Mercurial > hg
annotate mercurial/hg.py @ 5339:058e93c3d07d
I have spotted the biggest bottleneck in "bdiff.c". Actually it was
pretty easy to find after I recompiled the python interpreter and
mercurial for profiling.
In "bdiff.c" function "equatelines" allocates the minimum hash table
size, which can lead to tons of collisions. I introduced an
"overcommit" factor of 16, this is, I allocate 16 times more memory
than the minimum value. Overcommiting 128 times does not improve the
performance over the 16-times case.
author | Christoph Spiel <cspiel@freenet.de> |
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date | Thu, 27 Sep 2007 23:57:57 -0500 |
parents | a32a8e50d233 |
children | 9e209193f18d 3b96cefc1b2b |
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1 # hg.py - repository classes for mercurial |
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2 # |
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
2859 | 4 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> |
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5 # |
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6 # This software may be used and distributed according to the terms |
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7 # of the GNU General Public License, incorporated herein by reference. |
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8 |
1089 | 9 from node import * |
10 from repo import * | |
3891 | 11 from i18n import _ |
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12 import localrepo, bundlerepo, httprepo, sshrepo, statichttprepo |
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13 import errno, lock, os, shutil, util, extensions |
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14 import merge as _merge |
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15 import verify as _verify |
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16 |
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17 def _local(path): |
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18 return (os.path.isfile(util.drop_scheme('file', path)) and |
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19 bundlerepo or localrepo) |
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20 |
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21 def parseurl(url, revs): |
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22 '''parse url#branch, returning url, branch + revs''' |
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23 |
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24 if '#' not in url: |
5248 | 25 return url, (revs or None), None |
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26 |
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27 url, rev = url.split('#', 1) |
5248 | 28 return url, revs + [rev], rev |
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29 |
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30 schemes = { |
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31 'bundle': bundlerepo, |
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32 'file': _local, |
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33 'http': httprepo, |
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34 'https': httprepo, |
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35 'ssh': sshrepo, |
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36 'static-http': statichttprepo, |
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37 } |
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38 |
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39 def _lookup(path): |
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40 scheme = 'file' |
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41 if path: |
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42 c = path.find(':') |
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43 if c > 0: |
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44 scheme = path[:c] |
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45 thing = schemes.get(scheme) or schemes['file'] |
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46 try: |
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47 return thing(path) |
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48 except TypeError: |
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49 return thing |
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50 |
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51 def islocal(repo): |
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52 '''return true if repo or path is local''' |
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53 if isinstance(repo, str): |
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54 try: |
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55 return _lookup(repo).islocal(repo) |
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56 except AttributeError: |
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57 return False |
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58 return repo.local() |
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59 |
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60 def repository(ui, path='', create=False): |
2774 | 61 """return a repository object for the specified path""" |
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62 repo = _lookup(path).instance(ui, path, create) |
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63 ui = getattr(repo, "ui", ui) |
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64 for name, module in extensions.extensions(): |
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65 hook = getattr(module, 'reposetup', None) |
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66 if hook: |
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67 hook(ui, repo) |
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68 return repo |
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69 |
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70 def defaultdest(source): |
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71 '''return default destination of clone if none is given''' |
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72 return os.path.basename(os.path.normpath(source)) |
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74 def clone(ui, source, dest=None, pull=False, rev=None, update=True, |
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75 stream=False): |
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76 """Make a copy of an existing repository. |
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77 |
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78 Create a copy of an existing repository in a new directory. The |
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79 source and destination are URLs, as passed to the repository |
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80 function. Returns a pair of repository objects, the source and |
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81 newly created destination. |
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82 |
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83 The location of the source is added to the new repository's |
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84 .hg/hgrc file, as the default to be used for future pulls and |
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85 pushes. |
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86 |
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87 If an exception is raised, the partly cloned/updated destination |
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88 repository will be deleted. |
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89 |
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90 Arguments: |
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91 |
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92 source: repository object or URL |
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93 |
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94 dest: URL of destination repository to create (defaults to base |
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95 name of source repository) |
