mirror of
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456 lines
24 KiB
TypeScript
456 lines
24 KiB
TypeScript
// Used by importFixes, getEditsForFileRename, and declaration emit to synthesize import module specifiers.
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/* @internal */
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namespace ts.moduleSpecifiers {
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const enum RelativePreference { Relative, NonRelative, Auto }
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// See UserPreferences#importPathEnding
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const enum Ending { Minimal, Index, JsExtension }
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// Processed preferences
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interface Preferences {
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readonly relativePreference: RelativePreference;
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readonly ending: Ending;
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}
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function getPreferences({ importModuleSpecifierPreference, importModuleSpecifierEnding }: UserPreferences, compilerOptions: CompilerOptions, importingSourceFile: SourceFile): Preferences {
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return {
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relativePreference: importModuleSpecifierPreference === "relative" ? RelativePreference.Relative : importModuleSpecifierPreference === "non-relative" ? RelativePreference.NonRelative : RelativePreference.Auto,
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ending: getEnding(),
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};
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function getEnding(): Ending {
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switch (importModuleSpecifierEnding) {
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case "minimal": return Ending.Minimal;
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case "index": return Ending.Index;
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case "js": return Ending.JsExtension;
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default: return usesJsExtensionOnImports(importingSourceFile) ? Ending.JsExtension
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: getEmitModuleResolutionKind(compilerOptions) !== ModuleResolutionKind.NodeJs ? Ending.Index : Ending.Minimal;
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}
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}
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}
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function getPreferencesForUpdate(compilerOptions: CompilerOptions, oldImportSpecifier: string): Preferences {
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return {
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relativePreference: isExternalModuleNameRelative(oldImportSpecifier) ? RelativePreference.Relative : RelativePreference.NonRelative,
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ending: hasJSOrJsonFileExtension(oldImportSpecifier) ? Ending.JsExtension
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: getEmitModuleResolutionKind(compilerOptions) !== ModuleResolutionKind.NodeJs || endsWith(oldImportSpecifier, "index") ? Ending.Index : Ending.Minimal,
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};
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}
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export function updateModuleSpecifier(
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compilerOptions: CompilerOptions,
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importingSourceFileName: Path,
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toFileName: string,
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host: ModuleSpecifierResolutionHost,
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files: ReadonlyArray<SourceFile>,
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redirectTargetsMap: RedirectTargetsMap,
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oldImportSpecifier: string,
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): string | undefined {
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const res = getModuleSpecifierWorker(compilerOptions, importingSourceFileName, toFileName, host, files, redirectTargetsMap, getPreferencesForUpdate(compilerOptions, oldImportSpecifier));
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if (res === oldImportSpecifier) return undefined;
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return res;
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}
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// Note: importingSourceFile is just for usesJsExtensionOnImports
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export function getModuleSpecifier(
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compilerOptions: CompilerOptions,
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importingSourceFile: SourceFile,
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importingSourceFileName: Path,
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toFileName: string,
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host: ModuleSpecifierResolutionHost,
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files: ReadonlyArray<SourceFile>,
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preferences: UserPreferences = {},
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redirectTargetsMap: RedirectTargetsMap,
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): string {
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return getModuleSpecifierWorker(compilerOptions, importingSourceFileName, toFileName, host, files, redirectTargetsMap, getPreferences(preferences, compilerOptions, importingSourceFile));
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}
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function getModuleSpecifierWorker(
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compilerOptions: CompilerOptions,
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importingSourceFileName: Path,
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toFileName: string,
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host: ModuleSpecifierResolutionHost,
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files: ReadonlyArray<SourceFile>,
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redirectTargetsMap: RedirectTargetsMap,
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preferences: Preferences
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): string {
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const info = getInfo(importingSourceFileName, host);
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const modulePaths = getAllModulePaths(files, importingSourceFileName, toFileName, info.getCanonicalFileName, host, redirectTargetsMap);
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return firstDefined(modulePaths, moduleFileName => tryGetModuleNameAsNodeModule(moduleFileName, info, host, compilerOptions)) ||
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getLocalModuleSpecifier(toFileName, info, compilerOptions, preferences);
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}
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// Returns an import for each symlink and for the realpath.
