backup.sh

 1#!/usr/bin/env bash
 2# shellcheck disable=SC2155
 3
 4# ------------------------------------------------------------
 5# Configuration: Add files and directories to backup below
 6# ------------------------------------------------------------
 7PATHS_TO_BACKUP=(
 8    # provide absolute paths to files and directories
 9    # ~ does not work here, use $HOME instead
10
11    "$HOME/.config"
12    # "/etc"
13    # "/path/to/important/file.txt"
14    # "/path/to/important/directory"
15    # Add as many paths as you need
16)
17
18# use rsync if available, otherwise fall back to cp
19cp() {
20    if command -v rsync &> /dev/null; then
21        command rsync -a "$@"
22    else
23        command cp -r "$@"
24    fi
25}
26
27backup_item() {
28    local path="$1"
29    local backup_dir="$2"
30    local timestamp="$(date +"%Y%m%d_%H%M%S")"
31
32    # Check if the path exists
33    if [ ! -e "$path" ]; then
34        echo "🛑 Error: $path does not exist"
35        return 1
36    fi
37
38    # Get basename of the path
39    local basename="$(basename "$path")"
40
41    # Create backup name with timestamp
42    if [ -n "$backup_dir" ]; then
43        # If backup directory specified, put backup there
44        local backup_name="${backup_dir}/${basename}.${timestamp}.bak"
45
46        # Ensure backup directory exists
47        mkdir -p "$backup_dir"
48    else
49        # Otherwise put backup in same directory as original with .bak extension
50        local backup_name="${path}.${timestamp}.bak"
51    fi
52
53    # Make the backup
54    if [ -d "$path" ]; then
55        # It's a directory
56        cp "$path" "$backup_name"
57        echo "✅ Directory backup created: $backup_name"
58    else
59        # It's a file
60        cp "$path" "$backup_name"
61        echo "✅ File backup created: $backup_name"
62    fi
63}
64
65# Optional backup directory from command line argument
66BACKUP_DIR=""
67if [ $# -eq 1 ]; then
68    BACKUP_DIR="$1"
69    echo "ℹ️  Backup destination directory: $BACKUP_DIR"
70fi
71
72# Check if any paths are configured
73if [ ${#PATHS_TO_BACKUP[@]} -eq 0 ]; then
74    echo "🛑 Error: No paths configured for backup"
75    echo "🛑 Please edit the script and add paths to the PATHS_TO_BACKUP array"
76    exit 1
77fi
78
79echo "ℹ️  Starting backup at $(date)"
80
81# Process each configured path
82for item in "${PATHS_TO_BACKUP[@]}"; do
83    backup_item "$item" "$BACKUP_DIR"
84done
85
86echo "ℹ️  Backup complete! $(date)"