Mercurial > hg
annotate hgext/largefiles/lfutil.py @ 17659:ae57920ac188 stable
largefiles: enable islfilesrepo() prior to a commit (issue3541)
Previously, even if a file was added with --large, 'hg addremove' or 'hg ci -A'
would add all files (including the previously added large files) as normal
files. Only after a commit where a file was added with --large would subsequent
adds or 'ci -A' take into account the minsize or the pattern configuration.
This change more closely follows the help for largefiles, which mentions that
'add --large' is required to enable the configuration, but doesn't mention the
previously required commit.
Also, if 'hg add --large' was performed and then 'hg forget <file>' (both before
a largefile enabling commit), the forget command would error out saying
'.hglf/<file> not tracked'. This is also fixed.
This reports that a repo is largefiles enabled as soon as a file is added with
--large, which enables 'add', 'addremove' and 'ci -A' to honor the config
settings before the first commit. Note that prior to the next commit, if all
largefiles are forgotten, the repository goes back to reporting the repo as not
largefiles enabled.
It makes no sense to handle this by adding a --large option to 'addremove',
because then it would also be needed for 'commit', but only when '-A' is
specified. While this gets around the awkwardness of having to add a largefile,
then commit it, and then addremove the other files when importing an existing
codebase (and preserving that extra commit in permanent history), it does still
require finding and manually adding one of the files as --large. Therefore it
is probably desirable to have a --large option for init as well.
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Mon, 30 Jul 2012 20:56:41 -0400 |
parents | 32246faba53a |
children | 67deea9c1c42 |
rev | line source |
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15168 | 1 # Copyright 2009-2010 Gregory P. Ward |
2 # Copyright 2009-2010 Intelerad Medical Systems Incorporated | |
3 # Copyright 2010-2011 Fog Creek Software | |
4 # Copyright 2010-2011 Unity Technologies | |
5 # | |
6 # This software may be used and distributed according to the terms of the | |
7 # GNU General Public License version 2 or any later version. | |
8 | |
9 '''largefiles utility code: must not import other modules in this package.''' | |
10 | |
11 import os | |
12 import errno | |
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13 import platform |
15168 | 14 import shutil |
15 import stat | |
16 | |
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17 from mercurial import dirstate, httpconnection, match as match_, util, scmutil |
15168 | 18 from mercurial.i18n import _ |
19 | |
20 shortname = '.hglf' | |
21 longname = 'largefiles' | |
22 | |
23 | |
24 # -- Portability wrappers ---------------------------------------------- | |
25 | |
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26 def dirstatewalk(dirstate, matcher, unknown=False, ignored=False): |
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27 return dirstate.walk(matcher, [], unknown, ignored) |
15168 | 28 |
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29 def repoadd(repo, list): |
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30 add = repo[None].add |
15168 | 31 return add(list) |
32 | |
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33 def reporemove(repo, list, unlink=False): |
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34 def remove(list, unlink): |
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35 wlock = repo.wlock() |
15168 | 36 try: |
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37 if unlink: |
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38 for f in list: |
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39 try: |
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40 util.unlinkpath(repo.wjoin(f)) |
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41 except OSError, inst: |
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42 if inst.errno != errno.ENOENT: |
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43 raise |
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44 repo[None].forget(list) |
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45 finally: |
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46 wlock.release() |
15168 | 47 return remove(list, unlink=unlink) |
48 | |
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49 def repoforget(repo, list): |
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50 forget = repo[None].forget |
15168 | 51 return forget(list) |
52 | |
53 def findoutgoing(repo, remote, force): | |
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54 from mercurial import discovery |
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55 common, _anyinc, _heads = discovery.findcommonincoming(repo, |
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56 remote.peer(), force=force) |
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57 return repo.changelog.findmissing(common) |
15168 | 58 |
59 # -- Private worker functions ------------------------------------------ | |
60 | |
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61 def getminsize(ui, assumelfiles, opt, default=10): |
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62 lfsize = opt |
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63 if not lfsize and assumelfiles: |
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64 lfsize = ui.config(longname, 'minsize', default=default) |
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65 if lfsize: |
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66 try: |
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67 lfsize = float(lfsize) |
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68 except ValueError: |
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69 raise util.Abort(_('largefiles: size must be number (not %s)\n') |
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70 % lfsize) |
