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diff --git a/t/t7700-repack.sh b/t/t7700-repack.sh
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+#!/bin/sh
+
+test_description='git repack works correctly'
+
+. ./test-lib.sh
+
+test_expect_failure 'objects in packs marked .keep are not repacked' '
+ echo content1 > file1 &&
+ echo content2 > file2 &&
+ git add . &&
+ git commit -m initial_commit &&
+ # Create two packs
+ # The first pack will contain all of the objects except one
+ git rev-list --objects --all | grep -v file2 |
+ git pack-objects pack > /dev/null &&
+ # The second pack will contain the excluded object
+ packsha1=$(git rev-list --objects --all | grep file2 |
+ git pack-objects pack) &&
+ touch -r pack-$packsha1.pack pack-$packsha1.keep &&
+ objsha1=$(git verify-pack -v pack-$packsha1.idx | head -n 1 |
+ sed -e "s/^\([0-9a-f]\{40\}\).*/\1/") &&
+ mv pack-* .git/objects/pack/ &&
+ git repack -A -d -l &&
+ git prune-packed &&
+ for p in .git/objects/pack/*.idx; do
+ idx=$(basename $p)
+ test "pack-$packsha1.idx" = "$idx" && continue
+ if git verify-pack -v $p | egrep "^$objsha1"; then
+ found_duplicate_object=1
+ echo "DUPLICATE OBJECT FOUND"
+ break
+ fi
+ done &&
+ test -z "$found_duplicate_object"
+'
+
+test_done
+