/**
 * @license
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import * as path from "path";
import * as fs from "fs";

export function fail(message: string): never {
  console.error(message);
  process.exit(1);
}

// Bazel params may be surrounded with quotes
function removeSurrondedQuotes(str: string): string {
  return str.startsWith("'") && str.endsWith("'") ?
      str.slice(1, -1) : str;
}

function resolveExecrootPath(filePath: string): string {
  if (path.isAbsolute(filePath)) return filePath;

  const bazelBindir = process.env["BAZEL_BINDIR"];
  if (bazelBindir && process.cwd().endsWith(bazelBindir)) {
    const execroot = process.cwd().slice(0, process.cwd().length - bazelBindir.length);
    return path.join(execroot, filePath);
  }

  return path.join(process.cwd(), filePath);
}

export function readMultilineParamFile(filePath: string): string[] {
  return fs.readFileSync(resolveExecrootPath(filePath), {encoding: 'utf-8'})
      .split(/\r?\n/)
      .filter(f => f.length > 0)
      .map(removeSurrondedQuotes)
      .map(resolveExecrootPath);
}