Use dedicated upload_coverage script.

Library/Homebrew/.simplecov

@@ -52,9 +52,3 @@ SimpleCov.start do
     /Homebrew/test.rb
   ]
 end
-
-if ENV["CODECOV_TOKEN"] || ENV["TRAVIS"]
-  require "codecov"
-  formatter = SimpleCov::Formatter::Codecov.new
-  formatter.format(SimpleCov::ResultMerger.merged_result)
-end

Library/Homebrew/cask/cmd/brew-cask-tests.rb

@@ -10,8 +10,8 @@ def run_tests(executable, files, args = [])
   system "bundle", "exec", executable, *opts, "--", *args, "--", *files
 end
 
-repo_root = Pathname.new(__FILE__).realpath.parent.parent
-repo_root.cd do
+cask_root = Pathname.new(__FILE__).realpath.parent.parent
+cask_root.cd do
   ENV["HOMEBREW_NO_ANALYTICS_THIS_RUN"] = "1"
   ENV["HOMEBREW_NO_EMOJI"] = "1"
   ENV.delete("HOMEBREW_CASK_OPTS")
@@ -26,6 +26,7 @@ repo_root.cd do
 
   if ARGV.flag?("--coverage")
     ENV["HOMEBREW_TESTS_COVERAGE"] = "1"
+    upload_coverage = ENV["CODECOV_TOKEN"] || ENV["TRAVIS"]
   end
 
   failed = false
@@ -47,4 +48,9 @@ repo_root.cd do
   end
 
   Homebrew.failed = failed
+
+  if upload_coverage
+    puts "Submitting Codecov coverage..."
+    system "bundle", "exec", "test/upload_coverage.rb"
+  end
 end

Library/Homebrew/cask/test/upload_coverage.rb

@@ -0,0 +1,6 @@
+#!/usr/bin/env ruby
+require "simplecov"
+require "codecov"
+
+formatter = SimpleCov::Formatter::Codecov.new
+formatter.format SimpleCov::ResultMerger.merged_result