Merge branch 'ps/tests-with-ref-files-backend'

Prepare existing tests on refs to work better with non-default
backends.

* ps/tests-with-ref-files-backend:
  t: mark tests regarding git-pack-refs(1) to be backend specific
  t5526: break test submodule differently
  t1419: mark test suite as files-backend specific
  t1302: make tests more robust with new extensions
  t1301: mark test for `core.sharedRepository` as reffiles specific
  t1300: make tests more robust with non-default ref backends

t/t1300-config.sh

@@ -1098,15 +1098,20 @@ test_expect_success SYMLINKS 'symlink to nonexistent configuration' '
 	test_must_fail git config --file=linktolinktonada --list
 '
 
-test_expect_success 'check split_cmdline return' "
-	git config alias.split-cmdline-fix 'echo \"' &&
+test_expect_success 'check split_cmdline return' '
+	test_when_finished "rm -rf repo" &&
+	git init repo &&
+	(
+		cd repo &&
+		git config alias.split-cmdline-fix "echo \"" &&
 		test_must_fail git split-cmdline-fix &&
 		echo foo >foo &&
 		git add foo &&
-	git commit -m 'initial commit' &&
-	git config branch.main.mergeoptions 'echo \"' &&
+		git commit -m "initial commit" &&
+		git config branch.main.mergeoptions "echo \"" &&
 		test_must_fail git merge main
-"
+	)
+'
 
 test_expect_success 'git -c "key=value" support' '
 	cat >expect <<-\EOF &&
@@ -1157,10 +1162,16 @@ test_expect_success 'git -c works with aliases of builtins' '
 '
 
 test_expect_success 'aliases can be CamelCased' '
-	test_config alias.CamelCased "rev-parse HEAD" &&
+	test_when_finished "rm -rf repo" &&
+	git init repo &&
+	(
+		cd repo &&
+		test_commit A &&
+		git config alias.CamelCased "rev-parse HEAD" &&
 		git CamelCased >out &&
 		git rev-parse HEAD >expect &&
 		test_cmp expect out
+	)
 '
 
 test_expect_success 'git -c does not split values on equals' '
@@ -2009,11 +2020,11 @@ test_expect_success '--show-origin getting a single key' '
 '
 
 test_expect_success 'set up custom config file' '
-	CUSTOM_CONFIG_FILE="custom.conf" &&
-	cat >"$CUSTOM_CONFIG_FILE" <<-\EOF
+	cat >"custom.conf" <<-\EOF &&
 	[user]
 		custom = true
 	EOF
+	CUSTOM_CONFIG_FILE="$(test-tool path-utils real_path custom.conf)"
 '
 
 test_expect_success !MINGW 'set up custom config file with special name characters' '
@@ -2052,22 +2063,33 @@ test_expect_success '--show-origin stdin with file include' '
 '
 
 test_expect_success '--show-origin blob' '
+	test_when_finished "rm -rf repo" &&
+	git init repo &&
+	(
+		cd repo &&
 		blob=$(git hash-object -w "$CUSTOM_CONFIG_FILE") &&
 		cat >expect <<-EOF &&
 		blob:$blob	user.custom=true
 		EOF
 		git config --blob=$blob --show-origin --list >output &&
 		test_cmp expect output
+	)
 '
 
 test_expect_success '--show-origin blob ref' '
+	test_when_finished "rm -rf repo" &&
+	git init repo &&
+	(
+		cd repo &&
 		cat >expect <<-\EOF &&
 		blob:main:custom.conf	user.custom=true
 		EOF
-	git add "$CUSTOM_CONFIG_FILE" &&
+		cp "$CUSTOM_CONFIG_FILE" custom.conf &&
+		git add custom.conf &&
 		git commit -m "new config file" &&
-	git config --blob=main:"$CUSTOM_CONFIG_FILE" --show-origin --list >output &&
+		git config --blob=main:custom.conf --show-origin --list >output &&
 		test_cmp expect output
+	)
 '
 
 test_expect_success '--show-origin with --default' '

t/t1301-shared-repo.sh

@@ -137,7 +137,7 @@ test_expect_success POSIXPERM 'info/refs respects umask in unshared repo' '
 	test_cmp expect actual
 '
 
-test_expect_success POSIXPERM 'git reflog expire honors core.sharedRepository' '
+test_expect_success REFFILES,POSIXPERM 'git reflog expire honors core.sharedRepository' '
 	umask 077 &&
 	git config core.sharedRepository group &&
 	git reflog expire --all &&

t/t1302-repo-version.sh

@@ -9,10 +9,6 @@ TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '
-	test_oid_cache <<-\EOF &&
-	version sha1:0
-	version sha256:1
-	EOF
 	cat >test.patch <<-\EOF &&
 	diff --git a/test.txt b/test.txt
 	new file mode 100644
@@ -28,7 +24,12 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'gitdir selection on normal repos' '
-	test_oid version >expect &&
+	if test_have_prereq DEFAULT_REPO_FORMAT
+	then
+		echo 0
+	else
+		echo 1
+	fi >expect &&
 	git config core.repositoryformatversion >actual &&
 	git -C test config core.repositoryformatversion >actual2 &&
 	test_cmp expect actual &&
@@ -79,8 +80,13 @@ mkconfig () {
 
 while read outcome version extensions; do
 	test_expect_success "$outcome version=$version $extensions" "
+		test_when_finished 'rm -rf extensions' &&
+		git init extensions &&
+		(
+			cd extensions &&
 			mkconfig $version $extensions >.git/config &&
 			check_${outcome}
+		)
 	"
 done <<\EOF
 allow 0
@@ -94,7 +100,8 @@ allow 1 noop-v1
 EOF
 
 test_expect_success 'precious-objects allowed' '
-	mkconfig 1 preciousObjects >.git/config &&
+	git config core.repositoryFormatVersion 1 &&
+	git config extensions.preciousObjects 1 &&
 	check_allow
 '
 

t/t1409-avoid-packing-refs.sh

@@ -5,6 +5,12 @@ test_description='avoid rewriting packed-refs unnecessarily'
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
+if test_have_prereq !REFFILES
+then
+  skip_all='skipping files-backend specific pack-refs tests'
+  test_done
+fi
+
 # Add an identifying mark to the packed-refs file header line. This
 # shouldn't upset readers, and it should be omitted if the file is
 # ever rewritten.

t/t1419-exclude-refs.sh

@@ -8,6 +8,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
+if test_have_prereq !REFFILES
+then
+	skip_all='skipping `git for-each-ref --exclude` tests; need files backend'
+	test_done
+fi
+
 for_each_ref__exclude () {
 	GIT_TRACE2_PERF=1 test-tool ref-store main \
 		for-each-ref--exclude "$@" >actual.raw

t/t5526-fetch-submodules.sh

@@ -771,7 +771,7 @@ test_expect_success 'fetching submodule into a broken repository' '
 	git -C dst fetch --recurse-submodules &&
 
 	# Break the receiving submodule
-	test-tool -C dst/sub ref-store main delete-refs REF_NO_DEREF msg HEAD &&
+	rm -r dst/sub/.git/objects &&
 
 	# NOTE: without the fix the following tests will recurse forever!
 	# They should terminate with an error.