Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3536 insertions, 0 deletions

diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
new file mode 100755
index 0000000..aa55b41
--- /dev/null
+++ b/t/t9300-fast-import.sh
@@ -0,0 +1,3536 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Shawn Pearce
+#
+
+test_description='test git fast-import utility'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-diff.sh ;# test-lib chdir's into trash
+
+verify_packs () {
+	for p in .git/objects/pack/*.pack
+	do
+		git verify-pack "$@" "$p" || return
+	done
+}
+
+file2_data='file2
+second line of EOF'
+
+file3_data='EOF
+in 3rd file
+ END'
+
+file4_data=abcd
+file4_len=4
+
+file5_data='an inline file.
+  we should see it later.'
+
+file6_data='#!/bin/sh
+echo "$@"'
+
+###
+### series A
+###
+
+test_expect_success 'empty stream succeeds' '
+	git config fastimport.unpackLimit 0 &&
+	git fast-import </dev/null
+'
+
+test_expect_success 'truncated stream complains' '
+	echo "tag foo" | test_must_fail git fast-import
+'
+
+test_expect_success 'A: create pack from stdin' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	blob
+	mark :2
+	data <<EOF
+	$file2_data
+	EOF
+
+	blob
+	mark :3
+	data <<END
+	$file3_data
+	END
+
+	blob
+	mark :4
+	data $file4_len
+	$file4_data
+	commit refs/heads/main
+	mark :5
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	initial
+	COMMIT
+
+	M 644 :2 file2
+	M 644 :3 file3
+	M 755 :4 file4
+
+	tag series-A
+	from :5
+	data <<EOF
+	An annotated tag without a tagger
+	EOF
+
+	tag series-A-blob
+	from :3
+	data <<EOF
+	An annotated tag that annotates a blob.
+	EOF
+
+	tag to-be-deleted
+	from :3
+	data <<EOF
+	Another annotated tag that annotates a blob.
+	EOF
+
+	reset refs/tags/to-be-deleted
+	from $ZERO_OID
+
+	tag nested
+	mark :6
+	from :4
+	data <<EOF
+	Tag of our lovely commit
+	EOF
+
+	reset refs/tags/nested
+	from $ZERO_OID
+
+	tag nested
+	mark :7
+	from :6
+	data <<EOF
+	Tag of tag of our lovely commit
+	EOF
+
+	alias
+	mark :8
+	to :5
+
+	INPUT_END
+	git fast-import --export-marks=marks.out <input &&
+	git whatchanged main
+'
+
+test_expect_success 'A: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'A: verify commit' '
+	cat >expect <<-EOF &&
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	initial
+	EOF
+	git cat-file commit main | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify tree' '
+	cat >expect <<-EOF &&
+	100644 blob file2
+	100644 blob file3
+	100755 blob file4
+	EOF
+	git cat-file -p main^{tree} | sed "s/ [0-9a-f]*	/ /" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify file2' '
+	echo "$file2_data" >expect &&
+	git cat-file blob main:file2 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify file3' '
+	echo "$file3_data" >expect &&
+	git cat-file blob main:file3 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify file4' '
+	printf "$file4_data" >expect &&
+	git cat-file blob main:file4 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify tag/series-A' '
+	cat >expect <<-EOF &&
+	object $(git rev-parse refs/heads/main)
+	type commit
+	tag series-A
+
+	An annotated tag without a tagger
+	EOF
+	git cat-file tag tags/series-A >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify tag/series-A-blob' '
+	cat >expect <<-EOF &&
+	object $(git rev-parse refs/heads/main:file3)
+	type blob
+	tag series-A-blob
+
+	An annotated tag that annotates a blob.
+	EOF
+	git cat-file tag tags/series-A-blob >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify tag deletion is successful' '
+	test_must_fail git rev-parse --verify refs/tags/to-be-deleted
+'
+
+test_expect_success 'A: verify marks output' '
+	cat >expect <<-EOF &&
+	:2 $(git rev-parse --verify main:file2)
+	:3 $(git rev-parse --verify main:file3)
+	:4 $(git rev-parse --verify main:file4)
+	:5 $(git rev-parse --verify main^0)
+	:6 $(git cat-file tag nested | grep object | cut -d" " -f 2)
+	:7 $(git rev-parse --verify nested)
+	:8 $(git rev-parse --verify main^0)
+	EOF
+	test_cmp expect marks.out
+'
+
+test_expect_success 'A: verify marks import' '
+	git fast-import \
+		--import-marks=marks.out \
+		--export-marks=marks.new \
+		</dev/null &&
+	test_cmp expect marks.new
+'
+
+test_expect_success 'A: tag blob by sha1' '
+	test_tick &&
+	new_blob=$(echo testing | git hash-object --stdin) &&
+	cat >input <<-INPUT_END &&
+	tag series-A-blob-2
+	from $(git rev-parse refs/heads/main:file3)
+	data <<EOF
+	Tag blob by sha1.
+	EOF
+
+	blob
+	mark :6
+	data <<EOF
+	testing
+	EOF
+
+	commit refs/heads/new_blob
+	committer  <> 0 +0000
+	data 0
+	M 644 :6 new_blob
+	#pretend we got sha1 from fast-import
+	ls "new_blob"
+
+	tag series-A-blob-3
+	from $new_blob
+	data <<EOF
+	Tag new_blob.
+	EOF
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	object $(git rev-parse refs/heads/main:file3)
+	type blob
+	tag series-A-blob-2
+
+	Tag blob by sha1.
+	object $new_blob
+	type blob
+	tag series-A-blob-3
+
+	Tag new_blob.
+	EOF
+
+	git fast-import <input &&
+	git cat-file tag tags/series-A-blob-2 >actual &&
+	git cat-file tag tags/series-A-blob-3 >>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'A: verify marks import does not crash' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/verify--import-marks
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	recreate from :5
+	COMMIT
+
+	from :5
+	M 755 :2 copy-of-file2
+
+	INPUT_END
+
+	git fast-import --import-marks=marks.out <input &&
+	git whatchanged verify--import-marks
+'
+
+test_expect_success 'A: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'A: verify diff' '
+	copy=$(git rev-parse --verify main:file2) &&
+	cat >expect <<-EOF &&
+	:000000 100755 $ZERO_OID $copy A	copy-of-file2
+	EOF
+	git diff-tree -M -r main verify--import-marks >actual &&
+	compare_diff_raw expect actual &&
+	test $(git rev-parse --verify main:file2) \
+	    = $(git rev-parse --verify verify--import-marks:copy-of-file2)
+'
+
+test_expect_success 'A: export marks with large values' '
+	test_tick &&
+	mt=$(git hash-object --stdin < /dev/null) &&
+	>input.blob &&
+	>marks.exp &&
+	>tree.exp &&
+
+	cat >input.commit <<-EOF &&
+	commit refs/heads/verify--dump-marks
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	test the sparse array dumping routines with exponentially growing marks
+	COMMIT
+	EOF
+
+	i=0 l=4 m=6 n=7 &&
+	while test "$i" -lt 27
+	do
+		cat >>input.blob <<-EOF &&
+		blob
+		mark :$l
+		data 0
+		blob
+		mark :$m
+		data 0
+		blob
+		mark :$n
+		data 0
+		EOF
+		echo "M 100644 :$l l$i" >>input.commit &&
+		echo "M 100644 :$m m$i" >>input.commit &&
+		echo "M 100644 :$n n$i" >>input.commit &&
+
+		echo ":$l $mt" >>marks.exp &&
+		echo ":$m $mt" >>marks.exp &&
+		echo ":$n $mt" >>marks.exp &&
+
+		printf "100644 blob $mt\tl$i\n" >>tree.exp &&
+		printf "100644 blob $mt\tm$i\n" >>tree.exp &&
+		printf "100644 blob $mt\tn$i\n" >>tree.exp &&
+
+		l=$(($l + $l)) &&
+		m=$(($m + $m)) &&
+		n=$(($l + $n)) &&
+
+		i=$((1 + $i)) || return 1
+	done &&
+
+	sort tree.exp > tree.exp_s &&
+
+	cat input.blob input.commit | git fast-import --export-marks=marks.large &&
+	git ls-tree refs/heads/verify--dump-marks >tree.out &&
+	test_cmp tree.exp_s tree.out &&
+	test_cmp marks.exp marks.large
+'
+
+###
+### series B
+###
+
+test_expect_success 'B: fail on invalid blob sha1' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/branch
+	mark :1
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	corrupt
+	COMMIT
+
+	from refs/heads/main
+	M 755 $(echo $ZERO_OID | sed -e "s/0$/1/") zero1
+
+	INPUT_END
+
+	test_when_finished "rm -f .git/objects/pack_* .git/objects/index_*" &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'B: accept branch name "TEMP_TAG"' '
+	cat >input <<-INPUT_END &&
+	commit TEMP_TAG
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	tag base
+	COMMIT
+
+	from refs/heads/main
+
+	INPUT_END
+
+	test_when_finished "rm -f .git/TEMP_TAG
+		git gc
+		git prune" &&
+	git fast-import <input &&
+	test $(test-tool ref-store main resolve-ref TEMP_TAG 0 | cut -f1 -d " " ) != "$ZERO_OID" &&
+	test $(git rev-parse main) = $(git rev-parse TEMP_TAG^)
+'
+
+test_expect_success 'B: accept empty committer' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/empty-committer-1
+	committer  <> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/empty-committer-1
+		git gc
+		git prune" &&
+	git fast-import <input &&
+	out=$(git fsck) &&
+	echo "$out" &&
+	test -z "$out"
+'
+
+test_expect_success 'B: reject invalid timezone' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-timezone
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1234567890 +051800
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/invalid-timezone" &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'B: accept invalid timezone with raw-permissive' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-timezone
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1234567890 +051800
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	git init invalid-timezone &&
+	git -C invalid-timezone fast-import --date-format=raw-permissive <input &&
+	git -C invalid-timezone cat-file -p invalid-timezone >out &&
+	grep "1234567890 [+]051800" out
+'
+
+test_expect_success 'B: accept and fixup committer with no name' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/empty-committer-2
+	committer <a@b.com> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/empty-committer-2
+		git gc
+		git prune" &&
+	git fast-import <input &&
+	out=$(git fsck) &&
+	echo "$out" &&
+	test -z "$out"
+'
+
+test_expect_success 'B: fail on invalid committer (1)' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-committer
