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docuseal/vendor/bundle/ruby/4.0.0/gems/ruby-vips-2.3.0/example/revalidate.rb

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885 B

#!/usr/bin/ruby
# demo the "revalidate" feature in libvips 8.15
require "fileutils"
require "vips"
if ARGV.length != 2
puts "usage: ./revalidate.rb IMAGE-FILE-1 IMAGE-FILE-2"
exit 1
end
if File.exist?("fred")
puts "file 'fred' exists, delete it first"
exit 1
end
puts "copying #{ARGV[0]} to fred ..."
FileUtils.cp(ARGV[0], "fred")
image1 = Vips::Image.new_from_file("fred")
puts "fred.width = #{image1.width}"
puts "copying #{ARGV[1]} to fred ..."
FileUtils.cp(ARGV[1], "fred")
puts "plain image open ..."
image2 = Vips::Image.new_from_file("fred")
puts "fred.width = #{image2.width}"
puts "opening with revalidate ..."
image2 = Vips::Image.new_from_file("fred", revalidate: true)
puts "fred.width = #{image2.width}"
puts "opening again, should get cached entry ..."
image2 = Vips::Image.new_from_file("fred")
puts "fred.width = #{image2.width}"
File.delete("fred")