post-cdash-status

#!/bin/bash

set -eo pipefail

readonly API_BASE="https://api.github.com/repos/${GITHUB_REPOSITORY}"

function require_cmd() {
  command -v "${1}" &> /dev/null || { echo "${1} not found"; exit 1; }
}

function require_env_var() {
  if [ -z "${!1}" ]; then
    echo "${1} env variable empty"
    exit 2
  fi
}

#==============================================================================

require_cmd "curl"
require_cmd "jq"
require_env_var "CDASH_BASE_URL"
require_env_var "CDASH_PROJECT"
require_env_var "COMMIT_SHA"
require_env_var "GITHUB_REPOSITORY"
require_env_var "GITHUB_STATUS_NAME"
require_env_var "GITHUB_TOKEN"

#==============================================================================

readonly status_response=$(
  curl -q -s \
       -H "Authorization: Bearer ${GITHUB_TOKEN}" \
       -H "Content-Type: application/json" \
       -H "Accept: application/vnd.github+json" \
       -H "X-GitHub-Api-Version: 2022-11-28" \
       "${API_BASE}/commits/${COMMIT_SHA}/statuses")

# The API returns an empty array if no statuses were found
# This can happen if the COMMIT_SHA doesn't point to the head of the branch/PR
if [ "true" == $(jq -r '. == []' <<<$status_response) ]; then
  echo "No statuses found for '${API_BASE}/commits/${COMMIT_SHA}'"
  exit 1
fi

readonly statuses=$(jq -r '[.[].context] | @json' <<< $status_response)
if [ -z "$statuses" ]; then
  echo "Failed to parse statuses for '${API_BASE}/commits/${COMMIT_SHA}'"
  echo -e "Request returned:\n$status_response"
  exit 2
fi

post_body="$(cat<<EOF
{
  "state": "success",
  "target_url": "${CDASH_BASE_URL}/index.php?compare1=61&filtercount=1&field1=revision&project=${CDASH_PROJECT}&showfilters=0&limit=100&value1=${COMMIT_SHA}&showfeed=0",
  "description": "Build and test results available on CDash",
  "context": "${GITHUB_STATUS_NAME}"
}
EOF
)"

post_url="${API_BASE}/statuses/${COMMIT_SHA}"

if [ "true" == $(jq -re "all(. != \"${GITHUB_STATUS_NAME}\")" <<<"${statuses}") ]; then
  echo "Need to post a status for context ${GITHUB_STATUS_NAME}"

  readonly response=$(
    curl -X POST -q -s \
         -H "Authorization: Bearer ${GITHUB_TOKEN}" \
         -H "Content-Type: application/json" \
         -H "Accept: application/vnd.github+json" \
         -H "X-GitHub-Api-Version: 2022-11-28" \
         -d "${post_body}" "${post_url}")

    if [ "false" == $(jq -r 'has("creator")') <<<"$response" ]; then
      echo "Failed to create status for '${API_BASE}/commits/${COMMIT_SHA}'"
      echo -e "Request returned:\n$response"
      exit 3
    fi
else
  echo "No status updates needed."
fi