Contents

#!/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")

Version data entries

4 entries across 4 versions & 2 rubygems

Version	Path
blacklight-spotlight-3.6.0.beta8	vendor/bundle/ruby/3.2.0/gems/ruby-vips-2.2.1/example/revalidate.rb
ruby-vips-2.2.2	example/revalidate.rb
ruby-vips-2.2.1	example/revalidate.rb
ruby-vips-2.2.0	example/revalidate.rb