Mercurial > hg
annotate hgext/largefiles/lfutil.py @ 17878:d1d0140287b8 stable
largefiles: don't copy largefiles from working dir to the store while converting
Previously, if one or more largefiles for a repo being converted were not in the
usercache, the convert would abort with a reference to the largefile being
missing (as opposed to the previous patch, where the standin was referenced as
missing). This is because commitctx() tries to copy all largefiles to the
local store, first from the user cache, and if the file isn't found there, from
the working directory. No files will exist in the working directory during a
convert, however. It is not sufficient to force the source repo to be local
before proceeding, because clone and pull do not download largefiles by default.
This is slightly less than ideal because while the conversion will now complete,
it won't be possible to update to revs with missing largefiles unless the user
intervenes manually, because there is no default path pointing back to the
source repo. Ideally these files would be cached during the conversion.
This check could have been done in reposetup.commitctx() instead, but this
ensures the local store directory is created, which is necessary to enable the
standin matcher.
The rm -> 'rm -f' change in the test is to temporarily suppress an error
clearing the cache- as noted, the cache is is not repopulated during convert.
When that is fixed, this can be changed back and the verification errors will
disappear too.
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Tue, 23 Oct 2012 21:32:19 -0400 |
parents | 92bbb21d4b13 |
children | 242d2f4ec01c |
rev | line source |
---|---|
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 outgoing = discovery.findcommonoutgoing(repo, remote.peer(), force=force) |
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56 return outgoing.missing |
15168 | 57 |
58 # -- Private worker functions ------------------------------------------ | |
59 | |
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60 def getminsize(ui, assumelfiles, opt, default=10): |
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61 lfsize = opt |
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62 if not lfsize and assumelfiles: |
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63 lfsize = ui.config(longname, 'minsize', default=default) |
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64 if lfsize: |
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65 try: |
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66 lfsize = float(lfsize) |
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67 except ValueError: |
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68 raise util.Abort(_('largefiles: size must be number (not %s)\n') |
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69 % lfsize) |
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70 if lfsize is None: |
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71 raise util.Abort(_('minimum size for largefiles must be specified')) |
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72 return lfsize |
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73 |
15168 | 74 def link(src, dest): |
75 try: | |
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76 util.oslink(src, dest) |
15168 | 77 except OSError: |
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78 # if hardlinks fail, fallback on atomic copy |
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79 dst = util.atomictempfile(dest) |
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80 for chunk in util.filechunkiter(open(src, 'rb')): |
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81 dst.write(chunk) |
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82 dst.close() |
15168 | 83 os.chmod(dest, os.stat(src).st_mode) |
84 | |
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85 def usercachepath(ui, hash): |
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86 path = ui.configpath(longname, 'usercache', None) |
15168 | 87 if path: |
88 path = os.path.join(path, hash) | |
89 else: | |
90 if os.name == 'nt': | |
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91 appdata = os.getenv('LOCALAPPDATA', os.getenv('APPDATA')) |
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92 if appdata: |
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93 path = os.path.join(appdata, longname, hash) |
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94 elif platform.system() == 'Darwin': |
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95 home = os.getenv('HOME') |
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96 if home: |
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97 path = os.path.join(home, 'Library', 'Caches', |
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98 longname, hash) |
15168 | 99 elif os.name == 'posix': |
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100 path = os.getenv('XDG_CACHE_HOME') |
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101 if path: |
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102 path = os.path.join(path, longname, hash) |
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103 else: |
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104 home = os.getenv('HOME') |
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105 if home: |
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106 path = os.path.join(home, '.cache', longname, hash) |
