j-gallery
Version:
a picture layout library
640 lines (588 loc) • 22.8 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
;
const Module = require("../Module");
const Template = require("../Template");
const Parser = require("../Parser");
const acorn = require("acorn");
const escope = require("escope");
const ReplaceSource = require("webpack-sources/lib/ReplaceSource");
const ConcatSource = require("webpack-sources/lib/ConcatSource");
const HarmonyImportDependency = require("../dependencies/HarmonyImportDependency");
const HarmonyImportSpecifierDependency = require("../dependencies/HarmonyImportSpecifierDependency");
const HarmonyExportSpecifierDependency = require("../dependencies/HarmonyExportSpecifierDependency");
const HarmonyExportExpressionDependency = require("../dependencies/HarmonyExportExpressionDependency");
const HarmonyExportImportedSpecifierDependency = require("../dependencies/HarmonyExportImportedSpecifierDependency");
const HarmonyCompatibilityDependency = require("../dependencies/HarmonyCompatibilityDependency");
const HarmonyModulesHelpers = require("../dependencies/HarmonyModulesHelpers");
function getFinalName(info, exportName, moduleToInfoMap, requestShortener) {
const directExport = info.exportMap.get(exportName);
if(directExport) {
if(exportName === true)
info.needNamespaceObject = true;
const name = info.internalNames.get(directExport);
if(!name)
throw new Error(`The export "${directExport}" in "${info.module.readableIdentifier(requestShortener)}" has no internal name`);
return name;
}
const reexport = info.reexportMap.get(exportName);
if(reexport) {
const refInfo = moduleToInfoMap.get(reexport.module);
if(refInfo) {
// module is in the concatenation
return getFinalName(refInfo, reexport.exportName, moduleToInfoMap, requestShortener);
} else {
const dep = reexport.dependency;
const importedModule = reexport.module;
const exportName = reexport.exportName;
const isHarmonyModule = importedModule && (!importedModule.meta || importedModule.meta.harmonyModule);
const importedVar = dep.importedVar;
const used = importedModule.isUsed(exportName);
if(!used) return "/* unused reexport */undefined";
if(!isHarmonyModule && exportName === "default") {
return `${importedVar}_default.a`;
}
return `${importedVar}[${JSON.stringify(used)}]`;
}
}
throw new Error(`Cannot get final name for export "${exportName}" in "${info.module.readableIdentifier(requestShortener)}"` +
` (known exports: ${Array.from(info.exportMap.keys()).join(" ")}, ` +
`known reexports: ${Array.from(info.reexportMap.keys()).join(" ")})`);
}
function getSymbolsFromScope(s, untilScope) {
const allUsedNames = new Set();
let scope = s;
while(scope) {
if(untilScope === scope) break;
scope.variables.forEach(variable => allUsedNames.add(variable.name));
scope = scope.upper;
}
return allUsedNames;
}
function getAllReferences(variable) {
let set = variable.references;
// Look for inner scope variables too (like in class Foo { t() { Foo } })
const identifiers = new Set(variable.identifiers);
for(const scope of variable.scope.childScopes) {
for(const innerVar of scope.variables) {
if(innerVar.identifiers.some(id => identifiers.has(id))) {
set = set.concat(innerVar.references);
break;
}
}
}
return set;
}
function reduceSet(a, b) {
for(const item of b)
a.add(item);
return a;
}
function getPathInAst(ast, node) {
if(ast === node) {
return [];
}
const nr = node.range;
var i;
if(Array.isArray(ast)) {
for(i = 0; i < ast.length; i++) {
const enterResult = enterNode(ast[i]);
if(typeof enterResult !== "undefined")
return enterResult;
}
} else if(ast && typeof ast === "object") {
const keys = Object.keys(ast);
for(i = 0; i < keys.length; i++) {
const value = ast[keys[i]];
if(Array.isArray(value)) {
const pathResult = getPathInAst(value, node);
if(typeof pathResult !== "undefined")
return pathResult;
} else if(value && typeof value === "object") {
const enterResult = enterNode(value);
if(typeof enterResult !== "undefined")
return enterResult;
}
}
}
function enterNode(n) {
const r = n.range;
if(r) {
