Add wait for keyring initialization (#3)

* added check for keyring initialization
* update archlinux-keyring prior to pacstrap

arch-install.sh

@@ -169,6 +169,21 @@ case $STAGE in
 
         # }}}
         # pacstrap {{{
+            KEYRING_INITIALIZING="$(mktemp)"
+            echo "Waiting for arch-keyring to initialize"
+            for _ in {1..300}; do
+                systemctl show pacman-init.service | \
+                    grep -q 'SubState=exited' && \
+                    rm -f $KEYRING_INITIALIZING && \
+                    break
+                sleep 1
+            done
+            if [ -f $KEYRING_INITIALIZING ]; then
+                echo "Keyring did not initialize, aborting!"
+                exit 1
+            fi
+
+            yes | pacman -Sy archlinux-keyring
             pacstrap -K /mnt "${PACKAGES[@]}"
         # }}}
         # genfstab {{{