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71 if lfsize is None: |
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72 raise util.Abort(_('minimum size for largefiles must be specified')) |
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73 return lfsize |
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74 |
15168 | 75 def link(src, dest): |
76 try: | |
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77 util.oslink(src, dest) |
15168 | 78 except OSError: |
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79 # if hardlinks fail, fallback on atomic copy |
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80 dst = util.atomictempfile(dest) |
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81 for chunk in util.filechunkiter(open(src, 'rb')): |
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82 dst.write(chunk) |
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83 dst.close() |
15168 | 84 os.chmod(dest, os.stat(src).st_mode) |
85 | |
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86 def usercachepath(ui, hash): |
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87 path = ui.configpath(longname, 'usercache', None) |
15168 | 88 if path: |
89 path = os.path.join(path, hash) | |
90 else: | |
91 if os.name == 'nt': | |
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92 appdata = os.getenv('LOCALAPPDATA', os.getenv('APPDATA')) |
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93 if appdata: |
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94 path = os.path.join(appdata, longname, hash) |
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95 elif platform.system() == 'Darwin': |
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96 home = os.getenv('HOME') |
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97 if home: |
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98 path = os.path.join(home, 'Library', 'Caches', |
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99 longname, hash) |
15168 | 100 elif os.name == 'posix': |
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101 path = os.getenv('XDG_CACHE_HOME') |
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102 if path: |
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103 path = os.path.join(path, longname, hash) |
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104 else: |
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105 home = os.getenv('HOME') |
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106 if home: |
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107 path = os.path.join(home, '.cache', longname, hash) |
15168 | 108 else: |
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109 raise util.Abort(_('unknown operating system: %s\n') % os.name) |
15168 | 110 return path |
111 | |
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112 def inusercache(ui, hash): |
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113 path = usercachepath(ui, hash) |
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114 return path and os.path.exists(path) |
15168 | 115 |
116 def findfile(repo, hash): | |
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117 if instore(repo, hash): |
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118 repo.ui.note(_('found %s in store\n') % hash) |
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119 return storepath(repo, hash) |
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120 elif inusercache(repo.ui, hash): |
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121 repo.ui.note(_('found %s in system cache\n') % hash) |
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122 path = storepath(repo, hash) |
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123 util.makedirs(os.path.dirname(path)) |
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124 link(usercachepath(repo.ui, hash), path) |
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125 return path |
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126 return None |
15168 | 127 |
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128 class largefilesdirstate(dirstate.dirstate): |
15168 | 129 def __getitem__(self, key): |
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130 return super(largefilesdirstate, self).__getitem__(unixpath(key)) |
15168 | 131 def normal(self, f): |
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132 return super(largefilesdirstate, self).normal(unixpath(f)) |
15168 | 133 def remove(self, f): |
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134 return super(largefilesdirstate, self).remove(unixpath(f)) |
15168 | 135 def add(self, f): |
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136 return super(largefilesdirstate, self).add(unixpath(f)) |
15168 | 137 def drop(self, f): |
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138 return super(largefilesdirstate, self).drop(unixpath(f)) |
15168 | 139 def forget(self, f): |
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140 return super(largefilesdirstate, self).forget(unixpath(f)) |
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141 def normallookup(self, f): |
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142 return super(largefilesdirstate, self).normallookup(unixpath(f)) |
15168 | 143 |
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144 def openlfdirstate(ui, repo, create=True): |
15168 | 145 ''' |
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146 Return a dirstate object that tracks largefiles: i.e. its root is |
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147 the repo root, but it is saved in .hg/largefiles/dirstate. |
15168 | 148 ''' |
149 admin = repo.join(longname) | |
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150 opener = scmutil.opener(admin) |
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151 lfdirstate = largefilesdirstate(opener, ui, repo.root, |
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152 repo.dirstate._validate) |
15168 | 153 |
