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6 | "use strict";
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7 |
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8 | const RequireEnsureDependenciesBlock = require("./RequireEnsureDependenciesBlock");
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9 | const RequireEnsureDependency = require("./RequireEnsureDependency");
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10 | const RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
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11 | const getFunctionExpression = require("./getFunctionExpression");
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12 |
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13 | module.exports = class RequireEnsureDependenciesBlockParserPlugin {
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14 | apply(parser) {
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15 | parser.hooks.call
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16 | .for("require.ensure")
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17 | .tap("RequireEnsureDependenciesBlockParserPlugin", expr => {
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18 | let chunkName = null;
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19 | let errorExpressionArg = null;
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20 | let errorExpression = null;
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21 | switch (expr.arguments.length) {
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22 | case 4: {
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23 | const chunkNameExpr = parser.evaluateExpression(expr.arguments[3]);
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24 | if (!chunkNameExpr.isString()) return;
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25 | chunkName = chunkNameExpr.string;
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26 | }
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27 |
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28 | case 3: {
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29 | errorExpressionArg = expr.arguments[2];
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30 | errorExpression = getFunctionExpression(errorExpressionArg);
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31 |
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32 | if (!errorExpression && !chunkName) {
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33 | const chunkNameExpr = parser.evaluateExpression(
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34 | expr.arguments[2]
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35 | );
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36 | if (!chunkNameExpr.isString()) return;
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37 | chunkName = chunkNameExpr.string;
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38 | }
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39 | }
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40 |
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41 | case 2: {
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42 | const dependenciesExpr = parser.evaluateExpression(
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43 | expr.arguments[0]
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44 | );
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45 | const dependenciesItems = dependenciesExpr.isArray()
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46 | ? dependenciesExpr.items
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47 | : [dependenciesExpr];
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48 | const successExpressionArg = expr.arguments[1];
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49 | const successExpression =
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50 | getFunctionExpression(successExpressionArg);
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51 |
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52 | if (successExpression) {
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53 | parser.walkExpressions(successExpression.expressions);
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54 | }
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55 | if (errorExpression) {
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56 | parser.walkExpressions(errorExpression.expressions);
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57 | }
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58 |
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59 | const depBlock = new RequireEnsureDependenciesBlock(
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60 | chunkName,
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61 | expr.loc
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62 | );
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63 | const errorCallbackExists =
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64 | expr.arguments.length === 4 ||
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65 | (!chunkName && expr.arguments.length === 3);
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66 | const dep = new RequireEnsureDependency(
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67 | expr.range,
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68 | expr.arguments[1].range,
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69 | errorCallbackExists && expr.arguments[2].range
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70 | );
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71 | dep.loc = expr.loc;
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72 | depBlock.addDependency(dep);
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73 | const old = parser.state.current;
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74 | parser.state.current = depBlock;
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75 | try {
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76 | let failed = false;
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77 | parser.inScope([], () => {
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78 | for (const ee of dependenciesItems) {
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79 | if (ee.isString()) {
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80 | const ensureDependency = new RequireEnsureItemDependency(
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81 | ee.string
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82 | );
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83 | ensureDependency.loc = ee.loc || expr.loc;
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84 | depBlock.addDependency(ensureDependency);
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85 | } else {
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86 | failed = true;
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87 | }
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88 | }
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89 | });
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90 | if (failed) {
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91 | return;
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92 | }
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93 | if (successExpression) {
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94 | if (successExpression.fn.body.type === "BlockStatement") {
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95 | parser.walkStatement(successExpression.fn.body);
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96 | } else {
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97 | parser.walkExpression(successExpression.fn.body);
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98 | }
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99 | }
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100 | old.addBlock(depBlock);
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101 | } finally {
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102 | parser.state.current = old;
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103 | }
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104 | if (!successExpression) {
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105 | parser.walkExpression(successExpressionArg);
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106 | }
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107 | if (errorExpression) {
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108 | if (errorExpression.fn.body.type === "BlockStatement") {
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109 | parser.walkStatement(errorExpression.fn.body);
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110 | } else {
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111 | parser.walkExpression(errorExpression.fn.body);
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112 | }
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113 | } else if (errorExpressionArg) {
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114 | parser.walkExpression(errorExpressionArg);
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115 | }
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116 | return true;
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117 | }
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118 | }
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119 | });
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120 | }
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121 | };
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