temp! Temporarily bring back Rails 4.2 to build matrix

Author: pirj

.travis.yml

@@ -23,6 +23,7 @@ bundler_args: "--binstubs --path ../bundle --retry=3 --jobs=3"
 before_install:
   - script/update_rubygems_and_install_bundler
   - script/clone_all_rspec_repos
+  - script/downgrade_bundler_on_old_rails
 
 before_script:
   # Rails 4+ complains with a bundler rails binstub in PROJECT_ROOT/bin/
@@ -84,4 +85,8 @@ matrix:
     - rvm: 2.3.8
       env: RAILS_VERSION='~> 5.0.0'
 
+    # Rails 4.2 REMOVE ME!
+    - rvm: 2.5.5
+      env: RAILS_VERSION='~> 4.2.0'
+
   fast_finish: true

script/downgrade_bundler_on_old_rails

@@ -0,0 +1,20 @@
+#!/bin/bash
+# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# DO NOT modify it by hand as your changes will get lost the next time it is generated.
+
+set -e
+source script/functions.sh
+
+if ruby -e "exit(ENV['RAILS_VERSION'].scan(/\d+\.\d+.\d+/)[0].to_f < 5)"; then
+  # On Rails versions less than 5, Bundler 2.0 is not supported
+  echo "Warning dowgrading to older version of Bundler"
+  echo "Current bundler versions installed: `gem list | grep '^bundler ('`"
+
+  gem uninstall -aIx bundler || echo "Warning error occured removing bundler via gem"
+
+  rvm @global do gem uninstall -aIx bundler || echo "Warning error occured removing bundler via rvm"
+
+  echo "Bundler version list after uninstall: `gem list | grep '^bundler ('`"
+
+  gem install bundler -v '1.17.3'
+fi