add initial kokoro configs (#163)

.kokoro/build.bat

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+REM This file runs tests for merges, PRs, and nightlies.
+REM There are a few rules for what tests are run:
+REM  * PRs run all non-acceptance tests for every library.
+REM  * Merges run all non-acceptance tests for every library, and acceptance tests for all altered libraries.
+REM  * Nightlies run all acceptance tests for every library.
+REM Currently only runs tests on 2.5.1
+
+"C:\Program Files\Git\bin\bash.exe" github/google-auth-library-ruby/.kokoro/windows.sh

.kokoro/build.sh

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+#!/bin/bash
+
+# This file runs tests for merges, PRs, and nightlies.
+# There are a few rules for what tests are run:
+#  * PRs run all non-acceptance tests for every library.
+#  * Merges run all non-acceptance tests for every library, and acceptance tests for all altered libraries.
+#  * Nightlies run all acceptance tests for every library.
+
+set -eo pipefail
+
+# Debug: show build environment
+env | grep KOKORO
+
+cd github/google-auth-library-ruby/
+
+# Print out Ruby version
+ruby --version
+
+# Temporary workaround for a known bundler+docker issue:
+# https://github.com/bundler/bundler/issues/6154
+export BUNDLE_GEMFILE=
+
+RUBY_VERSIONS=("2.3.7" "2.4.4" "2.5.1")
+
+# Capture failures
+EXIT_STATUS=0 # everything passed
+function set_failed_status {
+    EXIT_STATUS=1
+}
+
+for version in "${RUBY_VERSIONS[@]}"; do
+    rbenv global "$version"
+    (bundle update && bundle exec rake) || set_failed_status
+done
+
+exit $EXIT_STATUS

.kokoro/common.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Download trampoline resources. These will be in ${KOKORO_GFILE_DIR}
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# All builds use the trampoline script to run in docker.
+build_file: "google-auth-library-ruby/.kokoro/trampoline.sh"
+
+# Download secrets from Cloud Storage.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-auth-library-ruby"
+
+# Tell the trampoline which build file to use.
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-auth-library-ruby/.kokoro/build.sh"
+}
+
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+  }
+}

.kokoro/continuous/common.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Download resources for system tests (service account key, etc.)
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-cloud-ruby"
+
+env_vars: {
+    key: "JOB_TYPE"
+    value: "continuous"
+}

.kokoro/continuous/linux.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/trampoline.sh"
+
+# Configure the docker image for kokoro-trampoline.
+# Dockerfile is maintained at https://github.com/googleapis/google-cloud-ruby/tree/master/.kokoro/docker/ruby-multi
+env_vars: {
+    key: "TRAMPOLINE_IMAGE"
+    value: "gcr.io/cloud-devrel-kokoro-resources/google-cloud-ruby/ruby-multi-ubuntu"
+}
+
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-auth-library-ruby/.kokoro/build.sh"
+}

.kokoro/continuous/osx.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/osx.sh"

.kokoro/continuous/windows.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/build.bat"

.kokoro/osx.sh

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+#!/bin/bash
+
+# This file runs tests for merges, PRs, and nightlies.
+# There are a few rules for what tests are run:
+#  * PRs run all non-acceptance tests for every library.
+#  * Merges run all non-acceptance tests for every library, and acceptance tests for all altered libraries.
+#  * Nightlies run all acceptance tests for every library.
+#  * Currently only runs tests on 2.5.0
+
+set -eo pipefail
+
+# Debug: show build environment
+env | grep KOKORO
+
+cd github/google-auth-library-ruby/
+
+# Print out Ruby version
+ruby --version
+
+# Temporary workaround for a known bundler+docker issue:
+# https://github.com/bundler/bundler/issues/6154
+export BUNDLE_GEMFILE=
+
+# Capture failures
+EXIT_STATUS=0 # everything passed
+function set_failed_status {
+    EXIT_STATUS=1
+}
+
+gem install bundle
+
+
+(bundle update && bundle exec rake) || set_failed_status
+
+exit $EXIT_STATUS

.kokoro/presubmit/common.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Download resources for system tests (service account key, etc.)
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-cloud-ruby"
+
+env_vars: {
+    key: "JOB_TYPE"
+    value: "presubmit"
+}

.kokoro/presubmit/linux.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/trampoline.sh"
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+    key: "TRAMPOLINE_IMAGE"
+    value: "gcr.io/cloud-devrel-kokoro-resources/google-cloud-ruby/ruby-multi-ubuntu"
+}
+
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-auth-library-ruby/.kokoro/build.sh"
+}

.kokoro/presubmit/osx.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/osx.sh"

.kokoro/presubmit/windows.cfg

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+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/build.bat"

.kokoro/trampoline.sh

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+#!/bin/bash
+# Copyright 2017 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+set -eo pipefail
+# Always run the cleanup script, regardless of the success of bouncing into
+# the container.
+function cleanup() {
+    chmod +x ${KOKORO_GFILE_DIR}/trampoline_cleanup.sh
+    ${KOKORO_GFILE_DIR}/trampoline_cleanup.sh
+    echo "cleanup";
+}
+trap cleanup EXIT
+python3 "${KOKORO_GFILE_DIR}/trampoline_v1.py"

.kokoro/windows.sh

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+#!/bin/bash
+
+# This file runs tests for merges, PRs, and nightlies.
+# There are a few rules for what tests are run:
+#  * PRs run all non-acceptance tests for every library.
+#  * Merges run all non-acceptance tests for every library, and acceptance tests for all altered libraries.
+#  * Nightlies run all acceptance tests for every library.
+#  * Currently only runs tests on 2.5.1
+
+set -eo pipefail
+
+# Debug: show build environment
+env | grep KOKORO
+
+cd github/google-auth-library-ruby/
+
+# Print out Ruby version
+ruby --version
+
+# Temporary workaround for a known bundler+docker issue:
+# https://github.com/bundler/bundler/issues/6154
+export BUNDLE_GEMFILE=
+
+# Capture failures
+EXIT_STATUS=0 # everything passed
+function set_failed_status {
+    EXIT_STATUS=1
+}
+
+(bundle update && bundle exec rake) || set_failed_status
+
+exit $EXIT_STATUS