javascript-automation

I would like to start a subprocess in JavaScript for Automation (JXA) and send a string to that subprocess's stdin which might include newlines, shell metas, etc. Previous AppleScript approaches for this used bash's <<< operator, string concatenation, and quoted form of the string. If there was a JavaScript equivalent of quoted form of that I could trust to get all of the edge cases, I could use the same approach; I'm investigating regex methods toward that end. However, I thought since we have access to unistd.h from JXA, why not try to just call $.pipe , $.fork , and $.execlp directly? $

How is it possible to listen for events in OS X JavaScript for automation. In the scripting Library for the Messages application there is a list of event handlers, such as messageSent and messageReceived . However, I cannot figure out how to use them. Trying to pass a function yields an error, and trying to set these variables to new functions causes the REPL to hang. What is the proper way to set up these event handlers? You would create a script that you then select from the AppleScript handler menu in Preferences > General . Use the built-in Speak Events.applescript file as your guide and

JXA , with its built-in ObjC bridge, exposes enumeration and constants from the Foundation framework automatically via the $ object; e.g.: $.NSUTF8StringEncoding // -> 4 However, there are also useful CFString constants in lower-level APIs that aren't automatically imported, namely the kUTType* constants in CoreServices that define frequently-used UTI values, such as kUTTypeHTML for UTI "public.html" . While you can import them with ObjC.import('CoreServices') , their string value isn't (readily) accessible, presumably because its type is CFString[Ref] : ObjC.import('CoreServices') // import