t/t5000-tar-tree.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # Copyright (C) 2005 Rene Scharfe
 #

 test_description='git archive and git get-tar-commit-id test

 This test covers the topics of file contents, commit date handling and
 commit id embedding:

   The contents of the repository is compared to the extracted tar
   archive.  The repository contains simple text files, symlinks and a
   binary file (/bin/sh).  Only paths shorter than 99 characters are
   used.

   git archive applies the commit date to every file in the archive it
   creates.  The test sets the commit date to a specific value and checks
   if the tar archive contains that value.

   When giving git archive a commit id (in contrast to a tree id) it
   embeds this commit id into the tar archive as a comment.  The test
   checks the ability of git get-tar-commit-id to figure it out from the
   tar file.

 '

 . ./test-lib.sh

 SUBSTFORMAT=%H%n

 test_lazy_prereq TAR_NEEDS_PAX_FALLBACK '
 	(
 		mkdir pax &&
 		cd pax &&
 		"$TAR" xf "$TEST_DIRECTORY"/t5000/pax.tar &&
 		test -f PaxHeaders.1791/file
 	)
 '

 test_lazy_prereq GZIP 'gzip --version'

 get_pax_header() {
 	file=$1
 	header=$2=

 	while read len rest
 	do
 		if test "$len" = $(echo "$len $rest" | wc -c)
 		then
 			case "$rest" in
 			$header*)
 				echo "${rest#$header}"
 				;;
 			esac
 		fi
 	done <"$file"
 }

 check_tar() {
 	tarfile=$1.tar
 	listfile=$1.lst
 	dir=$1
 	dir_with_prefix=$dir/$2

 	test_expect_success ' extract tar archive' '
 		(mkdir $dir && cd $dir && "$TAR" xf -) <$tarfile
 	'

 	test_expect_success TAR_NEEDS_PAX_FALLBACK ' interpret pax headers' '
 		(
 			cd $dir &&
 			for header in *.paxheader
 			do
 				data=${header%.paxheader}.data &&
 				if test -h $data || test -e $data
 				then
 					path=$(get_pax_header $header path) &&
 					if test -n "$path"
 					then
 						mv "$data" "$path"
 					fi
 				fi
 			done
 		)
 	'

 	test_expect_success ' validate filenames' '
 		(cd ${dir_with_prefix}a && find .) | sort >$listfile &&
 		test_cmp a.lst $listfile
 	'

 	test_expect_success ' validate file contents' '
 		diff -r a ${dir_with_prefix}a
 	'
 }

 test_expect_success \
     'populate workdir' \
     'mkdir a &&
      echo simple textfile >a/a &&
      ten=0123456789 && hundred=$ten$ten$ten$ten$ten$ten$ten$ten$ten$ten &&
      echo long filename >a/four$hundred &&
      mkdir a/bin &&
      test-tool genrandom "frotz" 500000 >a/bin/sh &&
      printf "A\$Format:%s\$O" "$SUBSTFORMAT" >a/substfile1 &&
      printf "A not substituted O" >a/substfile2 &&
      if test_have_prereq SYMLINKS; then
 	ln -s a a/l1
      else
 	printf %s a > a/l1
      fi &&
      (p=long_path_to_a_file && cd a &&
       for depth in 1 2 3 4 5; do mkdir $p && cd $p; done &&
       echo text >file_with_long_path) &&
      (cd a && find .) | sort >a.lst'

 test_expect_success \
     'add ignored file' \
     'echo ignore me >a/ignored &&
      echo ignored export-ignore >.git/info/attributes'

 test_expect_success 'add files to repository' '
 	git add a &&
 	GIT_COMMITTER_DATE="2005-05-27 22:00" git commit -m initial
 '

 test_expect_success 'setup export-subst' '
 	echo "substfile?" export-subst >>.git/info/attributes &&
 	git log --max-count=1 "--pretty=format:A${SUBSTFORMAT}O" HEAD \
 		>a/substfile1
 '

 test_expect_success \
     'create bare clone' \
     'git clone --bare . bare.git &&
      cp .git/info/attributes bare.git/info/attributes'

