Class: Homebrew::DevCmd::Prof Private

Inherits:
AbstractCommand show all
Defined in:
dev-cmd/prof.rb,
sorbet/rbi/dsl/homebrew/dev_cmd/prof.rbi

This class is part of a private API. This class may only be used in the Homebrew/brew repository. Third parties should avoid using this class if possible, as it may be removed or changed without warning.

Defined Under Namespace

Classes: Args

Instance Method Summary collapse

Methods inherited from AbstractCommand

command, command_name, dev_cmd?, #initialize, parser, ruby_cmd?

Constructor Details

This class inherits a constructor from Homebrew::AbstractCommand

Instance Method Details

#args ⇒ Homebrew::DevCmd::Prof::Args

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Returns:



10
 
# File 'sorbet/rbi/dsl/homebrew/dev_cmd/prof.rbi', line 10

def args; end

#run ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.



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# File 'dev-cmd/prof.rb', line 22

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}"
    exec_browser output_filename
  elsif args.vernier?
    output_filename = "prof/vernier.json"
    Process::UID.change_privilege(Process.euid) if Process.euid != Process.uid
    safe_system "vernier", "run", "--output=#{output_filename}", "--allocation_sample_rate=500", "--",
                RUBY_PATH, brew_rb, *args.named
    ohai "Profiling complete!"
    puts "Upload the results from #{output_filename} to:"
    puts "  #{Formatter.url("https://vernier.prof")}"
  else
    output_filename = "prof/call_stack.html"
    safe_system "ruby-prof", "--printer=call_stack", "--file=#{output_filename}", brew_rb, "--", *args.named
    exec_browser output_filename
  end
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