Add initial Jenkins detector (#33)

library/otel_traces_detector.sh

@@ -25,3 +25,8 @@ fi
 if [ ${DEPLOYMENT_ID-} ]; then
   . "${OTEL_SH_LIB_PATH}/otel_traces_detector_harness.sh"
 fi
+
+# Jenkins
+if [ ${JENKINS_URL-} ]; then
+  . "${OTEL_SH_LIB_PATH}/otel_traces_detector_jenkins.sh"
+fi

library/otel_traces_detector_jenkins.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+# Copyright 2022 Krzysztof Kowalski
+
+# 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
+
+#     https://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.
+
+. "${OTEL_SH_LIB_PATH}/log.sh"
+
+log_info "Detected, Jenkins pipeline"
+
+detector_resource_attributes=(
+  "jenkins.build.id:${BUILD_ID}"
+  "jenkins.build.number:${BUILD_NUMBER}"
+  "jenkins.build.tag:${BUILD_TAG}"
+  "jenkins.build.url:${BUILD_URL}"
+  "jenkins.executor.number:${EXECUTOR_NUMBER}"
+  "jenkins.hostname:${HOSTNAME}"
+  "jenkins.java.home:${JAVA_HOME}"
+  "jenkins.job.name:${JOB_NAME}"
+  "jenkins.job.url:${JOB_URL}"
+  "jenkins.node.name:${NODE_NAME}"
+  "jenkins.url:${JENKINS_URL}"
+  "jenkins.version:${JENKINS_VERSION}"
+  "jenkins.workspace:${WORKSPACE}"
+)