 test_expect_success \
     'remove ignored file' \
     'rm a/ignored'

 test_expect_success \
     'git archive' \
     'git archive HEAD >b.tar'

 check_tar b

 test_expect_success 'git archive --prefix=prefix/' '
 	git archive --prefix=prefix/ HEAD >with_prefix.tar
 '

 check_tar with_prefix prefix/

 test_expect_success 'git-archive --prefix=olde-' '
 	git archive --prefix=olde- HEAD >with_olde-prefix.tar
 '

 check_tar with_olde-prefix olde-

 test_expect_success 'git archive on large files' '
     test_config core.bigfilethreshold 1 &&
     git archive HEAD >b3.tar &&
     test_cmp_bin b.tar b3.tar
 '

 test_expect_success \
     'git archive in a bare repo' \
     '(cd bare.git && git archive HEAD) >b3.tar'

 test_expect_success \
     'git archive vs. the same in a bare repo' \
     'test_cmp_bin b.tar b3.tar'

 test_expect_success 'git archive with --output' \
     'git archive --output=b4.tar HEAD &&
     test_cmp_bin b.tar b4.tar'

 test_expect_success 'git archive --remote' \
     'git archive --remote=. HEAD >b5.tar &&
     test_cmp_bin b.tar b5.tar'

 test_expect_success 'git archive --remote with configured remote' '
 	git config remote.foo.url . &&
 	(
 		cd a &&
 		git archive --remote=foo --output=../b5-nick.tar HEAD
 	) &&
 	test_cmp_bin b.tar b5-nick.tar
 '

 test_expect_success \
     'validate file modification time' \
     'mkdir extract &&
      "$TAR" xf b.tar -C extract a/a &&
      test-tool chmtime --get extract/a/a >b.mtime &&
      echo "1117231200" >expected.mtime &&
      test_cmp expected.mtime b.mtime'

 test_expect_success \
     'git get-tar-commit-id' \
     'git get-tar-commit-id <b.tar >b.commitid &&
      test_cmp .git/$(git symbolic-ref HEAD) b.commitid'

 test_expect_success 'git archive with --output, override inferred format' '
 	git archive --format=tar --output=d4.zip HEAD &&
 	test_cmp_bin b.tar d4.zip
 '

 test_expect_success GZIP 'git archive with --output and --remote creates .tgz' '
 	git archive --output=d5.tgz --remote=. HEAD &&
 	gzip -d -c <d5.tgz >d5.tar &&
 	test_cmp_bin b.tar d5.tar
 '

 test_expect_success 'git archive --list outside of a git repo' '
 	nongit git archive --list
 '

 test_expect_success 'git archive --remote outside of a git repo' '
 	git archive HEAD >expect.tar &&
 	nongit git archive --remote="$PWD" HEAD >actual.tar &&
 	test_cmp_bin expect.tar actual.tar
 '

 test_expect_success 'clients cannot access unreachable commits' '
 	test_commit unreachable &&
 	sha1=$(git rev-parse HEAD) &&
 	git reset --hard HEAD^ &&
 	git archive $sha1 >remote.tar &&
 	test_must_fail git archive --remote=. $sha1 >remote.tar
 '

 test_expect_success 'upload-archive can allow unreachable commits' '
 	test_commit unreachable1 &&
 	sha1=$(git rev-parse HEAD) &&
 	git reset --hard HEAD^ &&
 	git archive $sha1 >remote.tar &&
 	test_config uploadarchive.allowUnreachable true &&
 	git archive --remote=. $sha1 >remote.tar
 '

 test_expect_success 'setup tar filters' '
 	git config tar.tar.foo.command "tr ab ba" &&
 	git config tar.bar.command "tr ab ba" &&
 	git config tar.bar.remote true &&
 	git config tar.invalid baz
 '

 test_expect_success 'archive --list mentions user filter' '
 	git archive --list >output &&
 	grep "^tar\.foo\$" output &&
 	grep "^bar\$" output
 '

