t/t4041-diff-submodule-option.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # Copyright (c) 2009 Jens Lehmann, based on t7401 by Ping Yin
 # Copyright (c) 2011 Alexey Shumkin (+ non-UTF-8 commit encoding tests)
 #

 test_description='Support for verbose submodule differences in git diff

 This test tries to verify the sanity of the --submodule option of git diff.
 '

 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

 . ./test-lib.sh

 # Test non-UTF-8 encoding in case iconv is available.
 if test_have_prereq ICONV
 then
 	test_encoding="ISO8859-1"
 	# String "added" in German (translated with Google Translate), encoded in UTF-8,
 	# used in sample commit log messages in add_file() function below.
 	added=$(printf "hinzugef\303\274gt")
 else
 	test_encoding="UTF-8"
 	added="added"
 fi

 add_file () {
 	(
 		cd "$1" &&
 		shift &&
 		for name
 		do
 			echo "$name" >"$name" &&
 			git add "$name" &&
 			test_tick &&
 			# "git commit -m" would break MinGW, as Windows refuse to pass
 			# $test_encoding encoded parameter to git.
 			echo "Add $name ($added $name)" | iconv -f utf-8 -t $test_encoding |
 			git -c "i18n.commitEncoding=$test_encoding" commit -F -
 		done >/dev/null &&
 		git rev-parse --short --verify HEAD
 	)
 }
 commit_file () {
 	test_tick &&
 	git commit "$@" -m "Commit $*" >/dev/null
 }

 test_create_repo sm1 &&
 add_file . foo >/dev/null

 head1=$(add_file sm1 foo1 foo2)
 fullhead1=$(cd sm1; git rev-parse --verify HEAD)

 test_expect_success 'added submodule' '
 	git add sm1 &&
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 0000000...$head1 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'added submodule, set diff.submodule' '
 	git config diff.submodule log &&
 	git add sm1 &&
 	git diff --cached >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 0000000...$head1 (new submodule)
 	EOF
 	git config --unset diff.submodule &&
 	test_cmp expected actual
 '

 test_expect_success '--submodule=short overrides diff.submodule' '
 	test_config diff.submodule log &&
 	git add sm1 &&
 	git diff --submodule=short --cached >actual &&
 	cat >expected <<-EOF &&
 	diff --git a/sm1 b/sm1
 	new file mode 160000
 	index 0000000..$head1
 	--- /dev/null
 	+++ b/sm1
 	@@ -0,0 +1 @@
 	+Subproject commit $fullhead1
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'diff.submodule does not affect plumbing' '
 	test_config diff.submodule log &&
 	git diff-index -p HEAD >actual &&
 	cat >expected <<-EOF &&
 	diff --git a/sm1 b/sm1
 	new file mode 160000
 	index 0000000..$head1
 	--- /dev/null
 	+++ b/sm1
 	@@ -0,0 +1 @@
 	+Subproject commit $fullhead1
 	EOF
 	test_cmp expected actual
 '

 commit_file sm1 &&
 head2=$(add_file sm1 foo3)

 test_expect_success 'modified submodule(forward)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head1..$head2:
 	  > Add foo3 ($added foo3)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule(forward)' '
 	git diff --submodule=log >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head1..$head2:
 	  > Add foo3 ($added foo3)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule(forward) --submodule' '
 	git diff --submodule >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head1..$head2:
 	  > Add foo3 ($added foo3)
 	EOF
 	test_cmp expected actual
 '

 fullhead2=$(cd sm1; git rev-parse --verify HEAD)
 test_expect_success 'modified submodule(forward) --submodule=short' '
 	git diff --submodule=short >actual &&
 	cat >expected <<-EOF &&
 	diff --git a/sm1 b/sm1
 	index $head1..$head2 160000
 	--- a/sm1
 	+++ b/sm1
 	@@ -1 +1 @@
 	-Subproject commit $fullhead1
 	+Subproject commit $fullhead2
 	EOF
 	test_cmp expected actual
 '

 commit_file sm1 &&
 head3=$(
 	cd sm1 &&
 	git reset --hard HEAD~2 >/dev/null &&
 	git rev-parse --short --verify HEAD
 )

