Module: Julia::LibJulia::Finder

Defined in:
lib/julia/libjulia/finder.rb

Constant Summary collapse

LIBPREFIX = 
libprefix || 'lib'
LIBSUFFIX = 
libsuffix || 'so'
DEFAULT_JULIA = 
-'julia'

Class Method Summary collapse

Class Method Details

.find_libjulia(julia = nil) ⇒ Object

Raises:



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# File 'lib/julia/libjulia/finder.rb', line 24

def find_libjulia(julia = nil)
  debug_report "find_libjulia(#{julia.inspect})"
  julia_cmd, julia_config = investigate_julia(julia)

  libpath = File.join(julia_config[:libdir], "libjulia.#{LIBSUFFIX}")
  if File.file? libpath
    begin
      return dlopen(libpath)
    rescue Fiddle::DLError
      debug_report "#{$!.class}: #{$!.message}"
    else
      debug_report "Success to dlopen #{fullname}"
    end
  else
    debug_report "Unable to find #{fullname}"
  end

  raise Julia::JuliaNotFound
end

.investigate_julia(julia = nil) ⇒ Object 



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# File 'lib/julia/libjulia/finder.rb', line 44

def investigate_julia(julia = nil)
  julia ||= DEFAULT_JULIA
  Array(julia).each do |julia_cmd|
    julia_config = run_julia_investigator(julia_cmd)
    return [julia_cmd, julia_config] unless julia_config.empty?
  end
rescue
  debug_report "investigate_julia: (#{$!.class}) #{$!.message}"
  raise Julia::JuliaNotFound
else
  raise Julia::JuliaNotFound
end

.julia_investigator_jl ⇒ Object 



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# File 'lib/julia/libjulia/finder.rb', line 76

def julia_investigator_jl
  File.expand_path('../investigator.jl', __FILE__)
end

.run_julia_investigator(julia_cmd) ⇒ Object 



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# File 'lib/julia/libjulia/finder.rb', line 57

def run_julia_investigator(julia_cmd)
  debug_report "run_julia_investigator(#{julia_cmd})"
  IO.popen({}, [julia_cmd, julia_investigator_jl], 'r') do |io|
    {}.tap do |config|
      io.each_line do |line|
        next unless line =~ /: /
        key, value = line.chomp.split(': ', 2)
        case value
        when 'true', 'false'
          value = (value == 'true')
        end
        config[key.to_sym] = value if value != 'nothing'
      end
    end
  end
rescue Errno::ENOENT
  raise Julia::JuliaNotFound
end