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patches/cache-remote-revisions.diff
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***************
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*** 738,777 ****
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          revisions = []
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          pb = ProgressBar(show_spinner=True)
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          total = len(revision_ids)
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-         for i,f in enumerate(revision_ids):
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-             revisions.append(other.get_revision(f))
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-             pb.update('retrieving revisions', i+1, total)
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-         pb.clear()
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-         
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-         needed_texts = sets.Set()
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- 
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-         for index, rev in enumerate(revisions):
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-             pb.update('Scanning revisions for file contents', index, total)
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-             inv = other.get_inventory(str(rev.inventory_id))
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-             for key, entry in inv.iter_entries():
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-                 if entry.text_id is None:
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-                     continue
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-                 if entry.text_id not in self.text_store:
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-                     needed_texts.add(entry.text_id)
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-         pb.clear()
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-         count = self.text_store.copy_multi(other.text_store, needed_texts, pb,
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-                                            "Copying file contents")
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-         pb.clear()
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-         print "Added %d file contents." % count 
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-         inventory_ids = [ f.inventory_id for f in revisions ]
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-         count = self.inventory_store.copy_multi(other.inventory_store, 
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-                                                 inventory_ids, pb,
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-                                                 "Copying inventories")
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-         pb.clear()
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-         print "Added %d inventories." % count 
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-         revision_ids = [ f.revision_id for f in revisions]
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-         count = self.revision_store.copy_multi(other.revision_store, 
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-                                                revision_ids, pb, 
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-                                                "Copying revisions")
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-         pb.clear()
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-         for revision_id in revision_ids:
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-             self.append_revision(revision_id)
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-         print "Added %d revisions." % count
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      def commit(self, *args, **kw):
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--- 738,799 ----
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          revisions = []
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          pb = ProgressBar(show_spinner=True)
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          total = len(revision_ids)
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+         tmp_dir = tempfile.mkdtemp(prefix = "temp-stores-")
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+         try:
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+             tmp_rev_dir = os.path.join(tmp_dir, "revisions")
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+             os.mkdir(tmp_rev_dir)
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+             tmp_revs = ImmutableStore(tmp_rev_dir)
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+             count = tmp_revs.copy_multi(other.revision_store, revision_ids, pb, 
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+                                         "Caching revisions")
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+             #EVIL! Substituting a local partial store for a complete one
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+             #This is a significant performance boost when complete one is
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+             #a remote store. 
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+             other.revision_store = tmp_revs
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+             pb.clear()
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+ 
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+             for i,f in enumerate(revision_ids):
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+                 revisions.append(other.get_revision(f))
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+                 pb.update("Parsing revisions", i, len(revision_ids))
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+             
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+             needed_texts = sets.Set()
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+ 
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+             #Again with the EVIL.
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+             tmp_rev_dir = os.path.join(tmp_dir, "inventories")
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+             os.mkdir(tmp_rev_dir)
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+             inv_ids = [r.inventory_id for r in revisions]
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+             tmp_revs = ImmutableStore(tmp_rev_dir)
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+             count = tmp_revs.copy_multi(other.inventory_store, inv_ids, pb, 
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+                                         "Caching inventories")
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+             other.inventory_store = tmp_revs
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+             pb.clear()
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+             for index, rev in enumerate(revisions):
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+                 pb.update('Scanning revisions for file contents', index, total)
77
 
+                 inv = other.get_inventory(str(rev.inventory_id))
78
 
+                 for key, entry in inv.iter_entries():
79
 
+                     if entry.text_id is None:
80
 
+                         continue
81
 
+                     if entry.text_id not in self.text_store:
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+                         needed_texts.add(entry.text_id)
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+             pb.clear()
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+             count = self.text_store.copy_multi(other.text_store, needed_texts, pb,
85
 
+                                                "Copying file contents")
86
 
+             pb.clear()
87
 
+             print "Added %d file contents." % count 
88
 
+             inventory_ids = [ f.inventory_id for f in revisions ]
89
 
+             count = self.inventory_store.copy_multi(other.inventory_store, 
90
 
+                                                     inventory_ids, pb,
91
 
+                                                     "Copying inventories")
92
 
+             pb.clear()
93
 
+             print "Added %d inventories." % count 
94
 
+             revision_ids = [ f.revision_id for f in revisions]
95
 
+             count = self.revision_store.copy_multi(other.revision_store, 
96
 
+                                                    revision_ids)
97
 
+             pb.clear()
98
 
+             for revision_id in revision_ids:
99
 
+                 self.append_revision(revision_id)
100
 
+             print "Added %d revisions." % count
101
 
+         finally:
102
 
+             shutil.rmtree(tmp_dir)
103
 
                      
104
 
          
105
 
      def commit(self, *args, **kw):