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Copy pathutilities.ts
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180 lines (162 loc) · 9.04 KB
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/* @internal */
namespace ts {
export function getOriginalNodeId(node: Node) {
node = getOriginalNode(node);
return node ? getNodeId(node) : 0;
}
export interface ExternalModuleInfo {
externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[]; // imports of other external modules
externalHelpersImportDeclaration: ImportDeclaration | undefined; // import of external helpers
exportSpecifiers: Map<ExportSpecifier[]>; // export specifiers by name
exportedBindings: Identifier[][]; // exported names of local declarations
exportedNames: Identifier[]; // all exported names local to module
exportEquals: ExportAssignment | undefined; // an export= declaration if one was present
hasExportStarsToExportValues: boolean; // whether this module contains export*
}
export function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver, compilerOptions: CompilerOptions): ExternalModuleInfo {
const externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[] = [];
const exportSpecifiers = createMultiMap<ExportSpecifier>();
const exportedBindings: Identifier[][] = [];
const uniqueExports = createMap<boolean>();
let exportedNames: Identifier[];
let hasExportDefault = false;
let exportEquals: ExportAssignment = undefined;
let hasExportStarsToExportValues = false;
for (const node of sourceFile.statements) {
switch (node.kind) {
case SyntaxKind.ImportDeclaration:
// import "mod"
// import x from "mod"
// import * as x from "mod"
// import { x, y } from "mod"
externalImports.push(<ImportDeclaration>node);
break;
case SyntaxKind.ImportEqualsDeclaration:
if ((<ImportEqualsDeclaration>node).moduleReference.kind === SyntaxKind.ExternalModuleReference) {
// import x = require("mod")
externalImports.push(<ImportEqualsDeclaration>node);
}
break;
case SyntaxKind.ExportDeclaration:
if ((<ExportDeclaration>node).moduleSpecifier) {
if (!(<ExportDeclaration>node).exportClause) {
// export * from "mod"
externalImports.push(<ExportDeclaration>node);
hasExportStarsToExportValues = true;
}
else {
// export { x, y } from "mod"
externalImports.push(<ExportDeclaration>node);
}
}
else {
// export { x, y }
for (const specifier of (<ExportDeclaration>node).exportClause.elements) {
if (!uniqueExports.get(unescapeLeadingUnderscores(specifier.name.escapedText))) {
const name = specifier.propertyName || specifier.name;
exportSpecifiers.add(unescapeLeadingUnderscores(name.escapedText), specifier);
const decl = resolver.getReferencedImportDeclaration(name)
|| resolver.getReferencedValueDeclaration(name);
if (decl) {
multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(decl), specifier.name);
}
uniqueExports.set(unescapeLeadingUnderscores(specifier.name.escapedText), true);
exportedNames = append(exportedNames, specifier.name);
}
}
}
break;
case SyntaxKind.ExportAssignment:
if ((<ExportAssignment>node).isExportEquals && !exportEquals) {
// export = x
exportEquals = <ExportAssignment>node;
}
break;
case SyntaxKind.VariableStatement:
if (hasModifier(node, ModifierFlags.Export)) {
for (const decl of (<VariableStatement>node).declarationList.declarations) {
exportedNames = collectExportedVariableInfo(decl, uniqueExports, exportedNames);
}
}
break;
case SyntaxKind.FunctionDeclaration:
if (hasModifier(node, ModifierFlags.Export)) {
if (hasModifier(node, ModifierFlags.Default)) {
// export default function() { }
if (!hasExportDefault) {
multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), getDeclarationName(<FunctionDeclaration>node));
hasExportDefault = true;
}
}
else {
// export function x() { }
const name = (<FunctionDeclaration>node).name;
if (!uniqueExports.get(unescapeLeadingUnderscores(name.escapedText))) {
multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
uniqueExports.set(unescapeLeadingUnderscores(name.escapedText), true);
exportedNames = append(exportedNames, name);
}
}
}
break;
case SyntaxKind.ClassDeclaration:
if (hasModifier(node, ModifierFlags.Export)) {
if (hasModifier(node, ModifierFlags.Default)) {
// export default class { }
if (!hasExportDefault) {
multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), getDeclarationName(<ClassDeclaration>node));
hasExportDefault = true;
}
}
else {
// export class x { }
const name = (<ClassDeclaration>node).name;
if (name && !uniqueExports.get(unescapeLeadingUnderscores(name.escapedText))) {
multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
uniqueExports.set(unescapeLeadingUnderscores(name.escapedText), true);
exportedNames = append(exportedNames, name);
}
}
}
break;
}
}
const externalHelpersModuleName = getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues);
const externalHelpersImportDeclaration = externalHelpersModuleName && createImportDeclaration(
/*decorators*/ undefined,
/*modifiers*/ undefined,
createImportClause(/*name*/ undefined, createNamespaceImport(externalHelpersModuleName)),
createLiteral(externalHelpersModuleNameText));
if (externalHelpersImportDeclaration) {
externalImports.unshift(externalHelpersImportDeclaration);
}
return { externalImports, exportSpecifiers, exportEquals, hasExportStarsToExportValues, exportedBindings, exportedNames, externalHelpersImportDeclaration };
}
function collectExportedVariableInfo(decl: VariableDeclaration | BindingElement, uniqueExports: Map<boolean>, exportedNames: Identifier[]) {
if (isBindingPattern(decl.name)) {
for (const element of decl.name.elements) {
if (!isOmittedExpression(element)) {
exportedNames = collectExportedVariableInfo(element, uniqueExports, exportedNames);
}
}
}
else if (!isGeneratedIdentifier(decl.name)) {
if (!uniqueExports.get(unescapeLeadingUnderscores(decl.name.escapedText))) {
uniqueExports.set(unescapeLeadingUnderscores(decl.name.escapedText), true);
exportedNames = append(exportedNames, decl.name);
}
}
return exportedNames;
}
/** Use a sparse array as a multi-map. */
function multiMapSparseArrayAdd<V>(map: V[][], key: number, value: V): V[] {
let values = map[key];
if (values) {
values.push(value);
}
else {
map[key] = values = [value];
}
return values;
}
}