t/t5526-fetch-submodules.sh - jrn/git - Git at Google

 #!/bin/sh
 # Copyright (c) 2010, Jens Lehmann

 test_description='Recursive "git fetch" for submodules'

 . ./test-lib.sh

 pwd=$(pwd)

 add_upstream_commit() {
 	(
 		cd submodule &&
 		head1=$(git rev-parse --short HEAD) &&
 		echo new >> subfile &&
 		test_tick &&
 		git add subfile &&
 		git commit -m new subfile &&
 		head2=$(git rev-parse --short HEAD) &&
 		echo "Fetching submodule submodule" > ../expect.err &&
 		echo "From $pwd/submodule" >> ../expect.err &&
 		echo "   $head1..$head2  master     -> origin/master" >> ../expect.err
 	) &&
 	(
 		cd deepsubmodule &&
 		head1=$(git rev-parse --short HEAD) &&
 		echo new >> deepsubfile &&
 		test_tick &&
 		git add deepsubfile &&
 		git commit -m new deepsubfile &&
 		head2=$(git rev-parse --short HEAD) &&
 		echo "Fetching submodule submodule/subdir/deepsubmodule" >> ../expect.err
 		echo "From $pwd/deepsubmodule" >> ../expect.err &&
 		echo "   $head1..$head2  master     -> origin/master" >> ../expect.err
 	)
 }

 test_expect_success setup '
 	mkdir deepsubmodule &&
 	(
 		cd deepsubmodule &&
 		git init &&
 		echo deepsubcontent > deepsubfile &&
 		git add deepsubfile &&
 		git commit -m new deepsubfile
 	) &&
 	mkdir submodule &&
 	(
 		cd submodule &&
 		git init &&
 		echo subcontent > subfile &&
 		git add subfile &&
 		git submodule add "$pwd/deepsubmodule" subdir/deepsubmodule &&
 		git commit -a -m new
 	) &&
 	git submodule add "$pwd/submodule" submodule &&
 	git commit -am initial &&
 	git clone . downstream &&
 	(
 		cd downstream &&
 		git submodule update --init --recursive
 	)
 '

 test_expect_success "fetch --recurse-submodules recurses into submodules" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		git fetch --recurse-submodules >../actual.out 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "fetch --recurse-submodules -j2 has the same output behaviour" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		GIT_TRACE=$(pwd)/../trace.out git fetch --recurse-submodules -j2 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err &&
 	grep "2 tasks" trace.out
 '

 test_expect_success "fetch alone only fetches superproject" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "fetch --no-recurse-submodules only fetches superproject" '
 	(
 		cd downstream &&
 		git fetch --no-recurse-submodules >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "using fetchRecurseSubmodules=true in .gitmodules recurses into submodules" '
 	(
 		cd downstream &&
 		git config -f .gitmodules submodule.submodule.fetchRecurseSubmodules true &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "--no-recurse-submodules overrides .gitmodules config" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		git fetch --no-recurse-submodules >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "using fetchRecurseSubmodules=false in .git/config overrides setting in .gitmodules" '
 	(
 		cd downstream &&
 		git config submodule.submodule.fetchRecurseSubmodules false &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "--recurse-submodules overrides fetchRecurseSubmodules setting from .git/config" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules >../actual.out 2>../actual.err &&
 		git config --unset -f .gitmodules submodule.submodule.fetchRecurseSubmodules &&
 		git config --unset submodule.submodule.fetchRecurseSubmodules
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "--quiet propagates to submodules" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules --quiet >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "--quiet propagates to parallel submodules" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules -j 2 --quiet  >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "--dry-run propagates to submodules" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		git fetch --recurse-submodules --dry-run >../actual.out 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "Without --dry-run propagates to submodules" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules >../actual.out 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "recurseSubmodules=true propagates into submodules" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		git config fetch.recurseSubmodules true
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "--recurse-submodules overrides config in submodule" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		(
 			cd submodule &&
 			git config fetch.recurseSubmodules false
 		) &&
 		git fetch --recurse-submodules >../actual.out 2>../actual.err
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "--no-recurse-submodules overrides config setting" '
 	add_upstream_commit &&
 	(
 		cd downstream &&
 		git config fetch.recurseSubmodules true
 		git fetch --no-recurse-submodules >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "Recursion doesn't happen when no new commits are fetched in the superproject" '
 	(
 		cd downstream &&
 		(
 			cd submodule &&
 			git config --unset fetch.recurseSubmodules
 		) &&
 		git config --unset fetch.recurseSubmodules
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "Recursion stops when no new submodule commits are fetched" '
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "new submodule" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.sub &&
 	echo "   $head1..$head2  master     -> origin/master" >>expect.err.sub &&
 	head -3 expect.err >> expect.err.sub &&
 	(
 		cd downstream &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	test_i18ncmp expect.err.sub actual.err &&
 	test_must_be_empty actual.out
 '

