merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 265 insertions, 0 deletions

diff --git a/third_party/git/t/t7700-repack.sh b/third_party/git/t/t7700-repack.sh
new file mode 100755
index 000000000000..4e855bc21b45
--- /dev/null
+++ b/third_party/git/t/t7700-repack.sh
@@ -0,0 +1,265 @@
+#!/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 $P4 new-counts &&
+		test_line_count = 3 new-counts &&
+		git fsck
+	)
+'
+
+test_expect_success 'bitmaps are created by default in bare repos' '
+	git clone --bare .git bare.git &&
+	git -C bare.git repack -ad &&
+	bitmap=$(ls bare.git/objects/pack/*.bitmap) &&
+	test_path_is_file "$bitmap"
+'
+
+test_expect_success 'incremental repack does not complain' '
+	git -C bare.git repack -q 2>repack.err &&
+	test_must_be_empty repack.err
+'
+
+test_expect_success 'bitmaps can be disabled on bare repos' '
+	git -c repack.writeBitmaps=false -C bare.git repack -ad &&
+	bitmap=$(ls bare.git/objects/pack/*.bitmap 2>/dev/null || :) &&
+	test -z "$bitmap"
+'
+
+test_expect_success 'no bitmaps created if .keep files present' '
+	pack=$(ls bare.git/objects/pack/*.pack) &&
+	test_path_is_file "$pack" &&
+	keep=${pack%.pack}.keep &&
+	test_when_finished "rm -f \"\$keep\"" &&
+	>"$keep" &&
+	git -C bare.git repack -ad 2>stderr &&
+	test_must_be_empty stderr &&
+	find bare.git/objects/pack/ -type f -name "*.bitmap" >actual &&
+	test_must_be_empty actual
+'
+
+test_expect_success 'auto-bitmaps do not complain if unavailable' '
+	test_config -C bare.git pack.packSizeLimit 1M &&
+	blob=$(test-tool genrandom big $((1024*1024)) |
+	       git -C bare.git hash-object -w --stdin) &&
+	git -C bare.git update-ref refs/tags/big $blob &&
+	git -C bare.git repack -ad 2>stderr &&
+	test_must_be_empty stderr &&
+	find bare.git/objects/pack -type f -name "*.bitmap" >actual &&
+	test_must_be_empty actual
+'
+
+test_done