Stop yay from asking so many questions

arch_update

@@ -1,45 +1,31 @@
-#! /bin/sh -
-#Full Arch Linux Update Script
+#!/bin/sh
+# Full Arch Linux Update Script
 
-SNAPSHOT_DIR=/.snapshots
-DAYS_TO_KEEP=30
+set -e
 
-# Backup system
-if which btrfs >/dev/null; then
-    echo -e '\nCreating backup...' >&2
-
-    cur_time=$(date -Is)
-    cur_time_s=$(date -d $cur_time +%s)
-
-    for file in $(ls "$SNAPSHOT_DIR"); do
-        old_time_s=$(date -d $(echo "$file" | sed 's/[[:alpha:]]\+-//') +%s)
-        if [ $(((cur_time_s - old_time_s) / 86400)) -gt $DAYS_TO_KEEP ]; then
-            sudo btrfs subvolume delete "$SNAPSHOT_DIR"/"$file"
-        fi
-    done
-
-    sudo btrfs subvolume snapshot / "$SNAPSHOT_DIR"/root-$cur_time
-    sudo btrfs subvolume snapshot /home "$SNAPSHOT_DIR"/home-$cur_time
-fi
+BACKUP_LIMIT=3
 
 # Check dependencies
 echo -e '\nInstalling dependencies ...' >&2
-! which curl >/dev/null 2>&1 && sudo pacman -Syu curl
-! which git >/dev/null 2>&1 && sudo pacman -Syu git
-if ! which vim >/dev/null 2>&1; then
-    sudo pacman -Syu neovim
-    sudo ln -s /usr/bin/nvim /usr/local/bin/vim
-fi
-! which rankmirrors >/dev/null 2>&1 && sudo pacman -Syu pacman-contrib
 if ! which yay >/dev/null 2>&1; then
-    sudo pacman -Syu
     git clone https://aur.archlinux.org/yay.git
     cd yay
     makepkg -cirs
     cd ..
     rm -fr yay
 fi
-! which yaycache >/dev/null 2>&1 && yay -Syu yaycache
+yay -Syu --needed --noconfirm curl git neovim pacman-contrib yaycache
+[ ! -e /usr/local/bin/vim ] && sudo ln -s /usr/bin/nvim /usr/local/bin/vim
+
+# Backup system
+if which btrfs >/dev/null; then
+    yay -Syu --needed --noconfirm snapper
+    [ ! -f /etc/snapper/configs/root ] && sudo snapper -c root create-config /
+    [ ! $(sudo awk -F '"' '/NUMBER_LIMIT=/ {print $2}' /etc/snapper/configs/root) -eq $BACKUP_LIMIT ] && sudo sed -i.bak "s/\(NUMBER_LIMIT=\"\).*\"/\1$BACKUP_LIMIT\"/" /etc/snapper/configs/root
+
+    echo -e '\nCreating backup...' >&2
+    sudo snapper -c root create -c number
+fi
 
 # Update mirrors
 echo -e '\nUpdating mirrors ...' >&2
@@ -47,12 +33,12 @@ curl -s 'https://archlinux.org/mirrorlist/?country=DE&protocol=https&use_mirror_
 
 # Update system
 echo -e '\nUpdating system ...' >&2
-yay -Syu
+yay -Syu --noconfirm
 
 # Remove orphans
 echo -e '\nRemoving orphans ...' >&2
 orphans=$(yay -Qtdq)
-[ ! "X$orphans" = 'X' ] && yay -Rns $orphans
+[ ! "X$orphans" = 'X' ] && yay -Rns --noconfirm $orphans
 
 # Clean cache
 echo -e '\nCleaning cache ...' >&2