Mercurial > hgsubversion
annotate fetch_command.py @ 129:59f8603a6641
fetch_command: in stupid mode, load file content on demand
author | Patrick Mezard <pmezard@gmail.com> |
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date | Wed, 10 Dec 2008 11:03:21 -0600 |
parents | bab5bcbbb3dc |
children | 2242dd1163c6 |
rev | line source |
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1 import cStringIO |
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2 import re |
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3 import os |
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4 import shutil |
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5 import tempfile |
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6 |
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7 from mercurial import patch |
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8 from mercurial import node |
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9 from mercurial import context |
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10 from mercurial import revlog |
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11 from mercurial import util as merc_util |
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12 from svn import core |
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13 from svn import delta |
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14 |
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15 import hg_delta_editor |
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16 import svnwrap |
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17 import util |
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18 |
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19 |
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20 def print_your_svn_is_old_message(ui): #pragma: no cover |
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21 ui.status("In light of that, I'll fall back and do diffs, but it won't do " |
11 | 22 "as good a job. You should really upgrade your server.\n") |
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23 |
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24 |
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25 @util.register_subcommand('pull') |
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26 def fetch_revisions(ui, svn_url, hg_repo_path, skipto_rev=0, stupid=None, |
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27 tag_locations='tags', |
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28 **opts): |
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29 """Pull new revisions from Subversion. |
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30 """ |
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31 old_encoding = merc_util._encoding |
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32 merc_util._encoding = 'UTF-8' |
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33 skipto_rev=int(skipto_rev) |
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34 have_replay = not stupid |
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35 if have_replay and not callable(delta.svn_txdelta_apply(None, None, |
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36 None)[0]): #pragma: no cover |
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37 ui.status('You are using old Subversion SWIG bindings. Replay will not' |
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38 ' work until you upgrade to 1.5.0 or newer. Falling back to' |
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39 ' a slower method that may be buggier. Please upgrade, or' |
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40 ' contribute a patch to use the ctypes bindings instead' |
29 | 41 ' of SWIG.\n') |
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42 have_replay = False |
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43 initializing_repo = False |
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44 svn = svnwrap.SubversionRepo(svn_url, username=merc_util.getuser()) |
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45 author_host = "@%s" % svn.uuid |
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46 tag_locations = tag_locations.split(',') |
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47 hg_editor = hg_delta_editor.HgChangeReceiver(hg_repo_path, |
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48 ui_=ui, |
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49 subdir=svn.subdir, |
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50 author_host=author_host, |
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51 tag_locations=tag_locations) |
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52 if os.path.exists(hg_editor.uuid_file): |
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53 uuid = open(hg_editor.uuid_file).read() |
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54 assert uuid == svn.uuid |
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55 start = int(open(hg_editor.last_revision_handled_file, 'r').read()) |
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56 else: |
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57 open(hg_editor.uuid_file, 'w').write(svn.uuid) |
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58 open(hg_editor.svn_url_file, 'w').write(svn_url) |
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59 open(hg_editor.last_revision_handled_file, 'w').write(str(0)) |
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60 initializing_repo = True |
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61 start = skipto_rev |
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62 |
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63 # start converting revisions |
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64 for r in svn.revisions(start=start): |
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65 valid = False |
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66 hg_editor.update_branch_tag_map_for_rev(r) |
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67 for p in r.paths: |
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68 if hg_editor._is_path_valid(p): |
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69 valid = True |
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70 continue |
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71 if initializing_repo and start > 0: |
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72 assert False, 'This feature not ready yet.' |
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73 if valid: |
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74 # got a 502? Try more than once! |
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75 tries = 0 |
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76 converted = False |
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77 while not converted and tries < 3: |
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78 try: |
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79 ui.status('converting %s\n' % r) |
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80 if have_replay: |
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81 try: |
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82 replay_convert_rev(hg_editor, svn, r) |
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83 except svnwrap.SubversionRepoCanNotReplay, e: #pragma: no cover |
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84 ui.status('%s\n' % e.message) |
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85 print_your_svn_is_old_message(ui) |
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86 have_replay = False |
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87 stupid_svn_server_pull_rev(ui, svn, hg_editor, r) |
