validate dependabot yaml

validate-dependabot.sh

#!/bin/bash
set -e

YAML=$(cat "${1:-.github/dependabot.yml}")
YAML="${YAML//$'\n'/\\n}"
YAML="${YAML//\"/\\\"}"
JSON="{\"config-file-body\": \"$YAML\"}"
curl -X "POST" "https://api.dependabot.com/config_files/validate" \
     -H 'Host: api.dependabot.com' \
     -H 'Referer: https://dependabot.com/docs/config-file/validator/' \
     -H 'Content-Type: application/json' \
     -H 'Origin: https://dependabot.com' \
     -H 'Connection: keep-alive' \
     -d "$JSON" -s | jq --raw-output $'
   if (.errors | length) != 0
   then "🚫 validation failed\n| title | detail | source |\n| -- | -- | -- |\n" + (.errors | map(@text "| \(.title) | \(.detail) | \(.source.pointer) |") | join("\n"))
   else "✅no validation errors"
   end'