 test_expect_success 'modified submodule(backward)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head2..$head3 (rewind):
 	  < Add foo3 ($added foo3)
 	  < Add foo2 ($added foo2)
 	EOF
 	test_cmp expected actual
 '

 head4=$(add_file sm1 foo4 foo5)
 test_expect_success 'modified submodule(backward and forward)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head2...$head4:
 	  > Add foo5 ($added foo5)
 	  > Add foo4 ($added foo4)
 	  < Add foo3 ($added foo3)
 	  < Add foo2 ($added foo2)
 	EOF
 	test_cmp expected actual
 '

 commit_file sm1 &&
 mv sm1 sm1-bak &&
 echo sm1 >sm1 &&
 head5=$(git hash-object sm1 | cut -c1-7) &&
 git add sm1 &&
 rm -f sm1 &&
 mv sm1-bak sm1

 test_expect_success 'typechanged submodule(submodule->blob), --cached' '
 	git diff --submodule=log --cached >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head4...0000000 (submodule deleted)
 	diff --git a/sm1 b/sm1
 	new file mode 100644
 	index 0000000..$head5
 	--- /dev/null
 	+++ b/sm1
 	@@ -0,0 +1 @@
 	+sm1
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'typechanged submodule(submodule->blob)' '
 	git diff --submodule=log >actual &&
 	cat >expected <<-EOF &&
 	diff --git a/sm1 b/sm1
 	deleted file mode 100644
 	index $head5..0000000
 	--- a/sm1
 	+++ /dev/null
 	@@ -1 +0,0 @@
 	-sm1
 	Submodule sm1 0000000...$head4 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 rm -rf sm1 &&
 git checkout-index sm1
 test_expect_success 'typechanged submodule(submodule->blob)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head4...0000000 (submodule deleted)
 	diff --git a/sm1 b/sm1
 	new file mode 100644
 	index 0000000..$head5
 	--- /dev/null
 	+++ b/sm1
 	@@ -0,0 +1 @@
 	+sm1
 	EOF
 	test_cmp expected actual
 '

 rm -f sm1 &&
 test_create_repo sm1 &&
 head6=$(add_file sm1 foo6 foo7)
 fullhead6=$(cd sm1; git rev-parse --verify HEAD)
 test_expect_success 'nonexistent commit' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head4...$head6 (commits not present)
 	EOF
 	test_cmp expected actual
 '

 commit_file
 test_expect_success 'typechanged submodule(blob->submodule)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	diff --git a/sm1 b/sm1
 	deleted file mode 100644
 	index $head5..0000000
 	--- a/sm1
 	+++ /dev/null
 	@@ -1 +0,0 @@
 	-sm1
 	Submodule sm1 0000000...$head6 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 commit_file sm1 &&
 test_expect_success 'submodule is up to date' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'submodule contains untracked content' '
 	echo new > sm1/new-file &&
 	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains untracked content
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'submodule contains untracked content (untracked ignored)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'submodule contains untracked content (dirty ignored)' '
 	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'submodule contains untracked content (all ignored)' '
 	git diff-index -p --ignore-submodules=all --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'submodule contains untracked and modified content' '
 	echo new > sm1/foo6 &&
 	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains untracked content
 	Submodule sm1 contains modified content
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'submodule contains untracked and modified content (untracked ignored)' '
 	echo new > sm1/foo6 &&
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains modified content
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'submodule contains untracked and modified content (dirty ignored)' '
 	echo new > sm1/foo6 &&
 	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'submodule contains untracked and modified content (all ignored)' '
 	echo new > sm1/foo6 &&
 	git diff-index -p --ignore-submodules --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'submodule contains modified content' '
 	rm -f sm1/new-file &&
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains modified content
 	EOF
 	test_cmp expected actual
 '

