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git/t/t4053-diff-no-index.sh
Jeff King 287ab28bfa diff: reuse diff setup for --no-index case
When "--no-index" is in effect (or implied by the arguments), git-diff
jumps early to a special code path to perform that diff. This means we
miss out on some settings like enabling --ext-diff and --textconv by
default.

Let's jump to the no-index path _after_ we've done more setup on
rev.diffopt. Since some of the options don't affect us (e.g., items
related to the index), let's re-order the setup into two blocks (see the
in-code comments).

Note that we also need to stop re-initializing the diffopt struct in
diff_no_index(). This should not be necessary, as it will already have
been initialized by cmd_diff() (and there are no other callers). That in
turn lets us drop the "repository" argument from diff_no_index (which
never made much sense, since the whole point is that you don't need a
repository).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-02-24 07:08:34 -08:00

148 lines
3.9 KiB
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Executable file

#!/bin/sh
test_description='diff --no-index'
. ./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_expect_success 'diff --no-index from repo subdir with absolute paths' '
cat <<-EOF >expect &&
1 1 $(pwd)/non/git/{a => b}
EOF
test_expect_code 1 \
git -C repo/sub diff --numstat \
"$(pwd)/non/git/a" "$(pwd)/non/git/b" >actual &&
test_cmp expect actual
'
test_expect_success 'diff --no-index allows external diff' '
test_expect_code 1 \
env GIT_EXTERNAL_DIFF="echo external ;:" \
git diff --no-index non/git/a non/git/b >actual &&
echo external >expect &&
test_cmp expect actual
'
test_done