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88 else: |
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89 stupid_svn_server_pull_rev(ui, svn, hg_editor, r) |
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90 converted = True |
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91 tmpfile = '%s_tmp' % hg_editor.last_revision_handled_file |
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92 fp = open(tmpfile, 'w') |
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93 fp.write(str(r.revnum)) |
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94 fp.close() |
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95 merc_util.rename(tmpfile, |
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96 hg_editor.last_revision_handled_file) |
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97 except core.SubversionException, e: #pragma: no cover |
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98 if hasattr(e, 'message') and ( |
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99 'Server sent unexpected return value (502 Bad Gateway)' |
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100 ' in response to PROPFIND') in e.message: |
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101 tries += 1 |
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102 ui.status('Got a 502, retrying (%s)\n' % tries) |
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103 else: |
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104 raise |
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105 merc_util._encoding = old_encoding |
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106 |
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107 |
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108 def cleanup_file_handles(svn, count): |
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109 if count % 50 == 0: |
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110 svn.init_ra_and_client() |
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111 |
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112 def replay_convert_rev(hg_editor, svn, r): |
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113 hg_editor.set_current_rev(r) |
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114 svn.get_replay(r.revnum, hg_editor) |
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115 i = 1 |
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116 if hg_editor.missing_plaintexts: |
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117 hg_editor.ui.status('Fetching %s files that could not use replay.\n' % |
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118 len(hg_editor.missing_plaintexts)) |
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119 files_to_grab = set() |
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120 rootpath = svn.subdir and svn.subdir[1:] or '' |
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121 for p in hg_editor.missing_plaintexts: |
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122 hg_editor.ui.status('.') |
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123 hg_editor.ui.flush() |
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124 if p[-1] == '/': |
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125 dirpath = p[len(rootpath):] |
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126 files_to_grab.update((dirpath + f for f,k in |
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127 svn.list_files(dirpath, r.revnum) |
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128 if k == 'f')) |
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129 else: |
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130 files_to_grab.add(p[len(rootpath):]) |
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131 hg_editor.ui.status('\nFetching files...\n') |
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132 for p in files_to_grab: |
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133 hg_editor.ui.status('.') |
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134 hg_editor.ui.flush() |
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135 cleanup_file_handles(svn, i) |
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136 i += 1 |
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137 data, mode = svn.get_file(p, r.revnum) |
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138 hg_editor.set_file(p, data, 'x' in mode, 'l' in mode) |
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139 hg_editor.missing_plaintexts = set() |
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140 hg_editor.ui.status('\n') |
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141 hg_editor.commit_current_delta() |
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142 |
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143 |
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144 binary_file_re = re.compile(r'''Index: ([^\n]*) |
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145 =* |
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146 Cannot display: file marked as a binary type.''') |
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147 |
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148 property_exec_set_re = re.compile(r'''Property changes on: ([^\n]*) |
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149 _* |
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150 (?:Added|Name): svn:executable |
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151 \+''') |
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152 |
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153 property_exec_removed_re = re.compile(r'''Property changes on: ([^\n]*) |
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154 _* |
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155 (?:Deleted|Name): svn:executable |
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156 -''') |
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157 |
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158 empty_file_patch_wont_make_re = re.compile(r'''Index: ([^\n]*)\n=*\n(?=Index:)''') |
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159 |
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160 any_file_re = re.compile(r'''^Index: ([^\n]*)\n=*\n''', re.MULTILINE) |
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161 |
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162 property_special_set_re = re.compile(r'''Property changes on: ([^\n]*) |
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163 _* |
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164 (?:Added|Name): svn:special |
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165 \+''') |
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166 |
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167 property_special_removed_re = re.compile(r'''Property changes on: ([^\n]*) |
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168 _* |
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169 (?:Deleted|Name): svn:special |
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170 \-''') |
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171 |
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172 def mempatchproxy(parentctx, files): |
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173 # Avoid circular references patch.patchfile -> mempatch |
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174 patchfile = patch.patchfile |
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175 |
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176 class mempatch(patchfile): |
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177 def __init__(self, ui, fname, opener, missing=False): |
