Size of a binary item

[Andy Drop]

Hi,

 

 i just ran in a problem, to which i see no solution

 

I have some *.WAV file which i convert to *.MP3 via a binary filter. So far no problem.

 

Now i want to include this MP3 file into an RSS Feed to create a Podcast-Feed. The enclosure Tag needs to give the size of that MP3 file.

How do i get the size of that file?

 

I could use the filesystem libs, if i would know the routed path of that output file, and if it would be sure, that the outputfile already exists, when the rss feed is created.

 

Is that sure?

Can i do something to ensure that?

 

Andy

 

 

[Denis Defreyne]

Hi Andy,

This is a situation for which nanoc doesn’t have convenience methods yet :)

In your RSS feed, you need to create a hard dependency on all the MP3 files. You’d do this by starting the RSS feed with this:

# Create dependencies
mp3_items.each do |item|
Nanoc::NotificationCenter.post(:visit_started, item)
Nanoc::NotificationCenter.post(:visit_ended, item)
end

# Require compilation
mp3_items.each do |item|
rep = item.reps.find { |r| !r.compiled? }
raise Nanoc::Errors::UnmetDependency.new(rep) if rep
end

(Assuming mp3_items contains all items included in the RSS feed.)

I’ll see about adding a much nicer built-in way of doing this in nanoc by default!

Denis

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