15168 | 107 else: |
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108 raise util.Abort(_('unknown operating system: %s\n') % os.name) |
15168 | 109 return path |
110 | |
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111 def inusercache(ui, hash): |
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112 path = usercachepath(ui, hash) |
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113 return path and os.path.exists(path) |
15168 | 114 |
115 def findfile(repo, hash): | |
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116 if instore(repo, hash): |
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117 repo.ui.note(_('found %s in store\n') % hash) |
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118 return storepath(repo, hash) |
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119 elif inusercache(repo.ui, hash): |
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120 repo.ui.note(_('found %s in system cache\n') % hash) |
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121 path = storepath(repo, hash) |
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122 util.makedirs(os.path.dirname(path)) |
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123 link(usercachepath(repo.ui, hash), path) |
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124 return path |
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125 return None |
15168 | 126 |
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127 class largefilesdirstate(dirstate.dirstate): |
15168 | 128 def __getitem__(self, key): |
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129 return super(largefilesdirstate, self).__getitem__(unixpath(key)) |
15168 | 130 def normal(self, f): |
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131 return super(largefilesdirstate, self).normal(unixpath(f)) |
15168 | 132 def remove(self, f): |
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133 return super(largefilesdirstate, self).remove(unixpath(f)) |
15168 | 134 def add(self, f): |
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135 return super(largefilesdirstate, self).add(unixpath(f)) |
15168 | 136 def drop(self, f): |
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137 return super(largefilesdirstate, self).drop(unixpath(f)) |
15168 | 138 def forget(self, f): |
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139 return super(largefilesdirstate, self).forget(unixpath(f)) |
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140 def normallookup(self, f): |
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141 return super(largefilesdirstate, self).normallookup(unixpath(f)) |
15168 | 142 |
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143 def openlfdirstate(ui, repo, create=True): |
15168 | 144 ''' |
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145 Return a dirstate object that tracks largefiles: i.e. its root is |
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146 the repo root, but it is saved in .hg/largefiles/dirstate. |
15168 | 147 ''' |
148 admin = repo.join(longname) | |
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149 opener = scmutil.opener(admin) |
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150 lfdirstate = largefilesdirstate(opener, ui, repo.root, |
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151 repo.dirstate._validate) |
15168 | 152 |
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153 # If the largefiles dirstate does not exist, populate and create |
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154 # it. This ensures that we create it on the first meaningful |
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155 # largefiles operation in a new clone. |
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156 if create and not os.path.exists(os.path.join(admin, 'dirstate')): |
15168 | 157 util.makedirs(admin) |
158 matcher = getstandinmatcher(repo) | |
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159 for standin in dirstatewalk(repo.dirstate, matcher): |
15168 | 160 lfile = splitstandin(standin) |
161 hash = readstandin(repo, lfile) | |
162 lfdirstate.normallookup(lfile) | |
163 try: | |
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164 if hash == hashfile(repo.wjoin(lfile)): |
15168 | 165 lfdirstate.normal(lfile) |
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166 except OSError, err: |
15168 | 167 if err.errno != errno.ENOENT: |
168 raise | |
169 return lfdirstate | |
170 | |
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171 def lfdirstatestatus(lfdirstate, repo, rev): |
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172 match = match_.always(repo.root, repo.getcwd()) |
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173 s = lfdirstate.status(match, [], False, False, False) |
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174 unsure, modified, added, removed, missing, unknown, ignored, clean = s |
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175 for lfile in unsure: |
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176 if repo[rev][standin(lfile)].data().strip() != \ |
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177 hashfile(repo.wjoin(lfile)): |
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178 modified.append(lfile) |
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179 else: |