+	committer Name email> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/invalid-committer" &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'B: fail on invalid committer (2)' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-committer
+	committer Name <e<mail> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/invalid-committer" &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'B: fail on invalid committer (3)' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-committer
+	committer Name <email>> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/invalid-committer" &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'B: fail on invalid committer (4)' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-committer
+	committer Name <email $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/invalid-committer" &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'B: fail on invalid committer (5)' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/invalid-committer
+	committer Name<email> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	empty commit
+	COMMIT
+	INPUT_END
+
+	test_when_finished "git update-ref -d refs/heads/invalid-committer" &&
+	test_must_fail git fast-import <input
+'
+
+###
+### series C
+###
+
+test_expect_success 'C: incremental import create pack from stdin' '
+	newf=$(echo hi newf | git hash-object -w --stdin) &&
+	oldf=$(git rev-parse --verify main:file2) &&
+	thrf=$(git rev-parse --verify main:file3) &&
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/branch
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	second
+	COMMIT
+
+	from refs/heads/main
+	M 644 $oldf file2/oldf
+	M 755 $newf file2/newf
+	D file3
+
+	INPUT_END
+
+	git fast-import <input &&
+	git whatchanged branch
+'
+
+test_expect_success 'C: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'C: validate reuse existing blob' '
+	test $newf = $(git rev-parse --verify branch:file2/newf) &&
+	test $oldf = $(git rev-parse --verify branch:file2/oldf)
+'
+
+test_expect_success 'C: verify commit' '
+	cat >expect <<-EOF &&
+	parent $(git rev-parse --verify main^0)
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	second
+	EOF
+
+	git cat-file commit branch | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'C: validate rename result' '
+	zero=$ZERO_OID &&
+	cat >expect <<-EOF &&
+	:000000 100755 $zero $newf A	file2/newf
+	:100644 100644 $oldf $oldf R100	file2	file2/oldf
+	:100644 000000 $thrf $zero D	file3
+	EOF
+	git diff-tree -M -r main branch >actual &&
+	compare_diff_raw expect actual
+'
+
+###
+### series D
+###
+
+test_expect_success 'D: inline data in commit' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/branch
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	third
+	COMMIT
+
+	from refs/heads/branch^0
+	M 644 inline newdir/interesting
+	data <<EOF
+	$file5_data
+	EOF
+
+	M 755 inline newdir/exec.sh
+	data <<EOF
+	$file6_data
+	EOF
+
+	INPUT_END
+
+	git fast-import <input &&
+	git whatchanged branch
+'
+
+test_expect_success 'D: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'D: validate new files added' '
+	f5id=$(echo "$file5_data" | git hash-object --stdin) &&
+	f6id=$(echo "$file6_data" | git hash-object --stdin) &&
+	cat >expect <<-EOF &&
+	:000000 100755 $ZERO_OID $f6id A	newdir/exec.sh
+	:000000 100644 $ZERO_OID $f5id A	newdir/interesting
+	EOF
+	git diff-tree -M -r branch^ branch >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'D: verify file5' '
+	echo "$file5_data" >expect &&
+	git cat-file blob branch:newdir/interesting >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'D: verify file6' '
+	echo "$file6_data" >expect &&
+	git cat-file blob branch:newdir/exec.sh >actual &&
+	test_cmp expect actual
+'
+
+###
+### series E
+###
+
+test_expect_success 'E: rfc2822 date, --date-format=raw' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/branch
+	author $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL> Tue Feb 6 11:22:18 2007 -0500
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> Tue Feb 6 12:35:02 2007 -0500
+	data <<COMMIT
+	RFC 2822 type date
+	COMMIT
+
+	from refs/heads/branch^0
+
+	INPUT_END
+
+	test_must_fail git fast-import --date-format=raw <input
+'
+test_expect_success 'E: rfc2822 date, --date-format=rfc2822' '
+	git fast-import --date-format=rfc2822 <input
+'
+
+test_expect_success 'E: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'E: verify commit' '
+	cat >expect <<-EOF &&
+	author $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL> 1170778938 -0500
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1170783302 -0500
+
+	RFC 2822 type date
+	EOF
+	git cat-file commit branch | sed 1,2d >actual &&
+	test_cmp expect actual
+'
+
+###
+### series F
+###
+
+test_expect_success 'F: non-fast-forward update skips' '
+	old_branch=$(git rev-parse --verify branch^0) &&
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/branch
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	losing things already?
+	COMMIT
+
+	from refs/heads/branch~1
+
+	reset refs/heads/other
+	from refs/heads/branch
+
+	INPUT_END
+
+	test_must_fail git fast-import <input &&
+	# branch must remain unaffected
+	test $old_branch = $(git rev-parse --verify branch^0)
+'
+
+test_expect_success 'F: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'F: verify other commit' '
+	cat >expect <<-EOF &&
+	tree $(git rev-parse branch~1^{tree})
+	parent $(git rev-parse branch~1)
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	losing things already?
+	EOF
+	git cat-file commit other >actual &&
+	test_cmp expect actual
+'
+
+###
+### series G
+###
+
+test_expect_success 'G: non-fast-forward update forced' '
+	old_branch=$(git rev-parse --verify branch^0) &&
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/branch
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	losing things already?
+	COMMIT
+
+	from refs/heads/branch~1
+
+	INPUT_END
+	git fast-import --force <input
+'
+
+test_expect_success 'G: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'G: branch changed, but logged' '
+	test $old_branch != $(git rev-parse --verify branch^0) &&
+	test $old_branch = $(git rev-parse --verify branch@{1})
+'
+
+###
+### series H
+###
+
+test_expect_success 'H: deletall, add 1' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/H
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	third
+	COMMIT
+
+	from refs/heads/branch^0
+	M 644 inline i-will-die
+	data <<EOF
+	this file will never exist.
+	EOF
+
+	deleteall
+	M 644 inline h/e/l/lo
+	data <<EOF
+	$file5_data
+	EOF
+
+	INPUT_END
+	git fast-import <input &&
+	git whatchanged H
+'
+
+test_expect_success 'H: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'H: validate old files removed, new files added' '
+	f4id=$(git rev-parse HEAD:file4) &&
+	cat >expect <<-EOF &&
+	:100755 000000 $newf $zero D	file2/newf
+	:100644 000000 $oldf $zero D	file2/oldf
+	:100755 000000 $f4id $zero D	file4
+	:100644 100644 $f5id $f5id R100	newdir/interesting	h/e/l/lo
+	:100755 000000 $f6id $zero D	newdir/exec.sh
+	EOF
+	git diff-tree -M -r H^ H >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'H: verify file' '
+	echo "$file5_data" >expect &&
+	git cat-file blob H:h/e/l/lo >actual &&
+	test_cmp expect actual
+'
+
+###
+### series I
+###
+
+test_expect_success 'I: export-pack-edges' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/export-boundary
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	we have a border.  its only 40 characters wide.
+	COMMIT
+
+	from refs/heads/branch
+
+	INPUT_END
+	git fast-import --export-pack-edges=edges.list <input
+'
+
+test_expect_success 'I: verify edge list' '
+	cat >expect <<-EOF &&
+	.git/objects/pack/pack-.pack: $(git rev-parse --verify export-boundary)
+	EOF
+	sed -e s/pack-.*pack/pack-.pack/ edges.list >actual &&
+	test_cmp expect actual
+'
+
+###
+### series J
+###
+
+test_expect_success 'J: reset existing branch creates empty commit' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/J
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	create J
+	COMMIT
+
+	from refs/heads/branch
+
+	reset refs/heads/J
+
+	commit refs/heads/J
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	initialize J
+	COMMIT
+
+	INPUT_END
+	git fast-import <input
+'
+test_expect_success 'J: branch has 1 commit, empty tree' '
+	test 1 = $(git rev-list J | wc -l) &&
+	test 0 = $(git ls-tree J | wc -l)
+'
+
+test_expect_success 'J: tag must fail on empty branch' '
+	cat >input <<-INPUT_END &&
+	reset refs/heads/J2
+
+	tag wrong_tag
+	from refs/heads/J2
+	data <<EOF
+	Tag branch that was reset.
+	EOF
+	INPUT_END
+	test_must_fail git fast-import <input
+'
+
+###
+### series K
+###
+
+test_expect_success 'K: reinit branch with from' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/K
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	create K
+	COMMIT
+
+	from refs/heads/branch
+
+	commit refs/heads/K
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	redo K
+	COMMIT
+
+	from refs/heads/branch^1
+
+	INPUT_END
+	git fast-import <input
+'
+test_expect_success 'K: verify K^1 = branch^1' '
+	test $(git rev-parse --verify branch^1) \
+		= $(git rev-parse --verify K^1)
+'
+
+###
+### series L
+###
+
+test_expect_success 'L: verify internal tree sorting' '
+	cat >input <<-INPUT_END &&
+	blob
+	mark :1
+	data <<EOF
+	some data
+	EOF
+
+	blob
+	mark :2
+	data <<EOF
+	other data
+	EOF
+
+	commit refs/heads/L
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	create L
+	COMMIT
+
+	M 644 :1 b.
+	M 644 :1 b/other
+	M 644 :1 ba
+
+	commit refs/heads/L
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	update L
+	COMMIT
+
+	M 644 :2 b.
+	M 644 :2 b/other
+	M 644 :2 ba
+	INPUT_END
+
+	cat >expect <<-EXPECT_END &&
+	:100644 100644 M	b.
