1 | ;
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2 |
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3 | var _docsUrl = require('../docsUrl');
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4 |
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5 | var _docsUrl2 = _interopRequireDefault(_docsUrl);
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6 |
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7 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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8 |
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9 | module.exports = {
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10 | meta: {
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11 | docs: {
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12 | url: (0, _docsUrl2.default)('prefer-default-export')
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13 | }
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14 | },
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15 |
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16 | create: function (context) {
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17 | let specifierExportCount = 0;
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18 | let hasDefaultExport = false;
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19 | let hasStarExport = false;
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20 | let namedExportNode = null;
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21 |
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22 | function captureDeclaration(identifierOrPattern) {
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23 | if (identifierOrPattern.type === 'ObjectPattern') {
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24 | // recursively capture
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25 | identifierOrPattern.properties.forEach(function (property) {
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26 | captureDeclaration(property.value);
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27 | });
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28 | } else {
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29 | // assume it's a single standard identifier
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30 | specifierExportCount++;
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31 | }
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32 | }
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33 |
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34 | return {
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35 | 'ExportDefaultSpecifier': function () {
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36 | hasDefaultExport = true;
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37 | },
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38 |
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39 | 'ExportSpecifier': function (node) {
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40 | if (node.exported.name === 'default') {
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41 | hasDefaultExport = true;
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42 | } else {
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43 | specifierExportCount++;
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44 | namedExportNode = node;
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45 | }
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46 | },
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47 |
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48 | 'ExportNamedDeclaration': function (node) {
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49 | // if there are specifiers, node.declaration should be null
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50 | if (!node.declaration) return;
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51 |
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52 | // don't count flow types exports
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53 | if (node.exportKind === 'type') return;
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54 |
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55 | if (node.declaration.declarations) {
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56 | node.declaration.declarations.forEach(function (declaration) {
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57 | captureDeclaration(declaration.id);
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58 | });
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59 | } else {
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60 | // captures 'export function foo() {}' syntax
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61 | specifierExportCount++;
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62 | }
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63 |
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64 | namedExportNode = node;
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65 | },
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66 |
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67 | 'ExportDefaultDeclaration': function () {
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68 | hasDefaultExport = true;
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69 | },
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70 |
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71 | 'ExportAllDeclaration': function () {
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72 | hasStarExport = true;
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73 | },
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74 |
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75 | 'Program:exit': function () {
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76 | if (specifierExportCount === 1 && !hasDefaultExport && !hasStarExport) {
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77 | context.report(namedExportNode, 'Prefer default export.');
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78 | }
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79 | }
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80 | };
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81 | }
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82 | };
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83 | //# 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