ls-files tests: filter .gitconfig from --others output

The global `safe.bareRepository=all` setting in test-lib.sh is
written to `$HOME/.gitconfig`, which unfortunately lives inside the
test repository's working tree. The `.git/info/exclude` entry added
alongside it handles most commands, but `git ls-files --others`
without `--exclude-standard` does not consult `info/exclude` at
all, so the file appears in the output.

Ideally, each test that accesses a bare repository would simply
specify `--git-dir` or `GIT_DIR` explicitly, which would require no
global config and produce no side effects in the working tree. As
that approach was not taken, filter `.gitconfig` from the output
before comparing against expected results. In t7104, the test
already uses `--exclude-standard`, so it suffices to switch from
the bare `git ls-files -o` to `git ls-files -o --exclude-standard`
which respects the `info/exclude` entry; the other tests
deliberately omit `--exclude-standard` because their purpose is to
verify unfiltered `--others` output.

Assisted-by: Claude Opus 4.6
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3000-ls-files-others.sh

@@ -53,16 +53,19 @@ test_expect_success 'setup: expected output' '
 
 test_expect_success 'ls-files --others' '
 	git ls-files --others >output &&
+	test_filter_gitconfig output &&
 	test_cmp expected1 output
 '
 
 test_expect_success 'ls-files --others --directory' '
 	git ls-files --others --directory >output &&
+	test_filter_gitconfig output &&
 	test_cmp expected2 output
 '
 
 test_expect_success '--no-empty-directory hides empty directory' '
 	git ls-files --others --directory --no-empty-directory >output &&
+	test_filter_gitconfig output &&
 	test_cmp expected3 output
 '
 
@@ -70,6 +73,7 @@ test_expect_success 'ls-files --others handles non-submodule .git' '
 	mkdir not-a-submodule &&
 	echo foo >not-a-submodule/.git &&
 	git ls-files -o >output &&
+	test_filter_gitconfig output &&
 	test_cmp expected1 output
 '
 

t/t3001-ls-files-others-exclude.sh

@@ -72,6 +72,7 @@ test_expect_success 'git ls-files --others with various exclude options.' '
        --exclude-per-directory=.gitignore \
        --exclude-from=.git/ignore \
 	>output &&
+	test_filter_gitconfig output &&
 	test_cmp expect output
 '
 
@@ -84,6 +85,7 @@ test_expect_success 'git ls-files --others with \r\n line endings.' '
        --exclude-per-directory=.gitignore \
        --exclude-from=.git/ignore \
 	>output &&
+	test_filter_gitconfig output &&
 	test_cmp expect output
 '
 
@@ -99,6 +101,7 @@ test_expect_success 'git ls-files --others with various exclude options.' '
        --exclude-per-directory=.gitignore \
        --exclude-from=.git/ignore \
 	>output &&
+	test_filter_gitconfig output &&
 	test_cmp expect output
 '
 

t/t3002-ls-files-dashpath.sh

@@ -24,6 +24,7 @@ test_expect_success 'setup' '
 test_expect_success 'git ls-files without path restriction.' '
 	test_when_finished "rm -f expect" &&
 	git ls-files --others >output &&
+	test_filter_gitconfig output &&
 	cat >expect <<-\EOF &&
 	--
 	-foo
@@ -63,6 +64,7 @@ test_expect_success 'git ls-files with path restriction with -- --.' '
 test_expect_success 'git ls-files with no path restriction.' '
 	test_when_finished "rm -f expect" &&
 	git ls-files --others -- >output &&
+	test_filter_gitconfig output &&
 	cat >expect <<-\EOF &&
 	--
 	-foo

t/t3009-ls-files-others-nonsubmodule.sh

@@ -36,6 +36,7 @@ test_expect_success 'setup: directories' '
 
 test_expect_success 'ls-files --others handles untracked git repositories' '
 	git ls-files -o >output &&
+	test_filter_gitconfig output &&
 	cat >expect <<-EOF &&
 	nonrepo-untracked-file/untracked
 	output

t/t3011-common-prefixes-and-directory-traversal.sh

@@ -26,7 +26,7 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'git ls-files -o shows the right entries' '
-	cat <<-EOF >expect &&
+	cat >expect <<-EOF &&
 	.gitignore
 	actual
 	an_ignored_dir/ignored
@@ -39,6 +39,7 @@ test_expect_success 'git ls-files -o shows the right entries' '
 	untracked_repo/
 	EOF
 	git ls-files -o >actual &&
+	test_filter_gitconfig actual &&
 	test_cmp expect actual
 '
 

t/t7104-reset-hard.sh

@@ -21,7 +21,7 @@ test_expect_success setup '
 	rm -f hello &&
 	mkdir -p hello &&
 	>hello/world &&
-	test "$(git ls-files -o)" = hello/world
+	test "$(git ls-files -o --exclude-standard)" = hello/world
 
 '
 

t/test-lib-functions.sh

@@ -2069,3 +2069,11 @@ test_trailing_hash () {
 test_redact_non_printables () {
     tr -d "\n\r" | tr "[\001-\040][\177-\377]" "."
 }
+
+# Remove .gitconfig entries from a file in place.  test-lib.sh may
+# create $HOME/.gitconfig (e.g. to set safe.bareRepository) which
+# can appear in ls-files or status output.
+test_filter_gitconfig () {
+	sed "/\\.gitconfig/d" "$1" >"$1.filtered" &&
+	mv "$1.filtered" "$1"
+}