172 lines
21 KiB
JavaScript
172 lines
21 KiB
JavaScript
'use strict';
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var _minimatch = require('minimatch');var _minimatch2 = _interopRequireDefault(_minimatch);
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var _contextCompat = require('eslint-module-utils/contextCompat');
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var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { 'default': obj };}
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/**
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* @param {MemberExpression} memberExpression
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* @returns {string} the name of the member in the object expression, e.g. the `x` in `namespace.x`
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*/
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function getMemberPropertyName(memberExpression) {
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return memberExpression.property.type === 'Identifier' ?
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memberExpression.property.name :
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memberExpression.property.value;
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}
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/**
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* @param {ScopeManager} scopeManager
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* @param {ASTNode} node
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* @return {Set<string>}
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*/ /**
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* @fileoverview Rule to disallow namespace import
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* @author Radek Benkel
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*/function getVariableNamesInScope(scopeManager, node) {var currentNode = node;var scope = scopeManager.acquire(currentNode);
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while (scope == null) {
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currentNode = currentNode.parent;
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scope = scopeManager.acquire(currentNode, true);
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}
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return new Set(scope.variables.concat(scope.upper.variables).map(function (variable) {return variable.name;}));
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}
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/**
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*
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* @param {*} names
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* @param {*} nameConflicts
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* @param {*} namespaceName
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*/
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function generateLocalNames(names, nameConflicts, namespaceName) {
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var localNames = {};
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names.forEach(function (name) {
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var localName = void 0;
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if (!nameConflicts[name].has(name)) {
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localName = name;
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} else if (!nameConflicts[name].has(String(namespaceName) + '_' + String(name))) {
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localName = String(namespaceName) + '_' + String(name);
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} else {
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for (var i = 1; i < Infinity; i++) {
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if (!nameConflicts[name].has(String(namespaceName) + '_' + String(name) + '_' + String(i))) {
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localName = String(namespaceName) + '_' + String(name) + '_' + String(i);
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break;
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}
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}
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}
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localNames[name] = localName;
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});
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return localNames;
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}
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/**
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* @param {Identifier[]} namespaceIdentifiers
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* @returns {boolean} `true` if the namespace variable is more than just a glorified constant
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*/
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function usesNamespaceAsObject(namespaceIdentifiers) {
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return !namespaceIdentifiers.every(function (identifier) {
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var parent = identifier.parent;
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// `namespace.x` or `namespace['x']`
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return (
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parent &&
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parent.type === 'MemberExpression' && (
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parent.property.type === 'Identifier' || parent.property.type === 'Literal'));
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});
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}
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module.exports = {
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meta: {
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type: 'suggestion',
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docs: {
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category: 'Style guide',
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description: 'Forbid namespace (a.k.a. "wildcard" `*`) imports.',
