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1. class to parse bash variable from a script

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   This class allow you to parse variable in a bash script from ruby . It retourn an array of variables. bash array is also saved as ruby array.

    1 #!/usr/bin/ruby
    2 #
    3 # how to use it :
    4 # ovars=EnvBash.new(file)
    5 # bash_vars=ovars.vars
    6 #
    7 
    8 
    9 class MultiRegexp < Regexp
   10     def matches(str)
   11         str.scan(self) do
   12           yield Regexp.last_match
   13         end
   14     end
   15 end
   16 
   17 
   18 class EnvBash
   19 	attr_reader :bash_env
   20 
   21 	def initialize(source)
   22 			bash_script ="\
   23 source #{source}
   24 set
   25 "			
   26 			@bash_env = `#{bash_script}`
   27 	end
   28 
   29 	def vars
   30 		bvars=Hash.new
   31 		re=MultiRegexp.new('(\w*)=(.*)$', true)
   32 		re.matches(@bash_env) { |i|
   33 			if (i[1] != "")
   34 				if i[2] =~ /\(([^\)]*)\)/
   35 					ta=Array.new
   36 					re_a=MultiRegexp.new('\[\d*\]=\"([^"]*)\"', true)
   37 					re_a.matches($1) { |j|
   38 						ta.push(j[1])
   39 					}
   40 					bvars[i[1]]=ta
   41 				elsif
   42 					bvars[i[1]]=i[2]
   43 				end
   44 			end
   45 		}
   46 		return bvars
   47 	end
   48 end
   49 
   50 # test on a pkgbuild (archlinux)
   51 bashvars=EnvBash.new("/var/abs/kernels/kernel26/PKGBUILD")
   52 
   53 bvars=bashvars.vars
   54         puts "#{bvars['pkgname']}-#{bvars['pkgver']}-#{bvars['pkgrel']}"
   55 
   56 if bvars['source'].instance_of?(Array)
   57     puts "sources : "
   58     bvars['source'].each { |src|
   59         puts src
   60     }
   61 end
   

   Posted by enki to ruby bash variables parser ... saved by 1 person ... 0 comments ... 1 year

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