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180 clean.append(lfile) |
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181 lfdirstate.normal(lfile) |
15168 | 182 return (modified, added, removed, missing, unknown, ignored, clean) |
183 | |
184 def listlfiles(repo, rev=None, matcher=None): | |
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185 '''return a list of largefiles in the working copy or the |
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186 specified changeset''' |
15168 | 187 |
188 if matcher is None: | |
189 matcher = getstandinmatcher(repo) | |
190 | |
191 # ignore unknown files in working directory | |
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192 return [splitstandin(f) |
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193 for f in repo[rev].walk(matcher) |
15168 | 194 if rev is not None or repo.dirstate[f] != '?'] |
195 | |
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196 def instore(repo, hash): |
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197 return os.path.exists(storepath(repo, hash)) |
15168 | 198 |
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199 def storepath(repo, hash): |
15168 | 200 return repo.join(os.path.join(longname, hash)) |
201 | |
202 def copyfromcache(repo, hash, filename): | |
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203 '''Copy the specified largefile from the repo or system cache to |
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204 filename in the repository. Return true on success or false if the |
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205 file was not found in either cache (which should not happened: |
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206 this is meant to be called only after ensuring that the needed |
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207 largefile exists in the cache).''' |
15168 | 208 path = findfile(repo, hash) |
209 if path is None: | |
210 return False | |
211 util.makedirs(os.path.dirname(repo.wjoin(filename))) | |
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212 # The write may fail before the file is fully written, but we |
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213 # don't use atomic writes in the working copy. |
15168 | 214 shutil.copy(path, repo.wjoin(filename)) |
215 return True | |
216 | |
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217 def copytostore(repo, rev, file, uploaded=False): |
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218 hash = readstandin(repo, file, rev) |
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219 if instore(repo, hash): |
15168 | 220 return |
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221 copytostoreabsolute(repo, repo.wjoin(file), hash) |
15168 | 222 |
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223 def copyalltostore(repo, node): |
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224 '''Copy all largefiles in a given revision to the store''' |
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225 |
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226 ctx = repo[node] |
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227 for filename in ctx.files(): |
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228 if isstandin(filename) and filename in ctx.manifest(): |
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229 realfile = splitstandin(filename) |
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230 copytostore(repo, ctx.node(), realfile) |
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231 |
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232 |
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233 def copytostoreabsolute(repo, file, hash): |
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234 util.makedirs(os.path.dirname(storepath(repo, hash))) |
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235 if inusercache(repo.ui, hash): |
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236 link(usercachepath(repo.ui, hash), storepath(repo, hash)) |
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237 elif not getattr(repo, "_isconverting", False): |
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238 dst = util.atomictempfile(storepath(repo, hash), |
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239 createmode=repo.store.createmode) |
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240 for chunk in util.filechunkiter(open(file, 'rb')): |
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241 dst.write(chunk) |
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242 dst.close() |
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243 linktousercache(repo, hash) |
15168 | 244 |
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245 def linktousercache(repo, hash): |
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246 path = usercachepath(repo.ui, hash) |
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247 if path: |
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248 util.makedirs(os.path.dirname(path)) |
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249 link(storepath(repo, hash), path) |
15168 | 250 |
251 def getstandinmatcher(repo, pats=[], opts={}): | |
252 '''Return a match object that applies pats to the standin directory''' | |
253 standindir = repo.pathto(shortname) | |
254 if pats: | |
255 # patterns supplied: search standin directory relative to current dir | |
