mirror of
https://github.com/microsoft/TypeScript.git
synced 2026-05-17 11:24:29 -05:00
merge with origin/master
This commit is contained in:
Vladimir Matveev
@@ -2,6 +2,36 @@
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||||
/// <reference path="diagnosticInformationMap.generated.ts" />
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namespace ts {
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||||
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/* @internal */
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export function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
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||||
export function trace(host: ModuleResolutionHost, message: DiagnosticMessage): void {
|
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host.trace(formatMessage.apply(undefined, arguments));
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||||
}
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||||
|
||||
/* @internal */
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||||
export function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean {
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||||
return compilerOptions.traceResolution && host.trace !== undefined;
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}
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||||
|
||||
/* @internal */
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||||
export function createResolvedModule(resolvedFileName: string, isExternalLibraryImport: boolean, failedLookupLocations: string[]): ResolvedModuleWithFailedLookupLocations {
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return { resolvedModule: resolvedFileName ? { resolvedFileName, isExternalLibraryImport } : undefined, failedLookupLocations };
|
||||
}
|
||||
|
||||
function moduleHasNonRelativeName(moduleName: string): boolean {
|
||||
return !(isRootedDiskPath(moduleName) || isExternalModuleNameRelative(moduleName));
|
||||
}
|
||||
|
||||
/* @internal */
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export interface ModuleResolutionState {
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host: ModuleResolutionHost;
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compilerOptions: CompilerOptions;
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traceEnabled: boolean;
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// skip .tsx files if jsx is not enabled
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skipTsx: boolean;
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}
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||||
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||||
function tryReadTypesSection(packageJsonPath: string, baseDirectory: string, state: ModuleResolutionState): string {
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||||
const jsonContent = readJson(packageJsonPath, state.host);
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@@ -39,233 +69,323 @@ namespace ts {
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return undefined;
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}
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||||
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||||
/** Return the file if it exists. */
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||||
function tryFile(fileName: string, failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
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||||
if (!onlyRecordFailures && state.host.fileExists(fileName)) {
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||||
if (state.traceEnabled) {
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trace(state.host, Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
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||||
}
|
||||
return fileName;
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function readJson(path: string, host: ModuleResolutionHost): { typings?: string, types?: string, main?: string } {
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||||
try {
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||||
const jsonText = host.readFile(path);
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||||
return jsonText ? JSON.parse(jsonText) : {};
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||||
}
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||||
else {
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||||
if (state.traceEnabled) {
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trace(state.host, Diagnostics.File_0_does_not_exist, fileName);
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||||
}
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failedLookupLocation.push(fileName);
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return undefined;
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catch (e) {
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// gracefully handle if readFile fails or returns not JSON
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return {};
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||||
}
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||||
}
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||||
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/** Try to return an existing file that adds one of the `extensions` to `candidate`. */
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function tryAddingExtensions(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
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if (!onlyRecordFailures) {
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// check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
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||||
const directory = getDirectoryPath(candidate);
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if (directory) {
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onlyRecordFailures = !directoryProbablyExists(directory, state.host);
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}
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const typeReferenceExtensions = [".d.ts"];
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export function getEffectiveTypeRoots(options: CompilerOptions, host: { directoryExists?: (directoryName: string) => boolean, getCurrentDirectory?: () => string }): string[] | undefined {
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if (options.typeRoots) {
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return options.typeRoots;
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||||
}
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||||
return forEach(extensions, ext =>
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!(state.skipTsx && isJsxOrTsxExtension(ext)) && tryFile(candidate + ext, failedLookupLocation, onlyRecordFailures, state));
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|
||||
let currentDirectory: string;
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if (options.configFilePath) {
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currentDirectory = getDirectoryPath(options.configFilePath);
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}
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||||
else if (host.getCurrentDirectory) {
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||||
currentDirectory = host.getCurrentDirectory();
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||||
}
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||||
|
||||
return currentDirectory && getDefaultTypeRoots(currentDirectory, host);
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||||
}
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||||
|
||||
/**
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||||
* @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
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||||
* in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
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||||
* Returns the path to every node_modules/@types directory from some ancestor directory.