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178 patchfile.__init__(self, ui, fname, None, False) |
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179 |
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180 def readlines(self, fname): |
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181 if fname not in parentctx: |
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182 raise IOError('Cannot find %r to patch' % fname) |
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183 fctx = parentctx[fname] |
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184 data = fctx.data() |
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185 if 'l' in fctx.flags(): |
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186 data = 'link ' + data |
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187 return cStringIO.StringIO(data).readlines() |
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188 |
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189 def writelines(self, fname, lines): |
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190 files[fname] = ''.join(lines) |
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191 |
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192 def unlink(self, fname): |
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193 files[fname] = None |
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194 |
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195 return mempatch |
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196 |
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197 def stupid_diff_branchrev(ui, svn, hg_editor, branch, r, parentctx): |
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198 """Extract all 'branch' content at a given revision. |
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199 |
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200 Return a tuple (files, filectxfn) where 'files' is the list of all files |
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201 in the branch at the given revision, and 'filectxfn' is a memctx compatible |
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202 callable to retrieve individual file information. Raise BadPatchApply upon |
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203 error. |
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204 """ |
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205 def make_diff_path(b): |
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206 if b == None: |
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207 return 'trunk' |
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208 return 'branches/' + b |
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209 |
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210 parent_rev, br_p = hg_editor.get_parent_svn_branch_and_rev(r.revnum, branch) |
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211 diff_path = make_diff_path(branch) |
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212 try: |
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213 if br_p == branch: |
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214 # letting patch handle binaries sounded |
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215 # cool, but it breaks patch in sad ways |
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216 d = svn.get_unified_diff(diff_path, r.revnum, deleted=False, |
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217 ignore_type=False) |
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218 else: |
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219 d = svn.get_unified_diff(diff_path, r.revnum, |
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220 other_path=make_diff_path(br_p), |
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221 other_rev=parent_rev, |
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222 deleted=True, ignore_type=True) |
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223 if d: |
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224 raise BadPatchApply('branch creation with mods') |
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225 except svnwrap.SubversionRepoCanNotDiff: |
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226 raise BadPatchApply('subversion diffing code is not supported') |
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227 except core.SubversionException, e: |
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228 if (hasattr(e, 'apr_err') and e.apr_err != 160013): |
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229 raise |
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230 raise BadPatchApply('previous revision does not exist') |
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231 files_data = {} |
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232 binary_files = {} |
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233 touched_files = {} |
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234 for m in binary_file_re.findall(d): |
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235 # we have to pull each binary file by hand as a fulltext, |
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236 # which sucks but we've got no choice |
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237 binary_files[m] = 1 |
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238 touched_files[m] = 1 |
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239 d2 = empty_file_patch_wont_make_re.sub('', d) |
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240 d2 = property_exec_set_re.sub('', d2) |
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241 d2 = property_exec_removed_re.sub('', d2) |
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242 for f in any_file_re.findall(d): |
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243 # Here we ensure that all files, including the new empty ones |
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244 # are marked as touched. Content is loaded on demand. |
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245 touched_files[f] = 1 |
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246 if d2.strip() and len(re.findall('\n[-+]', d2.strip())) > 0: |
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247 try: |
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248 oldpatchfile = patch.patchfile |
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249 patch.patchfile = mempatchproxy(parentctx, files_data) |
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250 try: |
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251 # We can safely ignore the changed list since we are |
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252 # handling non-git patches. Touched files are known |
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253 # by our memory patcher. |
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254 patch_st = patch.applydiff(ui, cStringIO.StringIO(d2), |
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255 {}, strip=0) |
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256 finally: |
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257 patch.patchfile = oldpatchfile |
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258 except patch.PatchError: |
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259 # TODO: this happens if the svn server has the wrong mime |
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260 # type stored and doesn't know a file is binary. It would |
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261 # be better to do one file at a time and only do a |
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262 # full fetch on files that had problems. |
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263 raise BadPatchApply('patching failed') |