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export function getModuleSpecifiers(
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moduleSymbol: Symbol,
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compilerOptions: CompilerOptions,
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importingSourceFile: SourceFile,
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host: ModuleSpecifierResolutionHost,
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files: ReadonlyArray<SourceFile>,
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userPreferences: UserPreferences,
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redirectTargetsMap: RedirectTargetsMap,
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): ReadonlyArray<string> {
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const ambient = tryGetModuleNameFromAmbientModule(moduleSymbol);
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if (ambient) return [ambient];
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const info = getInfo(importingSourceFile.path, host);
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const moduleSourceFile = getSourceFileOfNode(moduleSymbol.valueDeclaration || getNonAugmentationDeclaration(moduleSymbol));
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const modulePaths = getAllModulePaths(files, importingSourceFile.path, moduleSourceFile.fileName, info.getCanonicalFileName, host, redirectTargetsMap);
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const preferences = getPreferences(userPreferences, compilerOptions, importingSourceFile);
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const global = mapDefined(modulePaths, moduleFileName => tryGetModuleNameAsNodeModule(moduleFileName, info, host, compilerOptions));
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return global.length ? global : modulePaths.map(moduleFileName => getLocalModuleSpecifier(moduleFileName, info, compilerOptions, preferences));
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}
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interface Info {
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readonly getCanonicalFileName: GetCanonicalFileName;
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readonly sourceDirectory: Path;
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}
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// importingSourceFileName is separate because getEditsForFileRename may need to specify an updated path
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function getInfo(importingSourceFileName: Path, host: ModuleSpecifierResolutionHost): Info {
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const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames ? host.useCaseSensitiveFileNames() : true);
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const sourceDirectory = getDirectoryPath(importingSourceFileName);
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return { getCanonicalFileName, sourceDirectory };
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}
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function getLocalModuleSpecifier(moduleFileName: string, { getCanonicalFileName, sourceDirectory }: Info, compilerOptions: CompilerOptions, { ending, relativePreference }: Preferences): string {
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const { baseUrl, paths, rootDirs } = compilerOptions;
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const relativePath = rootDirs && tryGetModuleNameFromRootDirs(rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName) ||
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removeExtensionAndIndexPostFix(ensurePathIsNonModuleName(getRelativePathFromDirectory(sourceDirectory, moduleFileName, getCanonicalFileName)), ending, compilerOptions);
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if (!baseUrl || relativePreference === RelativePreference.Relative) {
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return relativePath;
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}
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const relativeToBaseUrl = getRelativePathIfInDirectory(moduleFileName, baseUrl, getCanonicalFileName);
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if (!relativeToBaseUrl) {
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return relativePath;
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}
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const importRelativeToBaseUrl = removeExtensionAndIndexPostFix(relativeToBaseUrl, ending, compilerOptions);
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const fromPaths = paths && tryGetModuleNameFromPaths(removeFileExtension(relativeToBaseUrl), importRelativeToBaseUrl, paths);
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const nonRelative = fromPaths === undefined ? importRelativeToBaseUrl : fromPaths;
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if (relativePreference === RelativePreference.NonRelative) {
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return nonRelative;
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}
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if (relativePreference !== RelativePreference.Auto) Debug.assertNever(relativePreference);
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// Prefer a relative import over a baseUrl import if it has fewer components.
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return isPathRelativeToParent(nonRelative) || countPathComponents(relativePath) < countPathComponents(nonRelative) ? relativePath : nonRelative;
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}
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export function countPathComponents(path: string): number {
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let count = 0;
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for (let i = startsWith(path, "./") ? 2 : 0; i < path.length; i++) {
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if (path.charCodeAt(i) === CharacterCodes.slash) count++;
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}
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return count;
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}
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function usesJsExtensionOnImports({ imports }: SourceFile): boolean {
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return firstDefined(imports, ({ text }) => pathIsRelative(text) ? hasJSOrJsonFileExtension(text) : undefined) || false;
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}
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function stringsEqual(a: string, b: string, getCanonicalFileName: GetCanonicalFileName): boolean {
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return getCanonicalFileName(a) === getCanonicalFileName(b);
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}
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// KLUDGE: Don't assume one 'node_modules' links to another. More likely a single directory inside the node_modules is the symlink.
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// ALso, don't assume that an `@foo` directory is linked. More likely the contents of that are linked.
