Minify contents of images in a folder

minificator.sh

#!/bin/bash

# Requirements (macos)
#    brew install imagemagick
#    brew install jpegoptim
#    brew install optipng   

# Check if both arguments are provided
if [ "$#" -ne 2 ]; then
    echo "Usage: $0 <source_folder> <destination_folder>"
    exit 1
fi

# Set the input and output directories from arguments
input_dir="$1"
output_dir="$2"

# Check if the input directory exists
if [ ! -d "$input_dir" ]; then
    echo "Error: Source folder '$input_dir' does not exist."
    exit 1
fi

# Create the output directory if it doesn't exist
mkdir -p "$output_dir"

# Loop through all image files in the input directory
for file in "$input_dir"/*.{jpg,jpeg,png,gif,webp}; do
    if [ -f "$file" ]; then
        filename=$(basename "$file")
        extension="${filename##*.}"
        filename="${filename%.*}"

        # Copy files with .webp in the name without altering them
        if [[ "$filename" == *".webp"* || "$extension" == "webp" ]]; then
            echo "Copying $filename without alteration as it contains .webp"
            cp "$file" "$output_dir/"
            continue
        fi

        # Resize and compress other image types
        magick "$file" -resize 500x500^ -gravity center -extent 500x500 "$output_dir/${filename}.${extension}"

        # Optimize JPEG images
        if [[ "$extension" == "jpg" || "$extension" == "jpeg" ]]; then
            jpegoptim --strip-all --max=85 "$output_dir/${filename}.${extension}"
        fi

        # Optimize PNG images
        if [[ "$extension" == "png" ]]; then
            optipng -o5 "$output_dir/${filename}.${extension}"
        fi

        echo "Processed: $filename"
    fi
done

echo "Image processing complete!"