 test_expect_success 'archive --list shows only enabled remote filters' '
 	git archive --list --remote=. >output &&
 	! grep "^tar\.foo\$" output &&
 	grep "^bar\$" output
 '

 test_expect_success 'invoke tar filter by format' '
 	git archive --format=tar.foo HEAD >config.tar.foo &&
 	tr ab ba <config.tar.foo >config.tar &&
 	test_cmp_bin b.tar config.tar &&
 	git archive --format=bar HEAD >config.bar &&
 	tr ab ba <config.bar >config.tar &&
 	test_cmp_bin b.tar config.tar
 '

 test_expect_success 'invoke tar filter by extension' '
 	git archive -o config-implicit.tar.foo HEAD &&
 	test_cmp_bin config.tar.foo config-implicit.tar.foo &&
 	git archive -o config-implicit.bar HEAD &&
 	test_cmp_bin config.tar.foo config-implicit.bar
 '

 test_expect_success 'default output format remains tar' '
 	git archive -o config-implicit.baz HEAD &&
 	test_cmp_bin b.tar config-implicit.baz
 '

 test_expect_success 'extension matching requires dot' '
 	git archive -o config-implicittar.foo HEAD &&
 	test_cmp_bin b.tar config-implicittar.foo
 '

 test_expect_success 'only enabled filters are available remotely' '
 	test_must_fail git archive --remote=. --format=tar.foo HEAD \
 		>remote.tar.foo &&
 	git archive --remote=. --format=bar >remote.bar HEAD &&
 	test_cmp_bin remote.bar config.bar
 '

 test_expect_success GZIP 'git archive --format=tgz' '
 	git archive --format=tgz HEAD >j.tgz
 '

 test_expect_success GZIP 'git archive --format=tar.gz' '
 	git archive --format=tar.gz HEAD >j1.tar.gz &&
 	test_cmp_bin j.tgz j1.tar.gz
 '

 test_expect_success GZIP 'infer tgz from .tgz filename' '
 	git archive --output=j2.tgz HEAD &&
 	test_cmp_bin j.tgz j2.tgz
 '

 test_expect_success GZIP 'infer tgz from .tar.gz filename' '
 	git archive --output=j3.tar.gz HEAD &&
 	test_cmp_bin j.tgz j3.tar.gz
 '

 test_expect_success GZIP 'extract tgz file' '
 	gzip -d -c <j.tgz >j.tar &&
 	test_cmp_bin b.tar j.tar
 '

 test_expect_success GZIP 'remote tar.gz is allowed by default' '
 	git archive --remote=. --format=tar.gz HEAD >remote.tar.gz &&
 	test_cmp_bin j.tgz remote.tar.gz
 '

 test_expect_success GZIP 'remote tar.gz can be disabled' '
 	git config tar.tar.gz.remote false &&
 	test_must_fail git archive --remote=. --format=tar.gz HEAD \
 		>remote.tar.gz
 '

 test_expect_success 'archive and :(glob)' '
 	git archive -v HEAD -- ":(glob)**/sh" >/dev/null 2>actual &&
 	cat >expect <<EOF &&
 a/
 a/bin/
 a/bin/sh
 EOF
 	test_cmp expect actual
 '

 test_expect_success 'catch non-matching pathspec' '
 	test_must_fail git archive -v HEAD -- "*.abc" >/dev/null
 '

 # Pull the size and date of each entry in a tarfile using the system tar.
 #
 # We'll pull out only the year from the date; that avoids any question of
 # timezones impacting the result (as long as we keep our test times away from a
 # year boundary; our reference times are all in August).
 #
 # The output of tar_info is expected to be "<size> <year>", both in decimal. It
 # ignores the return value of tar. We have to do this, because some of our test
 # input is only partial (the real data is 64GB in some cases).
 tar_info () {
 	"$TAR" tvf "$1" |
 	awk '{
 		split($4, date, "-")
 		print $3 " " date[1]
 	}'
 }