if(r[0] <= nr[0] && r[1] >= nr[1]) {
const path = getPathInAst(n, node);
if(path) {
path.push(n);
return path;
}
}
}
return undefined;
}
}
class ConcatenatedModule extends Module {
constructor(rootModule, modules) {
super();
super.setChunks(rootModule._chunks);
this.rootModule = rootModule;
this.modules = modules;
this.usedExports = rootModule.usedExports;
this.providedExports = rootModule.providedExports;
this.optimizationBailout = rootModule.optimizationBailout;
this.used = rootModule.used;
this.index = rootModule.index;
this.index2 = rootModule.index2;
this.depth = rootModule.depth;
this.built = modules.some(m => m.built);
this.cacheable = modules.every(m => m.cacheable);
const modulesSet = new Set(modules);
this.reasons = rootModule.reasons.filter(reason => !modulesSet.has(reason.module));
this.meta = rootModule.meta;
this.moduleArgument = rootModule.moduleArgument;
this.exportsArgument = rootModule.exportsArgument;
this.strict = true;
this.dependencies = [];
this.dependenciesWarnings = [];
this.dependenciesErrors = [];
this.fileDependencies = [];
this.contextDependencies = [];
this.warnings = [];
this.errors = [];
this.assets = {};
for(const m of modules) {
// populate dependencies
m.dependencies.filter(dep => !modulesSet.has(dep.module))
.forEach(d => this.dependencies.push(d));
// populate dep warning
m.dependenciesWarnings.forEach(depWarning => this.dependenciesWarnings.push(depWarning));
// populate dep errors
m.dependenciesErrors.forEach(depError => this.dependenciesErrors.push(depError));
// populate file dependencies
if(m.fileDependencies) m.fileDependencies.forEach(file => this.fileDependencies.push(file));
// populate context dependencies
if(m.contextDependencies) m.contextDependencies.forEach(context => this.contextDependencies.push(context));
// populate warnings
m.warnings.forEach(warning => this.warnings.push(warning));
// populate errors
m.errors.forEach(error => this.errors.push(error));
Object.assign(this.assets, m.assets);
}
}
identifier() {
return this.modules.map(m => m.identifier()).join(" ");
}
readableIdentifier(requestShortener) {
return this.rootModule.readableIdentifier(requestShortener) + ` + ${this.modules.length - 1} modules`;
}
libIdent(options) {
return this.rootModule.libIdent(options);
}
nameForCondition() {
return this.rootModule.nameForCondition();
}
build(options, compilation, resolver, fs, callback) {
throw new Error("Cannot build this module. It should be already built.");
}
size() {
// Guess size from embedded modules
return this.modules.reduce((sum, m) => sum + m.size(), 0);
}
source(dependencyTemplates, outputOptions, requestShortener) {
const modulesSet = new Set();
this.modules.forEach(m => modulesSet.add(m));
// Metainfo for each module
const modulesWithInfo = this.modules.map((m, idx) => {
const exportMap = new Map();
const reexportMap = new Map();
m.dependencies.forEach(dep => {
if(dep instanceof HarmonyExportSpecifierDependency) {
exportMap.set(dep.name, dep.id);
} else if(dep instanceof HarmonyExportExpressionDependency) {
exportMap.set("default", "__WEBPACK_MODULE_DEFAULT_EXPORT__");
} else if(dep instanceof HarmonyExportImportedSpecifierDependency) {
const exportName = dep.name;
const importName = dep.id;
const importModule = dep.importDependency.module;
const innerReexport = modulesSet.has(importModule);
if(exportName && importName) {
reexportMap.set(exportName, {
module: importModule,
exportName: importName,
dependency: dep
});
} else if(exportName) {
reexportMap.set(exportName, {
module: importModule,
exportName: true,
dependency: dep
});
} else if(Array.isArray(importModule.providedExports)) {
var activeExports = new Set(HarmonyModulesHelpers.getActiveExports(dep.originModule, dep));
importModule.providedExports.forEach(name => {
if(activeExports.has(name) || name === "default")
return;
reexportMap.set(name, {
module: importModule,
exportName: name,
dependency: dep
});
});
} else if(innerReexport) {
throw new Error(`Module "${importModule.readableIdentifier(requestShortener)}" doesn't provide static exports for "export *" in ${m.readableIdentifier(requestShortener)}`);
