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-rw-r--r--Documentation/git-filter-branch.txt13
1 files changed, 12 insertions, 1 deletions
diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt
index 2b40bab..394a77a 100644
--- a/Documentation/git-filter-branch.txt
+++ b/Documentation/git-filter-branch.txt
@@ -159,7 +159,18 @@ to other tags will be rewritten to point to the underlying commit.
--subdirectory-filter <directory>::
Only look at the history which touches the given subdirectory.
The result will contain that directory (and only that) as its
- project root.
+ project root. Implies --remap-to-ancestor.
+
+--remap-to-ancestor::
+ Rewrite refs to the nearest rewritten ancestor instead of
+ ignoring them.
++
+Normally, positive refs on the command line are only changed if the
+commit they point to was rewritten. However, you can limit the extent
+of this rewriting by using linkgit:rev-list[1] arguments, e.g., path
+limiters. Refs pointing to such excluded commits would then normally
+be ignored. With this option, they are instead rewritten to point at
+the nearest ancestor that was not excluded.
--prune-empty::
Some kind of filters will generate empty commits, that left the tree