 # See if our system tar can handle a tar file with huge sizes and dates far in
 # the future, and that we can actually parse its output.
 #
 # The reference file was generated by GNU tar, and the magic time and size are
 # both octal 01000000000001, which overflows normal ustar fields.
 test_lazy_prereq TAR_HUGE '
 	echo "68719476737 4147" >expect &&
 	tar_info "$TEST_DIRECTORY"/t5000/huge-and-future.tar >actual &&
 	test_cmp expect actual
 '

 test_expect_success LONG_IS_64BIT 'set up repository with huge blob' '
 	obj_d=19 &&
 	obj_f=f9c8273ec45a8938e6999cb59b3ff66739902a &&
 	obj=${obj_d}${obj_f} &&
 	mkdir -p .git/objects/$obj_d &&
 	cp "$TEST_DIRECTORY"/t5000/$obj .git/objects/$obj_d/$obj_f &&
 	rm -f .git/index &&
 	git update-index --add --cacheinfo 100644,$obj,huge &&
 	git commit -m huge
 '

 # We expect git to die with SIGPIPE here (otherwise we
 # would generate the whole 64GB).
 test_expect_success LONG_IS_64BIT 'generate tar with huge size' '
 	{
 		git archive HEAD
 		echo $? >exit-code
 	} | test_copy_bytes 4096 >huge.tar &&
 	echo 141 >expect &&
 	test_cmp expect exit-code
 '

 test_expect_success TAR_HUGE,LONG_IS_64BIT 'system tar can read our huge size' '
 	echo 68719476737 >expect &&
 	tar_info huge.tar | cut -d" " -f1 >actual &&
 	test_cmp expect actual
 '

 test_expect_success TIME_IS_64BIT 'set up repository with far-future commit' '
 	rm -f .git/index &&
 	echo content >file &&
 	git add file &&
 	GIT_COMMITTER_DATE="@68719476737 +0000" \
 		git commit -m "tempori parendum"
 '

 test_expect_success TIME_IS_64BIT 'generate tar with future mtime' '
 	git archive HEAD >future.tar
 '

 test_expect_success TAR_HUGE,TIME_IS_64BIT,TIME_T_IS_64BIT 'system tar can read our future mtime' '
 	echo 4147 >expect &&
 	tar_info future.tar | cut -d" " -f2 >actual &&
 	test_cmp expect actual
 '

 test_done
	#!/bin/sh
	#
	# Copyright (C) 2005 Rene Scharfe
	#

	test_description='git archive and git get-tar-commit-id test

	This test covers the topics of file contents, commit date handling and
	commit id embedding:

	The contents of the repository is compared to the extracted tar
	archive. The repository contains simple text files, symlinks and a
	binary file (/bin/sh). Only paths shorter than 99 characters are
	used.

	git archive applies the commit date to every file in the archive it
	creates. The test sets the commit date to a specific value and checks
	if the tar archive contains that value.

	When giving git archive a commit id (in contrast to a tree id) it
	embeds this commit id into the tar archive as a comment. The test
	checks the ability of git get-tar-commit-id to figure it out from the
	tar file.

	'

	. ./test-lib.sh

	SUBSTFORMAT=%H%n

	test_lazy_prereq TAR_NEEDS_PAX_FALLBACK '
	(
	mkdir pax &&
	cd pax &&
	"$TAR" xf "$TEST_DIRECTORY"/t5000/pax.tar &&
	test -f PaxHeaders.1791/file
	)
	'

	test_lazy_prereq GZIP 'gzip --version'

	get_pax_header() {
	file=$1
	header=$2=

	while read len rest
	do
	if test "$len" = $(echo "$len $rest" \| wc -c)
	then
	case "$rest" in
	$header*)
	echo "${rest#$header}"
	;;
	esac
	fi
	done <"$file"
	}

	check_tar() {
	tarfile=$1.tar
	listfile=$1.lst
	dir=$1
	dir_with_prefix=$dir/$2

	test_expect_success ' extract tar archive' '
	(mkdir $dir && cd $dir && "$TAR" xf -) <$tarfile
	'

