Use dpkg status

.github/release-nest-v3

@@ -1 +1 @@
-5
+6

data/locales/en_US.json

@@ -47,5 +47,6 @@
   "sched_ext_cmd_status_dialog_body_success": "SCX has been set to",
   "sched_ext_cmd_status_dialog_heading_failed": "Failed!",
   "sched_ext_cmd_status_dialog_body_failed": "SCX couldn't be has been set to",
-  "sched_ext_null_checkbutton_label": "No Scheduler selected"
+  "sched_ext_null_checkbutton_label": "No Scheduler selected",
+  "installed": "Installed!"
 }

data/scripts/check-pkg.sh

@@ -0,0 +1,10 @@
+#! /usr/bin/bash
+export LANG=C
+
+package=$1
+if dpkg-query -W -f='${Status}' $package 2>/dev/null | grep -q "install ok installed"
+then
+    exit 0
+else
+    exit 1
+fi

debian/changelog

@@ -1,4 +1,4 @@
-pika-kernel-manager (0.1.3-101pika4) pika; urgency=low
+pika-kernel-manager (0.1.3-101pika5) pika; urgency=low
 
   * Initial Release
 

src/kernel_pkg/mod.rs

@@ -223,8 +223,8 @@ fn add_package_rows(
             let kernel_main_package_clone0 = kernel_main_package.clone();
 
             std::thread::spawn(move || loop {
-                let command_installed_status = Command::new("dpkg")
-                    .args(["-s", &kernel_main_package_clone0])
+                let command_installed_status = Command::new("/usr/lib/pika/kernel-manager/scripts/check-pkg.sh")
+                    .arg(&kernel_main_package_clone0)
                     .output()
                     .unwrap();
                 let command_get_kernel_pika = Command::new("/usr/lib/pika/kernel-manager/scripts/get_kernel_pika.sh")