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154 # If the largefiles dirstate does not exist, populate and create |
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155 # it. This ensures that we create it on the first meaningful |
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156 # largefiles operation in a new clone. |
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157 if create and not os.path.exists(os.path.join(admin, 'dirstate')): |
15168 | 158 util.makedirs(admin) |
159 matcher = getstandinmatcher(repo) | |
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160 for standin in dirstatewalk(repo.dirstate, matcher): |
15168 | 161 lfile = splitstandin(standin) |
162 hash = readstandin(repo, lfile) | |
163 lfdirstate.normallookup(lfile) | |
164 try: | |
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165 if hash == hashfile(repo.wjoin(lfile)): |
15168 | 166 lfdirstate.normal(lfile) |
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167 except OSError, err: |
15168 | 168 if err.errno != errno.ENOENT: |
169 raise | |
170 return lfdirstate | |
171 | |
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172 def lfdirstatestatus(lfdirstate, repo, rev): |
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173 match = match_.always(repo.root, repo.getcwd()) |
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174 s = lfdirstate.status(match, [], False, False, False) |
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175 unsure, modified, added, removed, missing, unknown, ignored, clean = s |
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176 for lfile in unsure: |
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177 if repo[rev][standin(lfile)].data().strip() != \ |
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178 hashfile(repo.wjoin(lfile)): |
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179 modified.append(lfile) |
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180 else: |
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181 clean.append(lfile) |
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182 lfdirstate.normal(lfile) |
15168 | 183 return (modified, added, removed, missing, unknown, ignored, clean) |
184 | |
185 def listlfiles(repo, rev=None, matcher=None): | |
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186 '''return a list of largefiles in the working copy or the |
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187 specified changeset''' |
15168 | 188 |
189 if matcher is None: | |
190 matcher = getstandinmatcher(repo) | |
191 | |
192 # ignore unknown files in working directory | |
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193 return [splitstandin(f) |
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194 for f in repo[rev].walk(matcher) |
15168 | 195 if rev is not None or repo.dirstate[f] != '?'] |
196 | |
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197 def instore(repo, hash): |
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198 return os.path.exists(storepath(repo, hash)) |
15168 | 199 |
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200 def storepath(repo, hash): |
15168 | 201 return repo.join(os.path.join(longname, hash)) |
202 | |
203 def copyfromcache(repo, hash, filename): | |
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204 '''Copy the specified largefile from the repo or system cache to |
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205 filename in the repository. Return true on success or false if the |
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206 file was not found in either cache (which should not happened: |
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207 this is meant to be called only after ensuring that the needed |
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208 largefile exists in the cache).''' |
15168 | 209 path = findfile(repo, hash) |
210 if path is None: | |
211 return False | |
212 util.makedirs(os.path.dirname(repo.wjoin(filename))) | |
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213 # The write may fail before the file is fully written, but we |
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214 # don't use atomic writes in the working copy. |
15168 | 215 shutil.copy(path, repo.wjoin(filename)) |
216 return True | |
217 | |
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218 def copytostore(repo, rev, file, uploaded=False): |
15168 | 219 hash = readstandin(repo, file) |
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220 if instore(repo, hash): |
15168 | 221 return |
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222 copytostoreabsolute(repo, repo.wjoin(file), hash) |
15168 | 223 |
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224 def copyalltostore(repo, node): |
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225 '''Copy all largefiles in a given revision to the store''' |
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226 |
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227 ctx = repo[node] |
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228 for filename in ctx.files(): |
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229 if isstandin(filename) and filename in ctx.manifest(): |
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230 realfile = splitstandin(filename) |
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231 copytostore(repo, ctx.node(), realfile) |
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232 |
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233 |
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234 def copytostoreabsolute(repo, file, hash): |
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235 util.makedirs(os.path.dirname(storepath(repo, hash))) |
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236 if inusercache(repo.ui, hash): |
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237 link(usercachepath(repo.ui, hash), storepath(repo, hash)) |
15168 | 238 else: |
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239 dst = util.atomictempfile(storepath(repo, hash), |