}
}
});
return {
module: m,
index: idx,
ast: undefined,
source: undefined,
globalScope: undefined,
moduleScope: undefined,
internalNames: new Map(),
exportMap: exportMap,
reexportMap: reexportMap,
needCompatibilityFlag: false,
needNamespaceObject: false,
namespaceObjectSource: null
};
});
// Create mapping from module to info
const moduleToInfoMap = new Map();
modulesWithInfo.forEach(m => moduleToInfoMap.set(m.module, m));
// Configure template decorators for dependencies
const innerDependencyTemplates = new Map(dependencyTemplates);
innerDependencyTemplates.set(HarmonyImportSpecifierDependency, new HarmonyImportSpecifierDependencyConcatenatedTemplate(
dependencyTemplates.get(HarmonyImportSpecifierDependency),
moduleToInfoMap
));
innerDependencyTemplates.set(HarmonyImportDependency, new HarmonyImportDependencyConcatenatedTemplate(
dependencyTemplates.get(HarmonyImportDependency),
moduleToInfoMap
));
innerDependencyTemplates.set(HarmonyExportSpecifierDependency, new HarmonyExportSpecifierDependencyConcatenatedTemplate(
dependencyTemplates.get(HarmonyExportSpecifierDependency),
this.rootModule
));
innerDependencyTemplates.set(HarmonyExportExpressionDependency, new HarmonyExportExpressionDependencyConcatenatedTemplate(
dependencyTemplates.get(HarmonyExportExpressionDependency),
this.rootModule,
moduleToInfoMap
));
innerDependencyTemplates.set(HarmonyExportImportedSpecifierDependency, new HarmonyExportImportedSpecifierDependencyConcatenatedTemplate(
dependencyTemplates.get(HarmonyExportImportedSpecifierDependency),
this.rootModule,
moduleToInfoMap
));
innerDependencyTemplates.set(HarmonyCompatibilityDependency, new HarmonyCompatibilityDependencyConcatenatedTemplate(
dependencyTemplates.get(HarmonyCompatibilityDependency),
this.rootModule,
moduleToInfoMap
));
innerDependencyTemplates.set("hash", innerDependencyTemplates.get("hash") + this.rootModule.identifier());
// Generate source code and analyse scopes
// Prepare a ReplaceSource for the final source
modulesWithInfo.forEach(info => {
const m = info.module;
const source = m.source(innerDependencyTemplates, outputOptions, requestShortener);
const code = source.source();
let ast;
try {
ast = acorn.parse(code, {
ranges: true,
locations: true,
ecmaVersion: Parser.ECMA_VERSION,
sourceType: "module"
});
} catch(err) {
if(err.loc && typeof err.loc === "object" && typeof err.loc.line === "number") {
const lineNumber = err.loc.line;
const lines = code.split("\n");
err.message += "\n| " + lines.slice(Math.max(0, lineNumber - 3), lineNumber + 2).join("\n| ");
}
throw err;
}
const scopeManager = escope.analyze(ast, {
ecmaVersion: 6,
sourceType: "module",
optimistic: true,
ignoreEval: true,
impliedStrict: true
});
const globalScope = scopeManager.acquire(ast);
const moduleScope = globalScope.childScopes[0];
const resultSource = new ReplaceSource(source);
info.ast = ast;
info.source = resultSource;
info.globalScope = globalScope;
info.moduleScope = moduleScope;
});
// List of all used names to avoid conflicts
const allUsedNames = new Set(["__WEBPACK_MODULE_DEFAULT_EXPORT__", "defaultExport", "Object"]);
// get all global names
modulesWithInfo.forEach(info => {
info.globalScope.through.forEach(reference => {
const name = reference.identifier.name;
if(/^__WEBPACK_MODULE_REFERENCE__\d+_(\d+|ns)__$/.test(name)) {
for(const s of getSymbolsFromScope(reference.from, info.moduleScope)) {
allUsedNames.add(s);
}
} else {
allUsedNames.add(name);
}
});
});
modulesWithInfo.forEach(info => {
const namespaceObjectName = this.findNewName("namespaceObject", allUsedNames, null, info.module.readableIdentifier(requestShortener));
allUsedNames.add(namespaceObjectName);
info.internalNames.set(namespaceObjectName, namespaceObjectName);
info.exportMap.set(true, namespaceObjectName);
info.moduleScope.variables.forEach(variable => {
const name = variable.name;
if(allUsedNames.has(name)) {
const references = getAllReferences(variable);
const symbolsInReferences = references.map(ref => getSymbolsFromScope(ref.from, info.moduleScope)).reduce(reduceSet, new Set());
