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#!/usr/bin/env -S deno run --allow-read=. --allow-run=git// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { getSources, ROOT_PATH } from "./util.js";
const copyrightYear = 2024;
const buffer = new Uint8Array(1024);const textDecoder = new TextDecoder();
async function readFirstPartOfFile(filePath) {  const file = await Deno.open(filePath, { read: true });  try {    const byteCount = await file.read(buffer);    return textDecoder.decode(buffer.slice(0, byteCount ?? 0));  } finally {    file.close();  }}
export async function checkCopyright() {  const sourceFiles = await getSources(ROOT_PATH, [    // js and ts    "*.js",    "*.ts",    ":!:.github/mtime_cache/action.js",    ":!:tests/testdata/**",    ":!:cli/bench/testdata/**",    ":!:cli/tsc/dts/**",    ":!:cli/tsc/*typescript.js",    ":!:cli/tsc/compiler.d.ts",    ":!:tests/wpt/suite/**",    ":!:cli/tools/init/templates/**",    ":!:tests/unit_node/testdata/**",    ":!:tests/node_compat/test/**",    ":!:cli/tools/bench/mitata.rs",
    // rust    "*.rs",    ":!:ops/optimizer_tests/**",
    // toml    "*Cargo.toml",  ]);
  const errors = [];  const sourceFilesSet = new Set(sourceFiles);  const ERROR_MSG = "Copyright header is missing: ";
  // Acceptable content before the copyright line  const ACCEPTABLE_LINES =    /^(\/\/ deno-lint-.*|\/\/ Copyright.*|\/\/ Ported.*|\s*|#!\/.*)\n/;  const COPYRIGHT_LINE =    `Copyright 2018-${copyrightYear} the Deno authors. All rights reserved. MIT license.`;  const TOML_COPYRIGHT_LINE = "# " + COPYRIGHT_LINE;  const C_STYLE_COPYRIGHT_LINE = "// " + COPYRIGHT_LINE;
  for (const file of sourceFilesSet) {    const fileText = await readFirstPartOfFile(file);    if (file.endsWith("Cargo.toml")) {      if (        !fileText.startsWith(TOML_COPYRIGHT_LINE)      ) {        errors.push(ERROR_MSG + file);      }      continue;    }
    if (      !fileText.startsWith(C_STYLE_COPYRIGHT_LINE)    ) {      let trimmedText = fileText;      // Attempt to trim accceptable lines      while (        ACCEPTABLE_LINES.test(trimmedText) &&        !trimmedText.startsWith(C_STYLE_COPYRIGHT_LINE)      ) {        trimmedText = trimmedText.split("\n").slice(1).join("\n");      }      if (        !trimmedText.startsWith(C_STYLE_COPYRIGHT_LINE)      ) {        errors.push(          `${ERROR_MSG}${file} (incorrect line is '${            trimmedText.split("\n", 1)          }')`,        );      }    }  }
  // check the main license file  const licenseText = Deno.readTextFileSync(ROOT_PATH + "/LICENSE.md");  if (    !licenseText.includes(`Copyright 2018-${copyrightYear} the Deno authors`)  ) {    errors.push(`LICENSE.md has old copyright year`);  }
  if (errors.length > 0) {    // show all the errors at the same time to prevent overlap with    // other running scripts that may be outputting    console.error(errors.join("\n"));    throw new Error(`Copyright checker had ${errors.length} errors.`);  }}
if (import.meta.main) {  await checkCopyright();}