+	:040000 040000 M	b
+	:100644 100644 M	ba
+	EXPECT_END
+
+	git fast-import <input &&
+	GIT_PRINT_SHA1_ELLIPSIS="yes" git diff-tree --abbrev --raw L^ L >output &&
+	cut -d" " -f1,2,5 output >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'L: nested tree copy does not corrupt deltas' '
+	cat >input <<-INPUT_END &&
+	blob
+	mark :1
+	data <<EOF
+	the data
+	EOF
+
+	commit refs/heads/L2
+	committer C O Mitter <committer@example.com> 1112912473 -0700
+	data <<COMMIT
+	init L2
+	COMMIT
+	M 644 :1 a/b/c
+	M 644 :1 a/b/d
+	M 644 :1 a/e/f
+
+	commit refs/heads/L2
+	committer C O Mitter <committer@example.com> 1112912473 -0700
+	data <<COMMIT
+	update L2
+	COMMIT
+	C a g
+	C a/e g/b
+	M 644 :1 g/b/h
+	INPUT_END
+
+	cat >expect <<-\EOF &&
+	g/b/f
+	g/b/h
+	EOF
+
+	test_when_finished "git update-ref -d refs/heads/L2" &&
+	git fast-import <input &&
+	git ls-tree L2 g/b/ >tmp &&
+	cat tmp | cut -f 2 >actual &&
+	test_cmp expect actual &&
+	git fsck $(git rev-parse L2)
+'
+
+###
+### series M
+###
+
+test_expect_success 'M: rename file in same subdirectory' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/M1
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	file rename
+	COMMIT
+
+	from refs/heads/branch^0
+	R file2/newf file2/n.e.w.f
+
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf R100	file2/newf	file2/n.e.w.f
+	EOF
+	git fast-import <input &&
+	git diff-tree -M -r M1^ M1 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'M: rename file to new subdirectory' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/M2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	file rename
+	COMMIT
+
+	from refs/heads/branch^0
+	R file2/newf i/am/new/to/you
+
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf R100	file2/newf	i/am/new/to/you
+	EOF
+	git fast-import <input &&
+	git diff-tree -M -r M2^ M2 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'M: rename subdirectory to new subdirectory' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/M3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	file rename
+	COMMIT
+
+	from refs/heads/M2^0
+	R i other/sub
+
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf R100	i/am/new/to/you	other/sub/am/new/to/you
+	EOF
+	git fast-import <input &&
+	git diff-tree -M -r M3^ M3 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'M: rename root to subdirectory' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/M4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	rename root
+	COMMIT
+
+	from refs/heads/M2^0
+	R "" sub
+
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	:100644 100644 $oldf $oldf R100	file2/oldf	sub/file2/oldf
+	:100755 100755 $f4id $f4id R100	file4	sub/file4
+	:100755 100755 $newf $newf R100	i/am/new/to/you	sub/i/am/new/to/you
+	:100755 100755 $f6id $f6id R100	newdir/exec.sh	sub/newdir/exec.sh
+	:100644 100644 $f5id $f5id R100	newdir/interesting	sub/newdir/interesting
+	EOF
+	git fast-import <input &&
+	git diff-tree -M -r M4^ M4 >actual &&
+	compare_diff_raw expect actual
+'
+
+###
+### series N
+###
+
+test_expect_success 'N: copy file in same subdirectory' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N1
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	file copy
+	COMMIT
+
+	from refs/heads/branch^0
+	C file2/newf file2/n.e.w.f
+
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf C100	file2/newf	file2/n.e.w.f
+	EOF
+	git fast-import <input &&
+	git diff-tree -C --find-copies-harder -r N1^ N1 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'N: copy then modify subdirectory' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	clean directory copy
+	COMMIT
+
+	from refs/heads/branch^0
+	C file2 file3
+
+	commit refs/heads/N2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	modify directory copy
+	COMMIT
+
+	M 644 inline file3/file5
+	data <<EOF
+	$file5_data
+	EOF
+
+	INPUT_END
+
+	cat >expect <<-EOF &&
+	:100644 100644 $f5id $f5id C100	newdir/interesting	file3/file5
+	:100755 100755 $newf $newf C100	file2/newf	file3/newf
+	:100644 100644 $oldf $oldf C100	file2/oldf	file3/oldf
+	EOF
+	git fast-import <input &&
+	git diff-tree -C --find-copies-harder -r N2^^ N2 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'N: copy dirty subdirectory' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	dirty directory copy
+	COMMIT
+
+	from refs/heads/branch^0
+	M 644 inline file2/file5
+	data <<EOF
+	$file5_data
+	EOF
+
+	C file2 file3
+	D file2/file5
+
+	INPUT_END
+
+	git fast-import <input &&
+	test $(git rev-parse N2^{tree}) = $(git rev-parse N3^{tree})
+'
+
+test_expect_success 'N: copy directory by id' '
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf C100	file2/newf	file3/newf
+	:100644 100644 $oldf $oldf C100	file2/oldf	file3/oldf
+	EOF
+	subdir=$(git rev-parse refs/heads/branch^0:file2) &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy by tree hash
+	COMMIT
+
+	from refs/heads/branch^0
+	M 040000 $subdir file3
+	INPUT_END
+	git fast-import <input &&
+	git diff-tree -C --find-copies-harder -r N4^ N4 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success PIPE 'N: read and copy directory' '
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf C100	file2/newf	file3/newf
+	:100644 100644 $oldf $oldf C100	file2/oldf	file3/oldf
+	EOF
+	git update-ref -d refs/heads/N4 &&
+	rm -f backflow &&
+	mkfifo backflow &&
+	(
+		exec <backflow &&
+		cat <<-EOF &&
+		commit refs/heads/N4
+		committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+		data <<COMMIT
+		copy by tree hash, part 2
+		COMMIT
+
+		from refs/heads/branch^0
+		ls "file2"
+		EOF
+		read mode type tree filename &&
+		echo "M 040000 $tree file3"
+	) |
+	git fast-import --cat-blob-fd=3 3>backflow &&
+	git diff-tree -C --find-copies-harder -r N4^ N4 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success PIPE 'N: empty directory reads as missing' '
+	cat <<-\EOF >expect &&
+	OBJNAME
+	:000000 100644 OBJNAME OBJNAME A	unrelated
+	EOF
+	echo "missing src" >expect.response &&
+	git update-ref -d refs/heads/read-empty &&
+	rm -f backflow &&
+	mkfifo backflow &&
+	(
+		exec <backflow &&
+		cat <<-EOF &&
+		commit refs/heads/read-empty
+		committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+		data <<COMMIT
+		read "empty" (missing) directory
+		COMMIT
+
+		M 100644 inline src/greeting
+		data <<BLOB
+		hello
+		BLOB
+		C src/greeting dst1/non-greeting
+		C src/greeting unrelated
+		# leave behind "empty" src directory
+		D src/greeting
+		ls "src"
+		EOF
+		read -r line &&
+		printf "%s\n" "$line" >response &&
+		cat <<-\EOF
+		D dst1
+		D dst2
+		EOF
+	) |
+	git fast-import --cat-blob-fd=3 3>backflow &&
+	test_cmp expect.response response &&
+	git rev-list read-empty |
+	git diff-tree -r --root --stdin |
+	sed "s/$OID_REGEX/OBJNAME/g" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'N: copy root directory by tree hash' '
+	cat >expect <<-EOF &&
+	:100755 000000 $newf $zero D	file3/newf
+	:100644 000000 $oldf $zero D	file3/oldf
+	EOF
+	root=$(git rev-parse refs/heads/branch^0^{tree}) &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N6
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy root directory by tree hash
+	COMMIT
+
+	from refs/heads/branch^0
+	M 040000 $root ""
+	INPUT_END
+	git fast-import <input &&
+	git diff-tree -C --find-copies-harder -r N4 N6 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'N: copy root by path' '
+	cat >expect <<-EOF &&
+	:100755 100755 $newf $newf C100	file2/newf	oldroot/file2/newf
+	:100644 100644 $oldf $oldf C100	file2/oldf	oldroot/file2/oldf
+	:100755 100755 $f4id $f4id C100	file4	oldroot/file4
+	:100755 100755 $f6id $f6id C100	newdir/exec.sh	oldroot/newdir/exec.sh
+	:100644 100644 $f5id $f5id C100	newdir/interesting	oldroot/newdir/interesting
+	EOF
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N-copy-root-path
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy root directory by (empty) path
+	COMMIT
+
+	from refs/heads/branch^0
+	C "" oldroot
+	INPUT_END
+	git fast-import <input &&
+	git diff-tree -C --find-copies-harder -r branch N-copy-root-path >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'N: delete directory by copying' '
+	cat >expect <<-\EOF &&
+	OBJID
+	:100644 000000 OBJID OBJID D	foo/bar/qux
+	OBJID
+	:000000 100644 OBJID OBJID A	foo/bar/baz
+	:000000 100644 OBJID OBJID A	foo/bar/qux
+	EOF
+	empty_tree=$(git mktree </dev/null) &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N-delete
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	collect data to be deleted
+	COMMIT
+
+	deleteall
+	M 100644 inline foo/bar/baz
+	data <<DATA_END
+	hello
+	DATA_END
+	C "foo/bar/baz" "foo/bar/qux"
+	C "foo/bar/baz" "foo/bar/quux/1"
+	C "foo/bar/baz" "foo/bar/quuux"
+	M 040000 $empty_tree foo/bar/quux
+	M 040000 $empty_tree foo/bar/quuux
+
+	commit refs/heads/N-delete
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	delete subdirectory
+	COMMIT
+
+	M 040000 $empty_tree foo/bar/qux
+	INPUT_END
+	git fast-import <input &&
+	git rev-list N-delete |
+		git diff-tree -r --stdin --root --always |
+		sed -e "s/$OID_REGEX/OBJID/g" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'N: modify copied tree' '
+	cat >expect <<-EOF &&
+	:100644 100644 $f5id $f5id C100	newdir/interesting	file3/file5
+	:100755 100755 $newf $newf C100	file2/newf	file3/newf
+	:100644 100644 $oldf $oldf C100	file2/oldf	file3/oldf
+	EOF