const newName = this.findNewName(name, allUsedNames, symbolsInReferences, info.module.readableIdentifier(requestShortener));
allUsedNames.add(newName);
info.internalNames.set(name, newName);
const source = info.source;
const allIdentifiers = new Set(references.map(r => r.identifier).concat(variable.identifiers));
for(const identifier of allIdentifiers) {
const r = identifier.range;
const path = getPathInAst(info.ast, identifier);
if(path && path.length > 1 && path[1].type === "Property" && path[1].shorthand) {
source.insert(r[1], `: ${newName}`);
} else {
source.replace(r[0], r[1] - 1, newName);
}
}
} else {
allUsedNames.add(name);
info.internalNames.set(name, name);
}
});
});
modulesWithInfo.forEach(info => {
info.globalScope.through.forEach(reference => {
const name = reference.identifier.name;
const match = /^__WEBPACK_MODULE_REFERENCE__(\d+)_(\d+|ns)__$/.exec(name);
if(match) {
const referencedModule = modulesWithInfo[+match[1]];
let exportName;
if(match[2] === "ns") {
exportName = true;
} else {
const exportIdx = +match[2];
exportName = referencedModule.module.providedExports[exportIdx];
}
const finalName = getFinalName(referencedModule, exportName, moduleToInfoMap, requestShortener);
const r = reference.identifier.range;
const source = info.source;
source.replace(r[0], r[1] - 1, finalName);
}
});
});
const result = new ConcatSource();
if(moduleToInfoMap.get(this.rootModule).needCompatibilityFlag) {
result.add(`Object.defineProperty(${this.rootModule.exportsArgument || "exports"}, "__esModule", { value: true });\n`);
}
let generated = true;
const ensureNsObjSource = info => {
if(info.needNamespaceObject && !info.namespaceObjectSource) {
const name = info.exportMap.get(true);
const nsObj = [`var ${name} = {};`];
for(const exportName of info.module.providedExports) {
const finalName = getFinalName(info, exportName, moduleToInfoMap, requestShortener);
nsObj.push(`__webpack_require__.d(${name}, ${JSON.stringify(exportName)}, function() { return ${finalName}; });`);
}
info.namespaceObjectSource = nsObj.join("\n") + "\n";
generated = true;
}
};
while(generated) {
generated = false;
modulesWithInfo.forEach(ensureNsObjSource);
}
modulesWithInfo.forEach(info => {
result.add(`\n// CONCATENATED MODULE: ${info.module.readableIdentifier(requestShortener)}\n`);
if(info.namespaceObjectSource) {
result.add(info.namespaceObjectSource);
}
result.add(info.source);
});
return result;
}
findNewName(oldName, usedNamed1, usedNamed2, extraInfo) {
let name = oldName;
if(name === "__WEBPACK_MODULE_DEFAULT_EXPORT__")
name = "defaultExport";
// Remove uncool stuff
extraInfo = extraInfo.replace(/(\/index)?\.([a-zA-Z0-9]{1,4})$/, "");
const splittedInfo = extraInfo.split("/");
while(splittedInfo.length) {
name = splittedInfo.pop() + "_" + name;
const nameIdent = Template.toIdentifier(name);
if(!usedNamed1.has(nameIdent) && (!usedNamed2 || !usedNamed2.has(nameIdent))) return nameIdent;
}
while(usedNamed1.has(name = name + "_") || (usedNamed2 && usedNamed2.has(name))) { /* do nothing */ }
return name;
}
updateHash(hash) {
for(const m of this.modules) {
m.updateHash(hash);
}
super.updateHash(hash);
}
}
class HarmonyImportSpecifierDependencyConcatenatedTemplate {
constructor(originalTemplate, modulesMap) {
this.originalTemplate = originalTemplate;
this.modulesMap = modulesMap;
}
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
const module = dep.importDependency.module;
const info = this.modulesMap.get(module);
if(!info) {
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
return;
}
if(!Array.isArray(module.providedExports))
throw new Error(`Module ${module.resource} has no static exports ${module.providedExports}`);
let content;
if(dep.id === null) {
content = `__WEBPACK_MODULE_REFERENCE__${info.index}_ns__`;
} else if(dep.namespaceObjectAsContext) {
content = `__WEBPACK_MODULE_REFERENCE__${info.index}_ns__[${JSON.stringify(dep.id)}]`;
} else {
const exportIdx = (module.providedExports).indexOf(dep.id);
content = exportIdx === -1 ? "undefined" : `__WEBPACK_MODULE_REFERENCE__${info.index}_${exportIdx}__`;
