copy large files in Rev on Mac

[Ian Wood]

On 5 Dec 2007, at 12:18, Klaus Major wrote:

> revCopyFile uses Applescrip which is blocking! At least in Rev, but  
> NOT when
> using the same script with the AppleScriptEditor!? :-/
> Using "shell" is also blocking!

This has come up a few times on the list, and basically revolves  
around using a shell command that sends it's output to a text file  
instead of back to Rev.

Rev carries on because as far as it's concerned the shell command has  
finished, then you can do some kind of loop checking the output text  
file, without blocking.

On 14 Aug 2006, at 09:48, Brian Yennie wrote:

> You might try something like:
>
> get shell("mylongcommand > output.txt &")
>
> This should redirect the output to a file and return immediately.  
> It's not as clean as triggering a "done" message with new syntax  
> would be, but it may be workable. You might try searching the  
> archives - I seem to recall discussing this one many moons ago...

And:

On 12 Nov 2006, at 23:52, Sarah Reichelt wrote:

> function checkPing pIP
>   put specialFolderPath("Desktop") & "/ping.txt" into tFileName
>   if there is a file tFileName then delete file tFileName
>
>   put "ping -c1 -n "  & pIP into tShellCmd
>   put " > " & tFileName & " 2>&1 &" after tShellCmd
>   get shell(tShellCmd)
>
>   put 0 into timeCheck
>   repeat 50 times
>       add 1 to timeCheck
>       wait 1 tick with messages
>       if there is a file tFileName then
>           put URL ("file:" & tFileName) into tRes
>           if tRes is empty then next repeat  -- file created but no  
> result yet
>
>           put wordOffset("loss", tRes) into tWord
>           if tWord = 0 then next repeat -- file created but result
> not complete
>
>           -- if there is a file tFileName then delete file tFileName
>           put word tWord-2 of tRes into tPercent
>           if tPercent = "0%" then return true
>           else return false
>       end if
>   end repeat
>
>   if there is a file tFileName then delete file tFileName
>   return false
> end checkPing

Ian