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96 |
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97 pull: always pull from source repository, even in local case |
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98 |
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99 stream: stream raw data uncompressed from repository (fast over |
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100 LAN, slow over WAN) |
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101 |
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102 rev: revision to clone up to (implies pull=True) |
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103 |
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104 update: update working directory after clone completes, if |
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105 destination is local repository |
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106 """ |
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107 |
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108 origsource = source |
5248 | 109 source, rev, checkout = parseurl(ui.expandpath(source), rev) |
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110 |
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111 if isinstance(source, str): |
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112 src_repo = repository(ui, source) |
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113 else: |
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114 src_repo = source |
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115 source = src_repo.url() |
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116 |
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117 if dest is None: |
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118 dest = defaultdest(source) |
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119 ui.status(_("destination directory: %s\n") % dest) |
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120 |
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121 def localpath(path): |
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122 if path.startswith('file://'): |
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123 return path[7:] |
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124 if path.startswith('file:'): |
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125 return path[5:] |
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126 return path |
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127 |
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128 dest = localpath(dest) |
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129 source = localpath(source) |
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130 |
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131 if os.path.exists(dest): |
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132 raise util.Abort(_("destination '%s' already exists") % dest) |
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133 |
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134 class DirCleanup(object): |
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135 def __init__(self, dir_): |
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136 self.rmtree = shutil.rmtree |
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137 self.dir_ = dir_ |
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138 def close(self): |
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139 self.dir_ = None |
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140 def __del__(self): |
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141 if self.dir_: |
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142 self.rmtree(self.dir_, True) |
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143 |
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144 src_lock = dest_lock = dir_cleanup = None |
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145 try: |
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146 if islocal(dest): |
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147 dir_cleanup = DirCleanup(dest) |
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148 |
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149 abspath = origsource |
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150 copy = False |
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151 if src_repo.local() and islocal(dest): |
5248 | 152 abspath = os.path.abspath(util.drop_scheme('file', origsource)) |
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153 copy = not pull and not rev |
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154 |
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155 if copy: |
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156 try: |
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157 # we use a lock here because if we race with commit, we |
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158 # can end up with extra data in the cloned revlogs that's |
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159 # not pointed to by changesets, thus causing verify to |
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160 # fail |
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161 src_lock = src_repo.lock() |
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162 except lock.LockException: |
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163 copy = False |
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164 |
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165 if copy: |
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166 def force_copy(src, dst): |
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167 try: |
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168 util.copyfiles(src, dst) |
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169 except OSError, inst: |
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170 if inst.errno != errno.ENOENT: |
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171 raise |
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172 |
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173 src_store = os.path.realpath(src_repo.spath) |
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174 if not os.path.exists(dest): |
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175 os.mkdir(dest) |
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176 dest_path = os.path.realpath(os.path.join(dest, ".hg")) |
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177 os.mkdir(dest_path) |
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178 if src_repo.spath != src_repo.path: |
5277 | 179 # XXX racy |
180 dummy_changelog = os.path.join(dest_path, "00changelog.i") | |
181 # copy the dummy changelog | |
182 force_copy(src_repo.join("00changelog.i"), dummy_changelog) | |
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183 dest_store = os.path.join(dest_path, "store") |
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184 os.mkdir(dest_store) |
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185 else: |
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186 dest_store = dest_path |
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187 # copy the requires file |
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188 force_copy(src_repo.join("requires"), |
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189 os.path.join(dest_path, "requires")) |
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190 # we lock here to avoid premature writing to the target |
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191 dest_lock = lock.lock(os.path.join(dest_store, "lock")) |
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192 |
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193 files = ("data", |
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194 "00manifest.d", "00manifest.i", |
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195 "00changelog.d", "00changelog.i") |
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196 for f in files: |
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197 src = os.path.join(src_store, f) |
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198 dst = os.path.join(dest_store, f) |