	test_expect_success TAR_NEEDS_PAX_FALLBACK ' interpret pax headers' '
	(
	cd $dir &&
	for header in *.paxheader
	do
	data=${header%.paxheader}.data &&
	if test -h $data \|\| test -e $data
	then
	path=$(get_pax_header $header path) &&
	if test -n "$path"
	then
	mv "$data" "$path"
	fi
	fi
	done
	)
	'

	test_expect_success ' validate filenames' '
	(cd ${dir_with_prefix}a && find .) \| sort >$listfile &&
	test_cmp a.lst $listfile
	'

	test_expect_success ' validate file contents' '
	diff -r a ${dir_with_prefix}a
	'
	}

	test_expect_success \
	'populate workdir' \
	'mkdir a &&
	echo simple textfile >a/a &&
	ten=0123456789 && hundred=$ten$ten$ten$ten$ten$ten$ten$ten$ten$ten &&
	echo long filename >a/four$hundred &&
	mkdir a/bin &&
	test-tool genrandom "frotz" 500000 >a/bin/sh &&
	printf "A\$Format:%s\$O" "$SUBSTFORMAT" >a/substfile1 &&
	printf "A not substituted O" >a/substfile2 &&
	if test_have_prereq SYMLINKS; then
	ln -s a a/l1
	else
	printf %s a > a/l1
	fi &&
	(p=long_path_to_a_file && cd a &&
	for depth in 1 2 3 4 5; do mkdir $p && cd $p; done &&
	echo text >file_with_long_path) &&
	(cd a && find .) \| sort >a.lst'

	test_expect_success \
	'add ignored file' \
	'echo ignore me >a/ignored &&
	echo ignored export-ignore >.git/info/attributes'

	test_expect_success 'add files to repository' '
	git add a &&
	GIT_COMMITTER_DATE="2005-05-27 22:00" git commit -m initial
	'

	test_expect_success 'setup export-subst' '
	echo "substfile?" export-subst >>.git/info/attributes &&
	git log --max-count=1 "--pretty=format:A${SUBSTFORMAT}O" HEAD \
	>a/substfile1
	'

	test_expect_success \
	'create bare clone' \
	'git clone --bare . bare.git &&
	cp .git/info/attributes bare.git/info/attributes'

	test_expect_success \
	'remove ignored file' \
	'rm a/ignored'

	test_expect_success \
	'git archive' \
	'git archive HEAD >b.tar'

	check_tar b

	test_expect_success 'git archive --prefix=prefix/' '
	git archive --prefix=prefix/ HEAD >with_prefix.tar
	'

	check_tar with_prefix prefix/

	test_expect_success 'git-archive --prefix=olde-' '
	git archive --prefix=olde- HEAD >with_olde-prefix.tar
	'

	check_tar with_olde-prefix olde-

	test_expect_success 'git archive on large files' '
	test_config core.bigfilethreshold 1 &&
	git archive HEAD >b3.tar &&
	test_cmp_bin b.tar b3.tar
	'

	test_expect_success \
	'git archive in a bare repo' \
	'(cd bare.git && git archive HEAD) >b3.tar'

	test_expect_success \
	'git archive vs. the same in a bare repo' \
	'test_cmp_bin b.tar b3.tar'

	test_expect_success 'git archive with --output' \
	'git archive --output=b4.tar HEAD &&
	test_cmp_bin b.tar b4.tar'

	test_expect_success 'git archive --remote' \
	'git archive --remote=. HEAD >b5.tar &&
	test_cmp_bin b.tar b5.tar'

	test_expect_success 'git archive --remote with configured remote' '
	git config remote.foo.url . &&
	(
	cd a &&
	git archive --remote=foo --output=../b5-nick.tar HEAD
	) &&
	test_cmp_bin b.tar b5-nick.tar
	'

	test_expect_success \
	'validate file modification time' \
	'mkdir extract &&
	"$TAR" xf b.tar -C extract a/a &&
	test-tool chmtime --get extract/a/a >b.mtime &&
	echo "1117231200" >expected.mtime &&
	test_cmp expected.mtime b.mtime'