 test_expect_success "Recursion doesn't happen when new superproject commits don't change any submodules" '
 	add_upstream_commit &&
 	head1=$(git rev-parse --short HEAD) &&
 	echo a > file &&
 	git add file &&
 	git commit -m "new file" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.file &&
 	echo "   $head1..$head2  master     -> origin/master" >> expect.err.file &&
 	(
 		cd downstream &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	test_i18ncmp expect.err.file actual.err
 '

 test_expect_success "Recursion picks up config in submodule" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules &&
 		(
 			cd submodule &&
 			git config fetch.recurseSubmodules true
 		)
 	) &&
 	add_upstream_commit &&
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "new submodule" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.sub &&
 	echo "   $head1..$head2  master     -> origin/master" >> expect.err.sub &&
 	cat expect.err >> expect.err.sub &&
 	(
 		cd downstream &&
 		git fetch >../actual.out 2>../actual.err &&
 		(
 			cd submodule &&
 			git config --unset fetch.recurseSubmodules
 		)
 	) &&
 	test_i18ncmp expect.err.sub actual.err &&
 	test_must_be_empty actual.out
 '

 test_expect_success "Recursion picks up all submodules when necessary" '
 	add_upstream_commit &&
 	(
 		cd submodule &&
 		(
 			cd subdir/deepsubmodule &&
 			git fetch &&
 			git checkout -q FETCH_HEAD
 		) &&
 		head1=$(git rev-parse --short HEAD^) &&
 		git add subdir/deepsubmodule &&
 		git commit -m "new deepsubmodule"
 		head2=$(git rev-parse --short HEAD) &&
 		echo "Fetching submodule submodule" > ../expect.err.sub &&
 		echo "From $pwd/submodule" >> ../expect.err.sub &&
 		echo "   $head1..$head2  master     -> origin/master" >> ../expect.err.sub
 	) &&
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "new submodule" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.2 &&
 	echo "   $head1..$head2  master     -> origin/master" >> expect.err.2 &&
 	cat expect.err.sub >> expect.err.2 &&
 	tail -3 expect.err >> expect.err.2 &&
 	(
 		cd downstream &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	test_i18ncmp expect.err.2 actual.err &&
 	test_must_be_empty actual.out
 '

 test_expect_success "'--recurse-submodules=on-demand' doesn't recurse when no new commits are fetched in the superproject (and ignores config)" '
 	add_upstream_commit &&
 	(
 		cd submodule &&
 		(
 			cd subdir/deepsubmodule &&
 			git fetch &&
 			git checkout -q FETCH_HEAD
 		) &&
 		head1=$(git rev-parse --short HEAD^) &&
 		git add subdir/deepsubmodule &&
 		git commit -m "new deepsubmodule" &&
 		head2=$(git rev-parse --short HEAD) &&
 		echo Fetching submodule submodule > ../expect.err.sub &&
 		echo "From $pwd/submodule" >> ../expect.err.sub &&
 		echo "   $head1..$head2  master     -> origin/master" >> ../expect.err.sub
 	) &&
 	(
 		cd downstream &&
 		git config fetch.recurseSubmodules true &&
 		git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err &&
 		git config --unset fetch.recurseSubmodules
 	) &&
 	! test -s actual.out &&
 	! test -s actual.err
 '

