Apple - Run AppleScript from bash script

The argument for osascript -e can contain newlines:

osascript -e 'set x to "a"
say x'

You can also specify multiple -e arguments:

osascript -e 'set x to "a"' -e 'say x'

Or if you use a heredoc, bash interprets three characters (\, $, and `) between <<END and END but no characters between <<'END' and END.

osascript <<'END'
set x to "a"
say x
END

Edit:

Since osascript can operate with a heredoc (ie take input from /dev/stdin) then one can just write the script as a whole file and prepend with the correct shebang line:

#!/usr/bin/env osascript

set x to "a"
say x

This also allows you to save your apple script as a actual program in ~/Applications/.app using the following procedure (changing for your script's name):

mkdir -p ~/Applications/<APP_NAME>.app/Contents/MacOS
touch ~/Applications/<APP_NAME>.app/Contents/MacOS/<APP_NAME>
open -A TextEdit ~/Applications/<APP_NAME>.app/Contents/MacOS/<APP_NAME>

Ensure that both the script file in .../MacOS/ and the matches

You can wrap the raw AppleScript in <<EOD... The last EOD signalling the end of input has to come at the first position in the line.

(BTW, your applescript seemed to be missing an end tell after activate....)

#!/bin/bash
osascript <<EOD
  tell application "Google Chrome"
      activate
  end tell
  tell application "System Events"
      key down {command}
      key down {shift}
      keystroke "f"
      key up {shift}
      key up {command}
  end tell
EOD

echo "Google Chrome is now open in Kiosk Mode"