200 revision = self.HEAD |
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201 r = ra.get_dir2(self.ra, dir, revision, core.SVN_DIRENT_KIND, self.pool) |
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202 folders, props, junk = r |
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203 return folders |
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204 |
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205 def revisions(self, start=None, chunk_size=1000): |
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206 """Load the history of this repo. |
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207 |
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208 This is LAZY. It returns a generator, and fetches a small number |
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209 of revisions at a time. |
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210 |
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211 The reason this is lazy is so that you can use the same repo object |
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212 to perform RA calls to get deltas. |
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213 """ |
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214 # NB: you'd think this would work, but you'd be wrong. I'm pretty |
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215 # convinced there must be some kind of svn bug here. |
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216 #return self.fetch_history_at_paths(['tags', 'trunk', 'branches'], |
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217 # start=start) |
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218 # this does the same thing, but at the repo root + filtering. It's |
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219 # kind of tough cookies, sadly. |
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220 for r in self.fetch_history_at_paths([''], start=start, |
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221 chunk_size=chunk_size): |
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222 should_yield = False |
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223 i = 0 |
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224 paths = list(r.paths.keys()) |
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225 while i < len(paths) and not should_yield: |
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226 p = paths[i] |
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227 if (p.startswith('trunk') or p.startswith('tags') |
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228 or p.startswith('branches')): |
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229 should_yield = True |
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230 i += 1 |
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231 if should_yield: |
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232 yield r |
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233 |
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234 |
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235 def fetch_history_at_paths(self, paths, start=None, stop=None, |
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236 chunk_size=1000): |
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237 revisions = [] |
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238 def callback(paths, revnum, author, date, message, pool): |
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239 r = Revision(revnum, author, message, date, paths, |
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240 strip_path=self.subdir) |
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241 revisions.append(r) |
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242 if not start: |
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243 start = self.START |
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244 if not stop: |
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245 stop = self.HEAD |
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246 while stop > start: |
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247 ra.get_log(self.ra, |
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248 paths, |
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249 start+1, |
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250 stop, |
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251 chunk_size, #limit of how many log messages to load |
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252 True, # don't need to know changed paths |
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253 True, # stop on copies |
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254 callback, |
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255 self.pool) |
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256 if len(revisions) < chunk_size: |
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257 # this means there was no history for the path, so force the |
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258 # loop to exit |
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259 start = stop |
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260 else: |
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261 start = revisions[-1].revnum |
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262 while len(revisions) > 0: |
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263 yield revisions[0] |
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264 revisions.pop(0) |
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265 |
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266 def commit(self, paths, message, file_data, base_revision, dirs, |
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267 properties): |
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268 """Commits the appropriate targets from revision in editor's store. |
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269 """ |
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270 self.init_ra_and_client() |
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271 commit_info = [] |
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272 def commit_cb(_commit_info, pool): |
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273 commit_info.append(_commit_info) |
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274 editor, edit_baton = ra.get_commit_editor2(self.ra, |
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275 message, |
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276 commit_cb, |
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277 None, |
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278 False, |
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279 self.pool) |
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280 checksum = [] |
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281 # internal dir batons can fall out of scope and get GCed before svn is |
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282 # done with them. This prevents that (credit to gvn for the idea). |
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283 batons = [edit_baton, ] |
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284 def driver_cb(parent, path, pool): |
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285 if not parent: |
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286 bat = editor.open_root(edit_baton, base_revision, self.pool) |
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287 batons.append(bat) |
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288 return bat |
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289 if path in dirs: |
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290 bat = editor.add_directory(path, parent, None, -1, pool) |
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291 batons.append(bat) |
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292 return bat |
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293 base_text, new_text, action = file_data[path] |
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294 compute_delta = True |
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295 if action == 'modify': |
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296 baton = editor.open_file(path, parent, base_revision, pool) |
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297 elif action == 'add': |
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298 try: |
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299 baton = editor.add_file(path, parent, None, -1, pool) |
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300 except (core.SubversionException, TypeError), e: #pragma: no cover |
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301 print e.message |
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302 raise |
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303 elif action == 'delete': |
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304 baton = editor.delete_entry(path, base_revision, parent, pool) |
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305 compute_delta = False |
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306 |
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307 if path in properties: |
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308 if properties[path].get('svn:special', None): |
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309 new_text = 'link %s' % new_text |
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310 for p, v in properties[path].iteritems(): |
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311 editor.change_file_prop(baton, p, v) |
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312 |
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313 if compute_delta: |
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314 handler, wh_baton = editor.apply_textdelta(baton, None, |
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315 self.pool) |
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316 |
