t/2NNNN: allow local submodules

To prepare for the default value of `protocol.file.allow` to change to
"user", ensure tests that rely on local submodules can initialize them
over the file protocol.

Tests that only need to interact with submodules in a limited capacity
have individual Git commands annotated with the appropriate
configuration via `-c`. Tests that interact with submodules a handful of
times use `test_config_global` instead. Test scripts that rely on
submodules throughout use a `git config --global` during a setup test
towards the beginning of the script.

Signed-off-by: Taylor Blau <[email protected]>

Author: ttaylorr

t/t2400-worktree-add.sh

@@ -597,6 +597,7 @@ test_expect_success '"add" should not fail because of another bad worktree' '
 '
 
 test_expect_success '"add" with uninitialized submodule, with submodule.recurse unset' '
+	test_config_global protocol.file.allow always &&
 	test_create_repo submodule &&
 	test_commit -C submodule first &&
 	test_create_repo project &&
@@ -612,6 +613,7 @@ test_expect_success '"add" with uninitialized submodule, with submodule.recurse
 '
 
 test_expect_success '"add" with initialized submodule, with submodule.recurse unset' '
+	test_config_global protocol.file.allow always &&
 	git -C project-clone submodule update --init &&
 	git -C project-clone worktree add ../project-4
 '

t/t2403-worktree-move.sh

@@ -138,7 +138,8 @@ test_expect_success 'move a repo with uninitialized submodule' '
 	(
 		cd withsub &&
 		test_commit initial &&
-		git submodule add "$PWD"/.git sub &&
+		git -c protocol.file.allow=always \
+			submodule add "$PWD"/.git sub &&
 		git commit -m withsub &&
 		git worktree add second HEAD &&
 		git worktree move second third
@@ -148,7 +149,7 @@ test_expect_success 'move a repo with uninitialized submodule' '
 test_expect_success 'not move a repo with initialized submodule' '
 	(
 		cd withsub &&
-		git -C third submodule update &&
+		git -c protocol.file.allow=always -C third submodule update &&
 		test_must_fail git worktree move third forth
 	)
 '
@@ -227,6 +228,7 @@ test_expect_success 'remove cleans up .git/worktrees when empty' '
 '
 
 test_expect_success 'remove a repo with uninitialized submodule' '
+	test_config_global protocol.file.allow always &&
 	(
 		cd withsub &&
 		git worktree add to-remove HEAD &&
@@ -235,6 +237,7 @@ test_expect_success 'remove a repo with uninitialized submodule' '
 '
 
 test_expect_success 'not remove a repo with initialized submodule' '
+	test_config_global protocol.file.allow always &&
 	(
 		cd withsub &&
 		git worktree add to-remove HEAD &&

t/t2405-worktree-submodule.sh

@@ -7,6 +7,7 @@ test_description='Combination of submodules and multiple worktrees'
 base_path=$(pwd -P)
 
 test_expect_success 'setup: create origin repos'  '
+	git config --global protocol.file.allow always &&
 	git init origin/sub &&
 	test_commit -C origin/sub file1 &&
 	git init origin/main &&