annotate push_cmd.py @ 70:49b7cbe4c8e3

push_cmd: handle copies at file level Mercurial store knows only file-level copies, directory copies are handle with heuristics. Implement the former one in svn backends.
author Patrick Mezard <pmezard@gmail.com>
date Wed, 05 Nov 2008 13:37:08 +0100
parents b33940d54fe2
children 6c9b7cf1c5aa
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1 from mercurial import util as merc_util
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2 from mercurial import hg
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3 from svn import core
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4
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5 import util
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6 import hg_delta_editor
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7 import svnwrap
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8 import fetch_command
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9 import utility_commands
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10
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11
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12 @util.register_subcommand('push')
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13 @util.register_subcommand('dcommit') # for git expats
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14 def push_revisions_to_subversion(ui, repo, hg_repo_path, svn_url, **opts):
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15 """Push revisions starting at a specified head back to Subversion.
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16 """
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17 oldencoding = merc_util._encoding
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18 merc_util._encoding = 'UTF-8'
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19 hge = hg_delta_editor.HgChangeReceiver(hg_repo_path,
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20 ui_=ui)
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21 svn_commit_hashes = dict(zip(hge.revmap.itervalues(),
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22 hge.revmap.iterkeys()))
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23 # Strategy:
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24 # 1. Find all outgoing commits from this head
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25 outgoing = utility_commands.outgoing_revisions(ui, repo, hge,
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26 svn_commit_hashes)
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27 if not (outgoing and len(outgoing)):
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28 ui.status('No revisions to push.')
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29 return 0
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30 if len(repo.parents()) != 1:
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31 ui.status('Cowardly refusing to push branch merge')
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32 return 1
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33 while outgoing:
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34 oldest = outgoing.pop(-1)
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35 old_ctx = repo[oldest]
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36 if len(old_ctx.parents()) != 1:
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37 ui.status('Found a branch merge, this needs discussion and '
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38 'implementation.')
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39 return 1
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40 base_n = old_ctx.parents()[0].node()
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41 old_children = repo[base_n].children()
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42 # 2. Commit oldest revision that needs to be pushed
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43 base_revision = svn_commit_hashes[old_ctx.parents()[0].node()][0]
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44 commit_from_rev(ui, repo, old_ctx, hge, svn_url, base_revision)
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45 # 3. Fetch revisions from svn
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46 r = fetch_command.fetch_revisions(ui, svn_url, hg_repo_path)
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47 assert not r or r == 0
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48 # 4. Find the new head of the target branch
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49 repo = hg.repository(ui, hge.path)
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50 base_c = repo[base_n]
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51 replacement = [c for c in base_c.children() if c not in old_children
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52 and c.branch() == old_ctx.branch()]
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53 assert len(replacement) == 1
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54 replacement = replacement[0]
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55 # 5. Rebase all children of the currently-pushing rev to the new branch
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56 heads = repo.heads(old_ctx.node())
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57 for needs_transplant in heads:
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58 hg.clean(repo, needs_transplant)
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59 utility_commands.rebase_commits(ui, repo, hg_repo_path, **opts)
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60 repo = hg.repository(ui, hge.path)
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61 if needs_transplant in outgoing:
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62 hg.clean(repo, repo['tip'].node())
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63 hge = hg_delta_editor.HgChangeReceiver(hg_repo_path, ui_=ui)
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64 svn_commit_hashes = dict(zip(hge.revmap.itervalues(),
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65 hge.revmap.iterkeys()))
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66 outgoing = utility_commands.outgoing_revisions(ui, repo, hge,
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67 svn_commit_hashes)
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68 merc_util._encoding = oldencoding
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69 return 0
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71
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72 def _findmissing(dirname, svn, branch_path):
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73 """Find missing directories in svn. dirname *must* end in a /
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74 """
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75 assert dirname[-1] == '/'
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76 missing = []
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77 keep_checking = True
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78 # check and see if the dir exists svn-side.