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function isNodeModulesOrScopedPackageDirectory(s: string, getCanonicalFileName: GetCanonicalFileName): boolean {
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return getCanonicalFileName(s) === "node_modules" || startsWith(s, "@");
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}
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function guessDirectorySymlink(a: string, b: string, cwd: string, getCanonicalFileName: GetCanonicalFileName): [string, string] {
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const aParts = getPathComponents(toPath(a, cwd, getCanonicalFileName));
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const bParts = getPathComponents(toPath(b, cwd, getCanonicalFileName));
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while (!isNodeModulesOrScopedPackageDirectory(aParts[aParts.length - 2], getCanonicalFileName) &&
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!isNodeModulesOrScopedPackageDirectory(bParts[bParts.length - 2], getCanonicalFileName) &&
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stringsEqual(aParts[aParts.length - 1], bParts[bParts.length - 1], getCanonicalFileName)) {
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aParts.pop();
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bParts.pop();
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}
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return [getPathFromPathComponents(aParts), getPathFromPathComponents(bParts)];
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}
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function discoverProbableSymlinks(files: ReadonlyArray<SourceFile>, getCanonicalFileName: GetCanonicalFileName, cwd: string): ReadonlyMap<string> {
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const result = createMap<string>();
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const symlinks = flatten<readonly [string, string]>(mapDefined(files, sf =>
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sf.resolvedModules && compact(arrayFrom(mapIterator(sf.resolvedModules.values(), res =>
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res && res.originalPath && res.resolvedFileName !== res.originalPath ? [res.resolvedFileName, res.originalPath] as const : undefined)))));
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for (const [resolvedPath, originalPath] of symlinks) {
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const [commonResolved, commonOriginal] = guessDirectorySymlink(resolvedPath, originalPath, cwd, getCanonicalFileName);
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result.set(commonOriginal, commonResolved);
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}
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return result;
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}
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/**
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* Looks for existing imports that use symlinks to this module.
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* Symlinks will be returned first so they are preferred over the real path.
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*/
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function getAllModulePaths(files: ReadonlyArray<SourceFile>, importingFileName: string, importedFileName: string, getCanonicalFileName: GetCanonicalFileName, host: ModuleSpecifierResolutionHost, redirectTargetsMap: RedirectTargetsMap): ReadonlyArray<string> {
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const redirects = redirectTargetsMap.get(importedFileName);
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const importedFileNames = redirects ? [...redirects, importedFileName] : [importedFileName];
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const cwd = host.getCurrentDirectory ? host.getCurrentDirectory() : "";
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const targets = importedFileNames.map(f => getNormalizedAbsolutePath(f, cwd));
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const links = discoverProbableSymlinks(files, getCanonicalFileName, cwd);
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const result: string[] = [];
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const compareStrings = (!host.useCaseSensitiveFileNames || host.useCaseSensitiveFileNames()) ? compareStringsCaseSensitive : compareStringsCaseInsensitive;
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links.forEach((resolved, path) => {
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if (startsWithDirectory(importingFileName, resolved, getCanonicalFileName)) {
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return; // Don't want to a package to globally import from itself
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}
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const target = find(targets, t => compareStrings(t.slice(0, resolved.length + 1), resolved + "/") === Comparison.EqualTo);
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if (target === undefined) return;
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const relative = getRelativePathFromDirectory(resolved, target, getCanonicalFileName);
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const option = resolvePath(path, relative);
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if (!host.fileExists || host.fileExists(option)) {
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result.push(option);
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}
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});
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result.push(...targets);
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return result;
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}
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function tryGetModuleNameFromAmbientModule(moduleSymbol: Symbol): string | undefined {
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const decl = find(moduleSymbol.declarations,
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d => isNonGlobalAmbientModule(d) && (!isExternalModuleAugmentation(d) || !isExternalModuleNameRelative(getTextOfIdentifierOrLiteral(d.name)))
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) as (ModuleDeclaration & { name: StringLiteral }) | undefined;
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if (decl) {
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return decl.name.text;
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}
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}
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function tryGetModuleNameFromPaths(relativeToBaseUrlWithIndex: string, relativeToBaseUrl: string, paths: MapLike<ReadonlyArray<string>>): string | undefined {
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for (const key in paths) {
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for (const patternText of paths[key]) {
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const pattern = removeFileExtension(normalizePath(patternText));
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const indexOfStar = pattern.indexOf("*");
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if (indexOfStar !== -1) {
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const prefix = pattern.substr(0, indexOfStar);
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const suffix = pattern.substr(indexOfStar + 1);
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if (relativeToBaseUrl.length >= prefix.length + suffix.length &&
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startsWith(relativeToBaseUrl, prefix) &&
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endsWith(relativeToBaseUrl, suffix) ||
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!suffix && relativeToBaseUrl === removeTrailingDirectorySeparator(prefix)) {
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const matchedStar = relativeToBaseUrl.substr(prefix.length, relativeToBaseUrl.length - suffix.length);
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return key.replace("*", matchedStar);
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}
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}
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else if (pattern === relativeToBaseUrl || pattern === relativeToBaseUrlWithIndex) {
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return key;
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}
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}
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}
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}
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function tryGetModuleNameFromRootDirs(rootDirs: ReadonlyArray<string>, moduleFileName: string, sourceDirectory: string, getCanonicalFileName: (file: string) => string): string | undefined {
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const normalizedTargetPath = getPathRelativeToRootDirs(moduleFileName, rootDirs, getCanonicalFileName);
