#!/bin/sh

global test_description := ''diff --no-index''

source ./test-lib.sh

test_expect_success 'setup' '
	mkdir a &&
	mkdir b &&
	echo 1 >a/1 &&
	echo 2 >a/2 &&
	git init repo &&
	echo 1 >repo/a &&
	mkdir -p non/git &&
	echo 1 >non/git/a &&
	echo 1 >non/git/b
'

test_expect_success 'git diff --no-index directories' '
	test_expect_code 1 git diff --no-index a b >cnt &&
	test_line_count = 14 cnt
'

test_expect_success 'git diff --no-index relative path outside repo' '
	(
		cd repo &&
		test_expect_code 0 git diff --no-index a ../non/git/a &&
		test_expect_code 0 git diff --no-index ../non/git/a ../non/git/b
	)
'

test_expect_success 'git diff --no-index with broken index' '
	(
		cd repo &&
		echo broken >.git/index &&
		git diff --no-index a ../non/git/a
	)
'

test_expect_success 'git diff outside repo with broken index' '
	(
		cd repo &&
		git diff ../non/git/a ../non/git/b
	)
'

test_expect_success 'git diff --no-index executed outside repo gives correct error message' '
	(
		GIT_CEILING_DIRECTORIES=$TRASH_DIRECTORY/non &&
		export GIT_CEILING_DIRECTORIES &&
		cd non/git &&
		test_must_fail git diff --no-index a 2>actual.err &&
		echo "usage: git diff --no-index <path> <path>" >expect.err &&
		test_cmp expect.err actual.err
	)
'

test_expect_success 'diff D F and diff F D' '
	(
		cd repo &&
		echo in-repo >a &&
		echo non-repo >../non/git/a &&
		mkdir sub &&
		echo sub-repo >sub/a &&

		test_must_fail git diff --no-index sub/a ../non/git/a >expect &&
		test_must_fail git diff --no-index sub/a ../non/git/ >actual &&
		test_cmp expect actual &&

		test_must_fail git diff --no-index a ../non/git/a >expect &&
		test_must_fail git diff --no-index a ../non/git/ >actual &&
		test_cmp expect actual &&

		test_must_fail git diff --no-index ../non/git/a a >expect &&
		test_must_fail git diff --no-index ../non/git a >actual &&
		test_cmp expect actual
	)
'

test_expect_success 'turning a file into a directory' '
	(
		cd non/git &&
		mkdir d e e/sub &&
		echo 1 >d/sub &&
		echo 2 >e/sub/file &&
		printf "D\td/sub\nA\te/sub/file\n" >expect &&
		test_must_fail git diff --no-index --name-status d e >actual &&
		test_cmp expect actual
	)
'

test_expect_success 'diff from repo subdir shows real paths (explicit)' '
	echo "diff --git a/../../non/git/a b/../../non/git/b" >expect &&
	test_expect_code 1 \
		git -C repo/sub \
		diff --no-index ../../non/git/a ../../non/git/b >actual &&
	head -n 1 <actual >actual.head &&
	test_cmp expect actual.head
'

test_expect_success 'diff from repo subdir shows real paths (implicit)' '
	echo "diff --git a/../../non/git/a b/../../non/git/b" >expect &&
	test_expect_code 1 \
		git -C repo/sub \
		diff ../../non/git/a ../../non/git/b >actual &&
	head -n 1 <actual >actual.head &&
	test_cmp expect actual.head
'

test_expect_success 'diff --no-index from repo subdir respects config (explicit)' '
	echo "diff --git ../../non/git/a ../../non/git/b" >expect &&
	test_config -C repo diff.noprefix true &&
	test_expect_code 1 \
		git -C repo/sub \
		diff --no-index ../../non/git/a ../../non/git/b >actual &&
	head -n 1 <actual >actual.head &&
	test_cmp expect actual.head
'

test_expect_success 'diff --no-index from repo subdir respects config (implicit)' '
	echo "diff --git ../../non/git/a ../../non/git/b" >expect &&
	test_config -C repo diff.noprefix true &&
	test_expect_code 1 \
		git -C repo/sub \
		diff ../../non/git/a ../../non/git/b >actual &&
	head -n 1 <actual >actual.head &&
	test_cmp expect actual.head
'

