[PATCH] dim: Consider fix-of-fix for -fixes cherry picking.

[Rodrigo Vivi]

In case a fix was not propagated yet to upstream, the
original commit sha won't be found hence the fix of this
fix will be missed during the cherry-pick.

Since dim cherry-picks reliably adds the -x "(cherry picked
from" message, let's also grep in the log to see if that
was the case, before we give up and forget.

Also, if that's the case, let's then add the extra 'Fixes:'
tag for a better record.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 dim | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/dim b/dim
index 4b43bf8..e26b22f 100755
--- a/dim
+++ b/dim
@@ -1485,8 +1485,13 @@ function cherry_pick_branch
 
 		# Note: Cc: stable will overrule Fixes:
 		if [[ -n "$have_fixes" && -z "$needed" ]]; then
-			echo "Fixes a commit not in $branch. OK."
-			continue
+
+			fixes=$(git log -1 --format=format:%h $fixes 2>/dev/null || true)
+			fix_of_fix=$(git log --grep="cherry picked from commit $fixes" --after=6months --format=format:%h drm-intel-next-fixes -1)
+			if [[ -z "$fix_of_fix" ]]; then
+				echo "Fixes a commit not in $branch. OK."
+				continue
+			fi
 		fi
 
 		echo "Try to cherry-pick."
@@ -1495,6 +1500,10 @@ function cherry_pick_branch
 			echo "FAILED: $(dim_cite $commit)"
 			(dim_cite $commit) >> $fail_log
 			git cherry-pick --abort
+		else
+			if [[ "$fix_of_fix" ]]; then
+				dim_commit_add_tag "Fixes: $(dim_cite $fix_of_fix)"
+			fi
 		fi
 	done
 
-- 
2.37.1