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||||
* Returns undefined if there are none.
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||||
*/
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||||
function loadModuleFromFile(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
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||||
// First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
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||||
const resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
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||||
if (resolvedByAddingExtension) {
|
||||
return resolvedByAddingExtension;
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||||
function getDefaultTypeRoots(currentDirectory: string, host: { directoryExists?: (directoryName: string) => boolean }): string[] | undefined {
|
||||
if (!host.directoryExists) {
|
||||
return [combinePaths(currentDirectory, nodeModulesAtTypes)];
|
||||
// And if it doesn't exist, tough.
|
||||
}
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||||
|
||||
// If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
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||||
// e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
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||||
if (hasJavaScriptFileExtension(candidate)) {
|
||||
const extensionless = removeFileExtension(candidate);
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||||
if (state.traceEnabled) {
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||||
const extension = candidate.substring(extensionless.length);
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trace(state.host, Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
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||||
let typeRoots: string[];
|
||||
|
||||
while (true) {
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||||
const atTypes = combinePaths(currentDirectory, nodeModulesAtTypes);
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||||
if (host.directoryExists(atTypes)) {
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||||
(typeRoots || (typeRoots = [])).push(atTypes);
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||||
}
|
||||
return tryAddingExtensions(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
|
||||
|
||||
const parent = getDirectoryPath(currentDirectory);
|
||||
if (parent === currentDirectory) {
|
||||
break;
|
||||
}
|
||||
currentDirectory = parent;
|
||||
}
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||||
|
||||
return typeRoots;
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||||
}
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||||
const nodeModulesAtTypes = combinePaths("node_modules", "@types");
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||||
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/* @internal */
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export function loadNodeModuleFromDirectory(extensions: string[], candidate: string, failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
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const packageJsonPath = pathToPackageJson(candidate);
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const directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
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if (directoryExists && state.host.fileExists(packageJsonPath)) {
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||||
if (state.traceEnabled) {
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trace(state.host, Diagnostics.Found_package_json_at_0, packageJsonPath);
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||||
}
|
||||
const typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
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if (typesFile) {
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||||
const onlyRecordFailures = !directoryProbablyExists(getDirectoryPath(typesFile), state.host);
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||||
// A package.json "typings" may specify an exact filename, or may choose to omit an extension.
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||||
const result = tryFile(typesFile, failedLookupLocation, onlyRecordFailures, state) ||
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||||
tryAddingExtensions(typesFile, extensions, failedLookupLocation, onlyRecordFailures, state);
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||||
/**
|
||||
* @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
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||||
* This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
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||||
* is assumed to be the same as root directory of the project.
