Add mirror reachability check

Needed error handling
Fix internet connection text not showing up and make it red

archinstall/lib/networking.py

@@ -26,6 +26,14 @@ def list_interfaces(skip_loopback=True):
 	return interfaces
 
 
+def check_mirror_reachable():
+	try:
+		check = SysCommand("pacman -Sy")
+		return check.exit_code == 0
+	except:
+		return False		
+
+
 def enrich_iface_types(interfaces: dict):
 	result = {}
 	for iface in interfaces:

examples/guided.py

@@ -4,6 +4,7 @@ import time
 
 import archinstall
 from archinstall.lib.hardware import has_uefi
+from archinstall.lib.networking import check_mirror_reachable
 
 if archinstall.arguments.get('help'):
 	print("See `man archinstall` for help.")
@@ -387,5 +388,9 @@ def perform_installation(mountpoint):
 	archinstall.log(f"Disk states after installing: {archinstall.disk_layouts()}", level=logging.DEBUG)
 
 
+if not check_mirror_reachable():
+	archinstall.log("Arch Linux mirrors are not reachable. Please check your internet connection and try again.", level=logging.INFO, fg="red")
+	exit(1)
+
 ask_user_questions()
 perform_installation_steps()