A bash script to parse the JSON output of `rover subgraph check` or `rover graph check`

rover_check_markdown.sh

#! /bin/bash
# This script performs a subgraph check and generates a markdown file from Rover's JSON output

# Change the following line to refer to your graph ref, schema, and subgraph name
CHECK_OUTPUT=$(rover subgraph check my-graph --schema ./products.graphql --name products --output json)

CHECK_SUCCESS=$(echo $CHECK_OUTPUT | jq '.data.success')

if [ $CHECK_SUCCESS = "true" ]; then
  echo "### Check Success"
  echo ""
  echo "#### Change Details"
  echo ""
fi

CHANGES=$(echo "${CHECK_OUTPUT}" | jq '.data.changes')
if [ "$CHANGES" != "null" ]; then
    CHANGE_SIZE=$(echo "${CHECK_OUTPUT}" | jq -r '.data.changes | length')
    if [ "$CHANGE_SIZE" = "0" ]; then
        echo "No changes"
    fi

    if [ "$CHANGE_SIZE" != "0" ]; then
        echo "| Severity | Code | Description |"
        echo "| -------- | ---- | ----------- |"

        for CHANGE in $(echo "${CHECK_OUTPUT}" | jq -r '.data.changes[] | @base64'); do
            _jq() {
              echo ${CHANGE} | base64 -d | jq -r ${1}
            }

            CHANGE_SEVERITY=$(_jq '.severity')
            CHANGE_CODE=$(_jq '.code')
            CHANGE_DESCRIPTION=$(_jq '.description')
            echo "| $CHANGE_SEVERITY | $CHANGE_CODE | $CHANGE_DESCRIPTION |"
        done
    fi
  echo ""
fi

if [ $CHECK_SUCCESS = "false" ]; then
  echo "### Check Failure"
  echo ""
  echo $CHECK_OUTPUT | jq -r '.error.message'
  echo ""
  echo "#### Error Details"
  echo ""
  for BUILD_ERROR in $(echo "${CHECK_OUTPUT}" | jq -r '.error.details.build_errors[] | @base64'); do
    _jq() {
      echo ${BUILD_ERROR} | base64 -d | jq -r ${1}
    }
    BUILD_ERROR_CODE=$(_jq '.code')
    if [ $BUILD_ERROR_CODE != "null" ]; then
      echo -n "$BUILD_ERROR_CODE: "
    else
      echo -n "UNKNOWN: "
    fi

    echo $(_jq '.message')
  done
fi

CHECK_URL=$(echo $CHECK_OUTPUT | jq '.data.target_url')	
if [ $CHECK_URL != null ]; then	
  echo ""	
  echo "See more details in [Apollo Studio]($CHECK_URL)"	
fi

echo ""

come up with this
https://gist.github.com/adiii717/a5428c0f91cb56521d7d5f2f834c7309

### | Severity | Code | Description |
| -------- | ---- | ----------- |
| FAIL | TYPE_REMOVED | type `demo`: removed |
| FAIL | FIELD_REMOVED | type `demo`: field `demo` removed |
| FAIL | FIELD_REMOVED | type `demo`: field `demo` removed |
| FAIL | FIELD_REMOVED | type `demo`: field `demo` removed |
### Check Failure
This operation check has encountered 4 schema changes that would break operations from existing client traffic.

### Status: ❌
StatusCode: E030
Error Message: This operation check has encountered 4 schema changes that would break operations from existing client traffic.

See more details in [Apollo Studio]

and I was on gitlab so this work for me

  - export RESULT=$(curl -s https://gist.githubusercontent.com/adiii717/a5428c0f91cb56521d7d5f2f834c7309/raw/77ab4077617f252ba1a675e77fb67cd284655d93/rover_check_markdown.sh | bash -s -- "rover subgraph check demo@develop -s demo.gql --name demo --output json")
  - echo "${RESULT}" > result.md && export MD_RESULT=$(awk 'ORS="\n\n"' result.md)
  - curl --request POST --header "Content-Type:multipart/form-data" --header "PRIVATE-TOKEN:${GITLAB_TOKEN}" "https://gitlab.com/api/v4/projects/${CI_MERGE_REQUEST_PROJECT_ID}/merge_requests/${CI_MERGE_REQUEST_IID}/notes?body"  -d  "body=$MD_RESULT"