RUBY-331: Migrate to Jenkins pipelines (#264)

Author: absurdfarce

Jenkinsfile

@@ -0,0 +1,100 @@
+def initializeEnvironment() {
+
+    env.DRIVER_DISPLAY_NAME = 'Cassandra Ruby Driver'
+    env.DRIVER_METRIC_TYPE = 'oss'
+
+    env.GIT_SHA = "${env.GIT_COMMIT.take(7)}"
+    env.GITHUB_PROJECT_URL = "https://${GIT_URL.replaceFirst(/(git@|http:\/\/|https:\/\/)/, '').replace(':', '/').replace('.git', '')}"
+    env.GITHUB_BRANCH_URL = "${GITHUB_PROJECT_URL}/tree/${env.BRANCH_NAME}"
+    env.GITHUB_COMMIT_URL = "${GITHUB_PROJECT_URL}/commit/${env.GIT_COMMIT}"
+
+    sh label: 'Download Apache CassandraⓇ or DataStax Enterprise', script: '''#!/bin/bash -lex
+        . ${CCM_ENVIRONMENT_SHELL} ${CASSANDRA_VERSION}
+    '''
+}
+
+def installDependencies() {
+    sh label: 'Set Ruby env and update gems', script: '''#!/bin/bash -le
+        rbenv global ${RUBY_VERSION}
+
+        ruby_bin_version=`ruby -v`
+        echo "Ruby binary version: ${ruby_bin_version}"
+        if [[ $ruby_bin_version == jruby* ]]; then
+          # Add '-java' to version as that is included in version name when using jruby
+          echo "JRuby detected, updating Gemfile.lock"
+          sed -i -r 's/cassandra-driver \\((.*)\\)/cassandra-driver (\\1-java)/' Gemfile.lock
+        fi
+
+        bundle update --bundler
+        bundle --version
+        bundle install --without development docs
+    '''
+}
+
+def executeTests() {
+    sh label: 'Execute all tests', script: '''#!/bin/bash -le
+        # Load CCM environment variables
+        set -o allexport
+        . ${HOME}/environment.txt
+        set +o allexport
+
+        bundle exec rake test
+    '''
+}
+
+pipeline {
+    agent none
+
+    // Global pipeline timeout
+    options {
+	timeout(time: 10, unit: 'HOURS')
+	buildDiscarder(logRotator(artifactNumToKeepStr: '10', // Keep only the last 10 artifacts
+				  numToKeepStr: '50'))        // Keep only the last 50 build records
+    }
+
+    environment {
+	CCM_ENVIRONMENT_SHELL = '/usr/local/bin/ccm_environment.sh'
+    }
+
+    stages {
+	stage('Per-Commit') {
+	    environment {
+		OS_VERSION = 'ubuntu/bionic64/ruby-driver'
+	    }
+
+	    matrix {
+		axes {
+		    axis {
+			name 'CASSANDRA_VERSION'
+			values '2.1', '3.11', '4.0'
+		    }
+		    axis {
+			name 'RUBY_VERSION'
+			values '2.3.6', '2.4.3', '2.7.0', 'jruby-9.1.15.0'
+		    }
+		}
+		agent {
+		    label "${OS_VERSION}"
+		}
+
+		stages {
+		    stage('Initialize-Environment') {
+			steps {
+			    initializeEnvironment()
+			}
+		    }
+		    stage('Install-Dependencies') {
+			steps {
+			    installDependencies()
+			}
+		    }
+		    stage('Execute-Tests') {
+			steps {
+			    executeTests()
+			}
+		    }		    
+		}
+	    }
+	}
+    }
+}