#!/bin/sh

test_description='git repack works correctly'

. ./test-lib.sh

commit_and_pack() {
	test_commit "$@" >/dev/null &&
	SHA1=$(git pack-objects --all --unpacked --incremental .git/objects/pack/pack </dev/null) &&
	echo pack-${SHA1}.pack
}

test_expect_success 'objects in packs marked .keep are not repacked' '
	echo content1 > file1 &&
	echo content2 > file2 &&
	git add . &&
	test_tick &&
	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=$(git rev-list --objects --all | grep file2 |
		git pack-objects pack) &&
	>pack-$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_expect_success 'writing bitmaps via command-line can duplicate .keep objects' '
	# build on $objsha1, $packsha1, and .keep state from previous
	git repack -Adbl &&
	test_when_finished "found_duplicate_object=" &&
	for p in .git/objects/pack/*.idx; do
		idx=$(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 "$found_duplicate_object" = 1
'

test_expect_success 'writing bitmaps via config can duplicate .keep objects' '
	# build on $objsha1, $packsha1, and .keep state from previous
	git -c repack.writebitmaps=true repack -Adl &&
	test_when_finished "found_duplicate_object=" &&
	for p in .git/objects/pack/*.idx; do
		idx=$(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 "$found_duplicate_object" = 1
'

test_expect_success 'loose objects in alternate ODB are not repacked' '
	mkdir alt_objects &&
	echo $(pwd)/alt_objects > .git/objects/info/alternates &&
	echo content3 > file3 &&
	objsha1=$(GIT_OBJECT_DIRECTORY=alt_objects git hash-object -w file3) &&
	git add file3 &&
	test_tick &&
	git commit -m commit_file3 &&
	git repack -a -d -l &&
	git prune-packed &&
	for p in .git/objects/pack/*.idx; do
		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_expect_success 'packed obs in alt ODB are repacked even when local repo is packless' '
	mkdir alt_objects/pack &&
	mv .git/objects/pack/* alt_objects/pack &&
	git repack -a &&
	myidx=$(ls -1 .git/objects/pack/*.idx) &&
	test -f "$myidx" &&
	for p in alt_objects/pack/*.idx; do
		git verify-pack -v $p | sed -n -e "/^[0-9a-f]\{40\}/p"
	done | while read sha1 rest; do
		if ! ( git verify-pack -v $myidx | grep "^$sha1" ); then
			echo "Missing object in local pack: $sha1"
			return 1
		fi
	done
'

test_expect_success 'packed obs in alt ODB are repacked when local repo has packs' '
	rm -f .git/objects/pack/* &&
	echo new_content >> file1 &&
	git add file1 &&
	test_tick &&
	git commit -m more_content &&
	git repack &&
	git repack -a -d &&
	myidx=$(ls -1 .git/objects/pack/*.idx) &&
	test -f "$myidx" &&
	for p in alt_objects/pack/*.idx; do
		git verify-pack -v $p | sed -n -e "/^[0-9a-f]\{40\}/p"
	done | while read sha1 rest; do
		if ! ( git verify-pack -v $myidx | grep "^$sha1" ); then
			echo "Missing object in local pack: $sha1"
			return 1
		fi
	done
'

test_expect_success 'packed obs in alternate ODB kept pack are repacked' '
	# swap the .keep so the commit object is in the pack with .keep
	for p in alt_objects/pack/*.pack
	do
		base_name=$(basename $p .pack) &&
		if test -f alt_objects/pack/$base_name.keep
		then
			rm alt_objects/pack/$base_name.keep
		else
			touch alt_objects/pack/$base_name.keep
		fi
	done &&
	git repack -a -d &&
	myidx=$(ls -1 .git/objects/pack/*.idx) &&
	test -f "$myidx" &&
	for p in alt_objects/pack/*.idx; do
		git verify-pack -v $p | sed -n -e "/^[0-9a-f]\{40\}/p"
	done | while read sha1 rest; do
		if ! ( git verify-pack -v $myidx | grep "^$sha1" ); then
			echo "Missing object in local pack: $sha1"
			return 1
		fi
	done
'

test_expect_success 'packed unreachable obs in alternate ODB are not loosened' '
	rm -f alt_objects/pack/*.keep &&
	mv .git/objects/pack/* alt_objects/pack/ &&
	csha1=$(git rev-parse HEAD^{commit}) &&
	git reset --hard HEAD^ &&
	test_tick &&
	git reflog expire --expire=$test_tick --expire-unreachable=$test_tick --all &&
	# The pack-objects call on the next line is equivalent to
	# git repack -A -d without the call to prune-packed
	git pack-objects --honor-pack-keep --non-empty --all --reflog \
	    --unpack-unreachable </dev/null pack &&
	rm -f .git/objects/pack/* &&
	mv pack-* .git/objects/pack/ &&
	test 0 = $(git verify-pack -v -- .git/objects/pack/*.idx |
		egrep "^$csha1 " | sort | uniq | wc -l) &&
	echo > .git/objects/info/alternates &&
	test_must_fail git show $csha1
'

test_expect_success 'local packed unreachable obs that exist in alternate ODB are not loosened' '
	echo $(pwd)/alt_objects > .git/objects/info/alternates &&
	echo "$csha1" | git pack-objects --non-empty --all --reflog pack &&
	rm -f .git/objects/pack/* &&
	mv pack-* .git/objects/pack/ &&
	# The pack-objects call on the next line is equivalent to
	# git repack -A -d without the call to prune-packed
	git pack-objects --honor-pack-keep --non-empty --all --reflog \
	    --unpack-unreachable </dev/null pack &&
	rm -f .git/objects/pack/* &&
	mv pack-* .git/objects/pack/ &&
	test 0 = $(git verify-pack -v -- .git/objects/pack/*.idx |
		egrep "^$csha1 " | sort | uniq | wc -l) &&
	echo > .git/objects/info/alternates &&
	test_must_fail git show $csha1
'

test_expect_success 'objects made unreachable by grafts only are kept' '
	test_tick &&
	git commit --allow-empty -m "commit 4" &&
	H0=$(git rev-parse HEAD) &&
	H1=$(git rev-parse HEAD^) &&
	H2=$(git rev-parse HEAD^^) &&
	echo "$H0 $H2" > .git/info/grafts &&
	git reflog expire --expire=$test_tick --expire-unreachable=$test_tick --all &&
	git repack -a -d &&
	git cat-file -t $H1
'

test_expect_success 'repack --keep-pack' '
	test_create_repo keep-pack &&
	(
		cd keep-pack &&
		P1=$(commit_and_pack 1) &&
		P2=$(commit_and_pack 2) &&
		P3=$(commit_and_pack 3) &&
		P4=$(commit_and_pack 4) &&
		ls .git/objects/pack/*.pack >old-counts &&
		test_line_count = 4 old-counts &&
		git repack -a -d --keep-pack $P1 --keep-pack $P4 &&
		ls .git/objects/pack/*.pack >new-counts &&
		grep -q $P1 new-counts &&
		grep -q $P4 new-counts &&
		test_line_count = 3 new-counts &&
		git fsck
	)
'

test_done

