generate-icons.sh

#!/bin/bash
set -e

# Generate favicon.ico and PNG icons from favicon.svg
# Requires: Inkscape, ImageMagick

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PUBLIC_DIR="$(cd "$SCRIPT_DIR/../public" && pwd)"
SOURCE_SVG="$PUBLIC_DIR/favicon.svg"

echo "Generating icons from favicon.svg"
echo "=================================="
echo ""

# Check for source SVG
if [ ! -f "$SOURCE_SVG" ]; then
    echo "Error: Source file not found: $SOURCE_SVG"
    exit 1
fi

# Check for required tools
if ! command -v inkscape &> /dev/null; then
    echo "Error: Inkscape is required but not installed."
    echo "Install with: brew install inkscape"
    exit 1
fi

# Check for ImageMagick (prefer magick for v7, fallback to convert for v6)
if command -v magick &> /dev/null; then
    IMAGEMAGICK_CMD="magick"
elif command -v convert &> /dev/null; then
    IMAGEMAGICK_CMD="convert"
else
    echo "Error: ImageMagick is required but not installed."
    echo "Install with: brew install imagemagick"
    exit 1
fi

echo "Source: $SOURCE_SVG"
echo "Output: $PUBLIC_DIR"
echo ""

# Define sizes
SIZES=(16 32 192 512)
APPLE_TOUCH_SIZE=180

# Create temporary directory for intermediate files
TEMP_DIR=$(mktemp -d)
trap "rm -rf $TEMP_DIR" EXIT

echo "Exporting PNG files..."

# Export each size using Inkscape
for size in "${SIZES[@]}"; do
    output_file="$PUBLIC_DIR/icon-${size}.png"
    echo "  Generating icon-${size}.png..."
    inkscape "$SOURCE_SVG" \
        --export-type=png \
        --export-filename="$output_file" \
        --export-width="$size" \
        --export-height="$size" \
        2>/dev/null
done

# Generate apple-touch-icon (180x180)
echo "  Generating apple-touch-icon.png (${APPLE_TOUCH_SIZE}x${APPLE_TOUCH_SIZE})..."
inkscape "$SOURCE_SVG" \
    --export-type=png \
    --export-filename="$PUBLIC_DIR/apple-touch-icon.png" \
    --export-width="$APPLE_TOUCH_SIZE" \
    --export-height="$APPLE_TOUCH_SIZE" \
    2>/dev/null

echo ""
echo "Generating favicon.ico..."

# Create favicon.ico from 16x16 and 32x32 PNGs using ImageMagick
$IMAGEMAGICK_CMD "$PUBLIC_DIR/icon-16.png" "$PUBLIC_DIR/icon-32.png" \
    -colors 256 \
    "$PUBLIC_DIR/favicon.ico"

echo ""
echo "Generated files:"
ls -lh "$PUBLIC_DIR/favicon.ico" "$PUBLIC_DIR/icon-"*.png "$PUBLIC_DIR/apple-touch-icon.png"

echo ""
echo "Done!"