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annotate mercurial/statichttprepo.py @ 5909:f45f7390c1c5

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strip: calculate list of extra nodes to save and pass it to changegroupsubset When we remove revision N from the repository, all revisions >= N are affected: either it's a descendant from N and will also be removed, or it's not a descendant of N and will be renumbered. As a consequence, we have to (at least temporarily) remove all filelog and manifest revisions that have a linkrev >= N, readding some of them later. Unfortunately, it's possible to have a revlog with two revisions r1 and r2 such that r1 < r2, but linkrev(r1) > linkrev(r2). If we try to strip revision linkrev(r1) from the repository, we'll also lose revision r2 when we truncate this revlog. We already use changegroupsubset to create a temporary changegroup containing the revisions that have to be restored, but that function is unable to detect that we also wanted to save the r2 in the case above. So we manually calculate these extra nodes and pass it to changegroupsubset. This should fix issue764.
author Alexis S. L. Carvalho <alexis@cecm.usp.br>
date Sat, 19 Jan 2008 18:01:16 -0200
parents 639935f2e63a
children 6605a03cbf87
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1 # statichttprepo.py - simple http repository class for mercurial
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2 #
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3 # This provides read-only repo access to repositories exported via static http
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4 #
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5 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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6 #
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7 # This software may be used and distributed according to the terms
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8 # of the GNU General Public License, incorporated herein by reference.
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9
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10 from i18n import _
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11 import changelog, filelog, httprangereader
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12 import repo, localrepo, manifest, os, urllib, urllib2, util
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13
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14 class rangereader(httprangereader.httprangereader):
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15 def read(self, size=None):
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16 try:
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17 return httprangereader.httprangereader.read(self, size)
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18 except urllib2.HTTPError, inst:
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19 raise IOError(None, inst)
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20 except urllib2.URLError, inst:
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21 raise IOError(None, inst.reason[1])
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22
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23 def opener(base):
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24 """return a function that opens files over http"""
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25 p = base
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26 def o(path, mode="r"):
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27 f = "/".join((p, urllib.quote(path)))
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28 return rangereader(f)
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29 return o
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30
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31 class statichttprepository(localrepo.localrepository):
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32 def __init__(self, ui, path):
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33 self._url = path
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34 self.ui = ui
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35
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36 self.path = path.rstrip('/') + "/.hg"
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37 self.opener = opener(self.path)
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38 # find requirements
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39 try:
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40 requirements = self.opener("requires").read().splitlines()
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41 except IOError:
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42 requirements = []
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43 # check them
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44 for r in requirements:
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45 if r not in self.supported:
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46 raise repo.RepoError(_("requirement '%s' not supported") % r)
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47
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48 # setup store
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49 if "store" in requirements:
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50 self.encodefn = util.encodefilename
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51 self.decodefn = util.decodefilename
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52 self.spath = self.path + "/store"
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53 else:
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54 self.encodefn = lambda x: x
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55 self.decodefn = lambda x: x
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56 self.spath = self.path
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57 self.sopener = util.encodedopener(opener(self.spath), self.encodefn)
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58
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59 self.manifest = manifest.manifest(self.sopener)
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60 self.changelog = changelog.changelog(self.sopener)
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61 self.tagscache = None
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62 self.nodetagscache = None
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63 self.encodepats = None
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64 self.decodepats = None
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65
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66 def url(self):
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67 return 'static-' + self._url
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68
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69 def dev(self):
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70 return -1
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71
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72 def local(self):
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73 return False
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75 def instance(ui, path, create):
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76 if create:
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77 raise util.Abort(_('cannot create new static-http repository'))
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78 return statichttprepository(ui, path[7:])