refactor(os): Retry pacman download on fail

setup.sh

@@ -429,12 +429,18 @@ function update_pacman_db () {
     systemctl start reflector
     # In an ISO and for the minimal number of packages we need we do not
     # care about partial upgrades
-    pacman -Syyuu --noconfirm
+    while ! pacman -Syyuu --needed --noconfirm --downloadonly; do
+        sleep 5
+    done
+    pacman -Syyuu --needed --noconfirm
 }
 
 function install_pkgs () {
     #1.5
     printf -- '%s\n' 'Installing packages ...'
+    while ! pacman -S --needed --noconfirm --downloadonly "${@}"; do
+        sleep 5
+    done
     pacman -S --needed --noconfirm "${@}"
 }
 
@@ -763,7 +769,7 @@ function install_archlinux () {
     #1.12
     pacman_dl_parallel
     pacman_dont_check_space
-    pacstrap /mnt              \
+    while ! pacstrap /mnt              \
                 base                   \
                 base-devel             \
                 linux                  \
@@ -783,7 +789,9 @@ function install_archlinux () {
                 bluez-utils            \
                 man-db                 \
                 xdg-utils              \
-        xdg-user-dirs
+                xdg-user-dirs; do
+        sleep 5
+    done
 }
 
 function gen_fstab () {
@@ -1295,6 +1303,9 @@ function install_os_in_chroot () {
     rm -rf '/etc/pacman.d/gnupg'
     pacman-key --init
     pacman-key --populate archlinux
+    while ! pacman -S archlinux-keyring --noconfirm --downloadonly; do
+        sleep 5
+    done
     pacman -S archlinux-keyring --noconfirm
 
     locale-gen