 (cd sm1; git commit -mchange foo6 >/dev/null) &&
 head8=$(cd sm1; git rev-parse --short --verify HEAD) &&
 test_expect_success 'submodule is modified' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked content' '
 	echo new > sm1/new-file &&
 	git diff-index -p  --ignore-submodules=none --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains untracked content
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked content (untracked ignored)' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked content (dirty ignored)' '
 	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked content (all ignored)' '
 	git diff-index -p --ignore-submodules=all --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'modified submodule contains untracked and modified content' '
 	echo modification >> sm1/foo6 &&
 	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains untracked content
 	Submodule sm1 contains modified content
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked and modified content (untracked ignored)' '
 	echo modification >> sm1/foo6 &&
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains modified content
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked and modified content (dirty ignored)' '
 	echo modification >> sm1/foo6 &&
 	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'modified submodule contains untracked and modified content (all ignored)' '
 	echo modification >> sm1/foo6 &&
 	git diff-index -p --ignore-submodules --submodule=log HEAD >actual &&
 	test_must_be_empty actual
 '

 test_expect_success 'modified submodule contains modified content' '
 	rm -f sm1/new-file &&
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 contains modified content
 	Submodule sm1 $head6..$head8:
 	  > change
 	EOF
 	test_cmp expected actual
 '

 rm -rf sm1
 test_expect_success 'deleted submodule' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6...0000000 (submodule deleted)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'create second submodule' '
 	test_create_repo sm2 &&
 	head7=$(add_file sm2 foo8 foo9) &&
 	git add sm2
 '

 test_expect_success 'multiple submodules' '
 	git diff-index -p --submodule=log HEAD >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6...0000000 (submodule deleted)
 	Submodule sm2 0000000...$head7 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'path filter' '
 	git diff-index -p --submodule=log HEAD sm2 >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm2 0000000...$head7 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 commit_file sm2
 test_expect_success 'given commit' '
 	git diff-index -p --submodule=log HEAD^ >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6...0000000 (submodule deleted)
 	Submodule sm2 0000000...$head7 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'given commit --submodule' '
 	git diff-index -p --submodule HEAD^ >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6...0000000 (submodule deleted)
 	Submodule sm2 0000000...$head7 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 fullhead7=$(cd sm2; git rev-parse --verify HEAD)

 test_expect_success 'given commit --submodule=short' '
 	git diff-index -p --submodule=short HEAD^ >actual &&
 	cat >expected <<-EOF &&
 	diff --git a/sm1 b/sm1
 	deleted file mode 160000
 	index $head6..0000000
 	--- a/sm1
 	+++ /dev/null
 	@@ -1 +0,0 @@
 	-Subproject commit $fullhead6
 	diff --git a/sm2 b/sm2
 	new file mode 160000
 	index 0000000..$head7
 	--- /dev/null
 	+++ b/sm2
 	@@ -0,0 +1 @@
 	+Subproject commit $fullhead7
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'setup .git file for sm2' '
 	(cd sm2 &&
 	 REAL="$(pwd)/../.real" &&
 	 mv .git "$REAL" &&
 	 echo "gitdir: $REAL" >.git)
 '

 test_expect_success 'diff --submodule with .git file' '
 	git diff --submodule HEAD^ >actual &&
 	cat >expected <<-EOF &&
 	Submodule sm1 $head6...0000000 (submodule deleted)
 	Submodule sm2 0000000...$head7 (new submodule)
 	EOF
 	test_cmp expected actual
 '

 test_expect_success 'diff --submodule with objects referenced by alternates' '
 	mkdir sub_alt &&
 	(cd sub_alt &&
 		git init &&
 		echo a >a &&
 		git add a &&
 		git commit -m a
 	) &&
 	mkdir super &&
 	(cd super &&
 		git clone -s ../sub_alt sub &&
 		git init &&
 		git add sub &&
 		git commit -m "sub a"
 	) &&
 	(cd sub_alt &&
 		sha1_before=$(git rev-parse --short HEAD) &&
 		echo b >b &&
 		git add b &&
 		git commit -m b &&
 		sha1_after=$(git rev-parse --short HEAD) &&
 		{
 			echo "Submodule sub $sha1_before..$sha1_after:" &&
 			echo "  > b"
 		} >../expected
 	) &&
 	(cd super &&
 		(cd sub &&
 			git fetch &&
 			git checkout origin/main
 		) &&
 		git diff --submodule > ../actual
 	) &&
 	test_cmp expected actual
 '

 test_done
	#!/bin/sh
	#
	# Copyright (c) 2009 Jens Lehmann, based on t7401 by Ping Yin
	# Copyright (c) 2011 Alexey Shumkin (+ non-UTF-8 commit encoding tests)
	#

	test_description='Support for verbose submodule differences in git diff

	This test tries to verify the sanity of the --submodule option of git diff.
	'

