PyYoshi · November 20, 2025 11:18
diff --git a/README.md b/README.md
diff --git a/svg-to-png b/svg-to-png
 #!/bin/bash

 set -euo pipefail

 # Color definitions
 RED='\033[0;31m'
 GREEN='\033[0;32m'
 YELLOW='\033[1;33m'
 NC='\033[0m' # No Color

 # Default values
 SCALE=4
 OUTPUT_DIR=""
 VERBOSE=false

 # Display usage
 usage() {
    cat << EOF
 Usage: $(basename "$0") [options] <SVG files...>

 Convert SVG files to high-resolution PNG images.
 Automatically adds viewBox and converts using convert-svg-to-png.

 Options:
    -s, --scale <number>    Scale factor (default: 4)
    -o, --output <dir>      Output directory (default: same as source)
    -v, --verbose           Enable verbose output
    -h, --help              Display this help message

 Examples:
    $(basename "$0") input.svg
    $(basename "$0") -s 2 input.svg
    $(basename "$0") -s 3 -o ./output *.svg
    $(basename "$0") --scale 6 --output ./high-res input1.svg input2.svg

 EOF
    exit 0
 }

 # Log output
 log_info() {
    echo -e "${GREEN}[INFO]${NC} $1"
 }

 log_warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
 }

 log_error() {
    echo -e "${RED}[ERROR]${NC} $1" >&2
 }

 log_verbose() {
    if [ "$VERBOSE" = true ]; then
        echo -e "[DEBUG] $1"
    fi
 }

 # Check dependencies
 check_dependencies() {
    log_verbose "Checking dependencies..."
    
    if ! command -v npx &> /dev/null; then
        log_error "npx not found. Please install Node.js."
        exit 1
    fi
    
    if ! command -v sed &> /dev/null; then
        log_error "sed not found."
        exit 1
    fi
    
    log_verbose "Dependency check completed"
 }

 # Add viewBox to SVG
 add_viewbox() {
    local svg_file="$1"
    local backup_file="${svg_file}.bak"
    
    log_verbose "Checking viewBox: $svg_file"
    
    # Create backup
    cp "$svg_file" "$backup_file"
    
    # Skip if viewBox already exists
    if grep -q 'viewBox=' "$svg_file"; then
        log_verbose "viewBox already exists"
        rm "$backup_file"
        return 0
    fi
    
    # Add viewBox
    if sed -i -E 's/width="([0-9.]+)px" height="([0-9.]+)px"/viewBox="0 0 \1 \2" width="\1px" height="\2px"/g' "$svg_file"; then
        log_verbose "viewBox added"
        rm "$backup_file"
        return 0
    else
        log_error "Failed to add viewBox"
        mv "$backup_file" "$svg_file"
        return 1
    fi
 }

 # Convert SVG to PNG
 convert_svg() {
    local svg_file="$1"
    local output_path="$2"
    
    log_info "Converting: $svg_file (scale=$SCALE)"
    
    # Add viewBox
    if ! add_viewbox "$svg_file"; then
        log_error "Failed to add viewBox: $svg_file"
        return 1
    fi
    
    # Set environment variables and execute conversion
    local cmd=(npx convert-svg-to-png-cli "$svg_file" --scale "$SCALE")
    
    # Add output path if specified
    if [ -n "$output_path" ]; then
        cmd+=(--output "$output_path")
    fi
    
    log_verbose "Executing command: CONVERT_SVG_LAUNCH_OPTIONS=... ${cmd[*]}"
    
    if CONVERT_SVG_LAUNCH_OPTIONS='{"args":["--no-sandbox"]}' "${cmd[@]}"; then
        log_info "Conversion completed: ${output_path:-${svg_file%.svg}.png}"
        return 0
    else
        log_error "Conversion failed: $svg_file"
        return 1
    fi
 }

 # Main process
 main() {
    local svg_files=()
    
    # Show usage if no arguments
    if [ $# -eq 0 ]; then
        usage
    fi
    
    # Parse options
    while [ $# -gt 0 ]; do
        case "$1" in
            -h|--help)
                usage
                ;;
            -s|--scale)
                SCALE="$2"
                shift 2
                ;;
            -o|--output)
                OUTPUT_DIR="$2"
                shift 2
                ;;
            -v|--verbose)
                VERBOSE=true
                shift
                ;;
            -*)
                log_error "Unknown option: $1"
                usage
                ;;
            *)
                svg_files+=("$1")
                shift
                ;;
        esac
    done
    