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199 force_copy(src, dst) |
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200 |
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201 # we need to re-init the repo after manually copying the data |
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202 # into it |
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203 dest_repo = repository(ui, dest) |
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204 |
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205 else: |
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206 dest_repo = repository(ui, dest, create=True) |
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207 |
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208 revs = None |
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209 if rev: |
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210 if 'lookup' not in src_repo.capabilities: |
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211 raise util.Abort(_("src repository does not support revision " |
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212 "lookup and so doesn't support clone by " |
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213 "revision")) |
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214 revs = [src_repo.lookup(r) for r in rev] |
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215 |
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216 if dest_repo.local(): |
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217 dest_repo.clone(src_repo, heads=revs, stream=stream) |
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218 elif src_repo.local(): |
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219 src_repo.push(dest_repo, revs=revs) |
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220 else: |
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221 raise util.Abort(_("clone from remote to remote not supported")) |
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222 |
5186 | 223 if dir_cleanup: |
224 dir_cleanup.close() | |
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225 |
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226 if dest_repo.local(): |
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227 fp = dest_repo.opener("hgrc", "w", text=True) |
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228 fp.write("[paths]\n") |
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229 fp.write("default = %s\n" % abspath) |
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230 fp.close() |
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231 |
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232 if update: |
5248 | 233 if not checkout: |
234 try: | |
235 checkout = dest_repo.lookup("default") | |
236 except: | |
237 checkout = dest_repo.changelog.tip() | |
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238 _update(dest_repo, checkout) |
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239 |
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240 return src_repo, dest_repo |
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241 finally: |
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242 del src_lock, dest_lock, dir_cleanup |
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243 |
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244 def _showstats(repo, stats): |
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245 stats = ((stats[0], _("updated")), |
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246 (stats[1], _("merged")), |
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247 (stats[2], _("removed")), |
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248 (stats[3], _("unresolved"))) |
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249 note = ", ".join([_("%d files %s") % s for s in stats]) |
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250 repo.ui.status("%s\n" % note) |
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251 |
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252 def _update(repo, node): return update(repo, node) |
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253 |
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254 def update(repo, node): |
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255 """update the working directory to node, merging linear changes""" |
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256 pl = repo.parents() |
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257 stats = _merge.update(repo, node, False, False, None) |
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258 _showstats(repo, stats) |
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259 if stats[3]: |
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260 repo.ui.status(_("There are unresolved merges with" |
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261 " locally modified files.\n")) |
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262 if stats[1]: |
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263 repo.ui.status(_("You can finish the partial merge using:\n")) |
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264 else: |
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265 repo.ui.status(_("You can redo the full merge using:\n")) |
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266 # len(pl)==1, otherwise _merge.update() would have raised util.Abort: |
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267 repo.ui.status(_(" hg update %s\n hg update %s\n") |
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268 % (pl[0].rev(), repo.changectx(node).rev())) |
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269 return stats[3] |
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270 |
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271 def clean(repo, node, show_stats=True): |
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272 """forcibly switch the working directory to node, clobbering changes""" |
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273 stats = _merge.update(repo, node, False, True, None) |
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274 if show_stats: _showstats(repo, stats) |
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275 return stats[3] |
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276 |
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277 def merge(repo, node, force=None, remind=True): |
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278 """branch merge with node, resolving changes""" |
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279 stats = _merge.update(repo, node, True, force, False) |
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280 _showstats(repo, stats) |
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281 if stats[3]: |
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282 pl = repo.parents() |
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283 repo.ui.status(_("There are unresolved merges," |
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284 " you can redo the full merge using:\n" |
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285 " hg update -C %s\n" |
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286 " hg merge %s\n") |
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287 % (pl[0].rev(), pl[1].rev())) |
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288 elif remind: |
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289 repo.ui.status(_("(branch merge, don't forget to commit)\n")) |
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290 return stats[3] |
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291 |
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292 def revert(repo, node, choose): |
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293 """revert changes to revision in node without updating dirstate""" |
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294 return _merge.update(repo, node, False, True, choose)[3] |
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296 def verify(repo): | |
297 """verify the consistency of a repository""" | |
298 return _verify.verify(repo) |