Get a Spinnaker session cookie when using MS OAuth

spinnaker-session-token-ms.sh

echo "Authorizing with MS"
curl -s --request POST \
  --url https://login.microsoftonline.com/$AZURE_TENANT_ID/oauth2/token \
  --header 'content-type: application/x-www-form-urlencoded' \
  --data-urlencode "grant_type=password" \
  --data-urlencode "resource=https://graph.windows.net" \
  --data-urlencode "client_id=$SPINNAKER_CLIENT_ID" \
  --data-urlencode "password=$BUILD_PASSWORD" \
  --data-urlencode "client_secret=$SPINNAKER_CLIENT_SECRET" \
  --data-urlencode "username=$BUILD_USER" \
  > jwt.txt

echo "Extracting MS Access Token"
accessToken=$(cat jwt.txt | jq -r .access_token)

echo "Pinging Spinnaker with MS Access Token"
curl -s -c cookies.jar -L --request GET \
  --url $SPINNAKER_API_URL/credentials \
  --header "authorization: Bearer $accessToken" \
  > /dev/null

apiSession=$(awk '/SESSION/ { print $NF }' cookies.jar)

echo "Using Spinnaker session: $apiSession"