I have a script that does things to large files > 1Gb and I want to be
able to show the percentage through the current file.
I know exactly how I will get the percentage, but I want to know how to
display it in the terminal.
What I would like is the name of the current file, then on the next
line, "currentbytes/totalbytes [xx%]" and I want it to update the
characters in place without writing hundreds of lines to the terminal.
I think I want to be able to position the cursor back to the beginning
of the current line but I have no idea how to do this in ruby.
Grateful for any ideas
Thanks
Matt
Matt Harrison wrote:
I have a script that does things to large files > 1Gb and I want to be
able to show the percentage through the current file.
I know exactly how I will get the percentage, but I want to know how to
display it in the terminal.
What I would like is the name of the current file, then on the next
line, "currentbytes/totalbytes [xx%]" and I want it to update the
characters in place without writing hundreds of lines to the terminal.
I think I want to be able to position the cursor back to the beginning
of the current line but I have no idea how to do this in ruby.
Grateful for any ideas
Thanks
Matt
You can use curses with Ruby to do what you want. Otherwise if you can figure out how to get Ruby to properly handle the CR character that may be a simpler way. I am not sure how to get Ruby to print a character without interpreting it -- i.e. print 0xa prints 10 instead of a carriage return.
-------- Original-Nachricht --------
Datum: Wed, 20 Aug 2008 07:20:58 +0900
Von: Matt Harrison <iwasinnamuknow@genestate.com>
An: ruby-talk@ruby-lang.org
Betreff: overprinting characters
I have a script that does things to large files > 1Gb and I want to be
able to show the percentage through the current file.
I know exactly how I will get the percentage, but I want to know how to
display it in the terminal.
What I would like is the name of the current file, then on the next
line, "currentbytes/totalbytes [xx%]" and I want it to update the
characters in place without writing hundreds of lines to the terminal.
I think I want to be able to position the cursor back to the beginning
of the current line but I have no idea how to do this in ruby.
Grateful for any ideas
Thanks
Matt
Dear Matt,
try this:
"puts" without line feed - Ruby - Ruby-Forum (I think you want the last post's behaviour).
Best regards,
Axel
···
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In addition to print "\r" you might want to look at the docs for ProgressBar
http://raa.ruby-lang.org/project/progressbar/
I can't remember where I used this or I'd drop an example in here, but it gives to a bar similar to what sftp or curl shows on downloads (it even gives a time to complete estimate).
-Rob
Rob Biedenharn http://agileconsultingllc.com
Rob@AgileConsultingLLC.com
···
On Aug 19, 2008, at 6:20 PM, Matt Harrison wrote:
I have a script that does things to large files > 1Gb and I want to be
able to show the percentage through the current file.
I know exactly how I will get the percentage, but I want to know how to
display it in the terminal.
What I would like is the name of the current file, then on the next
line, "currentbytes/totalbytes [xx%]" and I want it to update the
characters in place without writing hundreds of lines to the terminal.
I think I want to be able to position the cursor back to the beginning
of the current line but I have no idea how to do this in ruby.
Grateful for any ideas
Thanks
Matt
Rob Biedenharn wrote:
I have a script that does things to large files > 1Gb and I want to be
able to show the percentage through the current file.
I know exactly how I will get the percentage, but I want to know how to
display it in the terminal.
What I would like is the name of the current file, then on the next
line, "currentbytes/totalbytes [xx%]" and I want it to update the
characters in place without writing hundreds of lines to the terminal.
I think I want to be able to position the cursor back to the beginning
of the current line but I have no idea how to do this in ruby.
Grateful for any ideas
Thanks
Matt
In addition to print "\r" you might want to look at the docs for
ProgressBar
http://raa.ruby-lang.org/project/progressbar/
I can't remember where I used this or I'd drop an example in here, but
it gives to a bar similar to what sftp or curl shows on downloads (it
even gives a time to complete estimate).
-Rob
Excellent, first I managed to get it working as I said in my post,
thanks to Axel's link. Now I am trying the progress bar as Rob
suggested. It's good but I can't work out how the format is used.
I'm trying to expand the amount of text displayed in the title so I can
see the entire file and path.
Any extra help is appreciated but thanks for what you've done so far 
Matt
···
On Aug 19, 2008, at 6:20 PM, Matt Harrison wrote:
OK, here's the context: getting CSV files from a url and saving them locally
begin
File.open(csvfile, 'w') do |csvout|
pbar = nil
pbar_options = $stdout.tty? ? {
:content_length_proc => lambda {|t|
if t && 0 < t
pbar = ProgressBar.new(csvfile, t)
pbar.file_transfer_mode
end
},
:progress_proc => lambda {|s|
pbar.set s if pbar
},
} : { }
open(url, pbar_options) do |csvurl|
csvout.write csvurl.read
end
end # unless File.exist?(csvfile)
rescue => e
puts "\n** #{e}; #{e.message}"
puts " skipping file"
next
end
(I'm not boring you with all the setup to figure out the url and the subsequent processing of the CSV data into a database.)
-Rob
Rob Biedenharn http://agileconsultingllc.com
Rob@AgileConsultingLLC.com
···
On Aug 19, 2008, at 7:45 PM, Matt Harrison wrote:
In addition to print "\r" you might want to look at the docs for
ProgressBar
http://raa.ruby-lang.org/project/progressbar/
I can't remember where I used this or I'd drop an example in here, but
it gives to a bar similar to what sftp or curl shows on downloads (it
even gives a time to complete estimate).
-Rob
Excellent, first I managed to get it working as I said in my post,
thanks to Axel's link. Now I am trying the progress bar as Rob
suggested. It's good but I can't work out how the format is used.
I'm trying to expand the amount of text displayed in the title so I can
see the entire file and path.
Any extra help is appreciated but thanks for what you've done so far
Matt