grafana/scripts/check-breaking-changes.sh

#!/usr/bin/env bash

# Find package directories
PACKAGES=$(ls -d ./packages/*/)
EXIT_CODE=0
GITHUB_MESSAGE=""
SKIP_PACKAGES=("grafana-eslint-rules" "grafana-plugin-configs")

# Loop through the packages
while IFS=" " read -r -a package; do

  # shellcheck disable=SC2128
  PACKAGE_PATH=$(basename "$package")

  # Calculate current and previous package paths / names
  PREV="./base/$PACKAGE_PATH"
  CURRENT="./pr/$PACKAGE_PATH"

  # Temporarily skipping these packages as they don't have any exposed static typing
  if [[ ${SKIP_PACKAGES[@]} =~ "$PACKAGE_PATH" ]]; then
    continue
  fi

  # Extract the npm package tarballs into separate directories e.g. ./base/@grafana-data.tgz -> ./base/grafana-data/
  mkdir "$PREV"
  tar -xf "./base/@$PACKAGE_PATH.tgz" --strip-components=1 -C "$PREV"
  mkdir "$CURRENT"
  tar -xf "./pr/@$PACKAGE_PATH.tgz" --strip-components=1 -C "$CURRENT"

  # Run the comparison and record the exit code
  echo ""
  echo ""
  echo "${PACKAGE_PATH}"
  echo "================================================="
  npm exec -- @grafana/levitate compare --prev "$PREV" --current "$CURRENT" --json >data.json

  # Check if the comparison returned with a non-zero exit code
  # Record the output, maybe with some additional information
  STATUS=$?
  CURRENT_REPORT=$(node ./scripts/levitate-parse-json-report.js)
  # Final exit code
  # (non-zero if any of the packages failed the checks)
  if [ $STATUS -gt 0 ]; then
    EXIT_CODE=1
    GITHUB_MESSAGE="${GITHUB_MESSAGE}**\\\`${PACKAGE_PATH}\\\`** has possible breaking changes ([more info](${GITHUB_JOB_LINK}#step:${GITHUB_STEP_NUMBER}:1))<br />"
    GITHUB_LEVITATE_MARKDOWN+="<h3>${PACKAGE_PATH}</h3>${CURRENT_REPORT}<br>"
  fi

done <<<"$PACKAGES"

# "Export" the message to an environment variable that can be used across Github Actions steps
echo "is_breaking=$EXIT_CODE" >>"$GITHUB_OUTPUT"
echo "message=$GITHUB_MESSAGE" >>"$GITHUB_OUTPUT"
mkdir -p ./levitate
echo $GITHUB_LEVITATE_MARKDOWN >./levitate/levitate.md

# We will exit the workflow accordingly at another step
exit 0