+	subdir=$(git rev-parse refs/heads/branch^0:file2) &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N5
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy by tree hash
+	COMMIT
+
+	from refs/heads/branch^0
+	M 040000 $subdir file3
+
+	commit refs/heads/N5
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	modify directory copy
+	COMMIT
+
+	M 644 inline file3/file5
+	data <<EOF
+	$file5_data
+	EOF
+	INPUT_END
+	git fast-import <input &&
+	git diff-tree -C --find-copies-harder -r N5^^ N5 >actual &&
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'N: reject foo/ syntax' '
+	subdir=$(git rev-parse refs/heads/branch^0:file2) &&
+	test_must_fail git fast-import <<-INPUT_END
+	commit refs/heads/N5B
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy with invalid syntax
+	COMMIT
+
+	from refs/heads/branch^0
+	M 040000 $subdir file3/
+	INPUT_END
+'
+
+test_expect_success 'N: reject foo/ syntax in copy source' '
+	test_must_fail git fast-import <<-INPUT_END
+	commit refs/heads/N5C
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy with invalid syntax
+	COMMIT
+
+	from refs/heads/branch^0
+	C file2/ file3
+	INPUT_END
+'
+
+test_expect_success 'N: reject foo/ syntax in rename source' '
+	test_must_fail git fast-import <<-INPUT_END
+	commit refs/heads/N5D
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	rename with invalid syntax
+	COMMIT
+
+	from refs/heads/branch^0
+	R file2/ file3
+	INPUT_END
+'
+
+test_expect_success 'N: reject foo/ syntax in ls argument' '
+	test_must_fail git fast-import <<-INPUT_END
+	commit refs/heads/N5E
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy with invalid syntax
+	COMMIT
+
+	from refs/heads/branch^0
+	ls "file2/"
+	INPUT_END
+'
+
+test_expect_success 'N: copy to root by id and modify' '
+	echo "hello, world" >expect.foo &&
+	echo hello >expect.bar &&
+	git fast-import <<-SETUP_END &&
+	commit refs/heads/N7
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	hello, tree
+	COMMIT
+
+	deleteall
+	M 644 inline foo/bar
+	data <<EOF
+	hello
+	EOF
+	SETUP_END
+
+	tree=$(git rev-parse --verify N7:) &&
+	git fast-import <<-INPUT_END &&
+	commit refs/heads/N8
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy to root by id and modify
+	COMMIT
+
+	M 040000 $tree ""
+	M 644 inline foo/foo
+	data <<EOF
+	hello, world
+	EOF
+	INPUT_END
+	git show N8:foo/foo >actual.foo &&
+	git show N8:foo/bar >actual.bar &&
+	test_cmp expect.foo actual.foo &&
+	test_cmp expect.bar actual.bar
+'
+
+test_expect_success 'N: extract subtree' '
+	branch=$(git rev-parse --verify refs/heads/branch^{tree}) &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/N9
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	extract subtree branch:newdir
+	COMMIT
+
+	M 040000 $branch ""
+	C "newdir" ""
+	INPUT_END
+	git fast-import <input &&
+	git diff --exit-code branch:newdir N9
+'
+
+test_expect_success 'N: modify subtree, extract it, and modify again' '
+	echo hello >expect.baz &&
+	echo hello, world >expect.qux &&
+	git fast-import <<-SETUP_END &&
+	commit refs/heads/N10
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	hello, tree
+	COMMIT
+
+	deleteall
+	M 644 inline foo/bar/baz
+	data <<EOF
+	hello
+	EOF
+	SETUP_END
+
+	tree=$(git rev-parse --verify N10:) &&
+	git fast-import <<-INPUT_END &&
+	commit refs/heads/N11
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	copy to root by id and modify
+	COMMIT
+
+	M 040000 $tree ""
+	M 100644 inline foo/bar/qux
+	data <<EOF
+	hello, world
+	EOF
+	R "foo" ""
+	C "bar/qux" "bar/quux"
+	INPUT_END
+	git show N11:bar/baz >actual.baz &&
+	git show N11:bar/qux >actual.qux &&
+	git show N11:bar/quux >actual.quux &&
+	test_cmp expect.baz actual.baz &&
+	test_cmp expect.qux actual.qux &&
+	test_cmp expect.qux actual.quux'
+
+###
+### series O
+###
+
+test_expect_success 'O: comments are all skipped' '
+	cat >input <<-INPUT_END &&
+	#we will
+	commit refs/heads/O1
+	# -- ignore all of this text
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	dirty directory copy
+	COMMIT
+
+	# do not forget the import blank line!
+	#
+	# yes, we started from our usual base of branch^0.
+	# i like branch^0.
+	from refs/heads/branch^0
+	# and we need to reuse file2/file5 from N3 above.
+	M 644 inline file2/file5
+	# otherwise the tree will be different
+	data <<EOF
+	$file5_data
+	EOF
+
+	# do not forget to copy file2 to file3
+	C file2 file3
+	#
+	# or to delete file5 from file2.
+	D file2/file5
+	# are we done yet?
+
+	INPUT_END
+
+	git fast-import <input &&
+	test $(git rev-parse N3) = $(git rev-parse O1)
+'
+
+test_expect_success 'O: blank lines not necessary after data commands' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/O2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	dirty directory copy
+	COMMIT
+	from refs/heads/branch^0
+	M 644 inline file2/file5
+	data <<EOF
+	$file5_data
+	EOF
+	C file2 file3
+	D file2/file5
+
+	INPUT_END
+
+	git fast-import <input &&
+	test $(git rev-parse N3) = $(git rev-parse O2)
+'
+
+test_expect_success 'O: repack before next test' '
+	git repack -a -d
+'
+
+test_expect_success 'O: blank lines not necessary after other commands' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/O3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zstring
+	COMMIT
+	commit refs/heads/O3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zof
+	COMMIT
+	checkpoint
+	commit refs/heads/O3
+	mark :5
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zempty
+	COMMIT
+	checkpoint
+	commit refs/heads/O3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zcommits
+	COMMIT
+	reset refs/tags/O3-2nd
+	from :5
+	reset refs/tags/O3-3rd
+	from :5
+	INPUT_END
+
+	cat >expect <<-INPUT_END &&
+	string
+	of
+	empty
+	commits
+	INPUT_END
+
+	git fast-import <input &&
+	ls -la .git/objects/pack/pack-*.pack >packlist &&
+	ls -la .git/objects/pack/pack-*.pack >idxlist &&
+	test_line_count = 4 idxlist &&
+	test_line_count = 4 packlist &&
+	test $(git rev-parse refs/tags/O3-2nd) = $(git rev-parse O3^) &&
+	git log --reverse --pretty=oneline O3 | sed s/^.*z// >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'O: progress outputs as requested by input' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/O4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zstring
+	COMMIT
+	commit refs/heads/O4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zof
+	COMMIT
+	progress Two commits down, 2 to go!
+	commit refs/heads/O4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zempty
+	COMMIT
+	progress Three commits down, 1 to go!
+	commit refs/heads/O4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	zcommits
+	COMMIT
+	progress done!
+	INPUT_END
+	git fast-import <input >actual &&
+	grep "progress " <input >expect &&
+	test_cmp expect actual
+'
+
+###
+### series P (gitlinks)
+###
+
+test_expect_success 'P: superproject & submodule mix' '
+	cat >input <<-INPUT_END &&
+	blob
+	mark :1
+	data 10
+	test file
+
+	reset refs/heads/sub
+	commit refs/heads/sub
+	mark :2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 12
+	sub_initial
+	M 100644 :1 file
+
+	blob
+	mark :3
+	data <<DATAEND
+	[submodule "sub"]
+		path = sub
+		url = "$(pwd)/sub"
+	DATAEND
+
+	commit refs/heads/subuse1
+	mark :4
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 8
+	initial
+	from refs/heads/main
+	M 100644 :3 .gitmodules
+	M 160000 :2 sub
+
+	blob
+	mark :5
+	data 20
+	test file
+	more data
+
+	commit refs/heads/sub
+	mark :6
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 11
+	sub_second
+	from :2
+	M 100644 :5 file
+
+	commit refs/heads/subuse1
+	mark :7
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 7
+	second
+	from :4
+	M 160000 :6 sub
+
+	INPUT_END
+
+	git fast-import <input &&
+	git checkout subuse1 &&
+	rm -rf sub &&
+	mkdir sub &&
+	(
+		cd sub &&
+		git init &&
+		git fetch --update-head-ok .. refs/heads/sub:refs/heads/main &&
+		git checkout main
+	) &&
+	git submodule init &&
+	git submodule update
+'
+
+test_expect_success 'P: verbatim SHA gitlinks' '
+	SUBLAST=$(git rev-parse --verify sub) &&
+	SUBPREV=$(git rev-parse --verify sub^) &&
+
+	cat >input <<-INPUT_END &&
+	blob
+	mark :1
+	data <<DATAEND
+	[submodule "sub"]
+		path = sub
+		url = "$(pwd)/sub"
+	DATAEND
+
+	commit refs/heads/subuse2
+	mark :2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 8
+	initial
+	from refs/heads/main
+	M 100644 :1 .gitmodules
+	M 160000 $SUBPREV sub
+
+	commit refs/heads/subuse2
+	mark :3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 7
+	second
+	from :2
+	M 160000 $SUBLAST sub
+
+	INPUT_END
+
+	git branch -D sub &&
+	git gc &&
+	git prune &&
+	git fast-import <input &&
+	test $(git rev-parse --verify subuse2) = $(git rev-parse --verify subuse1)
+'
+
+test_expect_success 'P: fail on inline gitlink' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/subuse3
+	mark :1
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	corrupt
+	COMMIT
+
+	from refs/heads/subuse2
+	M 160000 inline sub
+	data <<DATA
+	$SUBPREV
+	DATA
+
+	INPUT_END
+
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'P: fail on blob mark in gitlink' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	blob
+	mark :1
+	data <<DATA
+	$SUBPREV
+	DATA
+
+	commit refs/heads/subuse3
+	mark :2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	corrupt
+	COMMIT
+
+	from refs/heads/subuse2
+	M 160000 :1 sub
+
+	INPUT_END
+
+	test_must_fail git fast-import <input