	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

	. ./test-lib.sh

	# Test non-UTF-8 encoding in case iconv is available.
	if test_have_prereq ICONV
	then
	test_encoding="ISO8859-1"
	# String "added" in German (translated with Google Translate), encoded in UTF-8,
	# used in sample commit log messages in add_file() function below.
	added=$(printf "hinzugef\303\274gt")
	else
	test_encoding="UTF-8"
	added="added"
	fi

	add_file () {
	(
	cd "$1" &&
	shift &&
	for name
	do
	echo "$name" >"$name" &&
	git add "$name" &&
	test_tick &&
	# "git commit -m" would break MinGW, as Windows refuse to pass
	# $test_encoding encoded parameter to git.
	echo "Add $name ($added $name)" \| iconv -f utf-8 -t $test_encoding \|
	git -c "i18n.commitEncoding=$test_encoding" commit -F -
	done >/dev/null &&
	git rev-parse --short --verify HEAD
	)
	}
	commit_file () {
	test_tick &&
	git commit "$@" -m "Commit $*" >/dev/null
	}

	test_create_repo sm1 &&
	add_file . foo >/dev/null

	head1=$(add_file sm1 foo1 foo2)
	fullhead1=$(cd sm1; git rev-parse --verify HEAD)

	test_expect_success 'added submodule' '
	git add sm1 &&
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 0000000...$head1 (new submodule)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'added submodule, set diff.submodule' '
	git config diff.submodule log &&
	git add sm1 &&
	git diff --cached >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 0000000...$head1 (new submodule)
	EOF
	git config --unset diff.submodule &&
	test_cmp expected actual
	'

	test_expect_success '--submodule=short overrides diff.submodule' '
	test_config diff.submodule log &&
	git add sm1 &&
	git diff --submodule=short --cached >actual &&
	cat >expected <<-EOF &&
	diff --git a/sm1 b/sm1
	new file mode 160000
	index 0000000..$head1
	--- /dev/null
	+++ b/sm1
	@@ -0,0 +1 @@
	+Subproject commit $fullhead1
	EOF
	test_cmp expected actual
	'

	test_expect_success 'diff.submodule does not affect plumbing' '
	test_config diff.submodule log &&
	git diff-index -p HEAD >actual &&
	cat >expected <<-EOF &&
	diff --git a/sm1 b/sm1
	new file mode 160000
	index 0000000..$head1
	--- /dev/null
	+++ b/sm1
	@@ -0,0 +1 @@
	+Subproject commit $fullhead1
	EOF
	test_cmp expected actual
	'

	commit_file sm1 &&
	head2=$(add_file sm1 foo3)

	test_expect_success 'modified submodule(forward)' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head1..$head2:
	> Add foo3 ($added foo3)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule(forward)' '
	git diff --submodule=log >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head1..$head2:
	> Add foo3 ($added foo3)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule(forward) --submodule' '
	git diff --submodule >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head1..$head2:
	> Add foo3 ($added foo3)
	EOF
	test_cmp expected actual
	'

	fullhead2=$(cd sm1; git rev-parse --verify HEAD)
	test_expect_success 'modified submodule(forward) --submodule=short' '
	git diff --submodule=short >actual &&
	cat >expected <<-EOF &&
	diff --git a/sm1 b/sm1
	index $head1..$head2 160000
	--- a/sm1
	+++ b/sm1
	@@ -1 +1 @@
	-Subproject commit $fullhead1
	+Subproject commit $fullhead2
	EOF
	test_cmp expected actual
	'

	commit_file sm1 &&
	head3=$(
	cd sm1 &&
	git reset --hard HEAD~2 >/dev/null &&
	git rev-parse --short --verify HEAD
	)

	test_expect_success 'modified submodule(backward)' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head2..$head3 (rewind):
	< Add foo3 ($added foo3)
	< Add foo2 ($added foo2)
	EOF
	test_cmp expected actual
	'