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264 for x in files_data.iterkeys(): |
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265 ui.status('M %s\n' % x) |
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266 # if this patch didn't apply right, fall back to exporting the |
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267 # entire rev. |
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268 if patch_st == -1: |
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269 assert False, ('This should only happen on case-insensitive' |
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270 ' volumes.') |
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271 elif patch_st == 1: |
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272 # When converting Django, I saw fuzz on .po files that was |
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273 # causing revisions to end up failing verification. If that |
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274 # can be fixed, maybe this won't ever be reached. |
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275 raise BadPatchApply('patching succeeded with fuzz') |
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276 else: |
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277 ui.status('Not using patch for %s, diff had no hunks.\n' % |
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278 r.revnum) |
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279 |
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280 exec_files = {} |
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281 for m in property_exec_removed_re.findall(d): |
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282 exec_files[m] = False |
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283 for m in property_exec_set_re.findall(d): |
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284 exec_files[m] = True |
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285 for m in exec_files: |
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286 touched_files[m] = 1 |
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287 link_files = {} |
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288 for m in property_special_set_re.findall(d): |
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289 # TODO(augie) when a symlink is removed, patching will fail. |
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290 # We're seeing that above - there's gotta be a better |
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291 # workaround than just bailing like that. |
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292 assert m in files_data |
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293 link_files[m] = True |
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294 for m in property_special_removed_re.findall(d): |
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295 assert m in files_data |
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296 link_files[m] = False |
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297 |
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298 for p in r.paths: |
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299 if p.startswith(diff_path) and r.paths[p].action == 'D': |
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300 p2 = p[len(diff_path)+1:].strip('/') |
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301 if p2 in parentctx: |
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302 files_data[p2] = None |
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303 continue |
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304 # If this isn't in the parent ctx, it must've been a dir |
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305 files_data.update([(f, None) for f in parentctx if f.startswith(p2 + '/')]) |
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306 |
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307 for f in files_data: |
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308 touched_files[f] = 1 |
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309 |
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310 copies = getcopies(svn, hg_editor, branch, diff_path, r, touched_files, |
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311 parentctx) |
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312 |
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313 def filectxfn(repo, memctx, path): |
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314 if path in files_data and files_data[path] is None: |
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315 raise IOError() |
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316 |
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317 if path in binary_files: |
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318 data, mode = svn.get_file(diff_path + '/' + path, r.revnum) |
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319 isexe = 'x' in mode |
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320 islink = 'l' in mode |
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321 else: |
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322 isexe = exec_files.get(path, 'x' in parentctx.flags(path)) |
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323 islink = link_files.get(path, 'l' in parentctx.flags(path)) |
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324 data = '' |
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325 if path in files_data: |
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326 data = files_data[path] |
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327 if islink: |
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328 data = data[len('link '):] |
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329 elif path in parentctx: |
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330 data = parentctx[path].data() |
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331 |
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332 copied = copies.get(path) |
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333 return context.memfilectx(path=path, data=data, islink=islink, |
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334 isexec=isexe, copied=copied) |
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335 |
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336 return list(touched_files), filectxfn |
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337 |
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338 def makecopyfinder(r, branchpath, rootdir): |
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339 """Return a function detecting copies. |
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340 |
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341 Returned copyfinder(path) returns None if no copy information can |
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342 be found or ((source, sourcerev), sourcepath) where "sourcepath" is the |
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343 copy source path, "sourcerev" the source svn revision and "source" is the |
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344 copy record path causing the copy to occur. If a single file was copied |
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345 "sourcepath" and "source" are the same, while file copies dectected from |
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346 directory copies return the copied source directory in "source". |
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347 """ |
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348 # filter copy information for current branch |
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349 branchpath = branchpath + '/' |
