#!/bin/sh
#
# Copyright (c) 2009 Jens Lehmann, based on t7401 by Ping Yin
#

test_description='Support for verbose submodule differences in git diff

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

. ./test-lib.sh

add_file () {
	sm=$1
	shift
	owd=$(pwd)
	cd "$sm"
	for name; do
		echo "$name" > "$name" &&
		git add "$name" &&
		test_tick &&
		git commit -m "Add $name"
	done >/dev/null
	git rev-parse --verify HEAD | cut -c1-7
	cd "$owd"
}
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)

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

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

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

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

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

fullhead1=$(cd sm1; git rev-list --max-count=1 $head1)
fullhead2=$(cd sm1; git rev-list --max-count=1 $head2)
test_expect_success 'modified submodule(forward) --submodule=short' "
	git diff --submodule=short >actual &&
	diff actual - <<-EOF
diff --git a/sm1 b/sm1
index $head1..$head2 160000
--- a/sm1
+++ b/sm1
@@ -1 +1 @@
-Subproject commit $fullhead1
+Subproject commit $fullhead2
EOF
"

commit_file sm1 &&
cd sm1 &&
git reset --hard HEAD~2 >/dev/null &&
head3=$(git rev-parse --verify HEAD | cut -c1-7) &&
cd ..

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

head4=$(add_file sm1 foo4 foo5) &&
head4_full=$(GIT_DIR=sm1/.git git rev-parse --verify HEAD)
test_expect_success 'modified submodule(backward and forward)' "
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-EOF
Submodule sm1 $head2...$head4:
  > Add foo5
  > Add foo4
  < Add foo3
  < Add foo2
EOF
"

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 &&
	diff actual - <<-EOF
Submodule sm1 41fbea9...0000000 (submodule deleted)
diff --git a/sm1 b/sm1
new file mode 100644
index 0000000..9da5fb8
--- /dev/null
+++ b/sm1
@@ -0,0 +1 @@
+sm1
EOF
"

test_expect_success 'typechanged submodule(submodule->blob)' "
	git diff --submodule=log >actual &&
	diff actual - <<-EOF
diff --git a/sm1 b/sm1
deleted file mode 100644
index 9da5fb8..0000000
--- a/sm1
+++ /dev/null
@@ -1 +0,0 @@
-sm1
Submodule sm1 0000000...$head4 (new submodule)
EOF
"

rm -rf sm1 &&
git checkout-index sm1
test_expect_success 'typechanged submodule(submodule->blob)' "
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-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
"

rm -f sm1 &&
test_create_repo sm1 &&
head6=$(add_file sm1 foo6 foo7)
fullhead6=$(cd sm1; git rev-list --max-count=1 $head6)
test_expect_success 'nonexistent commit' "
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-EOF
Submodule sm1 $head4...$head6 (commits not present)
EOF
"

commit_file
test_expect_success 'typechanged submodule(blob->submodule)' "
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-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
"

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

test_expect_success 'submodule contains untracked content' "
	echo new > sm1/new-file &&
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-EOF
Submodule sm1 contains untracked content
EOF
"

test_expect_success 'submodule contains untracked and modifed content' "
	echo new > sm1/foo6 &&
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-EOF
Submodule sm1 contains untracked content
Submodule sm1 contains modified content
EOF
"

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

(cd sm1; git commit -mchange foo6 >/dev/null) &&
head8=$(cd sm1; git rev-parse --verify HEAD | cut -c1-7) &&
test_expect_success 'submodule is modified' "
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-EOF
Submodule sm1 $head6..$head8:
  > change
EOF
"

test_expect_success 'modified submodule contains untracked content' "
	echo new > sm1/new-file &&
	git diff-index -p --submodule=log HEAD >actual &&
	diff actual - <<-EOF
Submodule sm1 contains untracked content
Submodule sm1 $head6..$head8:
  > change
EOF
"

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

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

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

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 &&
	diff actual - <<-EOF
Submodule sm1 $head6...0000000 (submodule deleted)
Submodule sm2 0000000...$head7 (new submodule)
EOF
"

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

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

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

fullhead7=$(cd sm2; git rev-list --max-count=1 $head7)

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

test_done