Make do_install possible from dict instead of just list

install.py

@@ -105,30 +105,39 @@ class Installer:
         if executable:
             p_dest.chmod(0o755)
 
-    def do_install(self, *packages) -> None:
+    def do_install(self, *packages, **os_specific_packages) -> None:
-        """Install packages with OS-dependent package manager."""
+        """Install packages with OS-specific package manager.
+
+        Packages can either be in a list for non OS-specific packages, or in a
+        dict for OS-specific packages.
+        """
+
+        if not packages:  # we got the dict, make a list out of it
+            try:
+                packages = os_specific_packages[self.operating_system].split()\
+                         + os_specific_packages["both"].split()
+            except KeyError:
+                ui.fatal("Operating System not understood.")
+                return
 
         failed_installs = []
 
+        ui.info_2("Installing packages...")
         for package in packages:
-            ui.info_2("Installing", package, ui.ellipsis, end='')
             if self.operating_system == "arch based":
                 command = "sudo pacman -S --needed {}".format(package)
             elif self.operating_system == "debian based":
                 command = "sudo apt install {}".format(package)
-            else:
-                ui.fatal("Operating System not understood.")
-                return
 
             install = subprocess.run(command, check=False, shell=True,
                                      stdout=subprocess.DEVNULL,
                                      stderr=subprocess.DEVNULL)
 
             if install.returncode != 0:
-                ui.info(ui.cross)
+                ui.info(ui.cross, package)
                 failed_installs.append(package)
             else:
-                ui.info(ui.check)
+                ui.info(ui.check, package)
 
         if len(failed_installs) > 0:
             ui.warning("These packages failed to install:")
@@ -269,8 +278,11 @@ def define_os() -> str:
                 return "debian based"
 
     ui.warning("Operating system wasn't found")
+    operating_system = input("What is it ? ")
+    if operating_system in ("arch", "debian"):
+        return operating_system + " based"
 
-    return input("What is it ? ")
+    return ui.fatal("I only support Arch and Debian based distros.")
 
 
 def main() -> None: