#!/bin/bash

set -euo pipefail

# This script is used in CircleCI to determine whether there's been changes in the selected file path since the latest base version.

file_path="${1:-}"
if [ -z "$file_path" ]; then
  echo "Error: Path where to check changes not set."
  echo "USAGE: $0 <path>"
  exit 1
fi

latest_base_version=$("$SPLICE_ROOT"/build-tools/find_latest_base_version.sh)

# 'git diff --quiet' exits with 1 if there were differences and 0 means no differences.
if git diff --quiet "$latest_base_version" HEAD "$file_path"; then
    echo "There's been no changes in $file_path since the latest base version ($latest_base_version)."
    exit 0
else
    echo "There's been changes in $file_path since the latest base version ($latest_base_version)."
    exit 1
fi