test_done
(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"diff --no-index">)}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(test_expect_success)} {(SQ <setup>)} 
      {
        (SQ <"\n"> <"\tmkdir a &&\n"> <"\tmkdir b &&\n"> <"\techo 1 >a/1 &&\n"> <"\techo 2 >a/2 &&\n"> 
          <"\tgit init repo &&\n"> <"\techo 1 >repo/a &&\n"> <"\tmkdir -p non/git &&\n"> <"\techo 1 >non/git/a &&\n"> 
          <"\techo 1 >non/git/b\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"git diff --no-index directories">)} 
      {
        (SQ <"\n"> <"\ttest_expect_code 1 git diff --no-index a b >cnt &&\n"> 
          <"\ttest_line_count = 14 cnt\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"git diff --no-index relative path outside repo">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\t\tcd repo &&\n"> 
          <"\t\ttest_expect_code 0 git diff --no-index a ../non/git/a &&\n"> <"\t\ttest_expect_code 0 git diff --no-index ../non/git/a ../non/git/b\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"git diff --no-index with broken index">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\t\tcd repo &&\n"> <"\t\techo broken >.git/index &&\n"> 
          <"\t\tgit diff --no-index a ../non/git/a\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"git diff outside repo with broken index">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\t\tcd repo &&\n"> <"\t\tgit diff ../non/git/a ../non/git/b\n"> <"\t)\n">)
      }
    )
    (C {(test_expect_success)} 
      {(SQ <"git diff --no-index executed outside repo gives correct error message">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\t\tGIT_CEILING_DIRECTORIES=$TRASH_DIRECTORY/non &&\n"> 
          <"\t\texport GIT_CEILING_DIRECTORIES &&\n"> <"\t\tcd non/git &&\n"> <"\t\ttest_must_fail git diff --no-index a 2>actual.err &&\n"> 
          <"\t\techo \"usage: git diff --no-index <path> <path>\" >expect.err &&\n"> <"\t\ttest_cmp expect.err actual.err\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"diff D F and diff F D">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\t\tcd repo &&\n"> <"\t\techo in-repo >a &&\n"> 
          <"\t\techo non-repo >../non/git/a &&\n"> <"\t\tmkdir sub &&\n"> <"\t\techo sub-repo >sub/a &&\n"> <"\n"> 
          <"\t\ttest_must_fail git diff --no-index sub/a ../non/git/a >expect &&\n"> <"\t\ttest_must_fail git diff --no-index sub/a ../non/git/ >actual &&\n"> 
          <"\t\ttest_cmp expect actual &&\n"> <"\n"> <"\t\ttest_must_fail git diff --no-index a ../non/git/a >expect &&\n"> 
          <"\t\ttest_must_fail git diff --no-index a ../non/git/ >actual &&\n"> <"\t\ttest_cmp expect actual &&\n"> <"\n"> 
          <"\t\ttest_must_fail git diff --no-index ../non/git/a a >expect &&\n"> <"\t\ttest_must_fail git diff --no-index ../non/git a >actual &&\n"> <"\t\ttest_cmp expect actual\n"> 
          <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"turning a file into a directory">)} 
      {
        (SQ <"\n"> <"\t(\n"> <"\t\tcd non/git &&\n"> <"\t\tmkdir d e e/sub &&\n"> 
          <"\t\techo 1 >d/sub &&\n"> <"\t\techo 2 >e/sub/file &&\n"> <"\t\tprintf \"D\\td/sub\\nA\\te/sub/file\\n\" >expect &&\n"> 
          <"\t\ttest_must_fail git diff --no-index --name-status d e >actual &&\n"> <"\t\ttest_cmp expect actual\n"> <"\t)\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"diff from repo subdir shows real paths (explicit)">)} 
      {
        (SQ <"\n"> <"\techo \"diff --git a/../../non/git/a b/../../non/git/b\" >expect &&\n"> 
          <"\ttest_expect_code 1 \\\n"> <"\t\tgit -C repo/sub \\\n"> <"\t\tdiff --no-index ../../non/git/a ../../non/git/b >actual &&\n"> 
          <"\thead -n 1 <actual >actual.head &&\n"> <"\ttest_cmp expect actual.head\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"diff from repo subdir shows real paths (implicit)">)} 
      {
        (SQ <"\n"> <"\techo \"diff --git a/../../non/git/a b/../../non/git/b\" >expect &&\n"> 
          <"\ttest_expect_code 1 \\\n"> <"\t\tgit -C repo/sub \\\n"> <"\t\tdiff ../../non/git/a ../../non/git/b >actual &&\n"> 
          <"\thead -n 1 <actual >actual.head &&\n"> <"\ttest_cmp expect actual.head\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"diff --no-index from repo subdir respects config (explicit)">)} 
      {
        (SQ <"\n"> <"\techo \"diff --git ../../non/git/a ../../non/git/b\" >expect &&\n"> 
          <"\ttest_config -C repo diff.noprefix true &&\n"> <"\ttest_expect_code 1 \\\n"> <"\t\tgit -C repo/sub \\\n"> 
          <"\t\tdiff --no-index ../../non/git/a ../../non/git/b >actual &&\n"> <"\thead -n 1 <actual >actual.head &&\n"> <"\ttest_cmp expect actual.head\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"diff --no-index from repo subdir respects config (implicit)">)} 
      {
        (SQ <"\n"> <"\techo \"diff --git ../../non/git/a ../../non/git/b\" >expect &&\n"> 
          <"\ttest_config -C repo diff.noprefix true &&\n"> <"\ttest_expect_code 1 \\\n"> <"\t\tgit -C repo/sub \\\n"> 
          <"\t\tdiff ../../non/git/a ../../non/git/b >actual &&\n"> <"\thead -n 1 <actual >actual.head &&\n"> <"\ttest_cmp expect actual.head\n">
        )
      }
    )
    (C {(test_done)})
  ]
)