Add dev tool for finding Jenkins jobs for a Beats PR

dev-tools/find_pr_jenkins_jobs.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# Description:
+#   This script finds Jenkins jobs for a given Beats PR.
+#
+# Usage:
+#   ./find_pr_jenkins_job.sh PR_NUMBER
+#
+# Example:
+#   ./find_pr_jenkins_job.sh 15790
+#
+
+set -e
+
+NUM_JOBS_TO_SEARCH=100
+
+get_pr_from_input() {
+    pr=$1
+    if [ -z $pr ]; then
+        echo "Usage: ./find_jenkins_job.sh PR_NUMBER" >&2
+        exit 1
+    fi
+
+    echo $pr
+}
+
+find_latest_beats_pr_job() {
+    curl -s 'https://beats-ci.elastic.co/job/elastic+beats+pull-request/api/json' | jq '.builds[0].number'
+}
+
+find_job_for_pr() {
+    job=$1
+    pr=$2
+
+    found=$(curl -s "https://beats-ci.elastic.co/job/elastic+beats+pull-request/$job/api/json" \
+                | jq -c ".actions[] | select(._class == \"org.jenkinsci.plugins.ghprb.GhprbParametersAction\").parameters[] | select(.name == \"ghprbPullId\" and .value == \"$pr\")" \
+                | wc -l)
+
+    echo $found
+}
+
+main() {
+    pr=$(get_pr_from_input $1)
+    echo "Searching last $NUM_JOBS_TO_SEARCH Jenkins jobs for PR number: $pr..."
+
+    n=$(find_latest_beats_pr_job $pr)
+    let e=$n-$NUM_JOBS_TO_SEARCH
+
+    while [ $n -gt $e ]; do
+        found=$(find_job_for_pr $n $pr)
+        if [ $found -gt 0 ]; then
+            echo "https://beats-ci.elastic.co/job/elastic+beats+pull-request/$n/"
+        fi
+
+        let n=$n-1
+    done
+}
+
+main $1