+'
+
+###
+### series Q (notes)
+###
+
+test_expect_success 'Q: commit notes' '
+	note1_data="The first note for the first commit" &&
+	note2_data="The first note for the second commit" &&
+	note3_data="The first note for the third commit" &&
+	note1b_data="The second note for the first commit" &&
+	note1c_data="The third note for the first commit" &&
+	note2b_data="The second note for the second commit" &&
+
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	blob
+	mark :2
+	data <<EOF
+	$file2_data
+	EOF
+
+	commit refs/heads/notes-test
+	mark :3
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	first (:3)
+	COMMIT
+
+	M 644 :2 file2
+
+	blob
+	mark :4
+	data $file4_len
+	$file4_data
+	commit refs/heads/notes-test
+	mark :5
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	second (:5)
+	COMMIT
+
+	M 644 :4 file4
+
+	commit refs/heads/notes-test
+	mark :6
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	third (:6)
+	COMMIT
+
+	M 644 inline file5
+	data <<EOF
+	$file5_data
+	EOF
+
+	M 755 inline file6
+	data <<EOF
+	$file6_data
+	EOF
+
+	blob
+	mark :7
+	data <<EOF
+	$note1_data
+	EOF
+
+	blob
+	mark :8
+	data <<EOF
+	$note2_data
+	EOF
+
+	commit refs/notes/foobar
+	mark :9
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	notes (:9)
+	COMMIT
+
+	N :7 :3
+	N :8 :5
+	N inline :6
+	data <<EOF
+	$note3_data
+	EOF
+
+	commit refs/notes/foobar
+	mark :10
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	notes (:10)
+	COMMIT
+
+	N inline :3
+	data <<EOF
+	$note1b_data
+	EOF
+
+	commit refs/notes/foobar2
+	mark :11
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	notes (:11)
+	COMMIT
+
+	N inline :3
+	data <<EOF
+	$note1c_data
+	EOF
+
+	commit refs/notes/foobar
+	mark :12
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	notes (:12)
+	COMMIT
+
+	deleteall
+	N inline :5
+	data <<EOF
+	$note2b_data
+	EOF
+
+	INPUT_END
+
+	git fast-import <input &&
+	git whatchanged notes-test
+'
+
+test_expect_success 'Q: verify pack' '
+	verify_packs
+'
+
+test_expect_success 'Q: verify first commit' '
+	commit1=$(git rev-parse notes-test~2) &&
+	commit2=$(git rev-parse notes-test^) &&
+	commit3=$(git rev-parse notes-test) &&
+
+	cat >expect <<-EOF &&
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	first (:3)
+	EOF
+	git cat-file commit notes-test~2 | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify second commit' '
+	cat >expect <<-EOF &&
+	parent $commit1
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	second (:5)
+	EOF
+	git cat-file commit notes-test^ | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify third commit' '
+	cat >expect <<-EOF &&
+	parent $commit2
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	third (:6)
+	EOF
+	git cat-file commit notes-test | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first notes commit' '
+	cat >expect <<-EOF &&
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	notes (:9)
+	EOF
+	git cat-file commit refs/notes/foobar~2 | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first notes tree' '
+	cat >expect.unsorted <<-EOF &&
+	100644 blob $commit1
+	100644 blob $commit2
+	100644 blob $commit3
+	EOF
+	cat expect.unsorted | sort >expect &&
+	git cat-file -p refs/notes/foobar~2^{tree} | sed "s/ [0-9a-f]*	/ /" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first note for first commit' '
+	echo "$note1_data" >expect &&
+	git cat-file blob refs/notes/foobar~2:$commit1 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first note for second commit' '
+	echo "$note2_data" >expect &&
+	git cat-file blob refs/notes/foobar~2:$commit2 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first note for third commit' '
+	echo "$note3_data" >expect &&
+	git cat-file blob refs/notes/foobar~2:$commit3 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify second notes commit' '
+	cat >expect <<-EOF &&
+	parent $(git rev-parse --verify refs/notes/foobar~2)
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	notes (:10)
+	EOF
+	git cat-file commit refs/notes/foobar^ | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify second notes tree' '
+	cat >expect.unsorted <<-EOF &&
+	100644 blob $commit1
+	100644 blob $commit2
+	100644 blob $commit3
+	EOF
+	cat expect.unsorted | sort >expect &&
+	git cat-file -p refs/notes/foobar^^{tree} | sed "s/ [0-9a-f]*	/ /" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify second note for first commit' '
+	echo "$note1b_data" >expect &&
+	git cat-file blob refs/notes/foobar^:$commit1 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first note for second commit' '
+	echo "$note2_data" >expect &&
+	git cat-file blob refs/notes/foobar^:$commit2 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify first note for third commit' '
+	echo "$note3_data" >expect &&
+	git cat-file blob refs/notes/foobar^:$commit3 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify third notes commit' '
+	cat >expect <<-EOF &&
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	notes (:11)
+	EOF
+	git cat-file commit refs/notes/foobar2 | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify third notes tree' '
+	cat >expect.unsorted <<-EOF &&
+	100644 blob $commit1
+	EOF
+	cat expect.unsorted | sort >expect &&
+	git cat-file -p refs/notes/foobar2^{tree} | sed "s/ [0-9a-f]*	/ /" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify third note for first commit' '
+	echo "$note1c_data" >expect &&
+	git cat-file blob refs/notes/foobar2:$commit1 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify fourth notes commit' '
+	cat >expect <<-EOF &&
+	parent $(git rev-parse --verify refs/notes/foobar^)
+	author $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+
+	notes (:12)
+	EOF
+	git cat-file commit refs/notes/foobar | sed 1d >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify fourth notes tree' '
+	cat >expect.unsorted <<-EOF &&
+	100644 blob $commit2
+	EOF
+	cat expect.unsorted | sort >expect &&
+	git cat-file -p refs/notes/foobar^{tree} | sed "s/ [0-9a-f]*	/ /" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: verify second note for second commit' '
+	echo "$note2b_data" >expect &&
+	git cat-file blob refs/notes/foobar:$commit2 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Q: deny note on empty branch' '
+	cat >input <<-EOF &&
+	reset refs/heads/Q0
+
+	commit refs/heads/note-Q0
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	Note for an empty branch.
+	COMMIT
+
+	N inline refs/heads/Q0
+	data <<NOTE
+	some note
+	NOTE
+	EOF
+	test_must_fail git fast-import <input
+'
+###
+### series R (feature and option)
+###
+
+test_expect_success 'R: abort on unsupported feature' '
+	cat >input <<-EOF &&
+	feature no-such-feature-exists
+	EOF
+
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'R: supported feature is accepted' '
+	cat >input <<-EOF &&
+	feature date-format=now
+	EOF
+
+	git fast-import <input
+'
+
+test_expect_success 'R: abort on receiving feature after data command' '
+	cat >input <<-EOF &&
+	blob
+	data 3
+	hi
+	feature date-format=now
+	EOF
+
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'R: import-marks features forbidden by default' '
+	>git.marks &&
+	echo "feature import-marks=git.marks" >input &&
+	test_must_fail git fast-import <input &&
+	echo "feature import-marks-if-exists=git.marks" >input &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'R: only one import-marks feature allowed per stream' '
+	>git.marks &&
+	>git2.marks &&
+	cat >input <<-EOF &&
+	feature import-marks=git.marks
+	feature import-marks=git2.marks
+	EOF
+
+	test_must_fail git fast-import --allow-unsafe-features <input
+'
+
+test_expect_success 'R: export-marks feature forbidden by default' '
+	echo "feature export-marks=git.marks" >input &&
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'R: export-marks feature results in a marks file being created' '
+	cat >input <<-EOF &&
+	feature export-marks=git.marks
+	blob
+	mark :1
+	data 3
+	hi
+
+	EOF
+
+	git fast-import --allow-unsafe-features <input &&
+	grep :1 git.marks
+'
+
+test_expect_success 'R: export-marks options can be overridden by commandline options' '
+	cat >input <<-\EOF &&
+	feature export-marks=feature-sub/git.marks
+	blob
+	mark :1
+	data 3
+	hi
+
+	EOF
+	git fast-import --allow-unsafe-features \
+			--export-marks=cmdline-sub/other.marks <input &&
+	grep :1 cmdline-sub/other.marks &&
+	test_path_is_missing feature-sub
+'
+
+test_expect_success 'R: catch typo in marks file name' '
+	test_must_fail git fast-import --import-marks=nonexistent.marks </dev/null &&
+	echo "feature import-marks=nonexistent.marks" |
+	test_must_fail git fast-import --allow-unsafe-features
+'
+
+test_expect_success 'R: import and output marks can be the same file' '
+	rm -f io.marks &&
+	blob=$(echo hi | git hash-object --stdin) &&
+	cat >expect <<-EOF &&
+	:1 $blob
+	:2 $blob
+	EOF
+	git fast-import --export-marks=io.marks <<-\EOF &&
+	blob
+	mark :1
+	data 3
+	hi
+
+	EOF
+	git fast-import --import-marks=io.marks --export-marks=io.marks <<-\EOF &&
+	blob
+	mark :2
+	data 3
+	hi
+
+	EOF
+	test_cmp expect io.marks
+'
+
+test_expect_success 'R: --import-marks=foo --output-marks=foo to create foo fails' '
+	rm -f io.marks &&
+	test_must_fail git fast-import --import-marks=io.marks --export-marks=io.marks <<-\EOF
+	blob
+	mark :1
+	data 3
+	hi
+
+	EOF
+'
+
+test_expect_success 'R: --import-marks-if-exists' '
