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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/metro/node_modules/hermes-parser/dist

Просмотр файла: getModuleDocblock.js

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 * @format
 */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getModuleDocblock = getModuleDocblock;
exports.parseDocblockString = parseDocblockString;
const DIRECTIVE_REGEX = /^\s*@([a-zA-Z0-9_-]+)( +.+)?$/;

function parseDocblockString(docblock) {
  const directiveLines = docblock.split('\n') // remove the leading " *" from each line
  .map(line => line.trimStart().replace(/^\* ?/, '').trim()).filter(line => line.startsWith('@'));
  const directives = // $FlowExpectedError[incompatible-type] - flow types  this return as {...}
  Object.create(null);

  for (const line of directiveLines) {
    var _match$;

    const match = DIRECTIVE_REGEX.exec(line);

    if (match == null) {
      continue;
    }

    const name = match[1]; // explicitly use an empty string if there's no value
    // this way the array length tracks how many instances of the directive there was

    const value = ((_match$ = match[2]) != null ? _match$ : '').trim();

    if (directives[name]) {
      directives[name].push(value);
    } else {
      directives[name] = [value];
    }
  }

  return directives;
}

function getModuleDocblock(hermesProgram) {
  const docblockNode = (() => {
    if (hermesProgram.type !== 'Program') {
      return null;
    } // $FlowExpectedError[incompatible-type] - escape out of the unsafe hermes types


    const program = hermesProgram;

    if (program.comments.length === 0) {
      return null;
    }

    const firstComment = (() => {
      const first = program.comments[0];

      if (first.type === 'Block') {
        return first;
      }

      if (program.comments.length === 1) {
        return null;
      } // ESLint will always strip out the shebang comment from the code before passing it to the parser
      // https://github.com/eslint/eslint/blob/21d647904dc30f9484b22acdd9243a6d0ecfba38/lib/linter/linter.js#L779
      // this means that we're forced to parse it as a line comment :(
      // this hacks around it by selecting the second comment in this case


      const second = program.comments[1];

      if (first.type === 'Line' && first.range[0] === 0 && second.type === 'Block') {
        return second;
      }

      return null;
    })();

    if (firstComment == null) {
      return null;
    }
    /*
    Handle cases like this where the comment isn't actually the first thing in the code:
    ```
    const x = 1; /* docblock *./
    ```
    */


    if (program.body.length > 0 && program.body[0].range[0] < firstComment.range[0]) {
      return null;
    }

    return firstComment;
  })();

  if (docblockNode == null) {
    return null;
  }

  return {
    directives: parseDocblockString(docblockNode.value),
    comment: docblockNode
  };
}

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