Class: CliUtils

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(utility) ⇒ CliUtils

Returns a new instance of CliUtils.



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# File 'lib/cli_utils.rb', line 6

def initialize(utility)
  @utility = utility
  @utility_path
  @version
  valid?
end

Instance Attribute Details

#utility ⇒ Object

Returns the value of attribute utility.



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# File 'lib/cli_utils.rb', line 4

def utility
  @utility
end

#utility_path ⇒ Object

Returns the value of attribute utility_path.



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# File 'lib/cli_utils.rb', line 4

def utility_path
  @utility_path
end

Instance Method Details

#find_utility ⇒ Object 



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# File 'lib/cli_utils.rb', line 19

def find_utility
  cmd = "which #{@utility}"
  ph = IO.popen(cmd)
  output = ph.readlines()
  ph.close
  if($? != 0)
    puts "Cannot find required utility #{@utility} in path."
    false
  else
    @utility_path = output[0].chomp
  end
end

#get_version ⇒ Object 



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# File 'lib/cli_utils.rb', line 32

def get_version
  version = Array.new
  if(@utility_path == nil)
    find_utility
  end
  cmd = "#{@utility_path} --version"
  Open3.popen2e(cmd) { |i,oe,t|
    oe.each do |line|
      version.push(line)
    end
  }

  @version = version.to_s
end

#supp_util_versions ⇒ Object 



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# File 'lib/cli_utils.rb', line 47

def supp_util_versions
  case @utility
  when "rsync"
    supp_version = 3
    version_pattern.match(@version)
    if($1.to_s < supp_version.to_s)
      puts "Unsupported version of 'rsync', use version #{supp_version} or higher."
      false 
    else
      true
    end
  end
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cli_utils.rb', line 13

def valid?
  find_utility
  get_version
  supp_util_versions
end

#version_pattern ⇒ Object 



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# File 'lib/cli_utils.rb', line 61

def version_pattern
  case @utility
  when "rsync"
    Regexp.new(/rsync  version ([\d\.]+)  protocol version (\d+)/)
  else
    puts "Not a supported utility: #{utility}"
    exit 1
  end
end