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240 createmode=repo.store.createmode) |
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241 for chunk in util.filechunkiter(open(file, 'rb')): |
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242 dst.write(chunk) |
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243 dst.close() |
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244 linktousercache(repo, hash) |
15168 | 245 |
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246 def linktousercache(repo, hash): |
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247 path = usercachepath(repo.ui, hash) |
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248 if path: |
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249 util.makedirs(os.path.dirname(path)) |
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250 link(storepath(repo, hash), path) |
15168 | 251 |
252 def getstandinmatcher(repo, pats=[], opts={}): | |
253 '''Return a match object that applies pats to the standin directory''' | |
254 standindir = repo.pathto(shortname) | |
255 if pats: | |
256 # patterns supplied: search standin directory relative to current dir | |
257 cwd = repo.getcwd() | |
258 if os.path.isabs(cwd): | |
259 # cwd is an absolute path for hg -R <reponame> | |
260 # work relative to the repository root in this case | |
261 cwd = '' | |
262 pats = [os.path.join(standindir, cwd, pat) for pat in pats] | |
263 elif os.path.isdir(standindir): | |
264 # no patterns: relative to repo root | |
265 pats = [standindir] | |
266 else: | |
267 # no patterns and no standin dir: return matcher that matches nothing | |
268 match = match_.match(repo.root, None, [], exact=True) | |
269 match.matchfn = lambda f: False | |
270 return match | |
271 return getmatcher(repo, pats, opts, showbad=False) | |
272 | |
273 def getmatcher(repo, pats=[], opts={}, showbad=True): | |
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274 '''Wrapper around scmutil.match() that adds showbad: if false, |
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275 neuter the match object's bad() method so it does not print any |
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276 warnings about missing files or directories.''' |
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277 match = scmutil.match(repo[None], pats, opts) |
15168 | 278 |
279 if not showbad: | |
280 match.bad = lambda f, msg: None | |
281 return match | |
282 | |
283 def composestandinmatcher(repo, rmatcher): | |
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284 '''Return a matcher that accepts standins corresponding to the |
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285 files accepted by rmatcher. Pass the list of files in the matcher |
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286 as the paths specified by the user.''' |
15168 | 287 smatcher = getstandinmatcher(repo, rmatcher.files()) |
288 isstandin = smatcher.matchfn | |
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289 def composedmatchfn(f): |
15168 | 290 return isstandin(f) and rmatcher.matchfn(splitstandin(f)) |
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291 smatcher.matchfn = composedmatchfn |
15168 | 292 |
293 return smatcher | |
294 | |
295 def standin(filename): | |
296 '''Return the repo-relative path to the standin for the specified big | |
297 file.''' | |
298 # Notes: | |
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299 # 1) Most callers want an absolute path, but _createstandin() needs |
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300 # it repo-relative so lfadd() can pass it to repoadd(). So leave |
15168 | 301 # it up to the caller to use repo.wjoin() to get an absolute path. |
302 # 2) Join with '/' because that's what dirstate always uses, even on | |
303 # Windows. Change existing separator to '/' first in case we are | |
304 # passed filenames from an external source (like the command line). | |
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305 return shortname + '/' + util.pconvert(filename) |
15168 | 306 |
307 def isstandin(filename): | |
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308 '''Return true if filename is a big file standin. filename must be |
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309 in Mercurial's internal form (slash-separated).''' |
15168 | 310 return filename.startswith(shortname + '/') |
311 | |
312 def splitstandin(filename): | |
313 # Split on / because that's what dirstate always uses, even on Windows. | |
314 # Change local separator to / first just in case we are passed filenames | |
315 # from an external source (like the command line). | |
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316 bits = util.pconvert(filename).split('/', 1) |
15168 | 317 if len(bits) == 2 and bits[0] == shortname: |
318 return bits[1] | |
319 else: | |
320 return None | |
321 | |
322 def updatestandin(repo, standin): | |
323 file = repo.wjoin(splitstandin(standin)) | |
324 if os.path.exists(file): | |
325 hash = hashfile(file) | |
326 executable = getexecutable(file) | |
327 writestandin(repo, standin, hash, executable) | |
328 | |
329 def readstandin(repo, filename, node=None): | |
330 '''read hex hash from standin for filename at given node, or working | |
331 directory if no node is given''' | |
332 return repo[node][standin(filename)].data().strip() | |
333 | |
334 def writestandin(repo, standin, hash, executable): | |
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335 '''write hash to <repo.root>/<standin>''' |
15168 | 336 writehash(hash, repo.wjoin(standin), executable) |
337 | |
338 def copyandhash(instream, outfile): | |
339 '''Read bytes from instream (iterable) and write them to outfile, | |
340 computing the SHA-1 hash of the data along the way. Close outfile | |
341 when done and return the binary hash.''' | |
342 hasher = util.sha1('') | |
343 for data in instream: | |
344 hasher.update(data) | |
345 outfile.write(data) | |
346 | |