}
if(dep.shorthand) {
content = dep.name + ": " + content;
}
source.replace(dep.range[0], dep.range[1] - 1, content);
}
}
class HarmonyImportDependencyConcatenatedTemplate {
constructor(originalTemplate, modulesMap) {
this.originalTemplate = originalTemplate;
this.modulesMap = modulesMap;
}
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
const module = dep.module;
const info = this.modulesMap.get(module);
if(!info) {
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
return;
}
source.replace(dep.range[0], dep.range[1] - 1, "");
}
}
class HarmonyExportSpecifierDependencyConcatenatedTemplate {
constructor(originalTemplate, rootModule) {
this.originalTemplate = originalTemplate;
this.rootModule = rootModule;
}
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
if(dep.originModule === this.rootModule) {
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
}
}
}
class HarmonyExportExpressionDependencyConcatenatedTemplate {
constructor(originalTemplate, rootModule) {
this.originalTemplate = originalTemplate;
this.rootModule = rootModule;
}
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
let content = "/* harmony default export */ var __WEBPACK_MODULE_DEFAULT_EXPORT__ = ";
if(dep.originModule === this.rootModule) {
const used = dep.originModule.isUsed("default");
const exportsName = dep.originModule.exportsArgument || "exports";
if(used) content += `${exportsName}[${JSON.stringify(used)}] = `;
}
if(dep.range) {
source.replace(dep.rangeStatement[0], dep.range[0] - 1, content + "(");
source.replace(dep.range[1], dep.rangeStatement[1] - 1, ");");
return;
}
source.replace(dep.rangeStatement[0], dep.rangeStatement[1] - 1, content);
}
}
class HarmonyExportImportedSpecifierDependencyConcatenatedTemplate {
constructor(originalTemplate, rootModule, modulesMap) {
this.originalTemplate = originalTemplate;
this.rootModule = rootModule;
this.modulesMap = modulesMap;
}
getExports(dep) {
const active = HarmonyModulesHelpers.isActive(dep.originModule, dep);
if(!active) return [];
const importModule = dep.importDependency.module;
if(dep.id) {
// export { named } from "module"
return [{
name: dep.name,
id: dep.id,
module: importModule
}];
}
if(dep.name) {
// export * as abc from "module"
return [{
name: dep.name,
id: true,
module: importModule
}];
}
// export * from "module"
const activeExports = new Set(HarmonyModulesHelpers.getActiveExports(dep.originModule, dep));
return importModule.providedExports.filter(exp => exp !== "default" && !activeExports.has(exp)).map(exp => {
return {
name: exp,
id: exp,
module: importModule
};
});
}
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
if(dep.originModule === this.rootModule) {
if(this.modulesMap.get(dep.importDependency.module)) {
const exportDefs = this.getExports(dep);
exportDefs.forEach(def => {
const info = this.modulesMap.get(def.module);
const used = dep.originModule.isUsed(def.name);
if(!used) {
source.insert(-1, `/* unused concated harmony import ${dep.name} */\n`);
}
let finalName;
if(def.id === true) {
finalName = `__WEBPACK_MODULE_REFERENCE__${info.index}_ns__`;
} else {
const exportIdx = def.module.providedExports.indexOf(def.id);
finalName = exportIdx < 0 ? "undefined" : `__WEBPACK_MODULE_REFERENCE__${info.index}_${exportIdx}__`;
}
const exportsName = this.rootModule.exportsArgument || "exports";
const content = `/* concated harmony reexport */__webpack_require__.d(${exportsName}, ${JSON.stringify(used)}, function() { return ${finalName}; });\n`;
source.insert(-1, content);
});
} else {
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
}
}
}
}
class HarmonyCompatibilityDependencyConcatenatedTemplate {
constructor(originalTemplate, rootModule, modulesMap) {
this.originalTemplate = originalTemplate;
this.rootModule = rootModule;
this.modulesMap = modulesMap;
}
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
if(dep.originModule === this.rootModule) {
this.modulesMap.get(this.rootModule).needCompatibilityFlag = true;
}
}
}
module.exports = ConcatenatedModule;