Scripting OS X with Applescript, without Applescript

Reprocessed.org » Scripting OS X with Applescript, without Applescript.

Reprocessed.org » With Ruby instead

Reprocessed.org » Hello, my name is Matt

Reprocessed.org » Why Applescript isn’t Applescript

Reprocessed.org » • Applescript is Apple’s system-level inter-process scripting system • It’s actually made of two parts: • Applescript, the language • OSA – Open Scripting Architecture – which is the plumbing • Generally, when people ask, ‘is it Applescriptable?’, they actually mean, ‘does it accept Apple Events and expose a terminology dictionary for OSA clients to use?’ Clearly, the first is shorter.

Reprocessed.org » • Applescript looks a bit like this: tell application quot;Finderquot; empty the trash end tell • All pretty simple, right? Not quite. Check these two radically different lines out: get words 1 thru 4 of quot;now is the winter of our discontentquot; get text from word 1 to 4 of quot;now is the winter of our discontentquot;

Reprocessed.org » Sort of like an API

Reprocessed.org » • You get a way to stitch all sorts of things and apps on your Mac together in all sorts of interesting ways • This is so useful that the publishing industry relies on Applescript to tie together apps and processes into the editorial workflow stuff needed to get magazines and newspapers out the door. • You can do the stitching together of lots of separate things in a single script

Reprocessed.org » Actually, mostly like IPC

Reprocessed.org » • Under the hood, its OSA which makes all this possible. OSA allows apps to send Apple Events to each other, and defines standard ways to interpret the results, so you can send data types around the place • When you iterate across things in a script, you’re not really iterating across things in memory: Script Editor (or whatever script running OSA runtime you’re using) is firing Apple Events around the place and interpreting the results

Reprocessed.org » It’s a query

Reprocessed.org » • What’s actually going on is more like SQL... • So, lets have a look...

Reprocessed.org » Demo time...

Reprocessed.org » The english- likeness monster

Reprocessed.org » • As we’ve already seen, the english-likeness of Applescript the language gets complex. Particularly for programmers. • Multi-word tokens are just plain odd, and allowing apps and scripting additions to essentially redefine parts of the language syntax doesn’t help much • John Gruber goes into this at great length here: http://daringfireball.net/2005/09/ englishlikeness_monster • So, is there a way to access the good stuff without the gut-wrenching terror?

Reprocessed.org » Enter rb- appscript / Watch OSA surface from the depths

Reprocessed.org » • Since Applescript is layered on top of OSA, in theory you could just use a different OSA runtime. • For once, theory ≈ practice... • There are low-level Apple Event modules for most dynamic languages, and for Python and Ruby, Hamish Sanderson has given us Appscript, which gives us a nice abstraction layer over the guts which actually makes use of those terminology dictionaries... • See http://appscript.sourceforge.net/ for the full story

Reprocessed.org » • Appscript takes away the pain of english-likeness by giving us a consistent interface and making a lot of the voodoo implicit stuff explicit • Believe me, you’ll appreciate this. • Appscript code looks a bit like this: app('TextEdit').documents['Read Me']. paragraphs[1].get() • As opposed to: tell application quot;TextEditquot; get paragraph 1 of document quot;Read Mequot; end tell

Reprocessed.org » Munging phone numbers in Address Book

Reprocessed.org » • The critical bits: Appscript::app('Address Book'). app.people.phones.get() => [a, bunch, of, number, objects] number = phone.value.get() phone.value.set(number)

Reprocessed.org » Demo time...

Reprocessed.org » Questions?

Reprocessed.org » Thank you matt@reprocessed.org http://reprocessed.org/ Some code from Matt Neuberg’s excellent Applescript: The Definitive Guide, published by O’Reilly

Scripting OS X with Applescript, without Applescript

by Matt Patterson on Nov 26, 2007

Accessibility

Categories

Tags

Upload Details

Usage Rights

Statistics

Scripting OS X with Applescript, without Applescript — Presentation Transcript