347 # Blecch: closing a file that somebody else opened is rude and | |
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348 # wrong. But it's so darn convenient and practical! After all, |
15168 | 349 # outfile was opened just to copy and hash. |
350 outfile.close() | |
351 | |
352 return hasher.digest() | |
353 | |
354 def hashrepofile(repo, file): | |
355 return hashfile(repo.wjoin(file)) | |
356 | |
357 def hashfile(file): | |
358 if not os.path.exists(file): | |
359 return '' | |
360 hasher = util.sha1('') | |
361 fd = open(file, 'rb') | |
362 for data in blockstream(fd): | |
363 hasher.update(data) | |
364 fd.close() | |
365 return hasher.hexdigest() | |
366 | |
367 class limitreader(object): | |
368 def __init__(self, f, limit): | |
369 self.f = f | |
370 self.limit = limit | |
371 | |
372 def read(self, length): | |
373 if self.limit == 0: | |
374 return '' | |
375 length = length > self.limit and self.limit or length | |
376 self.limit -= length | |
377 return self.f.read(length) | |
378 | |
379 def close(self): | |
380 pass | |
381 | |
382 def blockstream(infile, blocksize=128 * 1024): | |
383 """Generator that yields blocks of data from infile and closes infile.""" | |
384 while True: | |
385 data = infile.read(blocksize) | |
386 if not data: | |
387 break | |
388 yield data | |
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389 # same blecch as copyandhash() above |
15168 | 390 infile.close() |
391 | |
392 def writehash(hash, filename, executable): | |
393 util.makedirs(os.path.dirname(filename)) | |
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394 util.writefile(filename, hash + '\n') |
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395 os.chmod(filename, getmode(executable)) |
15168 | 396 |
397 def getexecutable(filename): | |
398 mode = os.stat(filename).st_mode | |
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399 return ((mode & stat.S_IXUSR) and |
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400 (mode & stat.S_IXGRP) and |
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401 (mode & stat.S_IXOTH)) |
15168 | 402 |
403 def getmode(executable): | |
404 if executable: | |
405 return 0755 | |
406 else: | |
407 return 0644 | |
408 | |
409 def urljoin(first, second, *arg): | |
410 def join(left, right): | |
411 if not left.endswith('/'): | |
412 left += '/' | |
413 if right.startswith('/'): | |
414 right = right[1:] | |
415 return left + right | |
416 | |
417 url = join(first, second) | |
418 for a in arg: | |
419 url = join(url, a) | |
420 return url | |
421 | |
422 def hexsha1(data): | |
423 """hexsha1 returns the hex-encoded sha1 sum of the data in the file-like | |
424 object data""" | |
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425 h = util.sha1() |
15168 | 426 for chunk in util.filechunkiter(data): |
427 h.update(chunk) | |
428 return h.hexdigest() | |
429 | |
430 def httpsendfile(ui, filename): | |
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431 return httpconnection.httpsendfile(ui, filename, 'rb') |
15168 | 432 |
433 def unixpath(path): | |
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434 '''Return a version of path normalized for use with the lfdirstate.''' |
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435 return util.pconvert(os.path.normpath(path)) |
15168 | 436 |
437 def islfilesrepo(repo): | |
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438 if ('largefiles' in repo.requirements and |
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439 util.any(shortname + '/' in f[0] for f in repo.store.datafiles())): |
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440 return True |
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441 |
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442 return util.any(openlfdirstate(repo.ui, repo, False)) |
15168 | 443 |
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444 class storeprotonotcapable(Exception): |
15168 | 445 def __init__(self, storetypes): |
446 self.storetypes = storetypes | |
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447 |
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448 def getcurrentheads(repo): |
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449 branches = repo.branchmap() |
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450 heads = [] |
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451 for branch in branches: |
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452 newheads = repo.branchheads(branch) |
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453 heads = heads + newheads |
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454 return heads |
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455 |
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456 def getstandinsstate(repo): |
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457 standins = [] |
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458 matcher = getstandinmatcher(repo) |
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459 for standin in dirstatewalk(repo.dirstate, matcher): |
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460 lfile = splitstandin(standin) |
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461 standins.append((lfile, readstandin(repo, lfile))) |
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462 return standins |
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463 |
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464 def getlfilestoupdate(oldstandins, newstandins): |
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465 changedstandins = set(oldstandins).symmetric_difference(set(newstandins)) |
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466 filelist = [] |
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467 for f in changedstandins: |
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468 if f[0] not in filelist: |
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469 filelist.append(f[0]) |
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470 return filelist |