Add script to get a list of failing pants from travis (pantsbuild#5946)

build-support/bin/get_failing_travis_targets_for_pr.sh

@@ -0,0 +1,36 @@
+#!/bin/bash -e
+
+if [[ $# != 1 ]]; then
+  echo >&2 "Usage: $0 pull-request-number"
+  exit 1
+fi
+pull=$1
+
+mkdir -p logs/jobs
+
+curl=(curl -s -S -H 'Travis-API-Version: 3')
+
+"${curl[@]}" 'https://api.travis-ci.org/repo/pantsbuild%2Fpants/builds?event_type=pull_request&limit=100&sort_by=finished_at:desc' > logs/search
+jobs="$(cat logs/search | jq "[ .builds[] | select(.pull_request_number == ${pull}) ][0] | .jobs[].id")"
+targets=()
+for job in ${jobs}; do
+  mkdir -p "logs/jobs/${job}"
+  "${curl[@]}" "https://api.travis-ci.org/job/${job}" >"logs/jobs/${job}/info"
+  state="$(cat logs/jobs/${job}/info | jq -r '.state')"
+  case "${state}" in
+    "passed")
+      continue
+      ;;
+    "failed")
+      "${curl[@]}" "https://api.travis-ci.org/job/${job}/log.txt" > "logs/jobs/${job}/txt"
+      targets=("${targets[@]}" $(cat -v "logs/jobs/${job}/txt" | awk '$2 == "....." && $3 ~ /^FAILURE/ {print $1}'))
+      ;;
+    *)
+      echo >&2 "Job ${job} state ${state}"
+      ;;
+  esac
+done
+
+(for target in "${targets[@]}"; do
+  echo "${target}"
+done | sort -u)