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Diffstat (limited to 'node_modules/webpack/lib/optimize/InnerGraphPlugin.js')
| -rw-r--r-- | node_modules/webpack/lib/optimize/InnerGraphPlugin.js | 377 |
1 files changed, 0 insertions, 377 deletions
diff --git a/node_modules/webpack/lib/optimize/InnerGraphPlugin.js b/node_modules/webpack/lib/optimize/InnerGraphPlugin.js deleted file mode 100644 index f541030a..00000000 --- a/node_modules/webpack/lib/optimize/InnerGraphPlugin.js +++ /dev/null @@ -1,377 +0,0 @@ -/* - MIT License http://www.opensource.org/licenses/mit-license.php - Author Tobias Koppers @sokra -*/ - -"use strict"; - -const { - JAVASCRIPT_MODULE_TYPE_AUTO, - JAVASCRIPT_MODULE_TYPE_ESM -} = require("../ModuleTypeConstants"); -const PureExpressionDependency = require("../dependencies/PureExpressionDependency"); -const InnerGraph = require("./InnerGraph"); - -/** @typedef {import("estree").ClassDeclaration} ClassDeclarationNode */ -/** @typedef {import("estree").ClassExpression} ClassExpressionNode */ -/** @typedef {import("estree").Node} Node */ -/** @typedef {import("estree").VariableDeclarator} VariableDeclaratorNode */ -/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */ -/** @typedef {import("../Compiler")} Compiler */ -/** @typedef {import("../Dependency")} Dependency */ -/** @typedef {import("../dependencies/HarmonyImportSpecifierDependency")} HarmonyImportSpecifierDependency */ -/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */ -/** @typedef {import("./InnerGraph").InnerGraph} InnerGraph */ -/** @typedef {import("./InnerGraph").TopLevelSymbol} TopLevelSymbol */ - -const { topLevelSymbolTag } = InnerGraph; - -const PLUGIN_NAME = "InnerGraphPlugin"; - -class InnerGraphPlugin { - /** - * Apply the plugin - * @param {Compiler} compiler the compiler instance - * @returns {void} - */ - apply(compiler) { - compiler.hooks.compilation.tap( - PLUGIN_NAME, - (compilation, { normalModuleFactory }) => { - const logger = compilation.getLogger("webpack.InnerGraphPlugin"); - - compilation.dependencyTemplates.set( - PureExpressionDependency, - new PureExpressionDependency.Template() - ); - - /** - * @param {JavascriptParser} parser the parser - * @param {JavascriptParserOptions} parserOptions options - * @returns {void} - */ - const handler = (parser, parserOptions) => { - const onUsageSuper = sup => { - InnerGraph.onUsage(parser.state, usedByExports => { - switch (usedByExports) { - case undefined: - case true: - return; - default: { - const dep = new PureExpressionDependency(sup.range); - dep.loc = sup.loc; - dep.usedByExports = usedByExports; - parser.state.module.addDependency(dep); - break; - } - } - }); - }; - - parser.hooks.program.tap(PLUGIN_NAME, () => { - InnerGraph.enable(parser.state); - }); - - parser.hooks.finish.tap(PLUGIN_NAME, () => { - if (!InnerGraph.isEnabled(parser.state)) return; - - logger.time("infer dependency usage"); - InnerGraph.inferDependencyUsage(parser.state); - logger.timeAggregate("infer dependency usage"); - }); - - // During prewalking the following datastructures are filled with - // nodes that have a TopLevelSymbol assigned and - // variables are tagged with the assigned TopLevelSymbol - - // We differ 3 types of nodes: - // 1. full statements (export default, function declaration) - // 2. classes (class declaration, class expression) - // 3. variable declarators (const x = ...) - - /** @type {WeakMap<Node, TopLevelSymbol>} */ - const statementWithTopLevelSymbol = new WeakMap(); - /** @type {WeakMap<Node, Node>} */ - const statementPurePart = new WeakMap(); - - /** @type {WeakMap<ClassExpressionNode | ClassDeclarationNode, TopLevelSymbol>} */ - const classWithTopLevelSymbol = new WeakMap(); - - /** @type {WeakMap<VariableDeclaratorNode, TopLevelSymbol>} */ - const declWithTopLevelSymbol = new WeakMap(); - /** @type {WeakSet<VariableDeclaratorNode>} */ - const pureDeclarators = new WeakSet(); - - // The following hooks are used during prewalking: - - parser.hooks.preStatement.tap(PLUGIN_NAME, statement => { - if (!InnerGraph.isEnabled(parser.state)) return; - - if (parser.scope.topLevelScope === true) { - if (statement.type === "FunctionDeclaration") { - const name = statement.id ? statement.id.name : "*default*"; - const fn = InnerGraph.tagTopLevelSymbol(parser, name); - statementWithTopLevelSymbol.set(statement, fn); - return true; - } - } - }); - - parser.hooks.blockPreStatement.tap(PLUGIN_NAME, statement => { - if (!InnerGraph.isEnabled(parser.state)) return; - - if (parser.scope.topLevelScope === true) { - if ( - statement.type === "ClassDeclaration" && - parser.isPure(statement, statement.range[0]) - ) { - const name = statement.id ? statement.id.name : "*default*"; - const fn = InnerGraph.tagTopLevelSymbol(parser, name); - classWithTopLevelSymbol.set(statement, fn); - return true; - } - if (statement.type === "ExportDefaultDeclaration") { - const name = "*default*"; - const fn = InnerGraph.tagTopLevelSymbol(parser, name); - const decl = statement.declaration; - if ( - (decl.type === "ClassExpression" || - decl.type === "ClassDeclaration") && - parser.isPure(decl, decl.range[0]) - ) { - classWithTopLevelSymbol.set(decl, fn); - } else if (parser.isPure(decl, statement.range[0])) { - statementWithTopLevelSymbol.set(statement, fn); - if ( - !decl.type.endsWith("FunctionExpression") && - !decl.type.endsWith("Declaration") && - decl.type !== "Literal" - ) { - statementPurePart.set(statement, decl); - } - } - } - } - }); - - parser.hooks.preDeclarator.tap(PLUGIN_NAME, (decl, statement) => { - if (!InnerGraph.isEnabled(parser.state)) return; - if ( - parser.scope.topLevelScope === true && - decl.init && - decl.id.type === "Identifier" - ) { - const name = decl.id.name; - if ( - decl.init.type === "ClassExpression" && - parser.isPure(decl.init, decl.id.range[1]) - ) { - const fn = InnerGraph.tagTopLevelSymbol(parser, name); - classWithTopLevelSymbol.set(decl.init, fn); - } else if (parser.isPure(decl.init, decl.id.range[1])) { - const fn = InnerGraph.tagTopLevelSymbol(parser, name); - declWithTopLevelSymbol.set(decl, fn); - if ( - !decl.init.type.endsWith("FunctionExpression") && - decl.init.type !== "Literal" - ) { - pureDeclarators.add(decl); - } - return true; - } - } - }); - - // During real walking we set the TopLevelSymbol state to the assigned - // TopLevelSymbol by using the fill datastructures. - - // In addition to tracking TopLevelSymbols, we sometimes need to - // add a PureExpressionDependency. This is needed to skip execution - // of pure expressions, even when they are not dropped due to - // minimizing. Otherwise symbols used there might not exist anymore - // as they are removed as unused by this optimization - - // When we find a reference to a TopLevelSymbol, we register a - // TopLevelSymbol dependency from TopLevelSymbol in state to the - // referenced TopLevelSymbol. This way we get a graph of all - // TopLevelSymbols. - - // The following hooks are called during walking: - - parser.hooks.statement.tap(PLUGIN_NAME, statement => { - if (!InnerGraph.isEnabled(parser.state)) return; - if (parser.scope.topLevelScope === true) { - InnerGraph.setTopLevelSymbol(parser.state, undefined); - - const fn = statementWithTopLevelSymbol.get(statement); - if (fn) { - InnerGraph.setTopLevelSymbol(parser.state, fn); - const purePart = statementPurePart.get(statement); - if (purePart) { - InnerGraph.onUsage(parser.state, usedByExports => { - switch (usedByExports) { - case undefined: - case true: - return; - default: { - const dep = new PureExpressionDependency( - purePart.range - ); - dep.loc = statement.loc; - dep.usedByExports = usedByExports; - parser.state.module.addDependency(dep); - break; - } - } - }); - } - } - } - }); - - parser.hooks.classExtendsExpression.tap( - PLUGIN_NAME, - (expr, statement) => { - if (!InnerGraph.isEnabled(parser.state)) return; - if (parser.scope.topLevelScope === true) { - const fn = classWithTopLevelSymbol.get(statement); - if ( - fn && - parser.isPure( - expr, - statement.id ? statement.id.range[1] : statement.range[0] - ) - ) { - InnerGraph.setTopLevelSymbol(parser.state, fn); - onUsageSuper(expr); - } - } - } - ); - - parser.hooks.classBodyElement.tap( - PLUGIN_NAME, - (element, classDefinition) => { - if (!InnerGraph.isEnabled(parser.state)) return; - if (parser.scope.topLevelScope === true) { - const fn = classWithTopLevelSymbol.get(classDefinition); - if (fn) { - InnerGraph.setTopLevelSymbol(parser.state, undefined); - } - } - } - ); - - parser.hooks.classBodyValue.tap( - PLUGIN_NAME, - (expression, element, classDefinition) => { - if (!InnerGraph.isEnabled(parser.state)) return; - if (parser.scope.topLevelScope === true) { - const fn = classWithTopLevelSymbol.get(classDefinition); - if (fn) { - if ( - !element.static || - parser.isPure( - expression, - element.key ? element.key.range[1] : element.range[0] - ) - ) { - InnerGraph.setTopLevelSymbol(parser.state, fn); - if (element.type !== "MethodDefinition" && element.static) { - InnerGraph.onUsage(parser.state, usedByExports => { - switch (usedByExports) { - case undefined: - case true: - return; - default: { - const dep = new PureExpressionDependency( - expression.range - ); - dep.loc = expression.loc; - dep.usedByExports = usedByExports; - parser.state.module.addDependency(dep); - break; - } - } - }); - } - } else { - InnerGraph.setTopLevelSymbol(parser.state, undefined); - } - } - } - } - ); - - parser.hooks.declarator.tap(PLUGIN_NAME, (decl, statement) => { - if (!InnerGraph.isEnabled(parser.state)) return; - const fn = declWithTopLevelSymbol.get(decl); - - if (fn) { - InnerGraph.setTopLevelSymbol(parser.state, fn); - if (pureDeclarators.has(decl)) { - if (decl.init.type === "ClassExpression") { - if (decl.init.superClass) { - onUsageSuper(decl.init.superClass); - } - } else { - InnerGraph.onUsage(parser.state, usedByExports => { - switch (usedByExports) { - case undefined: - case true: - return; - default: { - const dep = new PureExpressionDependency( - decl.init.range - ); - dep.loc = decl.loc; - dep.usedByExports = usedByExports; - parser.state.module.addDependency(dep); - break; - } - } - }); - } - } - parser.walkExpression(decl.init); - InnerGraph.setTopLevelSymbol(parser.state, undefined); - return true; - } - }); - - parser.hooks.expression - .for(topLevelSymbolTag) - .tap(PLUGIN_NAME, () => { - const topLevelSymbol = /** @type {TopLevelSymbol} */ ( - parser.currentTagData - ); - const currentTopLevelSymbol = InnerGraph.getTopLevelSymbol( - parser.state - ); - InnerGraph.addUsage( - parser.state, - topLevelSymbol, - currentTopLevelSymbol || true - ); - }); - parser.hooks.assign.for(topLevelSymbolTag).tap(PLUGIN_NAME, expr => { - if (!InnerGraph.isEnabled(parser.state)) return; - if (expr.operator === "=") return true; - }); - }; - normalModuleFactory.hooks.parser - .for(JAVASCRIPT_MODULE_TYPE_AUTO) - .tap(PLUGIN_NAME, handler); - normalModuleFactory.hooks.parser - .for(JAVASCRIPT_MODULE_TYPE_ESM) - .tap(PLUGIN_NAME, handler); - - compilation.hooks.finishModules.tap(PLUGIN_NAME, () => { - logger.timeAggregateEnd("infer dependency usage"); - }); - } - ); - } -} - -module.exports = InnerGraphPlugin; |