grafana/scripts/check-breaking-changes.sh

#!/usr/bin/env bash

# Find existing packages using Lerna
PACKAGES=$(lerna list -p -l)
EXIT_CODE=0
GITHUB_MESSAGE=""

# Loop through the packages
while IFS= read -r line; do

    # Read package info
    IFS=':' read -ra ADDR <<< "$line"
    PACKAGE_PATH="${ADDR[0]}"
    PACKAGE_NAME="${ADDR[1]}"

    # Calculate current and previous package paths / names
    PREV="$PACKAGE_NAME@canary"
    CURRENT="$PACKAGE_PATH/dist/"

    # Temporarily skipping @grafana/toolkit, as it doesn't have any exposed static typing
    if [[ "$PACKAGE_NAME" == '@grafana/toolkit' ]]; then
        continue
    fi


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

    # Check if the comparison returned with a non-zero exit code
    # Record the output, maybe with some additional information
    STATUS=$?

    # 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}**\\\`${PACKAGE_NAME}\\\`** has possible breaking changes ([more info](${GITHUB_JOB_LINK}#step:${GITHUB_STEP_NUMBER}:1))<br />"    
    fi    

done <<< "$PACKAGES"

# "Export" the message to an environment variable that can be used across Github Actions steps
echo "::set-output name=is_breaking::$EXIT_CODE"
echo "::set-output name=message::$GITHUB_MESSAGE"

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