	test_expect_success \
	'git get-tar-commit-id' \
	'git get-tar-commit-id <b.tar >b.commitid &&
	test_cmp .git/$(git symbolic-ref HEAD) b.commitid'

	test_expect_success 'git archive with --output, override inferred format' '
	git archive --format=tar --output=d4.zip HEAD &&
	test_cmp_bin b.tar d4.zip
	'

	test_expect_success GZIP 'git archive with --output and --remote creates .tgz' '
	git archive --output=d5.tgz --remote=. HEAD &&
	gzip -d -c <d5.tgz >d5.tar &&
	test_cmp_bin b.tar d5.tar
	'

	test_expect_success 'git archive --list outside of a git repo' '
	nongit git archive --list
	'

	test_expect_success 'git archive --remote outside of a git repo' '
	git archive HEAD >expect.tar &&
	nongit git archive --remote="$PWD" HEAD >actual.tar &&
	test_cmp_bin expect.tar actual.tar
	'

	test_expect_success 'clients cannot access unreachable commits' '
	test_commit unreachable &&
	sha1=$(git rev-parse HEAD) &&
	git reset --hard HEAD^ &&
	git archive $sha1 >remote.tar &&
	test_must_fail git archive --remote=. $sha1 >remote.tar
	'

	test_expect_success 'upload-archive can allow unreachable commits' '
	test_commit unreachable1 &&
	sha1=$(git rev-parse HEAD) &&
	git reset --hard HEAD^ &&
	git archive $sha1 >remote.tar &&
	test_config uploadarchive.allowUnreachable true &&
	git archive --remote=. $sha1 >remote.tar
	'

	test_expect_success 'setup tar filters' '
	git config tar.tar.foo.command "tr ab ba" &&
	git config tar.bar.command "tr ab ba" &&
	git config tar.bar.remote true &&
	git config tar.invalid baz
	'

	test_expect_success 'archive --list mentions user filter' '
	git archive --list >output &&
	grep "^tar\.foo\$" output &&
	grep "^bar\$" output
	'

	test_expect_success 'archive --list shows only enabled remote filters' '
	git archive --list --remote=. >output &&
	! grep "^tar\.foo\$" output &&
	grep "^bar\$" output
	'

	test_expect_success 'invoke tar filter by format' '
	git archive --format=tar.foo HEAD >config.tar.foo &&
	tr ab ba <config.tar.foo >config.tar &&
	test_cmp_bin b.tar config.tar &&
	git archive --format=bar HEAD >config.bar &&
	tr ab ba <config.bar >config.tar &&
	test_cmp_bin b.tar config.tar
	'

	test_expect_success 'invoke tar filter by extension' '
	git archive -o config-implicit.tar.foo HEAD &&
	test_cmp_bin config.tar.foo config-implicit.tar.foo &&
	git archive -o config-implicit.bar HEAD &&
	test_cmp_bin config.tar.foo config-implicit.bar
	'

	test_expect_success 'default output format remains tar' '
	git archive -o config-implicit.baz HEAD &&
	test_cmp_bin b.tar config-implicit.baz
	'

	test_expect_success 'extension matching requires dot' '
	git archive -o config-implicittar.foo HEAD &&
	test_cmp_bin b.tar config-implicittar.foo
	'

	test_expect_success 'only enabled filters are available remotely' '
	test_must_fail git archive --remote=. --format=tar.foo HEAD \
	>remote.tar.foo &&
	git archive --remote=. --format=bar >remote.bar HEAD &&
	test_cmp_bin remote.bar config.bar
	'

	test_expect_success GZIP 'git archive --format=tgz' '
	git archive --format=tgz HEAD >j.tgz
	'

	test_expect_success GZIP 'git archive --format=tar.gz' '
	git archive --format=tar.gz HEAD >j1.tar.gz &&
	test_cmp_bin j.tgz j1.tar.gz
	'

	test_expect_success GZIP 'infer tgz from .tgz filename' '
	git archive --output=j2.tgz HEAD &&
	test_cmp_bin j.tgz j2.tgz
	'

