s/Travis/Buildkite/

README.md

@@ -97,7 +97,7 @@ Everyone interacting in Rails and its sub-projects' codebases, issue trackers, c
 
 ## Code Status
 
-[![Build Status](https://travis-ci.org/rails/rails.svg?branch=master)](https://travis-ci.org/rails/rails)
+[![Build Status](https://badge.buildkite.com/ab1152b6a1f6a61d3ea4ec5b3eece8d4c2b830998459c75352.svg?branch=master)](https://buildkite.com/rails/rails)
 
 ## License
 

RELEASING_RAILS.md

@@ -14,7 +14,7 @@ Today is mostly coordination tasks. Here are the things you must do today:
 Do not release with a Red CI. You can find the CI status here:
 
 ```
-https://travis-ci.org/rails/rails
+https://buildkite.com/rails/rails
 ```
 
 ### Is Sam Ruby happy? If not, make him happy.

actioncable/karma.conf.js

@@ -52,9 +52,9 @@ if (process.env.CI) {
   }
 
   function buildId() {
-    const { TRAVIS_BUILD_NUMBER, TRAVIS_BUILD_ID } = process.env
-    return TRAVIS_BUILD_NUMBER && TRAVIS_BUILD_ID
-      ? `TRAVIS #${TRAVIS_BUILD_NUMBER} (${TRAVIS_BUILD_ID})`
+    const { BUILDKITE_JOB_ID } = process.env
+    return BUILDKITE_JOB_ID
+      ? `Buildkite ${BUILDKITE_JOB_ID}`
       : ""
   }
 }

guides/source/contributing_to_ruby_on_rails.md

@@ -302,7 +302,7 @@ the recommended workflow with the [rails-dev-box](https://github.com/rails/rails
 As a compromise, test what your code obviously affects, and if the change is
 not in railties, run the whole test suite of the affected component. If all
 tests are passing, that's enough to propose your contribution. We have
-[Travis CI](https://travis-ci.org/rails/rails) as a safety net for catching
+[Buildkite](https://buildkite.com/rails/rails) as a safety net for catching
 unexpected breakages elsewhere.
 
 #### Entire Rails:
@@ -418,7 +418,7 @@ To run a single test against all adapters, use:
 $ bundle exec rake TEST=test/cases/associations/has_many_associations_test.rb
 ```
 
-You can invoke `test_jdbcmysql`, `test_jdbcsqlite3` or `test_jdbcpostgresql` also. See the file `activerecord/RUNNING_UNIT_TESTS.rdoc` for information on running more targeted database tests, or the file `ci/travis.rb` for the test suite run by the continuous integration server.
+You can invoke `test_jdbcmysql`, `test_jdbcsqlite3` or `test_jdbcpostgresql` also. See the file `activerecord/RUNNING_UNIT_TESTS.rdoc` for information on running more targeted database tests.
 
 ### Warnings
 
@@ -677,7 +677,7 @@ $ git apply ~/my_changes.patch
 
 This works well for simple changes. However, if your changes are complicated or if the code in master has deviated significantly from your target branch, it might require more work on your part. The difficulty of a backport varies greatly from case to case, and sometimes it is simply not worth the effort.
 
-Once you have resolved all conflicts and made sure all the tests are passing, push your changes and open a separate pull request for your backport. It is also worth noting that older branches might have a different set of build targets than master. When possible, it is best to first test your backport locally against the Ruby versions listed in `.travis.yml` before submitting your pull request.
+Once you have resolved all conflicts and made sure all the tests are passing, push your changes and open a separate pull request for your backport. It is also worth noting that older branches might have a different set of build targets than master. When possible, it is best to first test your backport locally against the oldest Ruby version permitted by the target branch's `rails.gemspec` before submitting your pull request.
 
 And then... think about your next contribution!