cancel-draft-build

#!/usr/bin/env bash

set -euf -o pipefail

if [[ -z "$CIRCLE_PULL_REQUEST" ]]; then
  echo "Not PR branch, skipped"
  exit 0
fi

PR_NUMBER=${CIRCLE_PULL_REQUEST//[!0-9]/}
RESPONSE=$(curl --silent \
  -H "Authorization: token $GITHUB_TOKEN" \
  -H "Accept: application/vnd.github.v3+json" \
  https://api.github.com/repos/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/pulls/$PR_NUMBER
)

DRAFT=$(echo $RESPONSE | jq ".draft")
DRAFT_LABEL=$(echo $RESPONSE | jq ".labels | map(select(.name | test(\"Draft\"))) | .[]")

if [[ $DRAFT == 'true' || $DRAFT_LABEL ]]; then
  echo "Draft PR"
else
  echo "Non Draft PR"
  exit 0
fi

echo "Attempting to cancel any running jobs"
CIRCLE_API_BASE_URL="https://circleci.com/api/v1.1/project/github/${CIRCLE_PROJECT_USERNAME}/${CIRCLE_PROJECT_REPONAME}"
AUTH_PARAMS="circle-token=${CIRCLECI_TOKEN}"
SELF_BUILD_NUM="${CIRCLE_BUILD_NUM}"

ALL_JOBS=$(curl --silent --show-error "${CIRCLE_API_BASE_URL}/tree/${CIRCLE_BRANCH}?${AUTH_PARAMS}")

RUNNING_JOBS=$(echo "${ALL_JOBS}" | jq "map(if .status == \"running\" or .status == \"not_run\"  then .build_num else \"None\" end) - [${SELF_BUILD_NUM}] - [\"None\"] | .[]")

for buildNum in $RUNNING_JOBS; do
  echo "Canceling ${buildNum}"
  curl --silent --show-error --request POST "${CIRCLE_API_BASE_URL}/${buildNum}/cancel?${AUTH_PARAMS}" > /dev/null
done