Testing restore function

update_arch.sh

@@ -2,6 +2,95 @@
 set -e
 sudo -v
 
+ACTION="${1:-update}"
+
+restore_latest_state() {
+    printf -- '\033[33m Gathering restore options\n\033[37m'
+
+    BOOT_BACKUP_DIR="${HOME}/boot-backups"
+
+    TIMESLICE_INFO=""
+    SNAPSHOT_CREATED=""
+    TIMESLICE_LABEL=""
+    if pacman -Qs timeshift >/dev/null; then
+        TIMESLICE_INFO=$(sudo timeshift --list | awk '
+            /^Snapshot/ {snap=$2}
+            /^Created on/ {created=$4 " " $5}
+            END { if (snap != "") { print snap "|" created } }
+        ')
+        if [ -n "$TIMESLICE_INFO" ]; then
+            TIMESLICE_LABEL=${TIMESLICE_INFO%%|*}
+            SNAPSHOT_CREATED=${TIMESLICE_INFO##*|}
+            if [ "$SNAPSHOT_CREATED" = "$TIMESLICE_LABEL" ]; then
+                SNAPSHOT_CREATED=""
+            fi
+        fi
+    fi
+
+    LATEST_BOOT=""
+    if [ -d "$BOOT_BACKUP_DIR" ]; then
+        LATEST_BOOT=$( (ls -1t "$BOOT_BACKUP_DIR"/boot-*.tar.gz 2>/dev/null || true) | head -n1 )
+    fi
+
+    if [ -n "$TIMESLICE_LABEL" ]; then
+        if [ -n "$SNAPSHOT_CREATED" ]; then
+            printf -- '\033[33m Latest Timeshift snapshot: %s (created %s)\n\033[37m' "$TIMESLICE_LABEL" "$SNAPSHOT_CREATED"
+        else
+            printf -- '\033[33m Latest Timeshift snapshot: %s\n\033[37m' "$TIMESLICE_LABEL"
+        fi
+    else
+        printf -- '\033[33m No Timeshift snapshots available\n\033[37m'
+    fi
+
+    if [ -n "$LATEST_BOOT" ]; then
+        BOOT_BASENAME=$(basename "$LATEST_BOOT")
+        BOOT_STAMP=${BOOT_BASENAME#boot-}
+        BOOT_STAMP=${BOOT_STAMP%.tar.gz}
+        printf -- '\033[33m Latest /boot archive: %s (saved %s)\n\033[37m' "$BOOT_BASENAME" "$BOOT_STAMP"
+    else
+        printf -- '\033[33m No /boot backup archives available\n\033[37m'
+    fi
+
+    if [ -z "$TIMESLICE_LABEL" ] && [ -z "$LATEST_BOOT" ]; then
+        printf -- '\033[31m Nothing to restore\n\033[37m'
+        exit 1
+    fi
+
+    RESTORED_ANY=0
+
+    if [ -n "$TIMESLICE_LABEL" ]; then
+        read -r -p "Restore this Timeshift snapshot? [y/N]: " CONFIRM
+        if [[ "$CONFIRM" =~ ^[Yy]$ ]]; then
+            printf -- '\033[33m Starting Timeshift restore (follow on-screen prompts)\n\033[37m'
+            sudo timeshift --restore --snapshot "$TIMESLICE_LABEL" --yes
+            RESTORED_ANY=1
+        else
+            printf -- '\033[33m Timeshift restore skipped\n\033[37m'
+        fi
+    fi
+
+    if [ -n "$LATEST_BOOT" ]; then
+        read -r -p "Restore /boot from this archive? [y/N]: " BOOT_CONFIRM
+        if [[ "$BOOT_CONFIRM" =~ ^[Yy]$ ]]; then
+            printf -- '\033[33m Restoring /boot from %s\n\033[37m' "$LATEST_BOOT"
+            sudo tar -C /boot -xpf "$LATEST_BOOT"
+            printf -- '\033[32m /boot restore complete\n\033[37m'
+            RESTORED_ANY=1
+        else
+            printf -- '\033[33m /boot restore skipped\n\033[37m'
+        fi
+    fi
+
+    if [ "$RESTORED_ANY" -eq 0 ]; then
+        printf -- '\033[33m No restore actions performed\n\033[37m'
+    fi
+}
+
+if [ "$ACTION" == "restore" ]; then
+    restore_latest_state
+    exit 0
+fi
+
 if ! pacman -Qs inetutils >/dev/null; then
     sudo pacman -Syy --noconfirm inetutils
 fi
@@ -91,6 +180,30 @@ EOT
     fi
 fi
 
+# Back up /boot ahead of kernel upgrades so it aligns with Timeshift snapshots
+sudo pacman -Sy --noconfirm >/dev/null
+KERNEL_PACKAGES=(linux linux-lts linux-zen linux-hardened linux-rt linux-rt-lts linux-rt-bfq linux-xanmod linux-xanmod-lts linux-xanmod-tt)
+PENDING_KERNELS=()
+for kernel_pkg in "${KERNEL_PACKAGES[@]}"; do
+    if pacman -Qi "$kernel_pkg" >/dev/null 2>&1; then
+        if pacman -Qu "$kernel_pkg" >/dev/null 2>&1; then
+            PENDING_KERNELS+=("$kernel_pkg")
+        fi
+    fi
+done
+
+if [ "${#PENDING_KERNELS[@]}" -gt 0 ]; then
+    printf -- '\\033[33m Kernel update detected; backing up /boot\\n\\033[37m'
+    BOOT_BACKUP_DIR="${HOME}/boot-backups"
+    mkdir -p "$BOOT_BACKUP_DIR"
+    BACKUP_FILE="${BOOT_BACKUP_DIR}/boot-$(date +%Y%m%d-%H%M%S).tar.gz"
+    sudo tar -C /boot -acf "$BACKUP_FILE" .
+    sudo chown "$USER":"$USER" "$BACKUP_FILE"
+    printf -- '\\033[32m    Saved /boot backup to %s\\n\\033[37m' "$BACKUP_FILE"
+else
+    printf -- '\\033[33m No kernel update detected; skipping /boot backup\\n\\033[37m'
+fi
+
 # Update all pacman packages
 printf -- '\033[33m Updating pacman packages\n\033[37m'
 sudo pacman -Suyy --noconfirm

update_wrapper.sh

@@ -17,8 +17,8 @@ if [ -d ~/linuxbox ]; then
     cd ~/linuxbox &&
         git pull &&
         if [ "$OS" == "Ubuntu" ]; then
-            ./update_ubuntu.sh
+            ./update_ubuntu.sh "$@"
         elif [ "$OS" == "Arch Linux" ]; then
-            ./update_arch.sh
+            ./update_arch.sh "$@"
         fi
 fi