256 cwd = repo.getcwd() | |
257 if os.path.isabs(cwd): | |
258 # cwd is an absolute path for hg -R <reponame> | |
259 # work relative to the repository root in this case | |
260 cwd = '' | |
261 pats = [os.path.join(standindir, cwd, pat) for pat in pats] | |
262 elif os.path.isdir(standindir): | |
263 # no patterns: relative to repo root | |
264 pats = [standindir] | |
265 else: | |
266 # no patterns and no standin dir: return matcher that matches nothing | |
267 match = match_.match(repo.root, None, [], exact=True) | |
268 match.matchfn = lambda f: False | |
269 return match | |
270 return getmatcher(repo, pats, opts, showbad=False) | |
271 | |
272 def getmatcher(repo, pats=[], opts={}, showbad=True): | |
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273 '''Wrapper around scmutil.match() that adds showbad: if false, |
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274 neuter the match object's bad() method so it does not print any |
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275 warnings about missing files or directories.''' |
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276 match = scmutil.match(repo[None], pats, opts) |
15168 | 277 |
278 if not showbad: | |
279 match.bad = lambda f, msg: None | |
280 return match | |
281 | |
282 def composestandinmatcher(repo, rmatcher): | |
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283 '''Return a matcher that accepts standins corresponding to the |
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284 files accepted by rmatcher. Pass the list of files in the matcher |
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285 as the paths specified by the user.''' |
15168 | 286 smatcher = getstandinmatcher(repo, rmatcher.files()) |
287 isstandin = smatcher.matchfn | |
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288 def composedmatchfn(f): |
15168 | 289 return isstandin(f) and rmatcher.matchfn(splitstandin(f)) |
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290 smatcher.matchfn = composedmatchfn |
15168 | 291 |
292 return smatcher | |
293 | |
294 def standin(filename): | |
295 '''Return the repo-relative path to the standin for the specified big | |
296 file.''' | |
297 # Notes: | |
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298 # 1) Some callers want an absolute path, but for instance addlargefiles |
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299 # needs it repo-relative so it can be passed to repoadd(). So leave |
15168 | 300 # it up to the caller to use repo.wjoin() to get an absolute path. |
301 # 2) Join with '/' because that's what dirstate always uses, even on | |
302 # Windows. Change existing separator to '/' first in case we are | |
303 # passed filenames from an external source (like the command line). | |
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304 return shortname + '/' + util.pconvert(filename) |
15168 | 305 |
306 def isstandin(filename): | |
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307 '''Return true if filename is a big file standin. filename must be |
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308 in Mercurial's internal form (slash-separated).''' |
15168 | 309 return filename.startswith(shortname + '/') |
310 | |
311 def splitstandin(filename): | |
312 # Split on / because that's what dirstate always uses, even on Windows. | |
313 # Change local separator to / first just in case we are passed filenames | |
314 # from an external source (like the command line). | |
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315 bits = util.pconvert(filename).split('/', 1) |
15168 | 316 if len(bits) == 2 and bits[0] == shortname: |
317 return bits[1] | |
318 else: | |
319 return None | |
320 | |
321 def updatestandin(repo, standin): | |
322 file = repo.wjoin(splitstandin(standin)) | |
323 if os.path.exists(file): | |
324 hash = hashfile(file) | |
325 executable = getexecutable(file) | |
326 writestandin(repo, standin, hash, executable) | |
327 | |
328 def readstandin(repo, filename, node=None): | |
329 '''read hex hash from standin for filename at given node, or working | |
330 directory if no node is given''' | |
331 return repo[node][standin(filename)].data().strip() | |
332 | |
333 def writestandin(repo, standin, hash, executable): | |
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334 '''write hash to <repo.root>/<standin>''' |
15168 | 335 writehash(hash, repo.wjoin(standin), executable) |
336 | |
337 def copyandhash(instream, outfile): | |
338 '''Read bytes from instream (iterable) and write them to outfile, | |
339 computing the SHA-1 hash of the data along the way. Close outfile | |
340 when done and return the binary hash.''' | |
341 hasher = util.sha1('') | |
342 for data in instream: | |
343 hasher.update(data) | |
344 outfile.write(data) | |
345 | |
346 # Blecch: closing a file that somebody else opened is rude and | |
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347 # wrong. But it's so darn convenient and practical! After all, |
15168 | 348 # outfile was opened just to copy and hash. |
349 outfile.close() | |
350 | |
351 return hasher.digest() | |
352 | |
353 def hashrepofile(repo, file): | |
354 return hashfile(repo.wjoin(file)) | |
355 | |
356 def hashfile(file): | |
357 if not os.path.exists(file): | |
358 return '' | |
359 hasher = util.sha1('') | |
360 fd = open(file, 'rb') | |
361 for data in blockstream(fd): | |
362 hasher.update(data) | |
