[CI] Adds script to create new Jenkins Jobs

Author: picandocodigo

.github/create_jenkins_job.rb

@@ -0,0 +1,52 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you 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.
+source_branch = ARGV[0]
+target_branch = ARGV[1]
+
+def usage
+  <<~USAGE
+
+  This script creates a new Jenkins Job in .ci/jobs. It takes two parameters:
+    - source branch: branch name for the job to use as a source
+    - target branch: branch name for the new job
+  In the new file, it is going to replace the source branch value with the target branch value and
+  create a new yml file based on that.
+
+  E.g.:
+    $ #{__FILE__} 7.x 7.99
+  This is going to use .ci/jobs/elastic+elasticsearch-ruby+7.x.yml as a source and create
+  .ci/jobs/elastic+elasticsearch-ruby+7.99.yml and replace all the ocurrences of '7.x' with '7.99'
+  in the new file.
+  USAGE
+end
+
+unless source_branch && target_branch
+  puts usage
+  exit
+end
+
+job_file = File.expand_path("../.ci/jobs/elastic+elasticsearch-ruby+#{source_branch}.yml", __dir__)
+raise ArgumentError, "cannot find file #{job_file}" unless File.exist? job_file
+
+target_branch_file = File.expand_path("../.ci/jobs/elastic+elasticsearch-ruby+#{target_branch}.yml", __dir__)
+target_branch_content = File.read(job_file).gsub(source_branch, target_branch)
+
+begin
+  File.open(target_branch_file, 'w') { |file| file.puts target_branch_content }
+rescue StandardError => e
+  raise e
+end