	head4=$(add_file sm1 foo4 foo5)
	test_expect_success 'modified submodule(backward and forward)' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head2...$head4:
	> Add foo5 ($added foo5)
	> Add foo4 ($added foo4)
	< Add foo3 ($added foo3)
	< Add foo2 ($added foo2)
	EOF
	test_cmp expected actual
	'

	commit_file sm1 &&
	mv sm1 sm1-bak &&
	echo sm1 >sm1 &&
	head5=$(git hash-object sm1 \| cut -c1-7) &&
	git add sm1 &&
	rm -f sm1 &&
	mv sm1-bak sm1

	test_expect_success 'typechanged submodule(submodule->blob), --cached' '
	git diff --submodule=log --cached >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head4...0000000 (submodule deleted)
	diff --git a/sm1 b/sm1
	new file mode 100644
	index 0000000..$head5
	--- /dev/null
	+++ b/sm1
	@@ -0,0 +1 @@
	+sm1
	EOF
	test_cmp expected actual
	'

	test_expect_success 'typechanged submodule(submodule->blob)' '
	git diff --submodule=log >actual &&
	cat >expected <<-EOF &&
	diff --git a/sm1 b/sm1
	deleted file mode 100644
	index $head5..0000000
	--- a/sm1
	+++ /dev/null
	@@ -1 +0,0 @@
	-sm1
	Submodule sm1 0000000...$head4 (new submodule)
	EOF
	test_cmp expected actual
	'

	rm -rf sm1 &&
	git checkout-index sm1
	test_expect_success 'typechanged submodule(submodule->blob)' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head4...0000000 (submodule deleted)
	diff --git a/sm1 b/sm1
	new file mode 100644
	index 0000000..$head5
	--- /dev/null
	+++ b/sm1
	@@ -0,0 +1 @@
	+sm1
	EOF
	test_cmp expected actual
	'

	rm -f sm1 &&
	test_create_repo sm1 &&
	head6=$(add_file sm1 foo6 foo7)
	fullhead6=$(cd sm1; git rev-parse --verify HEAD)
	test_expect_success 'nonexistent commit' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head4...$head6 (commits not present)
	EOF
	test_cmp expected actual
	'

	commit_file
	test_expect_success 'typechanged submodule(blob->submodule)' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	diff --git a/sm1 b/sm1
	deleted file mode 100644
	index $head5..0000000
	--- a/sm1
	+++ /dev/null
	@@ -1 +0,0 @@
	-sm1
	Submodule sm1 0000000...$head6 (new submodule)
	EOF
	test_cmp expected actual
	'

	commit_file sm1 &&
	test_expect_success 'submodule is up to date' '
	git diff-index -p --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'submodule contains untracked content' '
	echo new > sm1/new-file &&
	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains untracked content
	EOF
	test_cmp expected actual
	'

	test_expect_success 'submodule contains untracked content (untracked ignored)' '
	git diff-index -p --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'submodule contains untracked content (dirty ignored)' '
	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'submodule contains untracked content (all ignored)' '
	git diff-index -p --ignore-submodules=all --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'submodule contains untracked and modified content' '
	echo new > sm1/foo6 &&
	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains untracked content
	Submodule sm1 contains modified content
	EOF
	test_cmp expected actual
	'

	test_expect_success 'submodule contains untracked and modified content (untracked ignored)' '
	echo new > sm1/foo6 &&
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains modified content
	EOF
	test_cmp expected actual
	'

	test_expect_success 'submodule contains untracked and modified content (dirty ignored)' '
	echo new > sm1/foo6 &&
	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'submodule contains untracked and modified content (all ignored)' '
	echo new > sm1/foo6 &&
	git diff-index -p --ignore-submodules --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'submodule contains modified content' '
	rm -f sm1/new-file &&
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains modified content
	EOF
	test_cmp expected actual
	'