 test_expect_success "'--recurse-submodules=on-demand' recurses as deep as necessary (and ignores config)" '
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "new submodule" &&
 	head2=$(git rev-parse --short HEAD) &&
 	tail -3 expect.err > expect.err.deepsub &&
 	echo "From $pwd/." > expect.err &&
 	echo "   $head1..$head2  master     -> origin/master" >>expect.err &&
 	cat expect.err.sub >> expect.err &&
 	cat expect.err.deepsub >> expect.err &&
 	(
 		cd downstream &&
 		git config fetch.recurseSubmodules false &&
 		(
 			cd submodule &&
 			git config -f .gitmodules submodule.subdir/deepsubmodule.fetchRecursive false
 		) &&
 		git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err &&
 		git config --unset fetch.recurseSubmodules
 		(
 			cd submodule &&
 			git config --unset -f .gitmodules submodule.subdir/deepsubmodule.fetchRecursive
 		)
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success "'--recurse-submodules=on-demand' stops when no new submodule commits are found in the superproject (and ignores config)" '
 	add_upstream_commit &&
 	head1=$(git rev-parse --short HEAD) &&
 	echo a >> file &&
 	git add file &&
 	git commit -m "new file" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.file &&
 	echo "   $head1..$head2  master     -> origin/master" >> expect.err.file &&
 	(
 		cd downstream &&
 		git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	test_i18ncmp expect.err.file actual.err
 '

 test_expect_success "'fetch.recurseSubmodules=on-demand' overrides global config" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules
 	) &&
 	add_upstream_commit &&
 	git config --global fetch.recurseSubmodules false &&
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "new submodule" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.2 &&
 	echo "   $head1..$head2  master     -> origin/master" >>expect.err.2 &&
 	head -3 expect.err >> expect.err.2 &&
 	(
 		cd downstream &&
 		git config fetch.recurseSubmodules on-demand &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	git config --global --unset fetch.recurseSubmodules &&
 	(
 		cd downstream &&
 		git config --unset fetch.recurseSubmodules
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err.2 actual.err
 '

 test_expect_success "'submodule.<sub>.fetchRecurseSubmodules=on-demand' overrides fetch.recurseSubmodules" '
 	(
 		cd downstream &&
 		git fetch --recurse-submodules
 	) &&
 	add_upstream_commit &&
 	git config fetch.recurseSubmodules false &&
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "new submodule" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err.2 &&
 	echo "   $head1..$head2  master     -> origin/master" >>expect.err.2 &&
 	head -3 expect.err >> expect.err.2 &&
 	(
 		cd downstream &&
 		git config submodule.submodule.fetchRecurseSubmodules on-demand &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	git config --unset fetch.recurseSubmodules &&
 	(
 		cd downstream &&
 		git config --unset submodule.submodule.fetchRecurseSubmodules
 	) &&
 	test_must_be_empty actual.out &&
 	test_i18ncmp expect.err.2 actual.err
 '

 test_expect_success "don't fetch submodule when newly recorded commits are already present" '
 	(
 		cd submodule &&
 		git checkout -q HEAD^^
 	) &&
 	head1=$(git rev-parse --short HEAD) &&
 	git add submodule &&
 	git commit -m "submodule rewound" &&
 	head2=$(git rev-parse --short HEAD) &&
 	echo "From $pwd/." > expect.err &&
 	echo "   $head1..$head2  master     -> origin/master" >> expect.err &&
 	(
 		cd downstream &&
 		git fetch >../actual.out 2>../actual.err
 	) &&
 	! test -s actual.out &&
 	test_i18ncmp expect.err actual.err
 '

