Improve output.

Library/Homebrew/cmd/fetch.rb

@@ -82,12 +82,16 @@ def download_queue
 
  class Spinner
  FRAMES = [
- "◜",
- "◠",
- "◝",
- "◞",
- "◡",
- "◟",
+ "⠋",
+ "⠙",
+ "⠚",
+ "⠞",
+ "⠖",
+ "⠦",
+ "⠴",
+ "⠲",
+ "⠳",
+ "⠓",
  ].freeze
 
  sig { void }
@@ -221,22 +225,20 @@ def run
  end
 
  if concurrency == 1
- downloads.each_value do |promise|
+ downloads.each do |downloadable, promise|
  promise.wait!
  rescue ChecksumMismatchError => e
  opoo "#{downloadable.download_type.capitalize} reports different checksum: #{e.expected}"
  Homebrew.failed = true if downloadable.is_a?(Resource::Patch)
  end
  else
-
  spinner = Spinner.new
-
  remaining_downloads = downloads.dup
-
  previous_pending_line_count = 0
 
  begin
- print Tty.hide_cursor
+ $stdout.print Tty.hide_cursor
+ $stdout.flush
 
  output_message = lambda do |downloadable, promise|
  status = case promise.state
@@ -245,13 +247,14 @@ def run
  when :rejected
  "#{Tty.red}✘#{Tty.reset}"
  when :pending
- spinner
+ "#{Tty.blue}#{spinner}#{Tty.reset}"
  else
  raise promise.state
  end
 
  message = "#{downloadable.download_type.capitalize} #{downloadable.name}"
- puts "#{status} #{message}"
+ $stdout.puts "#{status} #{message}"
+ $stdout.flush
 
  if promise.rejected? && (e = promise.reason).is_a?(ChecksumMismatchError)
  opoo "#{downloadable.download_type.capitalize} reports different checksum: #{e.expected}"
@@ -273,6 +276,7 @@ def run
  finished_downloads.each do |downloadable, promise|
  previous_pending_line_count -= 1
  print "\033[K"
+ $stdout.flush
  output_message.call(downloadable, promise)
  end
 
@@ -281,6 +285,7 @@ def run
  break if previous_pending_line_count >= [concurrency, (Tty.height - 1)].min
 
  print "\033[K"
+ $stdout.flush
  previous_pending_line_count += output_message.call(downloadable, promise)
  end
 
@@ -292,11 +297,13 @@ def run
  sleep 0.05
  rescue Interrupt
  print "\n" * previous_pending_line_count
+ $stdout.flush
  raise
  end
  end
  ensure
- print Tty.show_cursor
+ $stdout.print Tty.show_cursor
+ $stdout.flush
  end
  end