Grab a PNG of any local Mac app icon

geticonpng.bash

#!/bin/bash

# get any app's full-size icon, PNG version
function geticonpng() {
	# Autocompletes app names with modified .app_completions scripts
	APP=`echo $1|sed -e 's/\.app$//'`
	APPDIR=''
	for dir in "/Applications/" "/Applications/Setapp/" "/Applications/Utilities/" "/Users/ttscoff/Applications/" "/Developer/Applications/" "/Developer/Applications/Utilties/" "/System/Applications/"; do
		if [[ -d "${dir}$APP.app" ]]; then
			APPDIR="$dir"
			break
		elif [[ -d "${dir}${APP}.localized/$APP.app" ]]; then
			APPDIR="${dir}$APP.localized/"
			break
		fi
	done
	if [[ $APPDIR == '' ]]; then
		echo "App not found"
	else
		ICON=`defaults read "${APPDIR}$APP.app/Contents/Info" CFBundleIconFile|sed -e 's/\.icns$//'`
		TMPFILE="${TMPDIR}${APP}_icon.png"
		OUTFILE="$HOME/Desktop/${APP}_icon.png"
		MAXAVAIL=`sips -g pixelWidth "${APPDIR}$APP.app/Contents/Resources/$ICON.icns"|tail -1|awk '{print $2}'`
		echo -n "Enter max pixel width ($MAXAVAIL): "
		read MAX
		if [[ $MAX == '' || $MAX -gt $MAXAVAIL ]]; then
			MAX=$MAXAVAIL
		fi
		/usr/bin/sips -s format png --resampleHeightWidthMax $MAX "${APPDIR}$APP.app/Contents/Resources/$ICON.icns" --out "$OUTFILE" > /dev/null 2>&1
		# /usr/local/bin/jpegtran -optimize "$TMPFILE" > "$OUTFILE"
		echo "Wrote PNG to $OUTFILE."
		echo -n 'Open in Acorn? (y/N): '
		read ANSWER
		if [[ $ANSWER == 'y' ]]; then
			open -a "Acorn.app" "$OUTFILE"
		else
			echo -n 'Copy to clipboard? (y/N): '
			read ANSWER
			if [[ $ANSWER == 'y' ]]; then
				/usr/local/bin/impbcopy "$OUTFILE"
				echo "Image in clipboard"
			fi
		fi
	fi
}

geticonpng $@