Revert "Remove Travis CI (#86613)" (#86633)

This reverts commit 464c19f391.

.travis.yml

@@ -0,0 +1,52 @@
+language: c
+
+os: osx
+osx_image:
+  - xcode10.1
+  - xcode10.3
+
+branches:
+  only:
+    - master
+
+cache:
+  directories:
+    - /usr/local/Homebrew/Library/Homebrew/vendor/bundle
+    - /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby
+
+install:
+  - |
+    # Force strict error checking.
+    set -o errexit
+    set -o pipefail
+  - |
+    # Update Travis commit range.
+    # This is not normally required but does prevent problems with outdated forks and
+    # deleted casks (see https://github.com/Homebrew/homebrew-cask/pull/43164).
+    BRANCH_COMMIT="${TRAVIS_COMMIT_RANGE##*.}"
+    TARGET_COMMIT="${TRAVIS_COMMIT_RANGE%%.*}"
+    if ! MERGE_BASE="$(git merge-base "${BRANCH_COMMIT}" "${TARGET_COMMIT}" 2>/dev/null)"; then
+      git fetch --unshallow
+      MERGE_BASE="$(git merge-base "${BRANCH_COMMIT}" "${TARGET_COMMIT}")"
+    fi
+    export TRAVIS_COMMIT_RANGE="${MERGE_BASE}...${BRANCH_COMMIT}"
+  - |
+    # Switch to master branch.
+    export HOMEBREW_COLOR=1
+    export HOMEBREW_DEVELOPER=1
+    export HOMEBREW_NO_AUTO_UPDATE=1
+    export HOMEBREW_FORCE_BREWED_CURL=1
+    brew update-reset
+    HOMEBREW_INSTALL_BUNDLER_GEMS_FIRST=1 brew config
+  - |
+    # Mirror the repo as a tap.
+    TAP_DIR="$(brew --repository "${TRAVIS_REPO_SLUG}")"
+    mkdir -p "${TAP_DIR}"
+    rsync -az --delete "${TRAVIS_BUILD_DIR}/" "${TAP_DIR}/"
+    export TRAVIS_BUILD_DIR="${TAP_DIR}"
+    builtin cd "${TAP_DIR}"
+
+script: brew cask ci
+
+notifications:
+  email: false

cmd/brewcask-ci.rb

@@ -5,6 +5,7 @@ require "utils/formatter"
 
 require_relative "lib/capture"
 require_relative "lib/check"
+require_relative "lib/travis"
 
 module Cask
   class Cmd
@@ -157,27 +158,44 @@ module Cask
 
       private
 
-      def step(name)
+      def step(name, travis_id)
+        unless ENV.key?("TRAVIS_COMMIT_RANGE")
+          puts Formatter.headline(name, color: :yellow)
+          return yield != false
+        end
+
         success = false
         output = nil
 
-        print Formatter.headline("#{name} ", color: :yellow)
+        Travis.fold travis_id do
+          print Formatter.headline("#{name} ", color: :yellow)
 
-        real_stdout = $stdout.dup
+          real_stdout = $stdout.dup
 
-        success, output = capture do
-          yield != false
-        rescue => e
-          $stderr.puts e.message
-          $stderr.puts e.backtrace
-          false
-        end
+          travis_wait = Thread.new do
+            loop do
+              sleep 595
+              real_stdout.print "\u200b"
+            end
+          end
 
-        if success
-          puts Formatter.success("✔")
-          puts output unless output.empty?
-        else
-          puts Formatter.error("✘")
+          success, output = capture do
+            yield != false
+          rescue => e
+            $stderr.puts e.message
+            $stderr.puts e.backtrace
+            false
+          end
+
+          travis_wait.kill
+          travis_wait.join
+
+          if success
+            puts Formatter.success("✔")
+            puts output unless output.empty?
+          else
+            puts Formatter.error("✘")
+          end
         end
 
         puts output unless success

cmd/lib/travis.rb

@@ -0,0 +1,38 @@
+module Travis
+  module_function
+
+  @start = {}
+
+  def fold(id, &block)
+    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}\r\033[0K"
+  end
+
+  def fold_end(id)
+    "travis_fold:end:#{id}\r\033[0K"
+  end
+
+  def time(id)
+    print time_start(id)
+    yield
+    print time_end(id)
+  end
+
+  def time_start(id)
+    @start[id] = Time.now
+    "travis_time:start:#{id}\r\033[0K"
+  end
+
+  def time_end(id)
+    start = (@start[id].to_f * 1_000_000_000).to_i
+    finish = (Time.now.to_f * 1_000_000_000).to_i
+    duration = finish - start
+
+    "travis_time:end:#{id},start=#{start},finish=#{finish},duration=#{duration}\r\033[0K"
+  end
+end