covergenerator.sh

#!/bin/bash

checkdeps() {
	local deps

	deps="awk crc32 sed optipng"
	unameOut="$(uname -s)"
	url="your system package manager"
	imagemagick="/c/library/ImageMagick"
	[ ! -d "$imagemagick" ] && deps="awk crc32 sed optipng imagemagick"
	case "${unameOut}" in
	CYGWIN* | MINGW*)
		OS=Windows
		;;
	esac

	for dep in $deps; do

		if [ -z "$(command -v "$dep")" ]; then
			echo "############################################################################################"
			echo "#"
			echo "#  Dependency     : $dep"
			echo "#  Description    : Fatal: the required dependency \"$dep\" is missing."
			echo "#"
			echo "#  !!! Please install \"$dep\" on your system. !!!"
			echo "#"
			if [ $OS = "Windows" ]; then
				path="C:\Program Files\Git\usr\bin"

				case "$dep" in
				crc32)
					url="http://esrg.sourceforge.net/utils_win_up/md5sum/crc32.exe"
					;;
				optipng)
					url="http://prdownloads.sourceforge.net/optipng/optipng-0.7.7-win32.zip?download"
					;;
				imagemagick)
					url="https://imagemagick.org/download/binaries/ImageMagick-7.0.8-63-portable-Q16-x86.zip"
					path="C:\library\ImageMagick"
					;;
				esac

			fi
			echo "#  Get it at \"$url\""
			if [ "$OS" = "Windows" ]; then
				echo "#  And copy it to \"$path\""
			fi
			echo "#"
			echo "############################################################################################"
			exit 1
		fi

	done
}

rename() {
	if [ -f "$1" ]; then
		echo "Renaming '$1' to '$2' "
		mv "$1" "$2"
	fi
}

remove() {
	[ -f "$1" ] && rm -rf "$1"
}

help() {
	echo ""
	echo "Usage:
   sh $(basename "$0") files | [options]..."
	echo ""
	echo "Files:
   Rom files of type: \"*.nes\", \"*.snes\", \"*.gb\", \"*.gbc\", \"*.sms\", \"*.gen\", \"*.gg\""
	echo ""
	echo "Options:
   -?, -h, -help			This information screen
   *.md                Convert Mega Drive roms \"*.md\" to nds compatible roms \"*.gen\"
   -png               Optimize png files"
	echo ""
	echo "Examples:
   sh $(basename "$0") nes        Rename matching title \"png\" files to the rom CRC
   sh $(basename "$0") -?         Display help info
   sh $(basename "$0") -png       Compress \"png\" files"
	echo ""
	exit 1
}

checkdeps

if [ $# -lt 1 ]; then
	help
fi

for rom in "$@"; do
	fullromtitle=$(basename -- "$rom")
	title="${fullromtitle%.*}"
	tid=$(crc32 "$rom")

	if [ $OS = "Windows" ]; then
		tid=$(crc32 "$rom" | sed -e 's/^0x\(.\{8\}\).*/\1/')
	fi

	case $rom in
	*.snes | *.gbc | *.nes | *.gb | *.sms | *.gen | *.gg | *.md)

		if [[ "$rom" == *.md ]]; then
			rename "$rom" "$title.gen"
			rom="$title.gen"
		fi
		rename "$title.png" "$tid.png"
		remove "$fullromtitle"
		;;
	replace)

		find . -type f -name "*_*.png" -print0 | while IFS= read -r -d '' file; do
			if [ -f "$file" ]; then
				echo "#  Renaming '$file'"
				mv "$file" "$(echo $file | sed "s/\_/\&/g")"
			fi
		done
		exit 1
		;;
	png)
		[ ! -d "optimized" ] && mkdir -p optimized
		for cover in *.png; do
			optipng -o7 -quiet -keep -preserve -dir optimized "$cover"
		done
		exit 1
		;;
	resize | -r)
		echo "############################################################################################"
		echo "#"
		for boxart in *.png; do

			if [ $OS = "Windows" ]; then
				ndssize=$($imagemagick/identify -format "%wx%h" "$boxart")
				resizer=$($imagemagick/convert "$boxart" -resize 128x115! "$boxart")
			else
				ndssize=$(identify -format "%wx%h" "$boxart")
				resizer=$(convert "$boxart" -resize 128x115! "$boxart")
			fi
			if [ "$ndssize" != "128x115" ]; then
				echo "#  Resizing $boxart"
				$resizer
			fi

		done
		echo "#"
		echo "############################################################################################"
		exit 1
		;;
	'-?' | -h | -help)
		help
		;;
	esac
done