Improve installer updates and dependency checks and add command aliases

internal/hook/hook_test.go

@@ -261,3 +261,30 @@ func writeProfile(t *testing.T, content string) string {
 	}
 	return f
 }
+
+func TestManagedBlockInstallAndUninstall(t *testing.T) {
+	original := "export KEEP=yes\n# netssh shell-init documentation\necho 'netssh shell-init'\n"
+	profile := writeProfile(t, original+hook.BlockStart+"\nexport PATH='/custom/bin':\"$PATH\"\n'/custom/bin/netssh' shell-init\n[ ! -f '/custom/cache/netssh/aliases.sh' ] || . '/custom/cache/netssh/aliases.sh'\n"+hook.BlockEnd+"\n")
+	if installed, err := hook.Install(profile); err != nil || installed {
+		t.Fatalf("duplicate install: %v, %v", installed, err)
+	}
+	if installed, err := hook.InstallAliasesSource(profile); err != nil || installed {
+		t.Fatalf("duplicate source: %v, %v", installed, err)
+	}
+	if removed, err := hook.Uninstall(profile); err != nil || !removed {
+		t.Fatalf("uninstall: %v, %v", removed, err)
+	}
+	data, _ := os.ReadFile(profile)
+	if string(data) != original {
+		t.Fatalf("unrelated content changed: %s", data)
+	}
+}
+
+func TestProfilePathRespectsZdotdir(t *testing.T) {
+	dir := t.TempDir()
+	t.Setenv("ZDOTDIR", dir)
+	path, err := hook.ProfilePath("zsh")
+	if err != nil || path != filepath.Join(dir, ".zshrc") {
+		t.Fatalf("zsh path: %s, %v", path, err)
+	}
+}