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||||
*/
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||||
export function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
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||||
const traceEnabled = isTraceEnabled(options, host);
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||||
const moduleResolutionState: ModuleResolutionState = {
|
||||
compilerOptions: options,
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||||
host: host,
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||||
skipTsx: true,
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||||
traceEnabled
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||||
};
|
||||
|
||||
if (result) {
|
||||
return result;
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||||
const typeRoots = getEffectiveTypeRoots(options, host);
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||||
if (traceEnabled) {
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||||
if (containingFile === undefined) {
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||||
if (typeRoots === undefined) {
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||||
trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
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||||
}
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||||
else {
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||||
trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
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||||
}
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||||
}
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||||
else {
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||||
if (state.traceEnabled) {
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||||
trace(state.host, Diagnostics.package_json_does_not_have_types_field);
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||||
if (typeRoots === undefined) {
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||||
trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
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||||
}
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||||
else {
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trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
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||||
}
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||||
}
|
||||
}
|
||||
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||||
const failedLookupLocations: string[] = [];
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||||
|
||||
// Check primary library paths
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||||
if (typeRoots && typeRoots.length) {
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if (traceEnabled) {
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trace(host, Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
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||||
}
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||||
const primarySearchPaths = typeRoots;
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for (const typeRoot of primarySearchPaths) {
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const candidate = combinePaths(typeRoot, typeReferenceDirectiveName);
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const candidateDirectory = getDirectoryPath(candidate);
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const resolvedFile = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations,
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!directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
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||||
|
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if (resolvedFile) {
|
||||
if (traceEnabled) {
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||||
trace(host, Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, true);
|
||||
}
|
||||
return {
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||||
resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile },
|
||||
failedLookupLocations
|
||||
};
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.File_0_does_not_exist, packageJsonPath);
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
|
||||
}
|
||||
// record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
|
||||
failedLookupLocation.push(packageJsonPath);
|
||||
}
|
||||
|
||||
return loadModuleFromFile(combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
|
||||
}
|
||||
|
||||
function loadModuleFromNodeModulesFolder(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState): string {
|
||||
const nodeModulesFolder = combinePaths(directory, "node_modules");
|
||||
const nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
|
||||
const candidate = normalizePath(combinePaths(nodeModulesFolder, moduleName));
|
||||
const supportedExtensions = getSupportedExtensions(state.compilerOptions);
|
||||
|
||||
let result = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
|
||||
if (result) {
|
||||
return result;
|
||||
let resolvedFile: string;
|
||||
let initialLocationForSecondaryLookup: string;
|
||||
if (containingFile) {
|
||||
initialLocationForSecondaryLookup = getDirectoryPath(containingFile);
|
||||
}
|
||||
result = loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
|
||||
if (result) {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
/* @internal */
|
||||
export function loadModuleFromNodeModules(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState, checkOneLevel: boolean): string {
|
||||
directory = normalizeSlashes(directory);
|
||||
while (true) {
|
||||
const baseName = getBaseFileName(directory);
|
||||
if (baseName !== "node_modules") {
|
||||
// Try to load source from the package
|
||||
const packageResult = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state);
|
||||
if (packageResult && hasTypeScriptFileExtension(packageResult)) {
|
||||
// Always prefer a TypeScript (.ts, .tsx, .d.ts) file shipped with the package
|
||||
return packageResult;
|
||||
if (initialLocationForSecondaryLookup !== undefined) {
|
||||
// check secondary locations
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
|
||||
}
|
||||
resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*checkOneLevel*/ false);
|
||||
if (traceEnabled) {
|
||||
if (resolvedFile) {
|
||||
trace(host, Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
|
||||
}
|
||||
else {
|
||||
// Else prefer a types package over non-TypeScript results (e.g. JavaScript files)
|
||||
const typesResult = loadModuleFromNodeModulesFolder(combinePaths("@types", moduleName), directory, failedLookupLocations, state);
|
||||
if (typesResult || packageResult) {
|
||||
return typesResult || packageResult;
|
||||
trace(host, Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
|
||||
}
|
||||
}
|
||||
return {
|
||||
resolvedTypeReferenceDirective: resolvedFile
|
||||
? { primary: false, resolvedFileName: resolvedFile }
|
||||
: undefined,
|
||||
failedLookupLocations
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a set of options, returns the set of type directive names
|
||||
* that should be included for this program automatically.
|
||||
* This list could either come from the config file,
|
||||
* or from enumerating the types root + initial secondary types lookup location.
|
||||
* More type directives might appear in the program later as a result of loading actual source files;
|
||||
* this list is only the set of defaults that are implicitly included.
