Prevent Travis timeout. (#50725)

cmd/brewcask-ci.rb

@@ -15,6 +15,9 @@ module Hbc
           raise CaskError, "This command isn’t meant to be run locally."
         end
 
+        $stdout.sync = true
+        $stderr.sync = true
+
         unless tap
           raise CaskError, "This command must be run from inside a tap directory."
         end
@@ -96,7 +99,15 @@ module Hbc
 
         Travis.fold travis_id do
           print "#{Tty.bold}#{Tty.yellow}#{name}#{Tty.reset} "
-          $stdout.flush
+
+          real_stdout = $stdout.dup
+
+          travis_wait = Thread.new do
+            loop do
+              sleep 595
+              real_stdout.print "\u200b"
+            end
+          end
 
           success, output = capture do
             begin
@@ -107,9 +118,12 @@ module Hbc
             end
           end
 
+          travis_wait.kill
+          travis_wait.join
+
           if success
             puts Formatter.success("✔")
-            puts output
+            puts output unless output.empty?
           else
             puts Formatter.error("✘")
           end
@@ -118,9 +132,6 @@ module Hbc
         puts output unless success
 
         success
-      ensure
-        $stdout.flush
-        $stderr.flush
       end
 
       def tap

cmd/lib/capture.rb

@@ -12,7 +12,6 @@ def capture
       begin
         yield
       ensure
-        w.flush
         w.close
       end
     end

cmd/lib/travis.rb

@@ -4,34 +4,28 @@ module Travis
   @start = {}
 
   def fold(id, &block)
-    begin
-      puts fold_start(id)
-      time(rand(2**32).to_s(16), &block)
-    ensure
-      puts fold_end(id)
-      $stdout.flush
-      $stderr.flush
-    end
+    print fold_start(id)
+    time(rand(2**32).to_s(16), &block)
+    print fold_end(id)
   end
 
   def fold_start(id)
-    "travis_fold:start:#{id}"
+    "travis_fold:start:#{id}\r\033[0K"
   end
 
   def fold_end(id)
-    "travis_fold:end:#{id}"
+    "travis_fold:end:#{id}\r\033[0K"
   end
 
   def time(id)
-    puts time_start(id)
+    print time_start(id)
     yield
-  ensure
-    puts time_end(id)
+    print time_end(id)
   end
 
   def time_start(id)
     @start[id] = Time.now
-    "travis_time:start:#{id}"
+    "travis_time:start:#{id}\r\033[0K"
   end
 
   def time_end(id)
@@ -39,6 +33,6 @@ module Travis
     finish = (Time.now.to_f * 1_000_000_000).to_i
     duration = finish - start
 
-    "travis_time:end:#{id},start=#{start},finish=#{finish},duration=#{duration}"
+    "travis_time:end:#{id},start=#{start},finish=#{finish},duration=#{duration}\r\033[0K"
   end
 end