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require 'digest/sha1'

module Nanoc3::DataSources

class Static < Nanoc3::DataSource

identifier :static

def items

# Get prefix

prefix = config[:prefix] || 'static'

# Get all files under prefix dir

filenames = Dir[prefix + '/**/*'].select { |f| File.file?(f) }

# Convert filenames to items

filenames.map do |filename|

attributes = {

:extension => File.extname(filename)[1..-1],

:filename => filename,

}

identifier = filename[(prefix.length+1)..-1] + '/'

mtime = File.mtime(filename)

checksum = checksum_for(filename)

Nanoc3::Item.new(

filename,

attributes,

identifier,

:binary => true, :mtime => mtime, :checksum => checksum

)

end

end

private

# Returns a checksum of the given filenames

# TODO un-duplicate this somewhere

def checksum_for(*filenames)

filenames.flatten.map do |filename|

digest = Digest::SHA1.new

File.open(filename, 'r') do |io|

until io.eof

data = io.readpartial(2**10)

digest.update(data)

end

end

digest.hexdigest

end.join('-')

end

end

end