|
||||
*/
|
||||
export function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[] {
|
||||
// Use explicit type list from tsconfig.json
|
||||
if (options.types) {
|
||||
return options.types;
|
||||
}
|
||||
|
||||
// Walk the primary type lookup locations
|
||||
const result: string[] = [];
|
||||
if (host.directoryExists && host.getDirectories) {
|
||||
const typeRoots = getEffectiveTypeRoots(options, host);
|
||||
if (typeRoots) {
|
||||
for (const root of typeRoots) {
|
||||
if (host.directoryExists(root)) {
|
||||
for (const typeDirectivePath of host.getDirectories(root)) {
|
||||
const normalized = normalizePath(typeDirectivePath);
|
||||
const packageJsonPath = pathToPackageJson(combinePaths(root, normalized));
|
||||
// tslint:disable-next-line:no-null-keyword
|
||||
const isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
|
||||
if (!isNotNeededPackage) {
|
||||
// Return just the type directive names
|
||||
result.push(getBaseFileName(normalized));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const parentPath = getDirectoryPath(directory);
|
||||
if (parentPath === directory || checkOneLevel) {
|
||||
break;
|
||||
}
|
||||
|
||||
directory = parentPath;
|
||||
}
|
||||
return undefined;
|
||||
return result;
|
||||
}
|
||||
|
||||
function moduleHasNonRelativeName(moduleName: string): boolean {
|
||||
return !(isRootedDiskPath(moduleName) || isExternalModuleNameRelative(moduleName));
|
||||
}
|
||||
|
||||
export function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
|
||||
export function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
|
||||
const traceEnabled = isTraceEnabled(compilerOptions, host);
|
||||
const state = { compilerOptions, host, traceEnabled, skipTsx: !compilerOptions.jsx };
|
||||
const failedLookupLocations: string[] = [];
|
||||
const supportedExtensions = getSupportedExtensions(compilerOptions);
|
||||
let containingDirectory = getDirectoryPath(containingFile);
|
||||
|
||||
const resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
|
||||
if (resolvedFileName) {
|
||||
return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/false, failedLookupLocations);
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
|
||||
}
|
||||
|
||||
let referencedSourceFile: string;
|
||||
if (moduleHasNonRelativeName(moduleName)) {
|
||||
while (true) {
|
||||
const searchName = normalizePath(combinePaths(containingDirectory, moduleName));
|
||||
referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
|
||||
if (referencedSourceFile) {
|
||||
break;
|
||||
}
|
||||
const parentPath = getDirectoryPath(containingDirectory);
|
||||
if (parentPath === containingDirectory) {
|
||||
break;
|
||||
}
|
||||
containingDirectory = parentPath;
|
||||
let moduleResolution = compilerOptions.moduleResolution;
|
||||
if (moduleResolution === undefined) {
|
||||
moduleResolution = getEmitModuleKind(compilerOptions) === ModuleKind.CommonJS ? ModuleResolutionKind.NodeJs : ModuleResolutionKind.Classic;
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Module_resolution_kind_is_not_specified_using_0, ModuleResolutionKind[moduleResolution]);
|
||||
}
|
||||
}
|
||||
else {
|
||||
const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
|
||||
referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ModuleResolutionKind[moduleResolution]);
|
||||
}
|
||||
}
|
||||
|
||||
let result: ResolvedModuleWithFailedLookupLocations;
|
||||
switch (moduleResolution) {
|
||||
case ModuleResolutionKind.NodeJs:
|
||||
result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
|
||||
break;
|
||||
case ModuleResolutionKind.Classic:
|
||||
result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
|
||||
break;
|
||||
}
|
||||
|
||||
return referencedSourceFile
|
||||
? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations }
|
||||
: { resolvedModule: undefined, failedLookupLocations };
|
||||
}
|
||||
|
||||
export function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
|
||||
const containingDirectory = getDirectoryPath(containingFile);
|
||||
const supportedExtensions = getSupportedExtensions(compilerOptions);
|
||||
const traceEnabled = isTraceEnabled(compilerOptions, host);
|
||||
|
||||
const failedLookupLocations: string[] = [];
|
||||
const state = { compilerOptions, host, traceEnabled, skipTsx: false };
|
||||
let resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName,
|
||||
failedLookupLocations, supportedExtensions, state);
|
||||
|
||||
let isExternalLibraryImport = false;
|
||||
if (!resolvedFileName) {
|
||||
if (moduleHasNonRelativeName(moduleName)) {
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
|
||||
}
|
||||
resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state, /*checkOneLevel*/ false);
|
||||
isExternalLibraryImport = resolvedFileName !== undefined;
