Class: Rust::Rustc

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

Overview

A Wrapper to use rustc

Constant Summary collapse

SOURCE_ANALYZER =

Path of rustc lint plugin to gather information about .rs files

Gem::Specification.find_by_name('rust_require').full_gem_path + '/ext/source_analyzer/lib/libsource_analyzer.so'
RUSTC_CMD =

default rustc command

'rustc --crate-type dylib -A dead_code -A unused_features'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ Rustc

input is a String object containing the absolute path to an input file



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# File 'lib/rust_require/rustc.rb', line 20

def initialize(input)
  @input_path = input
end

Instance Attribute Details

#info_file_path ⇒ Object

Returns the value of attribute info_file_path.



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# File 'lib/rust_require/rustc.rb', line 14

def info_file_path
  @info_file_path
end

#output_path ⇒ Object

@output_path: output path for library generated by Rustc



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# File 'lib/rust_require/rustc.rb', line 11

def output_path
  @output_path
end

#subdir=(value) ⇒ Object (writeonly)

Sets the attribute subdir

Parameters:

  • value —

    the value to set the attribute subdir to.



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# File 'lib/rust_require/rustc.rb', line 17

def subdir=(value)
  @subdir = value
end

Instance Method Details

#compile ⇒ Object

Compiles file @input_path with rustc



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# File 'lib/rust_require/rustc.rb', line 55

def compile
  print `#{RUSTC_CMD} -L #{File.dirname(@input_path)} #{@tempfile} -o #{@output_path}`
  raise "rust compiler error" if $? != 0
  `rm #{@tempfile}`
end

#create_wrapper ⇒ Object

creates a c-wrapper for file at @input_path returns info.json, parsed with JSON



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# File 'lib/rust_require/rustc.rb', line 26

def create_wrapper
  # @input_path with wrappers added
  @tempfile = "#{File.dirname(@input_path)}/#{File.basename(@input_path, ".*")}_wrapper.rs"

  analyze_tempfile

  # parse info.json
  info_file = JSON.parse File.open(@info_file_path, 'r').read

  gen = CWrapperGenerator.new(info_file)

  File.open(@tempfile, "w+") do |f|
    # add necessary extern crate definitions
    f << <<-SRC
        #![feature(alloc)]
    SRC

    # add the actual file content
    File.open(@input_path, "r") { |input| f << input.read }

    # add wrappers
    f << gen.generate_wrapper
  end

  # return info_file for further use
  info_file
end