triangle_old/node_modules/eslint-plugin-import/lib/rules/no-useless-path-segments.js

'use strict';




var _ignore = require('eslint-module-utils/ignore');
var _moduleVisitor = require('eslint-module-utils/moduleVisitor');var _moduleVisitor2 = _interopRequireDefault(_moduleVisitor);
var _resolve = require('eslint-module-utils/resolve');var _resolve2 = _interopRequireDefault(_resolve);
var _path = require('path');var _path2 = _interopRequireDefault(_path);
var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { default: obj };}

/**
                                                                                                                                                                                     * convert a potentially relative path from node utils into a true
                                                                                                                                                                                     * relative path.
                                                                                                                                                                                     *
                                                                                                                                                                                     * ../ -> ..
                                                                                                                                                                                     * ./ -> .
                                                                                                                                                                                     * .foo/bar -> ./.foo/bar
                                                                                                                                                                                     * ..foo/bar -> ./..foo/bar
                                                                                                                                                                                     * foo/bar -> ./foo/bar
                                                                                                                                                                                     *
                                                                                                                                                                                     * @param relativePath {string} relative posix path potentially missing leading './'
                                                                                                                                                                                     * @returns {string} relative posix path that always starts with a ./
                                                                                                                                                                                     **/
function toRelativePath(relativePath) {
  const stripped = relativePath.replace(/\/$/g, ''); // Remove trailing /

  return (/^((\.\.)|(\.))($|\/)/.test(stripped) ? stripped : `./${stripped}`);
} /**
   * @fileOverview Ensures that there are no useless path segments
   * @author Thomas Grainger
   */function normalize(fn) {return toRelativePath(_path2.default.posix.normalize(fn));
}

function countRelativeParents(pathSegments) {
  return pathSegments.reduce((sum, pathSegment) => pathSegment === '..' ? sum + 1 : sum, 0);
}

module.exports = {
  meta: {
    type: 'suggestion',
    docs: {
      url: (0, _docsUrl2.default)('no-useless-path-segments') },


    fixable: 'code',

    schema: [
    {
      type: 'object',
      properties: {
        commonjs: { type: 'boolean' },
        noUselessIndex: { type: 'boolean' } },

      additionalProperties: false }] },




  create(context) {
    const currentDir = _path2.default.dirname(context.getFilename());
    const options = context.options[0];

    function checkSourceValue(source) {const
      importPath = source.value;

      function reportWithProposedPath(proposedPath) {
        context.report({
          node: source,
          // Note: Using messageIds is not possible due to the support for ESLint 2 and 3
          message: `Useless path segments for "${importPath}", should be "${proposedPath}"`,
          fix: fixer => proposedPath && fixer.replaceText(source, JSON.stringify(proposedPath)) });

      }

      // Only relative imports are relevant for this rule --> Skip checking
      if (!importPath.startsWith('.')) {
        return;
      }

      // Report rule violation if path is not the shortest possible
      const resolvedPath = (0, _resolve2.default)(importPath, context);
      const normedPath = normalize(importPath);
      const resolvedNormedPath = (0, _resolve2.default)(normedPath, context);
      if (normedPath !== importPath && resolvedPath === resolvedNormedPath) {
        return reportWithProposedPath(normedPath);
      }

      const fileExtensions = (0, _ignore.getFileExtensions)(context.settings);
      const regexUnnecessaryIndex = new RegExp(
      `.*\\/index(\\${Array.from(fileExtensions).join('|\\')})?$`);


      // Check if path contains unnecessary index (including a configured extension)
      if (options && options.noUselessIndex && regexUnnecessaryIndex.test(importPath)) {
        const parentDirectory = _path2.default.dirname(importPath);

        // Try to find ambiguous imports
        if (parentDirectory !== '.' && parentDirectory !== '..') {
          for (let fileExtension of fileExtensions) {
            if ((0, _resolve2.default)(`${parentDirectory}${fileExtension}`, context)) {
              return reportWithProposedPath(`${parentDirectory}/`);
            }
          }
        }

        return reportWithProposedPath(parentDirectory);
      }

      // Path is shortest possible + starts from the current directory --> Return directly
      if (importPath.startsWith('./')) {
        return;
      }

      // Path is not existing --> Return directly (following code requires path to be defined)
      if (resolvedPath === undefined) {
        return;
      }

      const expected = _path2.default.relative(currentDir, resolvedPath); // Expected import path
      const expectedSplit = expected.split(_path2.default.sep); // Split by / or \ (depending on OS)
      const importPathSplit = importPath.replace(/^\.\//, '').split('/');
      const countImportPathRelativeParents = countRelativeParents(importPathSplit);
      const countExpectedRelativeParents = countRelativeParents(expectedSplit);
      const diff = countImportPathRelativeParents - countExpectedRelativeParents;

      // Same number of relative parents --> Paths are the same --> Return directly
      if (diff <= 0) {
        return;
      }

      // Report and propose minimal number of required relative parents
      return reportWithProposedPath(
      toRelativePath(
      importPathSplit.
      slice(0, countExpectedRelativeParents).
      concat(importPathSplit.slice(countImportPathRelativeParents + diff)).
      join('/')));


    }

    return (0, _moduleVisitor2.default)(checkSourceValue, options);
  } };
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