+	rm -f io.marks &&
+	blob=$(echo hi | git hash-object --stdin) &&
+	echo ":1 $blob" >expect &&
+	git fast-import --import-marks-if-exists=io.marks --export-marks=io.marks <<-\EOF &&
+	blob
+	mark :1
+	data 3
+	hi
+
+	EOF
+	test_cmp expect io.marks
+'
+
+test_expect_success 'R: feature import-marks-if-exists' '
+	rm -f io.marks &&
+
+	git fast-import --export-marks=io.marks \
+			--allow-unsafe-features <<-\EOF &&
+	feature import-marks-if-exists=not_io.marks
+	EOF
+	test_must_be_empty io.marks &&
+
+	blob=$(echo hi | git hash-object --stdin) &&
+
+	echo ":1 $blob" >io.marks &&
+	echo ":1 $blob" >expect &&
+	echo ":2 $blob" >>expect &&
+
+	git fast-import --export-marks=io.marks \
+			--allow-unsafe-features <<-\EOF &&
+	feature import-marks-if-exists=io.marks
+	blob
+	mark :2
+	data 3
+	hi
+
+	EOF
+	test_cmp expect io.marks &&
+
+	echo ":3 $blob" >>expect &&
+
+	git fast-import --import-marks=io.marks \
+			--export-marks=io.marks \
+			--allow-unsafe-features <<-\EOF &&
+	feature import-marks-if-exists=not_io.marks
+	blob
+	mark :3
+	data 3
+	hi
+
+	EOF
+	test_cmp expect io.marks &&
+
+	git fast-import --import-marks-if-exists=not_io.marks \
+			--export-marks=io.marks \
+			--allow-unsafe-features <<-\EOF &&
+	feature import-marks-if-exists=io.marks
+	EOF
+	test_must_be_empty io.marks
+'
+
+test_expect_success 'R: import to output marks works without any content' '
+	cat >input <<-EOF &&
+	feature import-marks=marks.out
+	feature export-marks=marks.new
+	EOF
+
+	git fast-import --allow-unsafe-features <input &&
+	test_cmp marks.out marks.new
+'
+
+test_expect_success 'R: import marks prefers commandline marks file over the stream' '
+	cat >input <<-EOF &&
+	feature import-marks=nonexistent.marks
+	feature export-marks=marks.new
+	EOF
+
+	git fast-import --import-marks=marks.out --allow-unsafe-features <input &&
+	test_cmp marks.out marks.new
+'
+
+
+test_expect_success 'R: multiple --import-marks= should be honoured' '
+	cat >input <<-EOF &&
+	feature import-marks=nonexistent.marks
+	feature export-marks=combined.marks
+	EOF
+
+	head -n2 marks.out > one.marks &&
+	tail -n +3 marks.out > two.marks &&
+	git fast-import --import-marks=one.marks --import-marks=two.marks \
+		--allow-unsafe-features <input &&
+	test_cmp marks.out combined.marks
+'
+
+test_expect_success 'R: feature relative-marks should be honoured' '
+	cat >input <<-EOF &&
+	feature relative-marks
+	feature import-marks=relative.in
+	feature export-marks=relative.out
+	EOF
+
+	mkdir -p .git/info/fast-import/ &&
+	cp marks.new .git/info/fast-import/relative.in &&
+	git fast-import --allow-unsafe-features <input &&
+	test_cmp marks.new .git/info/fast-import/relative.out
+'
+
+test_expect_success 'R: feature no-relative-marks should be honoured' '
+	cat >input <<-EOF &&
+	feature relative-marks
+	feature import-marks=relative.in
+	feature no-relative-marks
+	feature export-marks=non-relative.out
+	EOF
+
+	git fast-import --allow-unsafe-features <input &&
+	test_cmp marks.new non-relative.out
+'
+
+test_expect_success 'R: feature ls supported' '
+	echo "feature ls" |
+	git fast-import
+'
+
+test_expect_success 'R: feature cat-blob supported' '
+	echo "feature cat-blob" |
+	git fast-import
+'
+
+test_expect_success 'R: cat-blob-fd must be a nonnegative integer' '
+	test_must_fail git fast-import --cat-blob-fd=-1 </dev/null
+'
+
+test_expect_success !MINGW 'R: print old blob' '
+	blob=$(echo "yes it can" | git hash-object -w --stdin) &&
+	cat >expect <<-EOF &&
+	${blob} blob 11
+	yes it can
+
+	EOF
+	echo "cat-blob $blob" |
+	git fast-import --cat-blob-fd=6 6>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success !MINGW 'R: in-stream cat-blob-fd not respected' '
+	echo hello >greeting &&
+	blob=$(git hash-object -w greeting) &&
+	cat >expect <<-EOF &&
+	${blob} blob 6
+	hello
+
+	EOF
+	git fast-import --cat-blob-fd=3 3>actual.3 >actual.1 <<-EOF &&
+	cat-blob $blob
+	EOF
+	test_cmp expect actual.3 &&
+	test_must_be_empty actual.1 &&
+	git fast-import 3>actual.3 >actual.1 <<-EOF &&
+	option cat-blob-fd=3
+	cat-blob $blob
+	EOF
+	test_must_be_empty actual.3 &&
+	test_cmp expect actual.1
+'
+
+test_expect_success !MINGW 'R: print mark for new blob' '
+	echo "effluentish" | git hash-object --stdin >expect &&
+	git fast-import --cat-blob-fd=6 6>actual <<-\EOF &&
+	blob
+	mark :1
+	data <<BLOB_END
+	effluentish
+	BLOB_END
+	get-mark :1
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success !MINGW 'R: print new blob' '
+	blob=$(echo "yep yep yep" | git hash-object --stdin) &&
+	cat >expect <<-EOF &&
+	${blob} blob 12
+	yep yep yep
+
+	EOF
+	git fast-import --cat-blob-fd=6 6>actual <<-\EOF &&
+	blob
+	mark :1
+	data <<BLOB_END
+	yep yep yep
+	BLOB_END
+	cat-blob :1
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success !MINGW 'R: print new blob by sha1' '
+	blob=$(echo "a new blob named by sha1" | git hash-object --stdin) &&
+	cat >expect <<-EOF &&
+	${blob} blob 25
+	a new blob named by sha1
+
+	EOF
+	git fast-import --cat-blob-fd=6 6>actual <<-EOF &&
+	blob
+	data <<BLOB_END
+	a new blob named by sha1
+	BLOB_END
+	cat-blob $blob
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'setup: big file' '
+	(
+		echo "the quick brown fox jumps over the lazy dog" >big &&
+		for i in 1 2 3
+		do
+			cat big big big big >bigger &&
+			cat bigger bigger bigger bigger >big ||
+			exit
+		done
+	)
+'
+
+test_expect_success 'R: print two blobs to stdout' '
+	blob1=$(git hash-object big) &&
+	blob1_len=$(wc -c <big) &&
+	blob2=$(echo hello | git hash-object --stdin) &&
+	{
+		echo ${blob1} blob $blob1_len &&
+		cat big &&
+		cat <<-EOF
+
+		${blob2} blob 6
+		hello
+
+		EOF
+	} >expect &&
+	{
+		cat <<-\END_PART1 &&
+			blob
+			mark :1
+			data <<data_end
+		END_PART1
+		cat big &&
+		cat <<-\EOF
+			data_end
+			blob
+			mark :2
+			data <<data_end
+			hello
+			data_end
+			cat-blob :1
+			cat-blob :2
+		EOF
+	} |
+	git fast-import >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success PIPE 'R: copy using cat-file' '
+	expect_id=$(git hash-object big) &&
+	expect_len=$(wc -c <big) &&
+	echo $expect_id blob $expect_len >expect.response &&
+
+	rm -f blobs &&
+
+	mkfifo blobs &&
+	(
+		export GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL GIT_COMMITTER_DATE &&
+		cat <<-\EOF &&
+		feature cat-blob
+		blob
+		mark :1
+		data <<BLOB
+		EOF
+		cat big &&
+		cat <<-\EOF &&
+		BLOB
+		cat-blob :1
+		EOF
+
+		read blob_id type size <&3 &&
+		echo "$blob_id $type $size" >response &&
+		test_copy_bytes $size >blob <&3 &&
+		read newline <&3 &&
+
+		cat <<-EOF &&
+		commit refs/heads/copied
+		committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+		data <<COMMIT
+		copy big file as file3
+		COMMIT
+		M 644 inline file3
+		data <<BLOB
+		EOF
+		cat blob &&
+		echo BLOB
+	) 3<blobs |
+	git fast-import --cat-blob-fd=3 3>blobs &&
+	git show copied:file3 >actual &&
+	test_cmp expect.response response &&
+	test_cmp big actual
+'
+
+test_expect_success PIPE 'R: print blob mid-commit' '
+	rm -f blobs &&
+	echo "A blob from _before_ the commit." >expect &&
+	mkfifo blobs &&
+	(
+		exec 3<blobs &&
+		cat <<-EOF &&
+		feature cat-blob
+		blob
+		mark :1
+		data <<BLOB
+		A blob from _before_ the commit.
+		BLOB
+		commit refs/heads/temporary
+		committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+		data <<COMMIT
+		Empty commit
+		COMMIT
+		cat-blob :1
+		EOF
+
+		read blob_id type size <&3 &&
+		test_copy_bytes $size >actual <&3 &&
+		read newline <&3 &&
+
+		echo
+	) |
+	git fast-import --cat-blob-fd=3 3>blobs &&
+	test_cmp expect actual
+'
+
+test_expect_success PIPE 'R: print staged blob within commit' '
+	rm -f blobs &&
+	echo "A blob from _within_ the commit." >expect &&
+	mkfifo blobs &&
+	(
+		exec 3<blobs &&
+		cat <<-EOF &&
+		feature cat-blob
+		commit refs/heads/within
+		committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+		data <<COMMIT
+		Empty commit
+		COMMIT
+		M 644 inline within
+		data <<BLOB
+		A blob from _within_ the commit.
+		BLOB
+		EOF
+
+		to_get=$(
+			echo "A blob from _within_ the commit." |
+			git hash-object --stdin
+		) &&
+		echo "cat-blob $to_get" &&
+
+		read blob_id type size <&3 &&
+		test_copy_bytes $size >actual <&3 &&
+		read newline <&3 &&
+
+		echo deleteall
+	) |
+	git fast-import --cat-blob-fd=3 3>blobs &&
+	test_cmp expect actual
+'
+
+test_expect_success 'R: quiet option results in no stats being output' '
+	cat >input <<-EOF &&
+	option git quiet
+	blob
+	data 3
+	hi
+
+	EOF
+
+	git fast-import 2>output <input &&
+	test_must_be_empty output
+'
+
+test_expect_success 'R: feature done means terminating "done" is mandatory' '
+	echo feature done | test_must_fail git fast-import &&
+	test_must_fail git fast-import --done </dev/null
+'
+
+test_expect_success 'R: terminating "done" with trailing gibberish is ok' '
+	git fast-import <<-\EOF &&
+	feature done
+	done
+	trailing gibberish
+	EOF
+	git fast-import <<-\EOF
+	done
+	more trailing gibberish
+	EOF
+'
+
+test_expect_success 'R: terminating "done" within commit' '
+	cat >expect <<-\EOF &&
+	OBJID
+	:000000 100644 OBJID OBJID A	hello.c
+	:000000 100644 OBJID OBJID A	hello2.c
+	EOF
+	git fast-import <<-EOF &&
+	commit refs/heads/done-ends
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<EOT
+	Commit terminated by "done" command
+	EOT
+	M 100644 inline hello.c
+	data <<EOT
+	Hello, world.