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url: (0, _docsUrl2['default'])('no-namespace') },
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fixable: 'code',
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schema: [{
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type: 'object',
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properties: {
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ignore: {
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type: 'array',
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items: {
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type: 'string' },
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uniqueItems: true } } }] },
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create: function () {function create(context) {
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var firstOption = context.options[0] || {};
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var ignoreGlobs = firstOption.ignore;
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return {
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ImportNamespaceSpecifier: function () {function ImportNamespaceSpecifier(node) {
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if (ignoreGlobs && ignoreGlobs.find(function (glob) {return (0, _minimatch2['default'])(node.parent.source.value, glob, { matchBase: true });})) {
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return;
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}
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var scopeVariables = (0, _contextCompat.getScope)(context, node).variables;
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var namespaceVariable = scopeVariables.find(function (variable) {return variable.defs[0].node === node;});
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var namespaceReferences = namespaceVariable.references;
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var namespaceIdentifiers = namespaceReferences.map(function (reference) {return reference.identifier;});
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var canFix = namespaceIdentifiers.length > 0 && !usesNamespaceAsObject(namespaceIdentifiers);
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context.report({
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node: node,
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message: 'Unexpected namespace import.',
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fix: canFix && function (fixer) {var _getSourceCode =
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(0, _contextCompat.getSourceCode)(context),scopeManager = _getSourceCode.scopeManager;
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var fixes = [];
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// Pass 1: Collect variable names that are already in scope for each reference we want
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// to transform, so that we can be sure that we choose non-conflicting import names
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var importNameConflicts = {};
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namespaceIdentifiers.forEach(function (identifier) {
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var parent = identifier.parent;
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if (parent && parent.type === 'MemberExpression') {
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var importName = getMemberPropertyName(parent);
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var localConflicts = getVariableNamesInScope(scopeManager, parent);
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if (!importNameConflicts[importName]) {
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importNameConflicts[importName] = localConflicts;
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} else {
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localConflicts.forEach(function (c) {return importNameConflicts[importName].add(c);});
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}
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}
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});
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// Choose new names for each import
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var importNames = Object.keys(importNameConflicts);
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var importLocalNames = generateLocalNames(
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importNames,
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importNameConflicts,
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namespaceVariable.name);
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// Replace the ImportNamespaceSpecifier with a list of ImportSpecifiers
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var namedImportSpecifiers = importNames.map(function (importName) {return importName === importLocalNames[importName] ?
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importName : String(
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importName) + ' as ' + String(importLocalNames[importName]);});
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fixes.push(fixer.replaceText(node, '{ ' + String(namedImportSpecifiers.join(', ')) + ' }'));
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// Pass 2: Replace references to the namespace with references to the named imports
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namespaceIdentifiers.forEach(function (identifier) {
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var parent = identifier.parent;
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if (parent && parent.type === 'MemberExpression') {
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var importName = getMemberPropertyName(parent);
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fixes.push(fixer.replaceText(parent, importLocalNames[importName]));
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}
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});
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return fixes;
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} });
