🚀 go-pugleaf

This JavaScript will do the job. I posted it once before with some logic that allowed it to work on a copy of the active document, but it seems that what I did to achieve that was platform dependent.

This script will work on either Mac or PC. Just use a text editor to save it with a .js extension in your Scripts folder. I advise running it on a copy of your document. The document must be an exact multiple of four pages and it must be set up with Facing Pages. When the script finishes, the pages will have been shuffled into printer spreads which you can print or export to PDF with the Spreads option checked.

The script makes no allowance for items that cross the binding. You'll have to check for such occurrences and deal with them yourself. Still, this should tide people over until something better comes along.

Dave

//DESCRIPTION: Minimalist Build Booklet

myPages = app.documents[0].pages;

// Let's make sure that the pages are a multiple of four
app.documents[0].documentPreferences.allowPageShuffle = false;

if (Math.round(myPages.length/4)*4 != myPages.length) {
	alert("Document length isn't a multiple of four.");
	exit();
}

	for (i=0; i<myPages.length; i++) {
		newSection = app.documents[0].sections.add(undefined,undefined,{pageStart:app.documents[0].pages[i],continueNumbering:false,pageNumberStart:(i+1)});
	}
	app.documents[0].documentPreferences.allowPageShuffle = true;

	for (i=0; i<(myPages.length/2); i++){
		if (isEven(i)) {
			app.documents[0].pages[myPages.length - 1].move(LocationOptions.before,app.documents[0].pages[i*2],BindingOptions.leftAlign);
	} else {
			app.documents[0].pages[myPages.length - 1].move(LocationOptions.after,app.documents[0].pages[i*2],BindingOptions.rightAlign);
	}
}

function isEven(n) {
	return ((Math.round(n/2))*2 == n);
}