makeapp.sh

#!/bin/sh

echo "What should the Application be called (no spaces allowed e.g. GCal)?"
read inputline
name=$inputline

echo "What is the url (e.g. https://www.google.com/calendar/render)?"
read inputline
url=$inputline

echo "What is the full path to the icon (e.g. /Users/username/Desktop/icon.png)?"
read inputline
icon=$inputline




chromePath="/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome"
appRoot="/Applications"



# various paths used when creating the app
resourcePath="$appRoot/$name.app/Contents/Resources"
execPath="$appRoot/$name.app/Contents/MacOS" 
profilePath="$appRoot/$name.app/Contents/Profile"
plistPath="$appRoot/$name.app/Contents/Info.plist"

# make the directories
mkdir -p  $resourcePath $execPath $profilePath

# convert the icon and copy into Resources
if [ -f $icon ] ; then
    sips -s format tiff $icon --out $resourcePath/icon.tiff --resampleHeightWidth 128 128 >& /dev/null
    tiff2icns -noLarge $resourcePath/icon.tiff >& /dev/null
fi

# create the executable
cat >$execPath/$name <<EOF
#!/bin/sh
exec $chromePath  --app="$url" --user-data-dir="$profilePath" "\$@"
EOF
chmod +x $execPath/$name

# create the Info.plist 
cat > $plistPath <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" “http://www.apple.com/DTDs/PropertyList-1.0.dtd”>
<plist version=”1.0″>
<dict>
<key>CFBundleExecutable</key>
<string>$name</string>
<key>CFBundleIconFile</key>
<string>icon</string>
</dict>
</plist>
EOF

It's great. The weak point is the app opens as a Google Chrome (although the dock name is by your choice).
That makes a problem when you launch your "app" before Chrome (or need to restart it). Launching Chrome will just focus your "app" instead of launching the Chrome. So you must close your "app", launch Chrome, and launch your "app" again.

This works really well. Thank you.
One question, how does one uninstall a created app. \ It doesn't seem to appear in the "Apps" menu.

Thanks