363 fd.close() | |
364 return hasher.hexdigest() | |
365 | |
366 class limitreader(object): | |
367 def __init__(self, f, limit): | |
368 self.f = f | |
369 self.limit = limit | |
370 | |
371 def read(self, length): | |
372 if self.limit == 0: | |
373 return '' | |
374 length = length > self.limit and self.limit or length | |
375 self.limit -= length | |
376 return self.f.read(length) | |
377 | |
378 def close(self): | |
379 pass | |
380 | |
381 def blockstream(infile, blocksize=128 * 1024): | |
382 """Generator that yields blocks of data from infile and closes infile.""" | |
383 while True: | |
384 data = infile.read(blocksize) | |
385 if not data: | |
386 break | |
387 yield data | |
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388 # same blecch as copyandhash() above |
15168 | 389 infile.close() |
390 | |
391 def writehash(hash, filename, executable): | |
392 util.makedirs(os.path.dirname(filename)) | |
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393 util.writefile(filename, hash + '\n') |
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394 os.chmod(filename, getmode(executable)) |
15168 | 395 |
396 def getexecutable(filename): | |
397 mode = os.stat(filename).st_mode | |
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398 return ((mode & stat.S_IXUSR) and |
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399 (mode & stat.S_IXGRP) and |
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400 (mode & stat.S_IXOTH)) |
15168 | 401 |
402 def getmode(executable): | |
403 if executable: | |
404 return 0755 | |
405 else: | |
406 return 0644 | |
407 | |
408 def urljoin(first, second, *arg): | |
409 def join(left, right): | |
410 if not left.endswith('/'): | |
411 left += '/' | |
412 if right.startswith('/'): | |
413 right = right[1:] | |
414 return left + right | |
415 | |
416 url = join(first, second) | |
417 for a in arg: | |
418 url = join(url, a) | |
419 return url | |
420 | |
421 def hexsha1(data): | |
422 """hexsha1 returns the hex-encoded sha1 sum of the data in the file-like | |
423 object data""" | |
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424 h = util.sha1() |
15168 | 425 for chunk in util.filechunkiter(data): |
426 h.update(chunk) | |
427 return h.hexdigest() | |
428 | |
429 def httpsendfile(ui, filename): | |
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430 return httpconnection.httpsendfile(ui, filename, 'rb') |
15168 | 431 |
432 def unixpath(path): | |
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433 '''Return a version of path normalized for use with the lfdirstate.''' |
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434 return util.pconvert(os.path.normpath(path)) |
15168 | 435 |
436 def islfilesrepo(repo): | |
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437 if ('largefiles' in repo.requirements and |
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438 util.any(shortname + '/' in f[0] for f in repo.store.datafiles())): |
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439 return True |
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440 |
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441 return util.any(openlfdirstate(repo.ui, repo, False)) |
15168 | 442 |
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443 class storeprotonotcapable(Exception): |
15168 | 444 def __init__(self, storetypes): |
445 self.storetypes = storetypes | |
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446 |
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447 def getcurrentheads(repo): |
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448 branches = repo.branchmap() |
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449 heads = [] |
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450 for branch in branches: |
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451 newheads = repo.branchheads(branch) |
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452 heads = heads + newheads |
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453 return heads |
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454 |
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455 def getstandinsstate(repo): |
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456 standins = [] |
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457 matcher = getstandinmatcher(repo) |
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458 for standin in dirstatewalk(repo.dirstate, matcher): |
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459 lfile = splitstandin(standin) |
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460 standins.append((lfile, readstandin(repo, lfile))) |
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461 return standins |
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462 |
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463 def getlfilestoupdate(oldstandins, newstandins): |
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464 changedstandins = set(oldstandins).symmetric_difference(set(newstandins)) |
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465 filelist = [] |
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466 for f in changedstandins: |
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467 if f[0] not in filelist: |
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468 filelist.append(f[0]) |
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469 return filelist |