 test_expect_success 'fetching submodules respects parallel settings' '
 	git config fetch.recurseSubmodules true &&
 	(
 		cd downstream &&
 		GIT_TRACE=$(pwd)/trace.out git fetch --jobs 7 &&
 		grep "7 tasks" trace.out &&
 		git config submodule.fetchJobs 8 &&
 		GIT_TRACE=$(pwd)/trace.out git fetch &&
 		grep "8 tasks" trace.out &&
 		GIT_TRACE=$(pwd)/trace.out git fetch --jobs 9 &&
 		grep "9 tasks" trace.out
 	)
 '

 test_expect_success 'fetching submodule into a broken repository' '
 	# Prepare src and src/sub nested in it
 	git init src &&
 	(
 		cd src &&
 		git init sub &&
 		git -C sub commit --allow-empty -m "initial in sub" &&
 		git submodule add -- ./sub sub &&
 		git commit -m "initial in top"
 	) &&

 	# Clone the old-fashoned way
 	git clone src dst &&
 	git -C dst clone ../src/sub sub &&

 	# Make sure that old-fashoned layout is still supported
 	git -C dst status &&

 	# "diff" would find no change
 	git -C dst diff --exit-code &&

 	# Recursive-fetch works fine
 	git -C dst fetch --recurse-submodules &&

 	# Break the receiving submodule
 	rm -f dst/sub/.git/HEAD &&

 	# NOTE: without the fix the following tests will recurse forever!
 	# They should terminate with an error.

 	test_must_fail git -C dst status &&
 	test_must_fail git -C dst diff &&
 	test_must_fail git -C dst fetch --recurse-submodules
 '

 test_done
	#!/bin/sh
	# Copyright (c) 2010, Jens Lehmann

	test_description='Recursive "git fetch" for submodules'

	. ./test-lib.sh

	pwd=$(pwd)

	add_upstream_commit() {
	(
	cd submodule &&
	head1=$(git rev-parse --short HEAD) &&
	echo new >> subfile &&
	test_tick &&
	git add subfile &&
	git commit -m new subfile &&
	head2=$(git rev-parse --short HEAD) &&
	echo "Fetching submodule submodule" > ../expect.err &&
	echo "From $pwd/submodule" >> ../expect.err &&
	echo " $head1..$head2 master -> origin/master" >> ../expect.err
	) &&
	(
	cd deepsubmodule &&
	head1=$(git rev-parse --short HEAD) &&
	echo new >> deepsubfile &&
	test_tick &&
	git add deepsubfile &&
	git commit -m new deepsubfile &&
	head2=$(git rev-parse --short HEAD) &&
	echo "Fetching submodule submodule/subdir/deepsubmodule" >> ../expect.err
	echo "From $pwd/deepsubmodule" >> ../expect.err &&
	echo " $head1..$head2 master -> origin/master" >> ../expect.err
	)
	}

	test_expect_success setup '
	mkdir deepsubmodule &&
	(
	cd deepsubmodule &&
	git init &&
	echo deepsubcontent > deepsubfile &&
	git add deepsubfile &&
	git commit -m new deepsubfile
	) &&
	mkdir submodule &&
	(
	cd submodule &&
	git init &&
	echo subcontent > subfile &&
	git add subfile &&
	git submodule add "$pwd/deepsubmodule" subdir/deepsubmodule &&
	git commit -a -m new
	) &&
	git submodule add "$pwd/submodule" submodule &&
	git commit -am initial &&
	git clone . downstream &&
	(
	cd downstream &&
	git submodule update --init --recursive
	)
	'

	test_expect_success "fetch --recurse-submodules recurses into submodules" '
	add_upstream_commit &&
	(
	cd downstream &&
	git fetch --recurse-submodules >../actual.out 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "fetch --recurse-submodules -j2 has the same output behaviour" '
	add_upstream_commit &&
	(
	cd downstream &&
	GIT_TRACE=$(pwd)/../trace.out git fetch --recurse-submodules -j2 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err &&
	grep "2 tasks" trace.out
	'