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if (normalizedTargetPath === undefined) {
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return undefined;
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}
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const normalizedSourcePath = getPathRelativeToRootDirs(sourceDirectory, rootDirs, getCanonicalFileName);
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const relativePath = normalizedSourcePath !== undefined ? ensurePathIsNonModuleName(getRelativePathFromDirectory(normalizedSourcePath, normalizedTargetPath, getCanonicalFileName)) : normalizedTargetPath;
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return removeFileExtension(relativePath);
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}
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function tryGetModuleNameAsNodeModule(moduleFileName: string, { getCanonicalFileName, sourceDirectory }: Info, host: ModuleSpecifierResolutionHost, options: CompilerOptions): string | undefined {
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if (!host.fileExists || !host.readFile) {
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return undefined;
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}
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const parts: NodeModulePathParts = getNodeModulePathParts(moduleFileName)!;
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if (!parts) {
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return undefined;
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}
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const packageRootPath = moduleFileName.substring(0, parts.packageRootIndex);
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const packageJsonPath = combinePaths(packageRootPath, "package.json");
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const packageJsonContent = host.fileExists(packageJsonPath)
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? JSON.parse(host.readFile(packageJsonPath)!)
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: undefined;
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const versionPaths = packageJsonContent && packageJsonContent.typesVersions
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? getPackageJsonTypesVersionsPaths(packageJsonContent.typesVersions)
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: undefined;
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if (versionPaths) {
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const subModuleName = moduleFileName.slice(parts.packageRootIndex + 1);
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const fromPaths = tryGetModuleNameFromPaths(
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removeFileExtension(subModuleName),
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removeExtensionAndIndexPostFix(subModuleName, Ending.Minimal, options),
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versionPaths.paths
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);
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if (fromPaths !== undefined) {
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moduleFileName = combinePaths(moduleFileName.slice(0, parts.packageRootIndex), fromPaths);
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}
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}
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// Simplify the full file path to something that can be resolved by Node.
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// If the module could be imported by a directory name, use that directory's name
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const moduleSpecifier = getDirectoryOrExtensionlessFileName(moduleFileName);
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// Get a path that's relative to node_modules or the importing file's path
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// if node_modules folder is in this folder or any of its parent folders, no need to keep it.
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if (!startsWith(sourceDirectory, getCanonicalFileName(moduleSpecifier.substring(0, parts.topLevelNodeModulesIndex)))) return undefined;
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// If the module was found in @types, get the actual Node package name
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const nodeModulesDirectoryName = moduleSpecifier.substring(parts.topLevelPackageNameIndex + 1);
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const packageName = getPackageNameFromTypesPackageName(nodeModulesDirectoryName);
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// For classic resolution, only allow importing from node_modules/@types, not other node_modules
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return getEmitModuleResolutionKind(options) !== ModuleResolutionKind.NodeJs && packageName === nodeModulesDirectoryName ? undefined : packageName;
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function getDirectoryOrExtensionlessFileName(path: string): string {
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// If the file is the main module, it can be imported by the package name
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if (packageJsonContent) {
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const mainFileRelative = packageJsonContent.typings || packageJsonContent.types || packageJsonContent.main;
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if (mainFileRelative) {
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const mainExportFile = toPath(mainFileRelative, packageRootPath, getCanonicalFileName);
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if (removeFileExtension(mainExportFile) === removeFileExtension(getCanonicalFileName(path))) {
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return packageRootPath;
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}
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}
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}
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// We still have a file name - remove the extension
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const fullModulePathWithoutExtension = removeFileExtension(path);
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// If the file is /index, it can be imported by its directory name
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// IFF there is not _also_ a file by the same name
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if (getCanonicalFileName(fullModulePathWithoutExtension.substring(parts.fileNameIndex)) === "/index" && !tryGetAnyFileFromPath(host, fullModulePathWithoutExtension.substring(0, parts.fileNameIndex))) {
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return fullModulePathWithoutExtension.substring(0, parts.fileNameIndex);
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}
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return fullModulePathWithoutExtension;
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}
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}
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function tryGetAnyFileFromPath(host: ModuleSpecifierResolutionHost, path: string) {
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if (!host.fileExists) return;
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// We check all js, `node` and `json` extensions in addition to TS, since node module resolution would also choose those over the directory
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const extensions = getSupportedExtensions({ allowJs: true }, [{ extension: "node", isMixedContent: false }, { extension: "json", isMixedContent: false, scriptKind: ScriptKind.JSON }]);
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for (const e of extensions) {
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const fullPath = path + e;
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if (host.fileExists(fullPath)) {
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return fullPath;
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}
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}
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}
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interface NodeModulePathParts {
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readonly topLevelNodeModulesIndex: number;
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readonly topLevelPackageNameIndex: number;
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readonly packageRootIndex: number;
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readonly fileNameIndex: number;
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}
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function getNodeModulePathParts(fullPath: string): NodeModulePathParts | undefined {
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// If fullPath can't be valid module file within node_modules, returns undefined.
