Selfhosted

A hilariously unnecessary Python script that could have easily been done in bash since it’s literally just a wrapper around rsync. 😅

When you’ve only got a Python-sized hammer in your toolbox, everything looks like a Python nail, I guess.

#!/bin/bash

# Function to read settings
# Settings file format:
# ~/.config/loci/settings
# [backup]
#
# server = <<Name of server>>
# user = <<server user login>>
# backup_root = <<Directory off user's home Directory>>
# taglist = mon tue wed thu fri sat sun spc
# exclude_files = <<not implemented yet - leave blank>>
# source_dir = <<the local directory we are backing up>>
read_settings() {
  settings_file="$HOME/.config/loci/settings"
  if [[ -f "$settings_file" ]]; then
    while IFS='=' read -r key value || [[ -n "$key" ]]; do
      if [[ ! -z "$key" && ! "$key" =~ ^# && ! "$key" =~ ^\[ ]]; then
        key=$(echo "$key" | xargs)
        value=$(echo "$value" | xargs)
        declare -g "$key"="$value"
      fi
    done < "$settings_file"
  else
    echo "Settings file not found: $settings_file"
    exit 1
  fi
}

# Function to perform the backup
backup() {
  local tag="$1"
  read_settings
  
  # Create backup directory if it doesn't exist
  backup_dest="$backup_root/$tag"
  mkdir -p "$backup_dest" 2>/dev/null
  
  # Rsync command for backup
  target="$user@$server:/home/$user/$backup_root/$tag"
  rsync_cmd="rsync -avh $source_dir $target"
  # If exclude_files is defined and not empty, add it to rsync command
  if [[ -n "$exclude_files" ]]; then
    rsync_cmd="rsync -avh --exclude='$exclude_files' $source_dir $target"
  fi
  echo "Command:$rsync_cmd"
  eval "$rsync_cmd"
  
  # Log the backup information
  log_path="$HOME/.backuplog"
  timestamp=$(date +"%Y-%m-%d %H:%M")
  echo "\"$tag\",$timestamp,$rsync_cmd,$timestamp" >> "$log_path"
  
  echo "Backup for '$tag' completed and logged."
}

# Function to remove the backup
remove_backup() {
  local tag="$1"
  read_settings
  
  # Rsync remove command
  rmfile="/home/$user/$backup_root/$tag"
  rm_cmd="ssh $user@$server rm -rf $rmfile"
  eval "$rm_cmd"
  
  # Remove log entries
  log_path="$HOME/.backuplog"
  if [[ -f "$log_path" ]]; then
    # Create a temporary file
    temp_file=$(mktemp)
    # Copy lines not starting with the tag to temp file
    grep -v "^\"$tag\"," "$log_path" > "$temp_file"
    # Replace the original with filtered content
    mv "$temp_file" "$log_path"
  fi
  
  echo "Backup '$tag' removed."
}

# Function to list the backups
list_backups() {
  read_settings
  log_path="$HOME/.backuplog"
  
  # Loop through each tag in the taglist
  for tag in $taglist; do
    # Count occurrences of the tag in the log
    count=0
    youngest=""
    
    if [[ -f "$log_path" ]]; then
      # Get count of tag occurrences
      count=$(grep -c "^\"$tag\"," "$log_path")
      
      # Get the newest backup date for this tag
      if [[ $count -gt 0 ]]; then
        # Extract dates and find the newest one
        dates=$(grep "^\"$tag\"," "$log_path" | cut -d',' -f2)
        youngest=$(echo "$dates" | sort -r | head -1)
      fi
    fi
    
    # Determine status
    if [[ $count -eq 0 ]]; then
      status="Missing"
    elif [[ $count -gt 5 ]]; then
      status="Needs renewal"
    elif [[ ! -z "$youngest" ]]; then
      # Calculate days since last backup
      youngest_seconds=$(date -d "$youngest" +%s)
      now_seconds=$(date +%s)
      days_diff=$(( (now_seconds - youngest_seconds) / 86400 ))
      
      if [[ $days_diff -gt 7 ]]; then
        status="Needs to be run"
      else
        status="Up to date"
      fi
    else
      status="Missing"
    fi
    
    echo "Tag: $tag, Status: $status, Count: $count, Last Backup: ${youngest:-N/A}"
  done
}

# Main function
main() {
  if [[ "$1" == "-b" || "$1" == "--backup" ]] && [[ ! -z "$2" ]]; then
    backup "$2"
  elif [[ "$1" == "-r" || "$1" == "--remove" ]] && [[ ! -z "$2" ]]; then
    remove_backup "$2"
  elif [[ "$1" == "-l" || "$1" == "--list" ]]; then
    list_backups
  else
    echo "Usage: loci -b <tag> | loci -r <tag> | loci -l"
  fi
}

# Execute the script
main "$@"