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79 path = dirname
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80 while keep_checking:
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81 try:
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82 assert svn.list_dir('%s/%s' % (branch_path, path))
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83 keep_checking = False
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84 except core.SubversionException, e:
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85 # dir must not exist
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86 missing.append(path[:-1])
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87 path = '/'.join(path.split('/')[:-2] + [''])
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88 return missing
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89
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90 def commit_from_rev(ui, repo, rev_ctx, hg_editor, svn_url, base_revision):
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91 """Build and send a commit from Mercurial to Subversion.
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92 """
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93 file_data = {}
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94 svn = svnwrap.SubversionRepo(svn_url, username=merc_util.getuser())
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95 parent = rev_ctx.parents()[0]
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96 parent_branch = rev_ctx.parents()[0].branch()
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97 branch_path = 'trunk'
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98
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99 if parent_branch and parent_branch != 'default':
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100 branch_path = 'branches/%s' % parent_branch
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101
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102 added_dirs = []
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103 props = {}
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104 copies = {}
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105 for file in rev_ctx.files():
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106 new_data = base_data = ''
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107 action = ''
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108 if file in rev_ctx:
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109 fctx = rev_ctx.filectx(file)
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110 new_data = fctx.data()
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111
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112 if 'x' in fctx.flags():
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113 props.setdefault(file, {})['svn:executable'] = '*'
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114 if 'l' in fctx.flags():
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115 props.setdefault(file, {})['svn:special'] = '*'
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116
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117 if file not in parent:
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118 renamed = fctx.renamed()
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119 if renamed:
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120 # TODO current model (and perhaps svn model) does not support
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121 # this kind of renames: a -> b, b -> c
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122 copies[file] = renamed[0]
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123 base_data = parent[renamed[0]].data()
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124
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125 action = 'add'
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126 dirname = '/'.join(file.split('/')[:-1] + [''])
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127 # check for new directories
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128 if not list(parent.walk(util.PrefixMatch(dirname))):
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129 added_dirs += _findmissing(dirname, svn, branch_path)
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130 else:
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131 base_data = parent.filectx(file).data()
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132 if ('x' in parent.filectx(file).flags()
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133 and 'x' not in rev_ctx.filectx(file).flags()):
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134 props.setdefault(file, {})['svn:executable'] = None
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135 if ('l' in parent.filectx(file).flags()
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136 and 'l' not in rev_ctx.filectx(file).flags()):
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137 props.setdefault(file, {})['svn:special'] = None
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138 action = 'modify'
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139 else:
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140 base_data = parent.filectx(file).data()
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141 action = 'delete'
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142 file_data[file] = base_data, new_data, action
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143
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144 # TODO check for directory deletes here
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145 def svnpath(p):
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146 return '%s/%s' % (branch_path, p)
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147
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148 newcopies = {}
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149 for source, dest in copies.iteritems():
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150 newcopies[svnpath(source)] = (svnpath(dest), base_revision)
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151
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152 new_target_files = [svnpath(f) for f in rev_ctx.files()]
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153 for tf, ntf in zip(rev_ctx.files(), new_target_files):
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154 if tf in file_data:
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155 file_data[ntf] = file_data[tf]
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156 if tf in props:
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157 props[ntf] = props[tf]
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158 del props[tf]
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159 if merc_util.binary(file_data[ntf][1]):
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160 props.setdefault(ntf, {}).update(props.get(ntf, {}))
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161 props.setdefault(ntf, {})['svn:mime-type'] = 'application/octet-stream'
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162 del file_data[tf]
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163 added_dirs = ['%s/%s' % (branch_path, f) for f in added_dirs]
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164 added_dirs = set(added_dirs)
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165 new_target_files += added_dirs
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166 try:
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167 svn.commit(new_target_files, rev_ctx.description(), file_data,
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168 base_revision, set(added_dirs), props, newcopies)
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169 except core.SubversionException, e:
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170 if hasattr(e, 'apr_err') and e.apr_err == 160028:
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171 raise merc_util.Abort('Base text was out of date, maybe rebase?')
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172 else:
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173 raise