    # Check if SVG files are specified
    if [ ${#svg_files[@]} -eq 0 ]; then
        log_error "Please specify SVG files"
        usage
    fi
    
    # Validate scale value
    if ! [[ "$SCALE" =~ ^[0-9]+(\.[0-9]+)?$ ]] || (( $(echo "$SCALE <= 0" | bc -l) )); then
        log_error "Scale must be a positive number: $SCALE"
        exit 1
    fi
    
    # Create output directory
    if [ -n "$OUTPUT_DIR" ]; then
        mkdir -p "$OUTPUT_DIR"
        OUTPUT_DIR=$(realpath "$OUTPUT_DIR")
        log_verbose "Output directory: $OUTPUT_DIR"
    fi
    
    # Check dependencies
    check_dependencies
    
    # Process each file
    local success_count=0
    local fail_count=0
    
    for svg_file in "${svg_files[@]}"; do
        if [ ! -f "$svg_file" ]; then
            log_warn "File not found: $svg_file"
            ((fail_count++))
            continue
        fi
        
        # Determine output path
        local output_path=""
        if [ -n "$OUTPUT_DIR" ]; then
            local basename=$(basename "$svg_file" .svg)
            output_path="$OUTPUT_DIR/${basename}.png"
        fi
        
        # Execute conversion
        if convert_svg "$svg_file" "$output_path"; then
            ((success_count++))
        else
            ((fail_count++))
        fi
    done
    
    # Result summary
    echo ""
    log_info "Processing completed: $success_count succeeded, $fail_count failed"
    
    if [ $fail_count -gt 0 ]; then
        exit 1
    fi
 }

 # Execute script
 main "$@"
Option	Short	Description	Default
`--scale`	`-s`	Scale factor for output resolution	`4`
`--output`	`-o`	Output directory path	Same as source
`--verbose`	`-v`	Enable verbose logging	Disabled
`--help`	`-h`	Display help message	-
Scale	Use Case	Quality	File Size
1-2	Web display	Standard	Small
2-3	General printing	High	Medium
3-4	High-quality printing	Very High	Large
4-6	Posters/Large format	Professional	Very Large
	#!/bin/bash

	set -euo pipefail

	# Color definitions
	RED='\033[0;31m'
	GREEN='\033[0;32m'
	YELLOW='\033[1;33m'
	NC='\033[0m' # No Color

	# Default values
	SCALE=4
	OUTPUT_DIR=""
	VERBOSE=false

	# Display usage
	usage() {
	cat << EOF
	Usage: $(basename "$0") [options] <SVG files...>

	Convert SVG files to high-resolution PNG images.
	Automatically adds viewBox and converts using convert-svg-to-png.

	Options:
	-s, --scale <number> Scale factor (default: 4)
	-o, --output <dir> Output directory (default: same as source)
	-v, --verbose Enable verbose output
	-h, --help Display this help message

	Examples:
	$(basename "$0") input.svg
	$(basename "$0") -s 2 input.svg
	$(basename "$0") -s 3 -o ./output *.svg
	$(basename "$0") --scale 6 --output ./high-res input1.svg input2.svg

	EOF
	exit 0
	}

	# Log output
	log_info() {
	echo -e "${GREEN}[INFO]${NC} $1"
	}

	log_warn() {
	echo -e "${YELLOW}[WARN]${NC} $1"
	}

	log_error() {
	echo -e "${RED}[ERROR]${NC} $1" >&2
	}

	log_verbose() {
	if [ "$VERBOSE" = true ]; then
	echo -e "[DEBUG] $1"
	fi
	}

	# Check dependencies
	check_dependencies() {
	log_verbose "Checking dependencies..."

	if ! command -v npx &> /dev/null; then
	log_error "npx not found. Please install Node.js."
	exit 1
	fi

	if ! command -v sed &> /dev/null; then
	log_error "sed not found."
	exit 1
	fi

	log_verbose "Dependency check completed"
	}

	# Add viewBox to SVG
	add_viewbox() {
	local svg_file="$1"
	local backup_file="${svg_file}.bak"

	log_verbose "Checking viewBox: $svg_file"

