Lists comic files across folders and subfolders

list_comics.sh

#!/usr/bin/env bash
# list_comics.sh — Lists comics files across folders and subfolders
# Usage: ./list_comics.sh [directory] [output.txt]

# --- Config ---
COMICS_DIR="${1:-/mnt/comics}"
OUTPUT_FILE="${2:-comics_list.txt}"
EXTENSIONS=("cbr" "cbz" "cb7" "cbt" "pdf" "epub" "djvu")

# --- Validation ---
if [[ ! -d "$COMICS_DIR" ]]; then
    echo "Error: directory not found: $COMICS_DIR"
    echo "Usage: $0 [directory] [output.txt]"
    exit 1
fi

# --- Build extension pattern for find ---
find_args=()
for ext in "${EXTENSIONS[@]}"; do
    find_args+=(-o -iname "*.${ext}")
done
# Remove the leading "-o" from the array
find_args=("${find_args[@]:1}")

# --- Output file header ---
{
    echo "======================================================"
    echo " COMICS LIBRARY"
    echo " Directory: $(realpath "$COMICS_DIR")"
    echo " Generated: $(date '+%Y-%m-%d %H:%M:%S')"
    echo "======================================================"
    echo ""
} > "$OUTPUT_FILE"

# --- Process folder by folder ---
TOTAL_FILES=0
CURRENT_FOLDER=""

while IFS= read -r -d '' file; do
    folder=$(dirname "$file")
    name=$(basename "$file")
    folder_rel="${folder#$COMICS_DIR/}"

    # Print folder header when folder changes
    if [[ "$folder" != "$CURRENT_FOLDER" ]]; then
        CURRENT_FOLDER="$folder"
        echo "" >> "$OUTPUT_FILE"
        echo "📁 $folder_rel" >> "$OUTPUT_FILE"
        echo "------------------------------------------------------" >> "$OUTPUT_FILE"
    fi

    echo "  $name" >> "$OUTPUT_FILE"
    ((TOTAL_FILES++))

done < <(find "$COMICS_DIR" \( "${find_args[@]}" \) -type f -print0 | sort -z)

# --- Footer ---
{
    echo ""
    echo "======================================================"
    echo " TOTAL FILES: $TOTAL_FILES"
    echo "======================================================"
} >> "$OUTPUT_FILE"

echo "✅ Done! $TOTAL_FILES file(s) listed in: $OUTPUT_FILE"