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// Example of expected pattern: /base/path/node_modules/[@scope/otherpackage/@otherscope/node_modules/]package/[subdirectory/]file.js
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// Returns indices: ^ ^ ^ ^
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let topLevelNodeModulesIndex = 0;
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let topLevelPackageNameIndex = 0;
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let packageRootIndex = 0;
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let fileNameIndex = 0;
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const enum States {
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BeforeNodeModules,
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NodeModules,
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Scope,
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PackageContent
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}
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let partStart = 0;
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let partEnd = 0;
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let state = States.BeforeNodeModules;
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while (partEnd >= 0) {
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partStart = partEnd;
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partEnd = fullPath.indexOf("/", partStart + 1);
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switch (state) {
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case States.BeforeNodeModules:
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if (fullPath.indexOf(nodeModulesPathPart, partStart) === partStart) {
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topLevelNodeModulesIndex = partStart;
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topLevelPackageNameIndex = partEnd;
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state = States.NodeModules;
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}
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break;
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case States.NodeModules:
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case States.Scope:
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if (state === States.NodeModules && fullPath.charAt(partStart + 1) === "@") {
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state = States.Scope;
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}
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else {
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packageRootIndex = partEnd;
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state = States.PackageContent;
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}
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break;
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case States.PackageContent:
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if (fullPath.indexOf(nodeModulesPathPart, partStart) === partStart) {
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state = States.NodeModules;
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}
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else {
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state = States.PackageContent;
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}
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break;
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}
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}
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fileNameIndex = partStart;
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return state > States.NodeModules ? { topLevelNodeModulesIndex, topLevelPackageNameIndex, packageRootIndex, fileNameIndex } : undefined;
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}
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function getPathRelativeToRootDirs(path: string, rootDirs: ReadonlyArray<string>, getCanonicalFileName: GetCanonicalFileName): string | undefined {
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return firstDefined(rootDirs, rootDir => {
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const relativePath = getRelativePathIfInDirectory(path, rootDir, getCanonicalFileName)!; // TODO: GH#18217
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return isPathRelativeToParent(relativePath) ? undefined : relativePath;
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});
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}
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function removeExtensionAndIndexPostFix(fileName: string, ending: Ending, options: CompilerOptions): string {
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if (fileExtensionIs(fileName, Extension.Json)) return fileName;
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const noExtension = removeFileExtension(fileName);
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switch (ending) {
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case Ending.Minimal:
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return removeSuffix(noExtension, "/index");
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case Ending.Index:
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return noExtension;
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case Ending.JsExtension:
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return noExtension + getJSExtensionForFile(fileName, options);
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default:
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return Debug.assertNever(ending);
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}
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}
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function getJSExtensionForFile(fileName: string, options: CompilerOptions): Extension {
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const ext = extensionFromPath(fileName);
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switch (ext) {
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case Extension.Ts:
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case Extension.Dts:
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return Extension.Js;
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case Extension.Tsx:
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return options.jsx === JsxEmit.Preserve ? Extension.Jsx : Extension.Js;
|
|
case Extension.Js:
|
|
case Extension.Jsx:
|
|
case Extension.Json:
|
|
return ext;
|
|
case Extension.TsBuildInfo:
|
|
return Debug.fail(`Extension ${Extension.TsBuildInfo} is unsupported:: FileName:: ${fileName}`);
|
|
default:
|
|
return Debug.assertNever(ext);
|
|
}
|
|
}
|
|
|
|
function getRelativePathIfInDirectory(path: string, directoryPath: string, getCanonicalFileName: GetCanonicalFileName): string | undefined {
|
|
const relativePath = getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
|
|
return isRootedDiskPath(relativePath) ? undefined : relativePath;
|
|
}
|
|
|
|
function isPathRelativeToParent(path: string): boolean {
|
|
return startsWith(path, "..");
|
|
}
|
|
}
|