Inspec Custom Matcher

gdal_translate.rb

require 'net/http'
require 'fileutils'

class GdalTranslate < Inspec.resource(1)
  name 'gdal_translate'

  def initialize(remote_file)
    uri = URI.parse(remote_file)
    @response = Net::HTTP.get(uri)
    @filename = File.basename(uri.path)
  end

  def tiff_to_png
    tempdir = Dir.mktmpdir
    tempfile = File.join(tempdir, @filename)

    File.open(tempfile, "wb") do |file|
      file.write(@response)
    end

    cmd = inspec.command "gdal_translate -of PNG #{tempfile} #{tempfile}.tif"
    result = cmd.result

    FileUtils.remove_entry_secure(tempdir)

    result
  end
end