Add a test showing that removing a submodule in a linked worktree deletes the wrong git dir

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pkg/integration/tests/submodule/remove_in_linked_worktree.go

@@ -0,0 +1,52 @@
+package submodule
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var RemoveInLinkedWorktree = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Remove a submodule in a linked worktree",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.EmptyCommit("first commit")
+		shell.CloneIntoSubmodule("my_submodule_name", "my_submodule_path")
+		shell.GitAddAll()
+		shell.Commit("add submodule")
+
+		shell.AddWorktree("HEAD", "../linked-worktree", "mybranch")
+		shell.Chdir("../linked-worktree")
+		shell.RunCommand([]string{"git", "submodule", "update", "--init"})
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		// Git keeps the git dirs of submodules separately for each worktree
+		mainGitDirSubmodulePath := "../repo/.git/modules/my_submodule_name"
+		linkedGitDirSubmodulePath := "../repo/.git/worktrees/linked-worktree/modules/my_submodule_name"
+		t.FileSystem().
+			PathPresent(mainGitDirSubmodulePath).
+			PathPresent(linkedGitDirSubmodulePath)
+
+		t.Views().Submodules().Focus().
+			Lines(
+				Contains("my_submodule_name").IsSelected(),
+			).
+			Press(keys.Universal.Remove).
+			Tap(func() {
+				t.ExpectPopup().Confirmation().
+					Title(Equals("Remove submodule")).
+					Content(Equals("Are you sure you want to remove submodule 'my_submodule_name' and its corresponding directory? This is irreversible.")).
+					Confirm()
+			}).
+			IsEmpty()
+
+		t.FileSystem().
+			/* EXPECTED:
+			PathPresent(mainGitDirSubmodulePath).
+			PathNotPresent(linkedGitDirSubmodulePath)
+			ACTUAL: */
+			PathNotPresent(mainGitDirSubmodulePath).
+			PathPresent(linkedGitDirSubmodulePath)
+	},
+})

pkg/integration/tests/test_list.go

@@ -579,6 +579,7 @@ var tests = []*components.IntegrationTest{
 	submodule.EnterFromDotfileBareRepo,
 	submodule.EnterNested,
 	submodule.Remove,
+	submodule.RemoveInLinkedWorktree,
 	submodule.RemoveNested,
 	submodule.Reset,
 	submodule.ResetFolder,