	test_expect_success "fetch alone only fetches superproject" '
	add_upstream_commit &&
	(
	cd downstream &&
	git fetch >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "fetch --no-recurse-submodules only fetches superproject" '
	(
	cd downstream &&
	git fetch --no-recurse-submodules >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "using fetchRecurseSubmodules=true in .gitmodules recurses into submodules" '
	(
	cd downstream &&
	git config -f .gitmodules submodule.submodule.fetchRecurseSubmodules true &&
	git fetch >../actual.out 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "--no-recurse-submodules overrides .gitmodules config" '
	add_upstream_commit &&
	(
	cd downstream &&
	git fetch --no-recurse-submodules >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "using fetchRecurseSubmodules=false in .git/config overrides setting in .gitmodules" '
	(
	cd downstream &&
	git config submodule.submodule.fetchRecurseSubmodules false &&
	git fetch >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "--recurse-submodules overrides fetchRecurseSubmodules setting from .git/config" '
	(
	cd downstream &&
	git fetch --recurse-submodules >../actual.out 2>../actual.err &&
	git config --unset -f .gitmodules submodule.submodule.fetchRecurseSubmodules &&
	git config --unset submodule.submodule.fetchRecurseSubmodules
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "--quiet propagates to submodules" '
	(
	cd downstream &&
	git fetch --recurse-submodules --quiet >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "--quiet propagates to parallel submodules" '
	(
	cd downstream &&
	git fetch --recurse-submodules -j 2 --quiet >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "--dry-run propagates to submodules" '
	add_upstream_commit &&
	(
	cd downstream &&
	git fetch --recurse-submodules --dry-run >../actual.out 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "Without --dry-run propagates to submodules" '
	(
	cd downstream &&
	git fetch --recurse-submodules >../actual.out 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "recurseSubmodules=true propagates into submodules" '
	add_upstream_commit &&
	(
	cd downstream &&
	git config fetch.recurseSubmodules true
	git fetch >../actual.out 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "--recurse-submodules overrides config in submodule" '
	add_upstream_commit &&
	(
	cd downstream &&
	(
	cd submodule &&
	git config fetch.recurseSubmodules false
	) &&
	git fetch --recurse-submodules >../actual.out 2>../actual.err
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "--no-recurse-submodules overrides config setting" '
	add_upstream_commit &&
	(
	cd downstream &&
	git config fetch.recurseSubmodules true
	git fetch --no-recurse-submodules >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "Recursion doesn't happen when no new commits are fetched in the superproject" '
	(
	cd downstream &&
	(
	cd submodule &&
	git config --unset fetch.recurseSubmodules
	) &&
	git config --unset fetch.recurseSubmodules
	git fetch >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "Recursion stops when no new submodule commits are fetched" '
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "new submodule" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.sub &&
	echo " $head1..$head2 master -> origin/master" >>expect.err.sub &&
	head -3 expect.err >> expect.err.sub &&
	(
	cd downstream &&
	git fetch >../actual.out 2>../actual.err
	) &&
	test_i18ncmp expect.err.sub actual.err &&
	test_must_be_empty actual.out
	'

	test_expect_success "Recursion doesn't happen when new superproject commits don't change any submodules" '
	add_upstream_commit &&
	head1=$(git rev-parse --short HEAD) &&
	echo a > file &&
	git add file &&
	git commit -m "new file" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.file &&
	echo " $head1..$head2 master -> origin/master" >> expect.err.file &&
	(
	cd downstream &&
	git fetch >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	test_i18ncmp expect.err.file actual.err
	'