+	EOT
+	C hello.c hello2.c
+	done
+	EOF
+	git rev-list done-ends |
+	git diff-tree -r --stdin --root --always |
+	sed -e "s/$OID_REGEX/OBJID/g" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'R: die on unknown option' '
+	cat >input <<-EOF &&
+	option git non-existing-option
+	EOF
+
+	test_must_fail git fast-import <input
+'
+
+test_expect_success 'R: unknown commandline options are rejected' '\
+	test_must_fail git fast-import --non-existing-option < /dev/null
+'
+
+test_expect_success 'R: die on invalid option argument' '
+	echo "option git active-branches=-5" |
+	test_must_fail git fast-import &&
+	echo "option git depth=" |
+	test_must_fail git fast-import &&
+	test_must_fail git fast-import --depth="5 elephants" </dev/null
+'
+
+test_expect_success 'R: ignore non-git options' '
+	cat >input <<-EOF &&
+	option non-existing-vcs non-existing-option
+	EOF
+
+	git fast-import <input
+'
+
+test_expect_success 'R: corrupt lines do not mess marks file' '
+	rm -f io.marks &&
+	blob=$(echo hi | git hash-object --stdin) &&
+	cat >expect <<-EOF &&
+	:3 $ZERO_OID
+	:1 $blob
+	:2 $blob
+	EOF
+	cp expect io.marks &&
+	test_must_fail git fast-import --import-marks=io.marks --export-marks=io.marks <<-\EOF &&
+
+	EOF
+	test_cmp expect io.marks
+'
+
+##
+## R: very large blobs
+##
+test_expect_success 'R: blob bigger than threshold' '
+	blobsize=$((2*1024*1024 + 53)) &&
+	test-tool genrandom bar $blobsize >expect &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/big-file
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	R - big file
+	COMMIT
+
+	M 644 inline big1
+	data $blobsize
+	INPUT_END
+	cat expect >>input &&
+	cat >>input <<-INPUT_END &&
+	M 644 inline big2
+	data $blobsize
+	INPUT_END
+	cat expect >>input &&
+	echo >>input &&
+
+	test_create_repo R &&
+	git --git-dir=R/.git config fastimport.unpackLimit 0 &&
+	git --git-dir=R/.git fast-import --big-file-threshold=1 <input
+'
+
+test_expect_success 'R: verify created pack' '
+	(
+		cd R &&
+		verify_packs -v > ../verify
+	)
+'
+
+test_expect_success 'R: verify written objects' '
+	git --git-dir=R/.git cat-file blob big-file:big1 >actual &&
+	test_cmp_bin expect actual &&
+	a=$(git --git-dir=R/.git rev-parse big-file:big1) &&
+	b=$(git --git-dir=R/.git rev-parse big-file:big2) &&
+	test $a = $b
+'
+
+test_expect_success 'R: blob appears only once' '
+	n=$(grep $a verify | wc -l) &&
+	test 1 = $n
+'
+
+###
+### series S
+###
+#
+# Make sure missing spaces and EOLs after mark references
+# cause errors.
+#
+# Setup:
+#
+#   1--2--4
+#    \   /
+#     -3-
+#
+#   commit marks:  301, 302, 303, 304
+#   blob marks:              403, 404, resp.
+#   note mark:          202
+#
+# The error message when a space is missing not at the
+# end of the line is:
+#
+#   Missing space after ..
+#
+# or when extra characters come after the mark at the end
+# of the line:
+#
+#   Garbage after ..
+#
+# or when the dataref is neither "inline " or a known SHA1,
+#
+#   Invalid dataref ..
+#
+test_expect_success 'S: initialize for S tests' '
+	test_tick &&
+
+	cat >input <<-INPUT_END &&
+	commit refs/heads/S
+	mark :301
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit 1
+	COMMIT
+	M 100644 inline hello.c
+	data <<BLOB
+	blob 1
+	BLOB
+
+	commit refs/heads/S
+	mark :302
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit 2
+	COMMIT
+	from :301
+	M 100644 inline hello.c
+	data <<BLOB
+	blob 2
+	BLOB
+
+	blob
+	mark :403
+	data <<BLOB
+	blob 3
+	BLOB
+
+	blob
+	mark :202
+	data <<BLOB
+	note 2
+	BLOB
+	INPUT_END
+
+	git fast-import --export-marks=marks <input
+'
+
+#
+# filemodify, three datarefs
+#
+test_expect_success 'S: filemodify with garbage after mark must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit N
+	COMMIT
+	M 100644 :403x hello.c
+	EOF
+	test_i18ngrep "space after mark" err
+'
+
+# inline is misspelled; fast-import thinks it is some unknown dataref
+test_expect_success 'S: filemodify with garbage after inline must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit N
+	COMMIT
+	M 100644 inlineX hello.c
+	data <<BLOB
+	inline
+	BLOB
+	EOF
+	test_i18ngrep "nvalid dataref" err
+'
+
+test_expect_success 'S: filemodify with garbage after sha1 must fail' '
+	sha1=$(grep :403 marks | cut -d\  -f2) &&
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit N
+	COMMIT
+	M 100644 ${sha1}x hello.c
+	EOF
+	test_i18ngrep "space after SHA1" err
+'
+
+#
+# notemodify, three ways to say dataref
+#
+test_expect_success 'S: notemodify with garbage after mark dataref must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit S note dataref markref
+	COMMIT
+	N :202x :302
+	EOF
+	test_i18ngrep "space after mark" err
+'
+
+test_expect_success 'S: notemodify with garbage after inline dataref must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit S note dataref inline
+	COMMIT
+	N inlineX :302
+	data <<BLOB
+	note blob
+	BLOB
+	EOF
+	test_i18ngrep "nvalid dataref" err
+'
+
+test_expect_success 'S: notemodify with garbage after sha1 dataref must fail' '
+	sha1=$(grep :202 marks | cut -d\  -f2) &&
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit S note dataref sha1
+	COMMIT
+	N ${sha1}x :302
+	EOF
+	test_i18ngrep "space after SHA1" err
+'
+
+#
+# notemodify, mark in commit-ish
+#
+test_expect_success 'S: notemodify with garbage after mark commit-ish must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/Snotes
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit S note commit-ish
+	COMMIT
+	N :202 :302x
+	EOF
+	test_i18ngrep "after mark" err
+'
+
+#
+# from
+#
+test_expect_success 'S: from with garbage after mark must fail' '
+	test_must_fail \
+	git fast-import --import-marks=marks --export-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S2
+	mark :303
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit 3
+	COMMIT
+	from :301x
+	M 100644 :403 hello.c
+	EOF
+
+
+	# go create the commit, need it for merge test
+	git fast-import --import-marks=marks --export-marks=marks <<-EOF &&
+	commit refs/heads/S2
+	mark :303
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	commit 3
+	COMMIT
+	from :301
+	M 100644 :403 hello.c
+	EOF
+
+	# now evaluate the error
+	test_i18ngrep "after mark" err
+'
+
+
+#
+# merge
+#
+test_expect_success 'S: merge with garbage after mark must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	commit refs/heads/S
+	mark :304
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	merge 4
+	COMMIT
+	from :302
+	merge :303x
+	M 100644 :403 hello.c
+	EOF
+	test_i18ngrep "after mark" err
+'
+
+#
+# tag, from markref
+#
+test_expect_success 'S: tag with garbage after mark must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	tag refs/tags/Stag
+	from :302x
+	tagger $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<TAG
+	tag S
+	TAG
+	EOF
+	test_i18ngrep "after mark" err
+'
+
+#
+# cat-blob markref
+#
+test_expect_success 'S: cat-blob with garbage after mark must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	cat-blob :403x
+	EOF
+	test_i18ngrep "after mark" err
+'
+
+#
+# ls markref
+#
+test_expect_success 'S: ls with garbage after mark must fail' '
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	ls :302x hello.c
+	EOF
+	test_i18ngrep "space after mark" err
+'
+
+test_expect_success 'S: ls with garbage after sha1 must fail' '
+	sha1=$(grep :302 marks | cut -d\  -f2) &&
+	test_must_fail git fast-import --import-marks=marks <<-EOF 2>err &&
+	ls ${sha1}x hello.c
+	EOF
+	test_i18ngrep "space after tree-ish" err
+'
+
+###
+### series T (ls)
+###
+# Setup is carried over from series S.
+
+test_expect_success 'T: ls root tree' '
+	sed -e "s/Z\$//" >expect <<-EOF &&
+	040000 tree $(git rev-parse S^{tree})	Z
+	EOF
+	sha1=$(git rev-parse --verify S) &&
+	git fast-import --import-marks=marks <<-EOF >actual &&
+	ls $sha1 ""
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'T: delete branch' '
+	git branch to-delete &&
+	git fast-import <<-EOF &&
+	reset refs/heads/to-delete
+	from $ZERO_OID
+	EOF
+	test_must_fail git rev-parse --verify refs/heads/to-delete
+'
+
+test_expect_success 'T: empty reset doesnt delete branch' '
+	git branch not-to-delete &&
+	git fast-import <<-EOF &&
+	reset refs/heads/not-to-delete
+	EOF
+	git show-ref &&
+	git rev-parse --verify refs/heads/not-to-delete
+'
+
+###
+### series U (filedelete)
+###
+
+test_expect_success 'U: initialize for U tests' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/U
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	test setup
+	COMMIT
+	M 100644 inline hello.c
+	data <<BLOB
+	blob 1
+	BLOB
+	M 100644 inline good/night.txt
+	data <<BLOB
+	sleep well
+	BLOB
+	M 100644 inline good/bye.txt
+	data <<BLOB
+	au revoir
+	BLOB
+
+	INPUT_END
+
+	f7id=$(echo "blob 1" | git hash-object --stdin) &&
+	f8id=$(echo "sleep well" | git hash-object --stdin) &&
+	f9id=$(echo "au revoir" | git hash-object --stdin) &&
+	git fast-import <input
+'
+
+test_expect_success 'U: filedelete file succeeds' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/U
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	delete good/night.txt
+	COMMIT
+	from refs/heads/U^0
+	D good/night.txt
+
+	INPUT_END
+
+	git fast-import <input
+'
+
+test_expect_success 'U: validate file delete result' '
+	cat >expect <<-EOF &&
+	:100644 000000 $f8id $ZERO_OID D	good/night.txt
+	EOF
+
+	git diff-tree -M -r U^1 U >actual &&
+
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'U: filedelete directory succeeds' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/U
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	delete good dir
+	COMMIT
+	from refs/heads/U^0
+	D good
+
+	INPUT_END
+
+	git fast-import <input
+'
+
+test_expect_success 'U: validate directory delete result' '
+	cat >expect <<-EOF &&
+	:100644 000000 $f9id $ZERO_OID D	good/bye.txt
+	EOF
+
+	git diff-tree -M -r U^1 U >actual &&
+
+	compare_diff_raw expect actual
+'
+
+test_expect_success 'U: filedelete root succeeds' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/U
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data <<COMMIT
+	must succeed
+	COMMIT
+	from refs/heads/U^0
+	D ""
+
+	INPUT_END
+
+	git fast-import <input
+'
+
+test_expect_success 'U: validate root delete result' '
+	cat >expect <<-EOF &&
+	:100644 000000 $f7id $ZERO_OID D	hello.c
+	EOF
+
+	git diff-tree -M -r U^1 U >actual &&
+
+	compare_diff_raw expect actual
+'
+
+###
+### series V (checkpoint)
+###
+
+# The commands in input_file should not produce any output on the file
+# descriptor set with --cat-blob-fd (or stdout if unspecified).
