Fix mac ruby tests

kokoro/macos/ruby25/build.sh

@@ -5,4 +5,4 @@
 # Change to repo root
 cd $(dirname $0)/../../..
 
-./kokoro/macos/test_ruby.sh ruby-2.5.1
+bash -l kokoro/macos/test_ruby.sh ruby-2.5.1

kokoro/macos/ruby26/build.sh

@@ -5,4 +5,4 @@
 # Change to repo root
 cd $(dirname $0)/../../..
 
-./kokoro/macos/test_ruby.sh ruby-2.6.0
+bash -l kokoro/macos/test_ruby.sh ruby-2.6.0

kokoro/macos/ruby27/build.sh

@@ -5,4 +5,4 @@
 # Change to repo root
 cd $(dirname $0)/../../..
 
-./kokoro/macos/test_ruby.sh ruby-2.7.0
+bash -l kokoro/macos/test_ruby.sh ruby-2.7.0

kokoro/macos/ruby30/build.sh

@@ -5,4 +5,4 @@
 # Change to repo root
 cd $(dirname $0)/../../..
 
-./kokoro/macos/test_ruby.sh ruby-3.0.2
+bash -l kokoro/macos/test_ruby.sh ruby-3.0.2

kokoro/macos/ruby31/build.sh

@@ -8,4 +8,4 @@ cd $(dirname $0)/../../..
 # Fix locale issues in Monterey.
 export LC_ALL=en_US.UTF-8
 
-./kokoro/macos/test_ruby.sh ruby-3.1.0
+bash -l kokoro/macos/test_ruby.sh ruby-3.1.0

kokoro/macos/test_ruby.sh

@@ -1,19 +1,26 @@
 #!/bin/bash
 
-set -ex
+set -eux
 
 VERSION=$1
 
 # Prepare worker environment to run tests
 KOKORO_INSTALL_RVM=yes
 source kokoro/macos/prepare_build_macos_rc
 
-# Setup ruby
+# Install dependencies
+brew install wget
+
+# Setup ruby.  Disable unbound variable errors, due to a known issue
+# https://github.com/rvm/rvm/issues/4618.
+set +u
 rvm install $VERSION
 rvm use $VERSION
-rvm get head
-which ruby
 rvm current | grep -qe "${RUBY_VERSION}.*" || exit 1;
+set -u
+
+gem install --no-document bundler -v 1.17.3
+bundle
 
 # Run tests
 bazel test //ruby/... --test_env=KOKORO_RUBY_VERSION=$VERSION

ruby/BUILD.bazel

@@ -73,7 +73,6 @@ pkg_files(
         "Gemfile",
         "Rakefile",
         "README.md",
-        "travis-test.sh",
     ],
     strip_prefix = strip_prefix.from_root(""),
     visibility = ["//pkg:__pkg__"],