Class: Homebrew::DevCmd::Prof

Inherits:
AbstractCommand show all
Defined in:
dev-cmd/prof.rb

Instance Attribute Summary

Attributes inherited from AbstractCommand

#args

Instance Method Summary collapse

Methods inherited from AbstractCommand

command, command_name, #initialize, parser

Constructor Details

This class inherits a constructor from Homebrew::AbstractCommand

Instance Method Details

#runvoid

This method returns an undefined value.



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# File 'dev-cmd/prof.rb', line 20

def run
  Homebrew.install_bundler_gems!(groups: ["prof"], setup_path: false)

  brew_rb = (HOMEBREW_LIBRARY_PATH/"brew.rb").resolved_path
  FileUtils.mkdir_p "prof"
  cmd = args.named.first

  case Commands.path(cmd)&.extname
  when ".rb"
    # expected file extension so we do nothing
  when ".sh"
    raise UsageError, <<~EOS
      `#{cmd}` is a Bash command!
      Try `hyperfine` for benchmarking instead.
    EOS
  else
    raise UsageError, "`#{cmd}` is an unknown command!"
  end

  Homebrew.setup_gem_environment!

  if args.stackprof?
    with_env HOMEBREW_STACKPROF: "1" do
      system(*HOMEBREW_RUBY_EXEC_ARGS, brew_rb, *args.named)
    end
    output_filename = "prof/d3-flamegraph.html"
    safe_system "stackprof --d3-flamegraph prof/stackprof.dump > #{output_filename}"
  else
    output_filename = "prof/call_stack.html"
    safe_system "ruby-prof", "--printer=call_stack", "--file=#{output_filename}", brew_rb, "--", *args.named
  end

  exec_browser output_filename
rescue OptionParser::InvalidOption => e
  ofail e

  # The invalid option could have been meant for the subcommand.
  # Suggest `brew prof list -r` -> `brew prof -- list -r`
  args = ARGV - ["--"]
  puts "Try `brew prof -- #{args.join(" ")}` instead."
end