	test_expect_success "Recursion picks up config in submodule" '
	(
	cd downstream &&
	git fetch --recurse-submodules &&
	(
	cd submodule &&
	git config fetch.recurseSubmodules true
	)
	) &&
	add_upstream_commit &&
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "new submodule" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.sub &&
	echo " $head1..$head2 master -> origin/master" >> expect.err.sub &&
	cat expect.err >> expect.err.sub &&
	(
	cd downstream &&
	git fetch >../actual.out 2>../actual.err &&
	(
	cd submodule &&
	git config --unset fetch.recurseSubmodules
	)
	) &&
	test_i18ncmp expect.err.sub actual.err &&
	test_must_be_empty actual.out
	'

	test_expect_success "Recursion picks up all submodules when necessary" '
	add_upstream_commit &&
	(
	cd submodule &&
	(
	cd subdir/deepsubmodule &&
	git fetch &&
	git checkout -q FETCH_HEAD
	) &&
	head1=$(git rev-parse --short HEAD^) &&
	git add subdir/deepsubmodule &&
	git commit -m "new deepsubmodule"
	head2=$(git rev-parse --short HEAD) &&
	echo "Fetching submodule submodule" > ../expect.err.sub &&
	echo "From $pwd/submodule" >> ../expect.err.sub &&
	echo " $head1..$head2 master -> origin/master" >> ../expect.err.sub
	) &&
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "new submodule" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.2 &&
	echo " $head1..$head2 master -> origin/master" >> expect.err.2 &&
	cat expect.err.sub >> expect.err.2 &&
	tail -3 expect.err >> expect.err.2 &&
	(
	cd downstream &&
	git fetch >../actual.out 2>../actual.err
	) &&
	test_i18ncmp expect.err.2 actual.err &&
	test_must_be_empty actual.out
	'

	test_expect_success "'--recurse-submodules=on-demand' doesn't recurse when no new commits are fetched in the superproject (and ignores config)" '
	add_upstream_commit &&
	(
	cd submodule &&
	(
	cd subdir/deepsubmodule &&
	git fetch &&
	git checkout -q FETCH_HEAD
	) &&
	head1=$(git rev-parse --short HEAD^) &&
	git add subdir/deepsubmodule &&
	git commit -m "new deepsubmodule" &&
	head2=$(git rev-parse --short HEAD) &&
	echo Fetching submodule submodule > ../expect.err.sub &&
	echo "From $pwd/submodule" >> ../expect.err.sub &&
	echo " $head1..$head2 master -> origin/master" >> ../expect.err.sub
	) &&
	(
	cd downstream &&
	git config fetch.recurseSubmodules true &&
	git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err &&
	git config --unset fetch.recurseSubmodules
	) &&
	! test -s actual.out &&
	! test -s actual.err
	'

	test_expect_success "'--recurse-submodules=on-demand' recurses as deep as necessary (and ignores config)" '
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "new submodule" &&
	head2=$(git rev-parse --short HEAD) &&
	tail -3 expect.err > expect.err.deepsub &&
	echo "From $pwd/." > expect.err &&
	echo " $head1..$head2 master -> origin/master" >>expect.err &&
	cat expect.err.sub >> expect.err &&
	cat expect.err.deepsub >> expect.err &&
	(
	cd downstream &&
	git config fetch.recurseSubmodules false &&
	(
	cd submodule &&
	git config -f .gitmodules submodule.subdir/deepsubmodule.fetchRecursive false
	) &&
	git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err &&
	git config --unset fetch.recurseSubmodules
	(
	cd submodule &&
	git config --unset -f .gitmodules submodule.subdir/deepsubmodule.fetchRecursive
	)
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success "'--recurse-submodules=on-demand' stops when no new submodule commits are found in the superproject (and ignores config)" '
	add_upstream_commit &&
	head1=$(git rev-parse --short HEAD) &&
	echo a >> file &&
	git add file &&
	git commit -m "new file" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.file &&
	echo " $head1..$head2 master -> origin/master" >> expect.err.file &&
	(
	cd downstream &&
	git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	test_i18ncmp expect.err.file actual.err
	'