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}return ImportNamespaceSpecifier;}() };
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}return create;}() };
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//# 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* @fileoverview Rule to disallow namespace import\n * @author Radek Benkel\n */\n\nimport minimatch from 'minimatch';\nimport { getScope, getSourceCode } from 'eslint-module-utils/contextCompat';\n\nimport docsUrl from '../docsUrl';\n\n/**\n * @param {MemberExpression} memberExpression\n * @returns {string} the name of the member in the object expression, e.g. the `x` in `namespace.x`\n */\nfunction getMemberPropertyName(memberExpression) {\n  return memberExpression.property.type === 'Identifier'\n    ? memberExpression.property.name\n    : memberExpression.property.value;\n}\n\n/**\n * @param {ScopeManager} scopeManager\n * @param {ASTNode} node\n * @return {Set<string>}\n */\nfunction getVariableNamesInScope(scopeManager, node) {\n  let currentNode = node;\n  let scope = scopeManager.acquire(currentNode);\n  while (scope == null) {\n    currentNode = currentNode.parent;\n    scope = scopeManager.acquire(currentNode, true);\n  }\n  return new Set(scope.variables.concat(scope.upper.variables).map((variable) => variable.name));\n}\n\n/**\n *\n * @param {*} names\n * @param {*} nameConflicts\n * @param {*} namespaceName\n */\nfunction generateLocalNames(names, nameConflicts, namespaceName) {\n  const localNames = {};\n  names.forEach((name) => {\n    let localName;\n    if (!nameConflicts[name].has(name)) {\n      localName = name;\n    } else if (!nameConflicts[name].has(`${namespaceName}_${name}`)) {\n      localName = `${namespaceName}_${name}`;\n    } else {\n      for (let i = 1; i < Infinity; i++) {\n        if (!nameConflicts[name].has(`${namespaceName}_${name}_${i}`)) {\n          localName = `${namespaceName}_${name}_${i}`;\n          break;\n        }\n      }\n    }\n    localNames[name] = localName;\n  });\n  return localNames;\n}\n\n/**\n * @param {Identifier[]} namespaceIdentifiers\n * @returns {boolean} `true` if the namespace variable is more than just a glorified constant\n */\nfunction usesNamespaceAsObject(namespaceIdentifiers) {\n  return !namespaceIdentifiers.every((identifier) => {\n    const parent = identifier.parent;\n\n    // `namespace.x` or `namespace['x']`\n    return (\n      parent\n      && parent.type === 'MemberExpression'\n      && (parent.property.type === 'Identifier' || parent.property.type === 'Literal')\n    );\n  });\n}\n\nmodule.exports = {\n  meta: {\n    type: 'suggestion',\n    docs: {\n      category: 'Style guide',\n      description: 'Forbid namespace (a.k.a. \"wildcard\" `*`) imports.',\n      url: docsUrl('no-namespace'),\n    },\n    fixable: 'code',\n    schema: [{\n      type: 'object',\n      properties: {\n        ignore: {\n          type: 'array',\n          items: {\n            type: 'string',\n          },\n          uniqueItems: true,\n        },\n      },\n    }],\n  },\n\n  create(context) {\n    const firstOption = context.options[0] || {};\n    const ignoreGlobs = firstOption.ignore;\n\n    return {\n      ImportNamespaceSpecifier(node) {\n        if (ignoreGlobs && ignoreGlobs.find((glob) => minimatch(node.parent.source.value, glob, { matchBase: true }))) {\n          return;\n        }\n\n        const scopeVariables = getScope(context, node).variables;\n        const namespaceVariable = scopeVariables.find((variable) => variable.defs[0].node === node);\n        const namespaceReferences = namespaceVariable.references;\n        const namespaceIdentifiers = namespaceReferences.map((reference) => reference.identifier);\n        const canFix = namespaceIdentifiers.length > 0 && !usesNamespaceAsObject(namespaceIdentifiers);\n\n        context.report({\n          node,\n          message: `Unexpected namespace import.`,\n          fix: canFix && ((fixer) => {\n            const { scopeManager } = getSourceCode(context);\n            const fixes = [];\n\n            // Pass 1: Collect variable names that are already in scope for each reference we want\n            // to transform, so that we can be sure that we choose non-conflicting import names\n            const importNameConflicts = {};\n            namespaceIdentifiers.forEach((identifier) => {\n              const parent = identifier.parent;\n              if (parent && parent.type === 'MemberExpression') {\n                const importName = getMemberPropertyName(parent);\n                const localConflicts = getVariableNamesInScope(scopeManager, parent);\n                if (!importNameConflicts[importName]) {\n                  importNameConflicts[importName] = localConflicts;\n                } else {\n                  localConflicts.forEach((c) => importNameConflicts[importName].add(c));\n                }\n              }\n            });\n\n            // Choose new names for each import\n            const importNames = Object.keys(importNameConflicts);\n            const importLocalNames = generateLocalNames(\n              importNames,\n              importNameConflicts,\n              namespaceVariable.name,\n            );\n\n            // Replace the ImportNamespaceSpecifier with a list of ImportSpecifiers\n            const namedImportSpecifiers = importNames.map((importName) => importName === importLocalNames[importName]\n              ? importName\n              : `${importName} as ${importLocalNames[importName]}`,\n            );\n            fixes.push(fixer.replaceText(node, `{ ${namedImportSpecifiers.join(', ')} }`));\n\n            // Pass 2: Replace references to the namespace with references to the named imports\n            namespaceIdentifiers.forEach((identifier) => {\n              const parent = identifier.parent;\n              if (parent && parent.type === 'MemberExpression') {\n                const importName = getMemberPropertyName(parent);\n                fixes.push(fixer.replaceText(parent, importLocalNames[importName]));\n              }\n            });\n\n            return fixes;\n          }),\n        });\n      },\n    };\n  },\n};\n"]}
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