105 lines
14 KiB
JavaScript
105 lines
14 KiB
JavaScript
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'use strict';var _slicedToArray = function () {function sliceIterator(arr, i) {var _arr = [];var _n = true;var _d = false;var _e = undefined;try {for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {_arr.push(_s.value);if (i && _arr.length === i) break;}} catch (err) {_d = true;_e = err;} finally {try {if (!_n && _i["return"]) _i["return"]();} finally {if (_d) throw _e;}}return _arr;}return function (arr, i) {if (Array.isArray(arr)) {return arr;} else if (Symbol.iterator in Object(arr)) {return sliceIterator(arr, i);} else {throw new TypeError("Invalid attempt to destructure non-iterable instance");}};}(); /**
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* @fileOverview Ensures that no imported module imports the linted module.
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* @author Ben Mosher
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*/
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var _ExportMap = require('../ExportMap');var _ExportMap2 = _interopRequireDefault(_ExportMap);
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var _importType = require('../core/importType');
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var _moduleVisitor = require('eslint-module-utils/moduleVisitor');var _moduleVisitor2 = _interopRequireDefault(_moduleVisitor);
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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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// todo: cache cycles / deep relationships for faster repeat evaluation
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module.exports = {
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meta: {
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type: 'suggestion',
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docs: { url: (0, _docsUrl2.default)('no-cycle') },
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schema: [(0, _moduleVisitor.makeOptionsSchema)({
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maxDepth: {
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oneOf: [
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{
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description: 'maximum dependency depth to traverse',
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type: 'integer',
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minimum: 1 },
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{
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enum: ['∞'],
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type: 'string' }] },
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ignoreExternal: {
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description: 'ignore external modules',
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type: 'boolean',
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default: false } })] },
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create: function (context) {
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const myPath = context.getFilename();
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if (myPath === '<text>') return {}; // can't cycle-check a non-file
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const options = context.options[0] || {};
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const maxDepth = typeof options.maxDepth === 'number' ? options.maxDepth : Infinity;
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const ignoreModule = name => options.ignoreExternal ? (0, _importType.isExternalModule)(name) : false;
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function checkSourceValue(sourceNode, importer) {
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if (ignoreModule(sourceNode.value)) {
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return; // ignore external modules
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}
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const imported = _ExportMap2.default.get(sourceNode.value, context);
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if (importer.importKind === 'type') {
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return; // no Flow import resolution
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}
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if (imported == null) {
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return; // no-unresolved territory
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}
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if (imported.path === myPath) {
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return; // no-self-import territory
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}
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const untraversed = [{ mget: () => imported, route: [] }];
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const traversed = new Set();
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function detectCycle(_ref) {let mget = _ref.mget,route = _ref.route;
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const m = mget();
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if (m == null) return;
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if (traversed.has(m.path)) return;
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traversed.add(m.path);
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for (let _ref2 of m.imports) {var _ref3 = _slicedToArray(_ref2, 2);let path = _ref3[0];var _ref3$ = _ref3[1];let getter = _ref3$.getter;let source = _ref3$.source;
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if (path === myPath) return true;
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if (traversed.has(path)) continue;
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if (ignoreModule(source.value)) continue;
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if (route.length + 1 < maxDepth) {
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untraversed.push({
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mget: getter,
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route: route.concat(source) });
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}
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}
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}
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while (untraversed.length > 0) {
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const next = untraversed.shift(); // bfs!
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if (detectCycle(next)) {
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const message = next.route.length > 0 ?
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`Dependency cycle via ${routeString(next.route)}` :
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'Dependency cycle detected.';
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context.report(importer, message);
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return;
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}
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}
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}
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return (0, _moduleVisitor2.default)(checkSourceValue, context.options[0]);
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} };
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function routeString(route) {
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return route.map(s => `${s.value}:${s.loc.start.line}`).join('=>');
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}
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