	test_expect_success GZIP 'infer tgz from .tar.gz filename' '
	git archive --output=j3.tar.gz HEAD &&
	test_cmp_bin j.tgz j3.tar.gz
	'

	test_expect_success GZIP 'extract tgz file' '
	gzip -d -c <j.tgz >j.tar &&
	test_cmp_bin b.tar j.tar
	'

	test_expect_success GZIP 'remote tar.gz is allowed by default' '
	git archive --remote=. --format=tar.gz HEAD >remote.tar.gz &&
	test_cmp_bin j.tgz remote.tar.gz
	'

	test_expect_success GZIP 'remote tar.gz can be disabled' '
	git config tar.tar.gz.remote false &&
	test_must_fail git archive --remote=. --format=tar.gz HEAD \
	>remote.tar.gz
	'

	test_expect_success 'archive and :(glob)' '
	git archive -v HEAD -- ":(glob)**/sh" >/dev/null 2>actual &&
	cat >expect <<EOF &&
	a/
	a/bin/
	a/bin/sh
	EOF
	test_cmp expect actual
	'

	test_expect_success 'catch non-matching pathspec' '
	test_must_fail git archive -v HEAD -- "*.abc" >/dev/null
	'

	# Pull the size and date of each entry in a tarfile using the system tar.
	#
	# We'll pull out only the year from the date; that avoids any question of
	# timezones impacting the result (as long as we keep our test times away from a
	# year boundary; our reference times are all in August).
	#
	# The output of tar_info is expected to be "<size> <year>", both in decimal. It
	# ignores the return value of tar. We have to do this, because some of our test
	# input is only partial (the real data is 64GB in some cases).
	tar_info () {
	"$TAR" tvf "$1" \|
	awk '{
	split($4, date, "-")
	print $3 " " date[1]
	}'
	}

	# See if our system tar can handle a tar file with huge sizes and dates far in
	# the future, and that we can actually parse its output.
	#
	# The reference file was generated by GNU tar, and the magic time and size are
	# both octal 01000000000001, which overflows normal ustar fields.
	test_lazy_prereq TAR_HUGE '
	echo "68719476737 4147" >expect &&
	tar_info "$TEST_DIRECTORY"/t5000/huge-and-future.tar >actual &&
	test_cmp expect actual
	'

	test_expect_success LONG_IS_64BIT 'set up repository with huge blob' '
	obj_d=19 &&
	obj_f=f9c8273ec45a8938e6999cb59b3ff66739902a &&
	obj=${obj_d}${obj_f} &&
	mkdir -p .git/objects/$obj_d &&
	cp "$TEST_DIRECTORY"/t5000/$obj .git/objects/$obj_d/$obj_f &&
	rm -f .git/index &&
	git update-index --add --cacheinfo 100644,$obj,huge &&
	git commit -m huge
	'

	# We expect git to die with SIGPIPE here (otherwise we
	# would generate the whole 64GB).
	test_expect_success LONG_IS_64BIT 'generate tar with huge size' '
	{
	git archive HEAD
	echo $? >exit-code
	} \| test_copy_bytes 4096 >huge.tar &&
	echo 141 >expect &&
	test_cmp expect exit-code
	'

	test_expect_success TAR_HUGE,LONG_IS_64BIT 'system tar can read our huge size' '
	echo 68719476737 >expect &&
	tar_info huge.tar \| cut -d" " -f1 >actual &&
	test_cmp expect actual
	'

	test_expect_success TIME_IS_64BIT 'set up repository with far-future commit' '
	rm -f .git/index &&
	echo content >file &&
	git add file &&
	GIT_COMMITTER_DATE="@68719476737 +0000" \
	git commit -m "tempori parendum"
	'

	test_expect_success TIME_IS_64BIT 'generate tar with future mtime' '
	git archive HEAD >future.tar
	'

	test_expect_success TAR_HUGE,TIME_IS_64BIT,TIME_T_IS_64BIT 'system tar can read our future mtime' '
	echo 4147 >expect &&
	tar_info future.tar \| cut -d" " -f2 >actual &&
	test_cmp expect actual
	'

	test_done