Re: Being notified of changes to a file
Re: Being notified of changes to a file
- Subject: Re: Being notified of changes to a file
- From: Yann Disser <email@hidden>
- Date: Mon, 21 Jul 2008 09:56:09 +0200
Thanks for your reply.
Hmm, the subject is rather ill chosen. (I started to write the mail
and then looked a little more into NSPipe before finishing it) My
script actually writes to stdout.
What I am trying to figure out, is how to respond right away to every
single line that is written on stdout without waiting for the process
to be finished.
Perhaps I got something wrong...
Thanks,
Yann
On 21. Jul 2008, at 0:38, Jens Alfke wrote:
On 20 Jul '08, at 9:37 AM, Yann Disser wrote:
I am trying to execute a ruby script from within a Cocoa
application. I want to use NSTask (any better ideas?).
You can use the Ruby C API to run Ruby inside your process, but
that's definitely more work.
My scripts outputs its progress by printing single lines on
standard out containing percentages (e.g. "15%"). How can I update
my application continuously depending on that progress? (for
progress bars and other output)
Your subject implies you're writing to a file; don't do that. The
Ruby script should write to stdout, and you app should hook up an
NSPipe to the NSTask to read its output directly. (This can be a bit
tricky, but there's Apple sample code that shows how to do it.)
—Jens
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