Module: DR::SimpleParser

Extended by:
SimpleParser
Included in:
SimpleParser
Defined in:
lib/drain/parse/simple_parser.rb

Overview

utilities to parse some strings into name values

Instance Method Summary collapse

Instance Method Details

#parse_namevalue(nameval, sep: ':', default: nil) ⇒ Object

takes a string 'name:value' and return name and value can specify a default value; if the default is true we match no-name as name:false



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# File 'lib/drain/parse/simple_parser.rb', line 9

def parse_namevalue(nameval, sep: ':', default: nil)
  name,*val=nameval.split(sep)
  if val.empty?
    if default == true
      #special case where if name begins by no- we return false
      if name =~ /^no-(.*)$/
        return $1, false
      else
        return name, true
      end
    else
      return name, default
    end
  else
    value=val.join(sep)
    return name,value
  end
end

#parse_string(s) ⇒ Object

takes a string as "name:value!option1=ploum!option2=plam,name2:value2!!globalopt=plim,globalopt2=plam" and return the hash {name: value, name2: value2, localopt: {option1:ploum,option2:plam}, globalopt: plim, globalopt2: plam, opt: {option1:ploum,option2:plam,globalopt: plim, globalopt2: plam, name2:plim, globalopt2: plam}}



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# File 'lib/drain/parse/simple_parser.rb', line 34

def parse_string(s)
  r={values: {}, local_opts: {}, global_opts: {}, opts: {}}
  args,*globopts=s.split('!!')
  globopts.map {|g| g.split(',')}.flatten.each do |g|
    name,value=parse_namevalue(g, sep: '=', default: true)
    r[:global_opts][name]=value
  end
  args.split(',').each do |arg|
    arg,*localopts=arg.split('!')
    name,value=parse_namevalue(arg)
    r[:values][name]=value
    r[:local_opts][name]={}
    localopts.each do |o|
      oname,ovalue=parse_namevalue(o, sep: '=', default: true)
      r[:local_opts][name][oname]=ovalue
    end
    r[:local_opts].each do |name,hash|
      r[:opts][name]=r[:local_opts][name].dup
      r[:global_opts].each do |k,v|
        r[:opts][name][k]||=v
      end
    end
  end
  return r
end