	test_expect_success "'fetch.recurseSubmodules=on-demand' overrides global config" '
	(
	cd downstream &&
	git fetch --recurse-submodules
	) &&
	add_upstream_commit &&
	git config --global fetch.recurseSubmodules false &&
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "new submodule" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.2 &&
	echo " $head1..$head2 master -> origin/master" >>expect.err.2 &&
	head -3 expect.err >> expect.err.2 &&
	(
	cd downstream &&
	git config fetch.recurseSubmodules on-demand &&
	git fetch >../actual.out 2>../actual.err
	) &&
	git config --global --unset fetch.recurseSubmodules &&
	(
	cd downstream &&
	git config --unset fetch.recurseSubmodules
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err.2 actual.err
	'

	test_expect_success "'submodule.<sub>.fetchRecurseSubmodules=on-demand' overrides fetch.recurseSubmodules" '
	(
	cd downstream &&
	git fetch --recurse-submodules
	) &&
	add_upstream_commit &&
	git config fetch.recurseSubmodules false &&
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "new submodule" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err.2 &&
	echo " $head1..$head2 master -> origin/master" >>expect.err.2 &&
	head -3 expect.err >> expect.err.2 &&
	(
	cd downstream &&
	git config submodule.submodule.fetchRecurseSubmodules on-demand &&
	git fetch >../actual.out 2>../actual.err
	) &&
	git config --unset fetch.recurseSubmodules &&
	(
	cd downstream &&
	git config --unset submodule.submodule.fetchRecurseSubmodules
	) &&
	test_must_be_empty actual.out &&
	test_i18ncmp expect.err.2 actual.err
	'

	test_expect_success "don't fetch submodule when newly recorded commits are already present" '
	(
	cd submodule &&
	git checkout -q HEAD^^
	) &&
	head1=$(git rev-parse --short HEAD) &&
	git add submodule &&
	git commit -m "submodule rewound" &&
	head2=$(git rev-parse --short HEAD) &&
	echo "From $pwd/." > expect.err &&
	echo " $head1..$head2 master -> origin/master" >> expect.err &&
	(
	cd downstream &&
	git fetch >../actual.out 2>../actual.err
	) &&
	! test -s actual.out &&
	test_i18ncmp expect.err actual.err
	'

	test_expect_success 'fetching submodules respects parallel settings' '
	git config fetch.recurseSubmodules true &&
	(
	cd downstream &&
	GIT_TRACE=$(pwd)/trace.out git fetch --jobs 7 &&
	grep "7 tasks" trace.out &&
	git config submodule.fetchJobs 8 &&
	GIT_TRACE=$(pwd)/trace.out git fetch &&
	grep "8 tasks" trace.out &&
	GIT_TRACE=$(pwd)/trace.out git fetch --jobs 9 &&
	grep "9 tasks" trace.out
	)
	'

	test_expect_success 'fetching submodule into a broken repository' '
	# Prepare src and src/sub nested in it
	git init src &&
	(
	cd src &&
	git init sub &&
	git -C sub commit --allow-empty -m "initial in sub" &&
	git submodule add -- ./sub sub &&
	git commit -m "initial in top"
	) &&

	# Clone the old-fashoned way
	git clone src dst &&
	git -C dst clone ../src/sub sub &&

	# Make sure that old-fashoned layout is still supported
	git -C dst status &&

	# "diff" would find no change
	git -C dst diff --exit-code &&

	# Recursive-fetch works fine
	git -C dst fetch --recurse-submodules &&

	# Break the receiving submodule
	rm -f dst/sub/.git/HEAD &&

	# NOTE: without the fix the following tests will recurse forever!
	# They should terminate with an error.

	test_must_fail git -C dst status &&
	test_must_fail git -C dst diff &&
	test_must_fail git -C dst fetch --recurse-submodules
	'

	test_done