	# Create backup
	cp "$svg_file" "$backup_file"

	# Skip if viewBox already exists
	if grep -q 'viewBox=' "$svg_file"; then
	log_verbose "viewBox already exists"
	rm "$backup_file"
	return 0
	fi

	# Add viewBox
	if sed -i -E 's/width="([0-9.]+)px" height="([0-9.]+)px"/viewBox="0 0 \1 \2" width="\1px" height="\2px"/g' "$svg_file"; then
	log_verbose "viewBox added"
	rm "$backup_file"
	return 0
	else
	log_error "Failed to add viewBox"
	mv "$backup_file" "$svg_file"
	return 1
	fi
	}

	# Convert SVG to PNG
	convert_svg() {
	local svg_file="$1"
	local output_path="$2"

	log_info "Converting: $svg_file (scale=$SCALE)"

	# Add viewBox
	if ! add_viewbox "$svg_file"; then
	log_error "Failed to add viewBox: $svg_file"
	return 1
	fi

	# Set environment variables and execute conversion
	local cmd=(npx convert-svg-to-png-cli "$svg_file" --scale "$SCALE")

	# Add output path if specified
	if [ -n "$output_path" ]; then
	cmd+=(--output "$output_path")
	fi

	log_verbose "Executing command: CONVERT_SVG_LAUNCH_OPTIONS=... ${cmd[*]}"

	if CONVERT_SVG_LAUNCH_OPTIONS='{"args":["--no-sandbox"]}' "${cmd[@]}"; then
	log_info "Conversion completed: ${output_path:-${svg_file%.svg}.png}"
	return 0
	else
	log_error "Conversion failed: $svg_file"
	return 1
	fi
	}

	# Main process
	main() {
	local svg_files=()

	# Show usage if no arguments
	if [ $# -eq 0 ]; then
	usage
	fi

	# Parse options
	while [ $# -gt 0 ]; do
	case "$1" in
	-h\|--help)
	usage
	;;
	-s\|--scale)
	SCALE="$2"
	shift 2
	;;
	-o\|--output)
	OUTPUT_DIR="$2"
	shift 2
	;;
	-v\|--verbose)
	VERBOSE=true
	shift
	;;
	-*)
	log_error "Unknown option: $1"
	usage
	;;
	*)
	svg_files+=("$1")
	shift
	;;
	esac
	done

	# Check if SVG files are specified
	if [ ${#svg_files[@]} -eq 0 ]; then
	log_error "Please specify SVG files"
	usage
	fi

	# Validate scale value
	if ! [[ "$SCALE" =~ ^[0-9]+(\.[0-9]+)?$ ]] \|\| (( $(echo "$SCALE <= 0" \| bc -l) )); then
	log_error "Scale must be a positive number: $SCALE"
	exit 1
	fi

	# Create output directory
	if [ -n "$OUTPUT_DIR" ]; then
	mkdir -p "$OUTPUT_DIR"
	OUTPUT_DIR=$(realpath "$OUTPUT_DIR")
	log_verbose "Output directory: $OUTPUT_DIR"
	fi

	# Check dependencies
	check_dependencies

	# Process each file
	local success_count=0
	local fail_count=0

	for svg_file in "${svg_files[@]}"; do
	if [ ! -f "$svg_file" ]; then
	log_warn "File not found: $svg_file"
	((fail_count++))
	continue
	fi

	# Determine output path
	local output_path=""
	if [ -n "$OUTPUT_DIR" ]; then
	local basename=$(basename "$svg_file" .svg)
	output_path="$OUTPUT_DIR/${basename}.png"
	fi

	# Execute conversion
	if convert_svg "$svg_file" "$output_path"; then
	((success_count++))
	else
	((fail_count++))
	fi
	done

	# Result summary
	echo ""
	log_info "Processing completed: $success_count succeeded, $fail_count failed"

	if [ $fail_count -gt 0 ]; then
	exit 1
	fi
	}

	# Execute script
	main "$@"