appify — create the simplest possible Mac app from a shell script

appify

#!/bin/bash

if [ "$1" = "-h" -o "$1" = "--help" -o -z "$1" ]; then cat <<EOF
appify v3.0.1 for Mac OS X - http://mths.be/appify
Creates the simplest possible Mac app from a shell script.

Appify takes a shell script as its first argument:

    `basename "$0"` my-script.sh

Note that you cannot rename appified apps. If you want to give your app
a custom name, use the second argument:

    `basename "$0"` my-script.sh "My App"

Copyright (c) Thomas Aylott <http://subtlegradient.com/>
Modified by Mathias Bynens <http://mathiasbynens.be/>
EOF
exit; fi

APPNAME=${2:-$(basename "$1" ".sh")}
DIR="$APPNAME.app/Contents/MacOS"

if [ -a "$APPNAME.app" ]; then
	echo "$PWD/$APPNAME.app already exists :("
	exit 1
fi

mkdir -p "$DIR"
cp "$1" "$DIR/$APPNAME"
chmod +x "$DIR/$APPNAME"

echo "$PWD/$APPNAME.app"

On an ARM64 Mac, it kept prompting me to install Rosetta; adding the LSArchitecturePriority to the /Contents/Info.plist seems to work (although this is cached somehow, so I had to change the CFBundleIdentifier to get Rosetta to check again):

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleExecutable</key>
	<string>run</string>
	<key>CFBundleIdentifier</key>
	<string>com.testing</string>
	<key>LSArchitecturePriority</key>
	<array>
		<string>arm64</string>
	</array>
	<key>LSRequiresNativeExecution</key>
	<true/>
</dict>
</plist>