From: Randy Lawrence <jm@...>
Date: 2004-07-11T00:08:49+09:00
Subject: Re: Ruby Snapshot Notifier

daz wrote:

[snip]
> 
> 
> If it would save some of Matz' valuable bandwith, it's worth doing.
> All you need to do is run this, then find out why it didn't do
> what I expected on your machine. :)
> 
> File.utime isn't universally available (according to PickAxe I).
> That often means "Windows has no chance", but it works for me.
> 
> 
> daz
> 
> 
> 
> #---------------------------------------------------------------
> # <ftp_snap.rb> -DfB-  2004/07/10
> # Download stable-snapshot only if updated
> 
> ftp_site = 'ftp.iij.ad.jp'  # ftp.ruby-lang.org mirror
> fn_snap  = 'stable-snapshot.tar.gz'   #  1.8.x
> 
> ################################################
> # Download to site-ruby/stable-snapshot.tar.gz #
> ################################################
> require 'rbconfig'
> fn_snap_save = File.join(Config::CONFIG['sitedir'], fn_snap)
> # fn_snap_save = 'some.other'
> 
> #---------------------------------------------------------------
> $stdout.sync = true
> 
> # [Y,M,D,h,m] to Time
> def pdt_to_time(pdt, now = Time.now)
>   unless pdt[1,4].compact.size==4
>     raise "#{pdt[1,4].inspect} ... expected [M, D, h, m]"
>   end
>   pdt[0] ||= now.year                # assume year
>   pdt[0] -= 1 if pdt[1] > now.month  # last year ?
>   Time.utc(*pdt[0,5])
> end
> 
> require 'ParseDate'
> require 'net/ftp'
> 
> ftp = Net::FTP.open(ftp_site)
> END { ftp.close unless ftp.closed? }
> ftp.login
> ##
> ftp.chdir('/pub/lang/ruby')
> fline = ftp.list(fn_snap)
> if fline.empty?
>   ftp.chdir('/pub/ruby')
>   fline = ftp.list(fn_snap)
> end
> unless fline.size==1
>   puts '+++', fline, '+++'
>   raise "Multiple, or no files match \"#{fn_snap}\""
> end
> #               <----  Jan..Dec  ---->
> fline[0] =~ /(\s[AFJMNOS][aceopu][b-y]\s.*)#{Regexp.quote(fn_snap)}\Z/
> ft = pdt_to_time(ParseDate::parsedate($1))
> ft_prev = File.exist?(fn_snap_save) ? File.mtime(fn_snap_save).utc : 0
> if ft > ft_prev
>   if ft_prev > 0
>     puts "Replacing:      #{ft_prev}"
>   else
>     puts "No previous snapshot found (first run)"
>   end
>   puts "Getting latest (#{ft}) ..."
>   ftp.getbinaryfile(fn_snap, fn_snap_save, 1024)
>   File.utime(ft, ft, fn_snap_save)
> else
>   puts "Existing snapshot is current"
> end
> 
> 
> 

You are much to kind.  Thank you very much!

Aside from the functionality, it is good for ruby beginners like me to 
see other people's ruby coding style.