Initial commit.

pkgrecover.sh

@@ -0,0 +1,113 @@
+#!/usr/bin/bash
+
+check_dependencies() {
+    if ! command -v pacman &>/dev/null; then
+        echo "pacman is not installed."
+        exit 1
+    fi
+
+    if ! command -v paclog &>/dev/null; then
+        echo "paclog is not installed."
+        exit 1
+    fi
+}
+
+check_date_format() {
+    if ! date -d "$1" &>/dev/null; then
+        echo "Please provide a date in the format 'YYYY-MM-DD HH:MM:SS'. See --help for more information."
+        exit 1
+    fi
+}
+
+using_pacman_db() {
+    if [[ ! -d /var/lib/pacman/local ]]; then
+        echo "The directory /var/lib/pacman/local does not exist."
+        exit 1
+    fi
+
+    # $1 is the date in a valid format. i.e "2024-05-26 00:00:00"
+    check_date_format "$1"
+
+    # Get the list of modified db directories into an array
+    mapfile -t modified_db_dirs < <(find /var/lib/pacman/local -maxdepth 1 -type d -newermt "$1" | awk -F '/' '{print $NF}')
+
+    # Get the list of installed packages into an array
+    mapfile -t installed_packages < <(pacman -Qq)
+
+    matching_packages=()
+
+    # Find the common elements between the two arrays
+    for dir in "${modified_db_dirs[@]}"; do
+        for pkg in "${installed_packages[@]}"; do
+            if [[ "$dir" == $pkg* ]]; then
+                matching_packages+=("$pkg")
+            fi
+        done
+    done
+
+    # $2 is the dry-run flag, if set, just print the packages, else reinstall them piped to pacman
+    if [[ $2 == "--dry-run" ]]; then
+        echo "The following packages will be reinstalled:"
+        for pkg in "${matching_packages[@]}"; do
+            echo "$pkg"
+        done
+    else
+        echo "Reinstalling the following packages:"
+        sudo pacman -S "${matching_packages[@]}" --noconfirm
+    fi
+}
+
+using_paclog() {
+    if [[ ! -f /var/log/pacman.log ]]; then
+        echo "The file /var/log/pacman.log does not exist."
+        exit 1
+    fi
+
+    # $1 is the date in a valid format. i.e "2024-05-26 00:00:00"
+    check_date_format "$1"
+
+    # Get the list of packages upgraded after the given date
+    mapfile -t matching_packages < <(paclog --after "$1" | grep -oE "upgraded (\S+)" | cut -d ' ' -f 2)
+
+    # $2 is the dry-run flag, if set, just print the packages, else reinstall them piped to pacman
+    if [[ $2 == "--dry-run" ]]; then
+        echo "The following packages will be reinstalled:"
+        for pkg in "${matching_packages[@]}"; do
+            echo "$pkg"
+        done
+    else
+        echo "Reinstalling the following packages:"
+        sudo pacman -S "${matching_packages[@]}" --noconfirm
+    fi
+}
+
+usage() {
+    echo "Usage: $0 [OPTIONS]"
+    echo "Options:"
+    echo "  --pacman-db \"<date>\" [--dry-run]  Reinstall packages upgraded after the given date using pacman database. Please quote the date."
+    echo "  --paclog \"<date>\" [--dry-run]     Reinstall packages upgraded after the given date using pacman log. Please quote the date."
+    exit 1
+}
+
+if [[ $# -eq 0 ]]; then
+    usage
+fi
+
+# Parse the command line arguments
+while [[ $# -gt 0 ]]; do
+    case $1 in
+    --pacman-db)
+        check_dependencies
+        using_pacman_db "$2" "$3"
+        shift 3
+        ;;
+    --paclog)
+        check_dependencies
+        using_paclog "$2" "$3"
+        shift 3
+        ;;
+    *)
+        usage
+        ;;
+    esac
+done