Class: BomDB::Diff::Dwdiff

Inherits:
Object
  • Object
show all
Defined in:
lib/bomdb/diff/dwdiff.rb

Overview

This wraps the command-line tool, dwdiff See linux.die.net/man/1/dwdiff

Instance Method Summary collapse

Constructor Details

#initialize(bin = '/usr/local/bin/dwdiff') ⇒ Dwdiff

Returns a new instance of Dwdiff.



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# File 'lib/bomdb/diff/dwdiff.rb', line 8

def initialize(bin = '/usr/local/bin/dwdiff')
  @bin = bin
end

Instance Method Details

#diff(str1, str2) ⇒ Object 



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# File 'lib/bomdb/diff/dwdiff.rb', line 12

def diff(str1, str2)
  Dir.mktmpdir("bomdb") do |dir|
    file1 = File.join(dir, "file1.txt")
    file2 = File.join(dir, "file2.txt")
    File.open(file1, "w"){ |f1| f1.write(str1) }
    File.open(file2, "w"){ |f2| f2.write(str2) }
    # -w : start-delete marker, {-
    # -x : end-delete marker,   -}
    # -y : start-insert marker, {+
    # -z : end-insert marker,   +}
    # -P : use punctuation characters as delimiters
    `#{@bin} -w'{-' -x'-}' -y'{+' -z'+}' -P #{file1} #{file2}`
  end
end