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350 fullbranchpath = rootdir + branchpath |
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351 copies = [] |
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352 for path, e in r.paths.iteritems(): |
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353 if not e.copyfrom_path: |
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354 continue |
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355 if not path.startswith(branchpath): |
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356 continue |
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357 if not e.copyfrom_path.startswith(fullbranchpath): |
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358 # ignore cross branch copies |
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359 continue |
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360 dest = path[len(branchpath):] |
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361 source = e.copyfrom_path[len(fullbranchpath):] |
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362 copies.append((dest, (source, e.copyfrom_rev))) |
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363 |
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364 copies.sort() |
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365 copies.reverse() |
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366 exactcopies = dict(copies) |
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367 |
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368 def finder(path): |
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369 if path in exactcopies: |
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370 return exactcopies[path], exactcopies[path][0] |
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371 # look for parent directory copy, longest first |
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372 for dest, (source, sourcerev) in copies: |
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373 dest = dest + '/' |
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374 if not path.startswith(dest): |
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375 continue |
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376 sourcepath = source + '/' + path[len(dest):] |
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377 return (source, sourcerev), sourcepath |
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378 return None |
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379 |
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380 return finder |
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381 |
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382 def getcopies(svn, hg_editor, branch, branchpath, r, files, parentctx): |
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383 """Return a mapping {dest: source} for every file copied into r. |
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384 """ |
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385 if parentctx.node() == revlog.nullid: |
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386 return {} |
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387 |
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388 # Extract svn copy information, group them by copy source. |
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389 # The idea is to duplicate the replay behaviour where copies are |
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390 # evaluated per copy event (one event for all files in a directory copy, |
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391 # one event for single file copy). We assume that copy events match |
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392 # copy sources in revision info. |
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393 svncopies = {} |
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394 finder = makecopyfinder(r, branchpath, svn.subdir) |
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395 for f in files: |
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396 copy = finder(f) |
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397 if copy: |
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398 svncopies.setdefault(copy[0], []).append((f, copy[1])) |
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399 if not svncopies: |
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400 return {} |
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401 |
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402 # cache changeset contexts and map them to source svn revisions |
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403 ctxs = {} |
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404 def getctx(svnrev): |
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405 if svnrev in ctxs: |
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406 return ctxs[svnrev] |
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407 changeid = hg_editor.get_parent_revision(svnrev + 1, branch) |
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408 ctx = None |
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409 if changeid != revlog.nullid: |
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410 ctx = hg_editor.repo.changectx(changeid) |
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411 ctxs[svnrev] = ctx |
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412 return ctx |
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413 |
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414 # check svn copies really make sense in mercurial |
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415 hgcopies = {} |
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416 for (sourcepath, rev), copies in svncopies.iteritems(): |
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417 sourcectx = getctx(rev) |
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418 if sourcectx is None: |
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419 continue |
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420 sources = [s[1] for s in copies] |
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421 if not hg_editor.aresamefiles(sourcectx, parentctx, sources): |
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422 continue |
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423 hgcopies.update(copies) |
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424 return hgcopies |
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425 |
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426 def stupid_fetch_branchrev(svn, hg_editor, branch, branchpath, r, parentctx): |
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427 """Extract all 'branch' content at a given revision. |
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428 |
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429 Return a tuple (files, filectxfn) where 'files' is the list of all files |
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430 in the branch at the given revision, and 'filectxfn' is a memctx compatible |
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431 callable to retrieve individual file information. |
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432 """ |
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433 files = [] |
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434 if parentctx.node() == revlog.nullid: |
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435 # Initial revision, fetch all files |
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436 for path, kind in svn.list_files(branchpath, r.revnum): |
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437 if kind == 'f': |