+#
+# To make sure you're observing the side effects of checkpoint *before*
+# fast-import terminates (and thus writes out its state), check that the
+# fast-import process is still running using background_import_still_running
+# *after* evaluating the test conditions.
+background_import_then_checkpoint () {
+	options=$1
+	input_file=$2
+
+	mkfifo V.input
+	exec 8<>V.input
+	rm V.input
+
+	mkfifo V.output
+	exec 9<>V.output
+	rm V.output
+
+	(
+		git fast-import $options <&8 >&9 &
+		echo $! >&9
+		wait $!
+		echo >&2 "background fast-import terminated too early with exit code $?"
+		# Un-block the read loop in the main shell process.
+		echo >&9 UNEXPECTED
+	) &
+	sh_pid=$!
+	read fi_pid <&9
+	# We don't mind if fast-import has already died by the time the test
+	# ends.
+	test_when_finished "
+		exec 8>&-; exec 9>&-;
+		kill $sh_pid && wait $sh_pid
+		kill $fi_pid && wait $fi_pid
+		true"
+
+	# Start in the background to ensure we adhere strictly to (blocking)
+	# pipes writing sequence. We want to assume that the write below could
+	# block, e.g. if fast-import blocks writing its own output to &9
+	# because there is no reader on &9 yet.
+	(
+		cat "$input_file"
+		echo "checkpoint"
+		echo "progress checkpoint"
+	) >&8 &
+
+	error=1 ;# assume the worst
+	while read output <&9
+	do
+		if test "$output" = "progress checkpoint"
+		then
+			error=0
+			break
+		elif test "$output" = "UNEXPECTED"
+		then
+			break
+		fi
+		# otherwise ignore cruft
+		echo >&2 "cruft: $output"
+	done
+
+	if test $error -eq 1
+	then
+		false
+	fi
+}
+
+background_import_still_running () {
+	if ! kill -0 "$fi_pid"
+	then
+		echo >&2 "background fast-import terminated too early"
+		false
+	fi
+}
+
+test_expect_success PIPE 'V: checkpoint helper does not get stuck with extra output' '
+	cat >input <<-INPUT_END &&
+	progress foo
+	progress bar
+
+	INPUT_END
+
+	background_import_then_checkpoint "" input &&
+	background_import_still_running
+'
+
+test_expect_success PIPE 'V: checkpoint updates refs after reset' '
+	cat >input <<-\INPUT_END &&
+	reset refs/heads/V
+	from refs/heads/U
+
+	INPUT_END
+
+	background_import_then_checkpoint "" input &&
+	test "$(git rev-parse --verify V)" = "$(git rev-parse --verify U)" &&
+	background_import_still_running
+'
+
+test_expect_success PIPE 'V: checkpoint updates refs and marks after commit' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/V
+	mark :1
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 0
+	from refs/heads/U
+
+	INPUT_END
+
+	background_import_then_checkpoint "--export-marks=marks.actual" input &&
+
+	echo ":1 $(git rev-parse --verify V)" >marks.expected &&
+
+	test "$(git rev-parse --verify V^)" = "$(git rev-parse --verify U)" &&
+	test_cmp marks.expected marks.actual &&
+	background_import_still_running
+'
+
+# Re-create the exact same commit, but on a different branch: no new object is
+# created in the database, but the refs and marks still need to be updated.
+test_expect_success PIPE 'V: checkpoint updates refs and marks after commit (no new objects)' '
+	cat >input <<-INPUT_END &&
+	commit refs/heads/V2
+	mark :2
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 0
+	from refs/heads/U
+
+	INPUT_END
+
+	background_import_then_checkpoint "--export-marks=marks.actual" input &&
+
+	echo ":2 $(git rev-parse --verify V2)" >marks.expected &&
+
+	test "$(git rev-parse --verify V2)" = "$(git rev-parse --verify V)" &&
+	test_cmp marks.expected marks.actual &&
+	background_import_still_running
+'
+
+test_expect_success PIPE 'V: checkpoint updates tags after tag' '
+	cat >input <<-INPUT_END &&
+	tag Vtag
+	from refs/heads/V
+	tagger $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	data 0
+
+	INPUT_END
+
+	background_import_then_checkpoint "" input &&
+	git show-ref -d Vtag &&
+	background_import_still_running
+'
+
+###
+### series W (get-mark and empty orphan commits)
+###
+
+cat >>W-input <<-W_INPUT_END
+	commit refs/heads/W-branch
+	mark :1
+	author Full Name <user@company.tld> 1000000000 +0100
+	committer Full Name <user@company.tld> 1000000000 +0100
+	data 27
+	Intentionally empty commit
+	LFsget-mark :1
+	W_INPUT_END
+
+test_expect_success !MINGW 'W: get-mark & empty orphan commit with no newlines' '
+	sed -e s/LFs// W-input | tr L "\n" | git fast-import
+'
+
+test_expect_success !MINGW 'W: get-mark & empty orphan commit with one newline' '
+	sed -e s/LFs/L/ W-input | tr L "\n" | git fast-import
+'
+
+test_expect_success !MINGW 'W: get-mark & empty orphan commit with ugly second newline' '
+	# Technically, this should fail as it has too many linefeeds
+	# according to the grammar in fast-import.txt.  But, for whatever
+	# reason, it works.  Since using the correct number of newlines
+	# does not work with older (pre-2.22) versions of git, allow apps
+	# that used this second-newline workaround to keep working by
+	# checking it with this test...
+	sed -e s/LFs/LL/ W-input | tr L "\n" | git fast-import
+'
+
+test_expect_success !MINGW 'W: get-mark & empty orphan commit with erroneous third newline' '
+	# ...but do NOT allow more empty lines than that (see previous test).
+	sed -e s/LFs/LLL/ W-input | tr L "\n" | test_must_fail git fast-import
+'
+
+###
+### series X (other new features)
+###
+
+test_expect_success 'X: handling encoding' '
+	test_tick &&
+	cat >input <<-INPUT_END &&
+	commit refs/heads/encoding
+	committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+	encoding iso-8859-7
+	data <<COMMIT
+	INPUT_END
+
+	printf "Pi: \360\nCOMMIT\n" >>input &&
+
+	git fast-import <input &&
+	git cat-file -p encoding | grep $(printf "\360") &&
+	git log -1 --format=%B encoding | grep $(printf "\317\200")
+'
+
+###
+### series Y (submodules and hash algorithms)
+###
+
+cat >Y-sub-input <<\Y_INPUT_END
+blob
+mark :1
+data 4
+foo
+
+reset refs/heads/main
+commit refs/heads/main
+mark :2
+author Full Name <user@company.tld> 1000000000 +0100
+committer Full Name <user@company.tld> 1000000000 +0100
+data 24
+Test submodule commit 1
+M 100644 :1 file
+
+blob
+mark :3
+data 8
+foo
+bar
+
+commit refs/heads/main
+mark :4
+author Full Name <user@company.tld> 1000000001 +0100
+committer Full Name <user@company.tld> 1000000001 +0100
+data 24
+Test submodule commit 2
+from :2
+M 100644 :3 file
+Y_INPUT_END
+
+# Note that the submodule object IDs are intentionally not translated.
+cat >Y-main-input <<\Y_INPUT_END
+blob
+mark :1
+data 4
+foo
+
+reset refs/heads/main
+commit refs/heads/main
+mark :2
+author Full Name <user@company.tld> 2000000000 +0100
+committer Full Name <user@company.tld> 2000000000 +0100
+data 14
+Test commit 1
+M 100644 :1 file
+
+blob
+mark :3
+data 73
+[submodule "sub1"]
+	path = sub1
+	url = https://void.example.com/main.git
+
+commit refs/heads/main
+mark :4
+author Full Name <user@company.tld> 2000000001 +0100
+committer Full Name <user@company.tld> 2000000001 +0100
+data 14
+Test commit 2
+from :2
+M 100644 :3 .gitmodules
+M 160000 0712c5be7cf681388e355ef47525aaf23aee1a6d sub1
+
+blob
+mark :5
+data 8
+foo
+bar
+
+commit refs/heads/main
+mark :6
+author Full Name <user@company.tld> 2000000002 +0100
+committer Full Name <user@company.tld> 2000000002 +0100
+data 14
+Test commit 3
+from :4
+M 100644 :5 file
+M 160000 ff729f5e62f72c0c3978207d9a80e5f3a65f14d7 sub1
+Y_INPUT_END
+
+cat >Y-marks <<\Y_INPUT_END
+:2 0712c5be7cf681388e355ef47525aaf23aee1a6d
+:4 ff729f5e62f72c0c3978207d9a80e5f3a65f14d7
+Y_INPUT_END
+
+test_expect_success 'Y: setup' '
+	test_oid_cache <<-EOF
+	Ymain sha1:9afed2f9161ddf416c0a1863b8b0725b00070504
+	Ymain sha256:c0a1010da1df187b2e287654793df01b464bd6f8e3f17fc1481a7dadf84caee3
+	EOF
+'
+
+test_expect_success 'Y: rewrite submodules' '
+	git init main1 &&
+	(
+		cd main1 &&
+		git init sub2 &&
+		git -C sub2 fast-import --export-marks=../sub2-marks <../Y-sub-input &&
+		git fast-import --rewrite-submodules-from=sub:../Y-marks \
+			--rewrite-submodules-to=sub:sub2-marks <../Y-main-input &&
+		test "$(git rev-parse main)" = "$(test_oid Ymain)"
+	)
+'
+
+test_done