DAY-1 Solution by Shina Gupta

Challenges/Day_2/backup_with_rotation.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Function to display usage information and available options
+# Display usage information
 function display_usage {
     echo "Usage: $0 /path/to/source_directory"
 }
@@ -12,27 +12,32 @@ if [ $# -eq 0 ] || [ ! -d "$1" ]; then
     exit 1
 fi
 
-# Directory path of the source directory to be backed up
+# Assign source directory from command-line argument
 source_dir="$1"
 
-# Function to create a timestamped backup folder
+# Function to create a timestamped backup and zip it
 function create_backup {
-    local timestamp=$(date '+%Y-%m-%d_%H-%M-%S')  # Get the current timestamp
+    local timestamp=$(date '+%Y-%m-%d_%H-%M-%S')
     local backup_dir="${source_dir}/backup_${timestamp}"
 
-    # Create the backup folder with the timestamped name
-    mkdir "$backup_dir"
-    echo "Backup created successfully: $backup_dir"
+    # Create backup directory and zip its contents
+    zip -r "${backup_dir}.zip" "$source_dir" >/dev/null
+    if [ $? -eq 0 ]; then
+        echo "Backup created successfully: ${backup_dir}.zip"
+    else
+        echo "Error: Failed to create backup."
+    fi
 }
 
-# Function to perform the rotation and keep only the last 3 backups
+# Function to perform rotation and keep only the last 3 backups
 function perform_rotation {
-    local backups=($(ls -t "${source_dir}/backup_"* 2>/dev/null))  # List existing backups sorted by timestamp
+    local backups=($(ls -t "${source_dir}/backup_"*.zip 2>/dev/null))
 
-    # Check if there are more than 3 backups
     if [ "${#backups[@]}" -gt 3 ]; then
-        local backups_to_remove="${backups[@]:3}"  # Get backups beyond the last 3
-        rm -rf "${backups_to_remove[@]}"  # Remove the oldest backups
+        local backups_to_remove=("${backups[@]:3}")
+        for backup in "${backups_to_remove[@]}"; do
+            rm -f "$backup"
+        done
     fi
 }