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438 files.append(path) |
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439 else: |
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440 branchprefix = branchpath + '/' |
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441 for path, e in r.paths.iteritems(): |
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442 if not path.startswith(branchprefix): |
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443 continue |
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444 kind = svn.checkpath(path, r.revnum) |
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445 path = path[len(branchprefix):] |
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446 if kind == 'f': |
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447 files.append(path) |
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448 elif kind == 'd': |
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449 if e.action == 'M': |
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450 # Ignore property changes for now |
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451 continue |
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452 dirpath = branchprefix + path |
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453 for child, k in svn.list_files(dirpath, r.revnum): |
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454 if k == 'f': |
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455 files.append(path + '/' + child) |
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456 else: |
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457 if path in parentctx: |
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458 files.append(path) |
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459 continue |
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460 # Assume it's a deleted directory |
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461 path = path + '/' |
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462 deleted = [f for f in parentctx if f.startswith(path)] |
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463 files += deleted |
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464 |
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465 copies = getcopies(svn, hg_editor, branch, branchpath, r, files, parentctx) |
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466 |
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467 def filectxfn(repo, memctx, path): |
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468 data, mode = svn.get_file(branchpath + '/' + path, r.revnum) |
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469 isexec = 'x' in mode |
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470 islink = 'l' in mode |
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471 copied = copies.get(path) |
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472 return context.memfilectx(path=path, data=data, islink=islink, |
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473 isexec=isexec, copied=copied) |
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474 |
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475 return files, filectxfn |
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476 |
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477 def stupid_svn_server_pull_rev(ui, svn, hg_editor, r): |
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478 # this server fails at replay |
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479 branches = hg_editor.branches_in_paths(r.paths) |
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480 for b in branches: |
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481 parentctx = hg_editor.repo[hg_editor.get_parent_revision(r.revnum, b)] |
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482 kind = svn.checkpath(branches[b], r.revnum) |
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483 if kind != 'd': |
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484 # Branch does not exist at this revision. Get parent revision and |
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485 # remove everything. |
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486 files_touched = parentctx.manifest().keys() |
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487 def filectxfn(repo, memctx, path): |
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488 raise IOError() |
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489 else: |
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490 try: |
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491 files_touched, filectxfn = stupid_diff_branchrev( |
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492 ui, svn, hg_editor, b, r, parentctx) |
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493 except BadPatchApply, e: |
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494 # Either this revision or the previous one does not exist. |
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495 ui.status("fetching entire rev: %s.\n" % e.message) |
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496 files_touched, filectxfn = stupid_fetch_branchrev( |
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497 svn, hg_editor, b, branches[b], r, parentctx) |
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498 |
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499 date = r.date.replace('T', ' ').replace('Z', '').split('.')[0] |
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500 date += ' -0000' |
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501 extra = {} |
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502 if b: |
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503 extra['branch'] = b |
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504 if '' in files_touched: |
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505 files_touched.remove('') |
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506 if parentctx.node() != node.nullid or files_touched: |
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507 # TODO(augie) remove this debug code? Or maybe it's sane to have it. |
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508 for f in files_touched: |
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509 if f: |
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510 assert f[0] != '/' |
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511 current_ctx = context.memctx(hg_editor.repo, |
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512 [parentctx.node(), revlog.nullid], |
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513 r.message or '...', |
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514 files_touched, |
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515 filectxfn, |
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516 '%s%s' % (r.author, |
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517 hg_editor.author_host), |
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518 date, |
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519 extra) |
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520 ha = hg_editor.repo.commitctx(current_ctx) |
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521 hg_editor.add_to_revmap(r.revnum, b, ha) |
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522 hg_editor._save_metadata() |
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523 ui.status('committed as %s on branch %s\n' % |
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524 (node.hex(ha), b or 'default')) |
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525 |
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526 class BadPatchApply(Exception): |
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527 pass |