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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const HotModuleReplacementPlugin = require("../HotModuleReplacementPlugin");
const InnerGraph = require("../optimize/InnerGraph");
const ConstDependency = require("./ConstDependency");
const HarmonyAcceptDependency = require("./HarmonyAcceptDependency");
const HarmonyAcceptImportDependency = require("./HarmonyAcceptImportDependency");
const HarmonyExports = require("./HarmonyExports");
const HarmonyImportSideEffectDependency = require("./HarmonyImportSideEffectDependency");
const HarmonyImportSpecifierDependency = require("./HarmonyImportSpecifierDependency");
/** @typedef {import("estree").Identifier} Identifier */
/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
/** @typedef {import("../optimize/InnerGraph").InnerGraph} InnerGraph */
/** @typedef {import("../optimize/InnerGraph").TopLevelSymbol} TopLevelSymbol */
/** @typedef {import("./HarmonyImportDependency")} HarmonyImportDependency */
const harmonySpecifierTag = Symbol("harmony import");
/**
* @typedef {Object} HarmonySettings
* @property {string[]} ids
* @property {string} source
* @property {number} sourceOrder
* @property {string} name
* @property {boolean} await
*/
module.exports = class HarmonyImportDependencyParserPlugin {
constructor(options) {
this.strictExportPresence = options.strictExportPresence;
this.strictThisContextOnImports = options.strictThisContextOnImports;
}
/**
* @param {JavascriptParser} parser the parser
* @returns {void}
*/
apply(parser) {
parser.hooks.isPure
.for("Identifier")
.tap("HarmonyImportDependencyParserPlugin", expression => {
const expr = /** @type {Identifier} */ (expression);
if (
parser.isVariableDefined(expr.name) ||
parser.getTagData(expr.name, harmonySpecifierTag)
) {
return true;
}
});
parser.hooks.import.tap(
"HarmonyImportDependencyParserPlugin",
(statement, source) => {
parser.state.lastHarmonyImportOrder =
(parser.state.lastHarmonyImportOrder || 0) + 1;
const clearDep = new ConstDependency(
parser.isAsiPosition(statement.range[0]) ? ";" : "",
statement.range
);
clearDep.loc = statement.loc;
parser.state.module.addPresentationalDependency(clearDep);
parser.unsetAsiPosition(statement.range[1]);
const sideEffectDep = new HarmonyImportSideEffectDependency(
source,
parser.state.lastHarmonyImportOrder
);
sideEffectDep.loc = statement.loc;
parser.state.module.addDependency(sideEffectDep);
return true;
}
);
parser.hooks.importSpecifier.tap(
"HarmonyImportDependencyParserPlugin",
(statement, source, id, name) => {
const ids = id === null ? [] : [id];
parser.tagVariable(name, harmonySpecifierTag, {
name,
source,
ids,
sourceOrder: parser.state.lastHarmonyImportOrder
});
return true;
}
);
parser.hooks.expression
.for(harmonySpecifierTag)
.tap("HarmonyImportDependencyParserPlugin", expr => {
const settings = /** @type {HarmonySettings} */ (parser.currentTagData);
const dep = new HarmonyImportSpecifierDependency(
settings.source,
settings.sourceOrder,
settings.ids,
settings.name,
expr.range,
this.strictExportPresence
);
dep.shorthand = parser.scope.inShorthand;
dep.directImport = true;
dep.asiSafe = !parser.isAsiPosition(expr.range[0]);
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
InnerGraph.onUsage(parser.state, e => (dep.usedByExports = e));
return true;
});
parser.hooks.expressionMemberChain
.for(harmonySpecifierTag)
.tap("HarmonyImportDependencyParserPlugin", (expr, members) => {
const settings = /** @type {HarmonySettings} */ (parser.currentTagData);
const ids = settings.ids.concat(members);
const dep = new HarmonyImportSpecifierDependency(
settings.source,
settings.sourceOrder,
ids,
settings.name,
expr.range,
this.strictExportPresence
);
dep.asiSafe = !parser.isAsiPosition(expr.range[0]);
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
InnerGraph.onUsage(parser.state, e => (dep.usedByExports = e));
return true;
});
parser.hooks.callMemberChain
.for(harmonySpecifierTag)
.tap("HarmonyImportDependencyParserPlugin", (expr, members) => {
const { arguments: args, callee } = expr;
const settings = /** @type {HarmonySettings} */ (parser.currentTagData);
const ids = settings.ids.concat(members);
const dep = new HarmonyImportSpecifierDependency(
settings.source,
settings.sourceOrder,
ids,
settings.name,
callee.range,
this.strictExportPresence
);
dep.directImport = members.length === 0;
dep.call = true;
dep.asiSafe = !parser.isAsiPosition(callee.range[0]);
// only in case when we strictly follow the spec we need a special case here
dep.namespaceObjectAsContext =
members.length > 0 && this.strictThisContextOnImports;
dep.loc = callee.loc;
parser.state.module.addDependency(dep);
if (args) parser.walkExpressions(args);
InnerGraph.onUsage(parser.state, e => (dep.usedByExports = e));
return true;
});
const { hotAcceptCallback, hotAcceptWithoutCallback } =
HotModuleReplacementPlugin.getParserHooks(parser);
hotAcceptCallback.tap(
"HarmonyImportDependencyParserPlugin",
(expr, requests) => {
if (!HarmonyExports.isEnabled(parser.state)) {
// This is not a harmony module, skip it
return;
}
const dependencies = requests.map(request => {
const dep = new HarmonyAcceptImportDependency(request);
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
return dep;
});
if (dependencies.length > 0) {
const dep = new HarmonyAcceptDependency(
expr.range,
dependencies,
true
);
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
}
}
);
hotAcceptWithoutCallback.tap(
"HarmonyImportDependencyParserPlugin",
(expr, requests) => {
if (!HarmonyExports.isEnabled(parser.state)) {
// This is not a harmony module, skip it
return;
}
const dependencies = requests.map(request => {
const dep = new HarmonyAcceptImportDependency(request);
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
return dep;
});
if (dependencies.length > 0) {
const dep = new HarmonyAcceptDependency(
expr.range,
dependencies,
false
);
dep.loc = expr.loc;
parser.state.module.addDependency(dep);
}
}
);
}
};
module.exports.harmonySpecifierTag = harmonySpecifierTag;