	(cd sm1; git commit -mchange foo6 >/dev/null) &&
	head8=$(cd sm1; git rev-parse --short --verify HEAD) &&
	test_expect_success 'submodule is modified' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked content' '
	echo new > sm1/new-file &&
	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains untracked content
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked content (untracked ignored)' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked content (dirty ignored)' '
	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked content (all ignored)' '
	git diff-index -p --ignore-submodules=all --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'modified submodule contains untracked and modified content' '
	echo modification >> sm1/foo6 &&
	git diff-index -p --ignore-submodules=none --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains untracked content
	Submodule sm1 contains modified content
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked and modified content (untracked ignored)' '
	echo modification >> sm1/foo6 &&
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains modified content
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked and modified content (dirty ignored)' '
	echo modification >> sm1/foo6 &&
	git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	test_expect_success 'modified submodule contains untracked and modified content (all ignored)' '
	echo modification >> sm1/foo6 &&
	git diff-index -p --ignore-submodules --submodule=log HEAD >actual &&
	test_must_be_empty actual
	'

	test_expect_success 'modified submodule contains modified content' '
	rm -f sm1/new-file &&
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 contains modified content
	Submodule sm1 $head6..$head8:
	> change
	EOF
	test_cmp expected actual
	'

	rm -rf sm1
	test_expect_success 'deleted submodule' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6...0000000 (submodule deleted)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'create second submodule' '
	test_create_repo sm2 &&
	head7=$(add_file sm2 foo8 foo9) &&
	git add sm2
	'

	test_expect_success 'multiple submodules' '
	git diff-index -p --submodule=log HEAD >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6...0000000 (submodule deleted)
	Submodule sm2 0000000...$head7 (new submodule)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'path filter' '
	git diff-index -p --submodule=log HEAD sm2 >actual &&
	cat >expected <<-EOF &&
	Submodule sm2 0000000...$head7 (new submodule)
	EOF
	test_cmp expected actual
	'

	commit_file sm2
	test_expect_success 'given commit' '
	git diff-index -p --submodule=log HEAD^ >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6...0000000 (submodule deleted)
	Submodule sm2 0000000...$head7 (new submodule)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'given commit --submodule' '
	git diff-index -p --submodule HEAD^ >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6...0000000 (submodule deleted)
	Submodule sm2 0000000...$head7 (new submodule)
	EOF
	test_cmp expected actual
	'

	fullhead7=$(cd sm2; git rev-parse --verify HEAD)

	test_expect_success 'given commit --submodule=short' '
	git diff-index -p --submodule=short HEAD^ >actual &&
	cat >expected <<-EOF &&
	diff --git a/sm1 b/sm1
	deleted file mode 160000
	index $head6..0000000
	--- a/sm1
	+++ /dev/null
	@@ -1 +0,0 @@
	-Subproject commit $fullhead6
	diff --git a/sm2 b/sm2
	new file mode 160000
	index 0000000..$head7
	--- /dev/null
	+++ b/sm2
	@@ -0,0 +1 @@
	+Subproject commit $fullhead7
	EOF
	test_cmp expected actual
	'

	test_expect_success 'setup .git file for sm2' '
	(cd sm2 &&
	REAL="$(pwd)/../.real" &&
	mv .git "$REAL" &&
	echo "gitdir: $REAL" >.git)
	'

	test_expect_success 'diff --submodule with .git file' '
	git diff --submodule HEAD^ >actual &&
	cat >expected <<-EOF &&
	Submodule sm1 $head6...0000000 (submodule deleted)
	Submodule sm2 0000000...$head7 (new submodule)
	EOF
	test_cmp expected actual
	'

	test_expect_success 'diff --submodule with objects referenced by alternates' '
	mkdir sub_alt &&
	(cd sub_alt &&
	git init &&
	echo a >a &&
	git add a &&
	git commit -m a
	) &&
	mkdir super &&
	(cd super &&
	git clone -s ../sub_alt sub &&
	git init &&
	git add sub &&
	git commit -m "sub a"
	) &&
	(cd sub_alt &&
	sha1_before=$(git rev-parse --short HEAD) &&
	echo b >b &&
	git add b &&
	git commit -m b &&
	sha1_after=$(git rev-parse --short HEAD) &&
	{
	echo "Submodule sub $sha1_before..$sha1_after:" &&
	echo " > b"
	} >../expected
	) &&
	(cd super &&
	(cd sub &&
	git fetch &&
	git checkout origin/main
	) &&
	git diff --submodule > ../actual
	) &&
	test_cmp expected actual
	'

	test_done