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317 txdelta_stream = delta.svn_txdelta( |
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318 cStringIO.StringIO(base_text), cStringIO.StringIO(new_text), |
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319 self.pool) |
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320 delta.svn_txdelta_send_txstream(txdelta_stream, handler, |
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321 wh_baton, pool) |
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322 |
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323 # TODO pass md5(new_text) instead of None |
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324 editor.close_file(baton, None, pool) |
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325 |
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326 delta.path_driver(editor, edit_baton, base_revision, paths, driver_cb, |
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327 self.pool) |
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328 editor.close_edit(edit_baton, self.pool) |
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329 |
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330 def get_replay(self, revision, editor, oldest_rev_i_have=0): |
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331 # this method has a tendency to chew through RAM if you don't re-init |
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332 self.init_ra_and_client() |
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333 e_ptr, e_baton = delta.make_editor(editor) |
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334 try: |
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335 ra.replay(self.ra, revision, oldest_rev_i_have, True, e_ptr, |
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336 e_baton, self.pool) |
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337 except core.SubversionException, e: #pragma: no cover |
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338 # can I depend on this number being constant? |
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339 if (e.message == "Server doesn't support the replay command" |
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340 or e.apr_err == 170003 |
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341 or e.message == 'The requested report is unknown.' |
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342 or e.apr_err == 200007): |
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343 raise SubversionRepoCanNotReplay, ('This Subversion server ' |
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344 'is older than 1.4.0, and cannot satisfy replay requests.') |
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345 else: |
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346 raise |
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347 |
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348 def get_unified_diff(self, path, revision, other_path=None, other_rev=None, |
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349 deleted=True, ignore_type=False): |
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350 """Gets a unidiff of path at revision against revision-1. |
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351 """ |
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352 # works around an svn server keeping too many open files (observed |
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353 # in an svnserve from the 1.2 era) |
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354 self.init_ra_and_client() |
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355 |
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356 old_cwd = os.getcwd() |
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357 assert path[0] != '/' |
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358 url = self.svn_url + '/' + path |
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359 url2 = url |
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360 if other_path is not None: |
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361 url2 = self.svn_url + '/' + other_path |
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362 if other_rev is None: |
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363 other_rev = revision - 1 |
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364 tmpdir = tempfile.mkdtemp('svnwrap_temp') |
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365 try: |
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366 # hot tip: the swig bridge doesn't like StringIO for these bad boys |
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367 out_path = os.path.join(tmpdir, 'diffout') |
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368 error_path = os.path.join(tmpdir, 'differr') |
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369 out = open(out_path, 'w') |
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370 err = open(error_path, 'w') |
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371 rev_old = core.svn_opt_revision_t() |
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372 rev_old.kind = core.svn_opt_revision_number |
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373 rev_old.value.number = other_rev |
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374 rev_new = core.svn_opt_revision_t() |
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375 rev_new.kind = core.svn_opt_revision_number |
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376 rev_new.value.number = revision |
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377 client.diff3([], url2, rev_old, url, rev_new, True, True, |
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378 deleted, ignore_type, 'UTF-8', out, err, |
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379 self.client_context, self.pool) |
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380 out.close() |
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381 err.close() |
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382 assert len(open(error_path).read()) == 0 |
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383 diff = open(out_path).read() |
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384 os.chdir(old_cwd) |
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385 return diff |
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386 finally: |
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387 shutil.rmtree(tmpdir) |
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388 |
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389 def get_file(self, path, revision): |
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390 out = cStringIO.StringIO() |
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391 tmpdir = tempfile.mkdtemp('svnwrap_temp') |
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392 try: |
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393 # hot tip: the swig bridge doesn't like StringIO for these bad boys |
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394 out_path = os.path.join(tmpdir, 'diffout') |
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395 out = open(out_path, 'w') |
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396 ra.get_file(self.ra, path,revision, out , None) |
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397 out.close() |
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398 x = open(out_path).read() |
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399 return x |
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400 finally: |
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401 shutil.rmtree(tmpdir) |
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402 |
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403 def proplist(self, path, revision, recurse=False): |
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404 rev = core.svn_opt_revision_t() |
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405 rev.kind = core.svn_opt_revision_number |
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406 rev.value.number = revision |
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407 if path[-1] == '/': |
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408 path = path[:-1] |
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409 if path[0] == '/': |
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410 path = path[1:] |
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411 pl = dict(client.proplist2(self.svn_url+'/'+path, rev, rev, True, |
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412 self.client_context, self.pool)) |
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413 pl2 = {} |
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414 for key, value in pl.iteritems(): |
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415 pl2[key[len(self.svn_url)+1:]] = value |
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416 return pl2 |
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417 |
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418 def fetch_all_files_to_dir(self, path, revision, checkout_path): |
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419 rev = core.svn_opt_revision_t() |
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420 rev.kind = core.svn_opt_revision_number |
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421 rev.value.number = revision |
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422 client.export3(self.svn_url+'/'+path, checkout_path, rev, |
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423 rev, True, True, True, 'LF', # should be 'CRLF' on win32 |
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424 self.client_context, self.pool) |
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425 |
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426 class SubversionRepoCanNotReplay(Exception): |
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427 """Exception raised when the svn server is too old to have replay. |
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428 """ |