Class: JekyllImagemagickSutermserv::ImageConvert

Inherits:
Object
  • Object
show all
Defined in:
lib/convert.rb

Overview

Class used to convert a single image to another format using imagemagick

Class Method Summary collapse

Class Method Details

.run(input_file, output_file, flags, long_edge, resize_flags) ⇒ Object 



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# File 'lib/convert.rb', line 26

def self.run(input_file, output_file, flags, long_edge, resize_flags)
  Jekyll.logger.info(LOG_PREFIX, "Generating image \"#{output_file}\"")

  cmd = "convert \"#{input_file}\" #{flags} "
  if long_edge != 0
    cmd += "-resize \"#{long_edge}>\" #{resize_flags} "
  end
  cmd += "\"#{output_file}\""
  Jekyll.logger.debug(LOG_PREFIX, "Running command \"#{cmd}\"")
  run_cmd(cmd)
end

.run_cmd(cmd) ⇒ Object

Executes a command and wait for the output



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# File 'lib/convert.rb', line 7

def self.run_cmd(cmd)
  exit_code = 0
  error = ''
  output = ''
  Open3.popen3(cmd) do |stdin, stdout, stderr, wait_thr|
    stdin.close # we don't pass any input to the process
    output = stdout.gets
    error = stderr.gets
    exit_code = wait_thr.value
  end

  if exit_code != 0
    Jekyll.logger.error(LOG_PREFIX, "Command returned #{exit_code} with error #{error}")
  end

  # Return any captured return value
  return [output, error]
end