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narrowrevlog: add what little I can remember about rename filtering
authorAugie Fackler <augie@google.com>
Mon, 12 Feb 2018 14:12:28 -0500
changeset 36096 48b592d986e7
parent 36095 59adb3051718
child 36097 66b4ffe90676
narrowrevlog: add what little I can remember about rename filtering Differential Revision: https://phab.mercurial-scm.org/D2188
hgext/narrow/narrowrevlog.py file | annotate | diff | comparison | revisions 
--- a/hgext/narrow/narrowrevlog.py	Mon Feb 12 14:01:44 2018 -0500
+++ b/hgext/narrow/narrowrevlog.py	Mon Feb 12 14:12:28 2018 -0500
@@ -139,6 +139,12 @@
 def makenarrowfilelog(fl, narrowmatch):
     class narrowfilelog(fl.__class__):
         def renamed(self, node):
+            # Renames that come from outside the narrowspec are
+            # problematic at least for git-diffs, because we lack the
+            # base text for the rename. This logic was introduced in
+            # 3cd72b1 of narrowhg (authored by martinvonz, reviewed by
+            # adgar), but that revision doesn't have any additional
+            # commentary on what problems we can encounter.
             m = super(narrowfilelog, self).renamed(node)
             if m and not narrowmatch(m[0]):
                 return None
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