require 'tempfile'

require 'subexec'

require 'stringio'

require 'pathname'

require 'shellwords'

require 'mini_magick/command_builder'

require 'mini_magick/errors'

require 'mini_magick/image'

require 'mini_magick/utilities'

module MiniMagick

@validate_on_create = true

@validate_on_write = true

class << self

attr_accessor :processor

attr_accessor :processor_path

attr_accessor :timeout

attr_accessor :validate_on_create

attr_accessor :validate_on_write

##

# Tries to detect the current processor based if any of the processors exist.

# Mogrify have precedence over gm by default.

#

# === Returns

# * [String] The detected procesor

def choose_processor

self.processor = if MiniMagick::Utilities.which('mogrify')

"mogrify"

elsif MiniMagick::Utilities.which('gm')

"gm"

else

nil

end

end

##

# Discovers the imagemagick version based on mogrify's output.

#

# === Returns

# * The imagemagick version

def image_magick_version

@@version ||= Gem::Version.create(`mogrify --version`.split(" ")[2].split("-").first)

end

##

# The minimum allowed imagemagick version

#

# === Returns

# * The minimum imagemagick version

def minimum_image_magick_version

@@minimum_version ||= Gem::Version.create("6.6.3")

end

##

# Checks whether the imagemagick's version is valid

#

# === Returns

# * [Boolean]

def valid_version_installed?

image_magick_version >= minimum_image_magick_version

end

##

# Picks the right processor if it isn't set and returns whether it's mogrify or not.

#

# === Returns

# * [Boolean]

def mogrify?

self.choose_processor if self.processor.nil?

self.processor == 'mogrify'

end

##

# Picks the right processor if it isn't set and returns whether it's graphicsmagick or not.

#

# === Returns

# * [Boolean]

def gm?

self.choose_processor if self.processor.nil?

self.processor == 'gm'

end

end

end