git/t/t3011-common-prefixes-and-directory-traversal.sh
Elijah Newren 777b420347 dir: synchronize treat_leading_path() and read_directory_recursive()
Our optimization to avoid calling into read_directory_recursive() when
all pathspecs have a common leading directory mean that we need to match
the logic that read_directory_recursive() would use if we had just
called it from the root.  Since it does more than call treat_path() we
need to copy that same logic.

Alternatively, we could try to change treat_path to return path_recurse
for an untracked directory under the given special circumstances that
this logic checks for, but a simple switch results in many test failures
such as 'git clean -d' not wiping out untracked but empty directories.
To work around that, we'd need the caller of treat_path to check for
path_recurse and sometimes special case it into path_untracked.  In
other words, we'd still have extra logic in both places.

Needing to duplicate logic like this means it is guaranteed someone will
eventually need to make further changes and forget to update both
locations.  It is tempting to just nuke the leading_directory special
casing to avoid such bugs and simplify the code, but unpack_trees'
verify_clean_subdirectory() also calls read_directory() and does so with
a non-empty leading path, so I'm hesitant to try to restructure further.
Add obnoxious warnings to treat_leading_path() and
read_directory_recursive() to try to warn people of such problems.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-12-19 13:45:47 -08:00

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#!/bin/sh
test_description='directory traversal handling, especially with common prefixes'
. ./test-lib.sh
test_expect_success 'setup' '
test_commit hello &&
>empty &&
mkdir untracked_dir &&
>untracked_dir/empty &&
git init untracked_repo &&
>untracked_repo/empty &&
cat <<-EOF >.gitignore &&
ignored
an_ignored_dir/
EOF
mkdir an_ignored_dir &&
mkdir an_untracked_dir &&
>an_ignored_dir/ignored &&
>an_ignored_dir/untracked &&
>an_untracked_dir/ignored &&
>an_untracked_dir/untracked
'
test_expect_success 'git ls-files -o shows the right entries' '
cat <<-EOF >expect &&
.gitignore
actual
an_ignored_dir/ignored
an_ignored_dir/untracked
an_untracked_dir/ignored
an_untracked_dir/untracked
empty
expect
untracked_dir/empty
untracked_repo/
EOF
git ls-files -o >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o --exclude-standard shows the right entries' '
cat <<-EOF >expect &&
.gitignore
actual
an_untracked_dir/untracked
empty
expect
untracked_dir/empty
untracked_repo/
EOF
git ls-files -o --exclude-standard >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o untracked_dir recurses' '
echo untracked_dir/empty >expect &&
git ls-files -o untracked_dir >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o untracked_dir/ recurses' '
echo untracked_dir/empty >expect &&
git ls-files -o untracked_dir/ >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o --directory untracked_dir does not recurse' '
echo untracked_dir/ >expect &&
git ls-files -o --directory untracked_dir >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o --directory untracked_dir/ does not recurse' '
echo untracked_dir/ >expect &&
git ls-files -o --directory untracked_dir/ >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o untracked_repo does not recurse' '
echo untracked_repo/ >expect &&
git ls-files -o untracked_repo >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o untracked_repo/ does not recurse' '
echo untracked_repo/ >expect &&
git ls-files -o untracked_repo/ >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o untracked_dir untracked_repo recurses into untracked_dir only' '
cat <<-EOF >expect &&
untracked_dir/empty
untracked_repo/
EOF
git ls-files -o untracked_dir untracked_repo >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o untracked_dir/ untracked_repo/ recurses into untracked_dir only' '
cat <<-EOF >expect &&
untracked_dir/empty
untracked_repo/
EOF
git ls-files -o untracked_dir/ untracked_repo/ >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o --directory untracked_dir untracked_repo does not recurse' '
cat <<-EOF >expect &&
untracked_dir/
untracked_repo/
EOF
git ls-files -o --directory untracked_dir untracked_repo >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o --directory untracked_dir/ untracked_repo/ does not recurse' '
cat <<-EOF >expect &&
untracked_dir/
untracked_repo/
EOF
git ls-files -o --directory untracked_dir/ untracked_repo/ >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o .git shows nothing' '
git ls-files -o .git >actual &&
test_must_be_empty actual
'
test_expect_success 'git ls-files -o .git/ shows nothing' '
git ls-files -o .git/ >actual &&
test_must_be_empty actual
'
test_expect_success FUNNYNAMES 'git ls-files -o untracked_* recurses appropriately' '
mkdir "untracked_*" &&
>"untracked_*/empty" &&
cat <<-EOF >expect &&
untracked_*/empty
untracked_dir/empty
untracked_repo/
EOF
git ls-files -o "untracked_*" >actual &&
test_cmp expect actual
'
# It turns out fill_directory returns the right paths, but ls-files' post-call
# filtering in show_dir_entry() via calling dir_path_match() which ends up
# in git_fnmatch() has logic for PATHSPEC_ONESTAR that assumes the pathspec
# must match the full path; it doesn't check it for matching a leading
# directory.
test_expect_failure FUNNYNAMES 'git ls-files -o untracked_*/ recurses appropriately' '
cat <<-EOF >expect &&
untracked_*/empty
untracked_dir/empty
untracked_repo/
EOF
git ls-files -o "untracked_*/" >actual &&
test_cmp expect actual
'
test_expect_success FUNNYNAMES 'git ls-files -o --directory untracked_* does not recurse' '
cat <<-EOF >expect &&
untracked_*/
untracked_dir/
untracked_repo/
EOF
git ls-files -o --directory "untracked_*" >actual &&
test_cmp expect actual
'
test_expect_success FUNNYNAMES 'git ls-files -o --directory untracked_*/ does not recurse' '
cat <<-EOF >expect &&
untracked_*/
untracked_dir/
untracked_repo/
EOF
git ls-files -o --directory "untracked_*/" >actual &&
test_cmp expect actual
'
test_expect_success 'git ls-files -o consistent between one or two dirs' '
git ls-files -o --exclude-standard an_ignored_dir/ an_untracked_dir/ >tmp &&
! grep ^an_ignored_dir/ tmp >expect &&
git ls-files -o --exclude-standard an_ignored_dir/ >actual &&
test_cmp expect actual
'
# ls-files doesn't have a way to request showing both untracked and ignored
# files at the same time, so use `git status --ignored`
test_expect_success 'git status --ignored shows same files under dir with or without pathspec' '
cat <<-EOF >expect &&
?? an_untracked_dir/
!! an_untracked_dir/ignored
EOF
git status --porcelain --ignored >output &&
grep an_untracked_dir output >expect &&
git status --porcelain --ignored an_untracked_dir/ >actual &&
test_cmp expect actual
'
test_done