[PATCH 12/18] dim: add revert-rerere

[Daniel Vetter]

Encodes the best practices for undoing a botched-up conflict
resolution.

Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 dim     |  7 +++++++
 dim.rst | 12 +++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/dim b/dim
index d01407a7b10c..91aa99f230e7 100755
--- a/dim
+++ b/dim
@@ -298,6 +298,13 @@ function update_rerere_cache
 	cd -
 }
 
+function dim_revert_rerere
+{
+	cd $DIM_PREFIX/drm-rerere/
+	git revert $1
+	rm `rr_cache_dir`/* -Rf
+}
+
 function dim_rebuild_nightly
 {
 	local integration_branch=drm-tip
diff --git a/dim.rst b/dim.rst
index dd4ba0fc5720..ca9670ebc1b5 100644
--- a/dim.rst
+++ b/dim.rst
@@ -9,7 +9,7 @@ drm-intel maintainer script
 :Author: Daniel Vetter <daniel.vetter at ffwll.ch>
 :Author: Jani Nikula <jani.nikula at intel.com>
 :Date: 2014-05-15
-:Copyright: 2012-2015 Intel Corporation
+:Copyright: 2012-2016 Intel Corporation
 :Manual section: 1
 :Manual group: maintainer tools
 
@@ -90,6 +90,16 @@ rebuild-nightly
 Rebuilds the nightly branch. Useful when ad-hoc trees are
 included in -nightly.
 
+revert-rerere *rerere-chache-commit-ish*
+----------------------------------------
+
+When a stored conflict resolution in the integration tree this command can be
+used to fix up the mess. First figure out which commit in the *rerere-cache*
+branch contains the bogus conflict resolution, then revert it using this
+command. This ensures the resolution is also purged from any local caches, to
+make sure it doesn't get resurrected. Then run *rebuild-nightly* to redo the
+merges, correctly.
+
 cat-to-fixup
 ------------
 
-- 
2.9.3