Class: CheckPlease::CLI::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/check_please/cli/runner.rb

Instance Method Summary collapse

Constructor Details

#initialize(exe_file_name) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/check_please/cli/runner.rb', line 5

def initialize(exe_file_name)
  @parser = Parser.new(exe_file_name)
end

Instance Method Details

#run(*args) ⇒ Object

NOTE: unusually for me, I’m using Ruby’s ‘or` keyword in this method. `or` short circuits just like `||`, but has lower precedence, which enables some shenanigans…



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# File 'lib/check_please/cli/runner.rb', line 12

def run(*args)
  args.flatten!
  print_help_and_exit if args.empty?

  begin
    flags = @parser.flags_from_args!(args)
  rescue InvalidFlag => e
    print_help_and_exit e.message
  end

  # The reference MUST be the first arg...
  reference = \
    read_file(args.shift) \
    or print_help_and_exit "Missing <reference> argument"

  # The candidate MAY be the second arg, or it might have been piped in...
  candidate = \
    read_file(args.shift) \
    || read_piped_stdin \
    or print_help_and_exit "Missing <candidate> argument, AND nothing was piped in"

  # Looks like we're good to go!
  diff_view = CheckPlease.render_diff(reference, candidate, flags)
  puts diff_view
end