|
||||
if (traceEnabled) {
|
||||
if (result.resolvedModule) {
|
||||
trace(host, Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
|
||||
}
|
||||
else {
|
||||
const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
|
||||
resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
|
||||
trace(host, Diagnostics.Module_name_0_was_not_resolved, moduleName);
|
||||
}
|
||||
}
|
||||
|
||||
if (resolvedFileName && host.realpath) {
|
||||
const originalFileName = resolvedFileName;
|
||||
resolvedFileName = normalizePath(host.realpath(resolvedFileName));
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
|
||||
}
|
||||
}
|
||||
|
||||
return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
|
||||
return result;
|
||||
}
|
||||
|
||||
function nodeLoadModuleByRelativeName(candidate: string, supportedExtensions: string[], failedLookupLocations: string[],
|
||||
onlyRecordFailures: boolean, state: ModuleResolutionState): string {
|
||||
/*
|
||||
* Every module resolution kind can has its specific understanding how to load module from a specific path on disk
|
||||
* I.e. for path '/a/b/c':
|
||||
* - Node loader will first to try to check if '/a/b/c' points to a file with some supported extension and if this fails
|
||||
* it will try to load module from directory: directory '/a/b/c' should exist and it should have either 'package.json' with
|
||||
* 'typings' entry or file 'index' with some supported extension
|
||||
* - Classic loader will only try to interpret '/a/b/c' as file.
|
||||
*/
|
||||
type ResolutionKindSpecificLoader = (candidate: string, extensions: string[], failedLookupLocations: string[], onlyRecordFailures: boolean, state: ModuleResolutionState) => string;
|
||||
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
|
||||
/**
|
||||
* Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
|
||||
* mitigate differences between design time structure of the project and its runtime counterpart so the same import name
|
||||
* can be resolved successfully by TypeScript compiler and runtime module loader.
|
||||
* If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
|
||||
* fallback to standard resolution routine.
|
||||
*
|
||||
* - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
|
||||
* names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
|
||||
* be '/a/b/c/d'
|
||||
* - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
|
||||
* will be resolved based on the content of the module name.
|
||||
* Structure of 'paths' compiler options
|
||||
* 'paths': {
|
||||
* pattern-1: [...substitutions],
|
||||
* pattern-2: [...substitutions],
|
||||
* ...
|
||||
* pattern-n: [...substitutions]
|
||||
* }
|
||||
* Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
|
||||
* all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
|
||||
* If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
|
||||
* <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
|
||||
* If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
|
||||
* After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
|
||||
* from the candidate location.
|
||||
* Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
|
||||
* substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
|
||||
* will be converted to absolute using baseUrl.
|
||||
* For example:
|
||||
* baseUrl: /a/b/c
|
||||
* "paths": {
|
||||
* // match all module names
|
||||
* "*": [
|
||||
* "*", // use matched name as is,
|
||||
* // <matched name> will be looked as /a/b/c/<matched name>
|
||||
*
|
||||
* "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
|
||||
* // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
|
||||
* ],
|
||||
* // match module names that start with 'components/'
|
||||
* "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
|
||||
* // it is rooted so it will be final candidate location
|
||||
* }
|
||||
*
|
||||
* 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
|
||||
* they were in the same location. For example lets say there are two files
|
||||
* '/local/src/content/file1.ts'
|
||||
* '/shared/components/contracts/src/content/protocols/file2.ts'
|
||||
* After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
|
||||
* if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
|
||||
* 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
|
||||
* root dirs were merged together.
|
||||
* I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
|
||||
* Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
|
||||
* '/local/src/content/protocols/file2' and try to load it - failure.
|
||||
* Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
|
||||
* be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
|
||||
* entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
|
||||
*/
|
||||
function tryLoadModuleUsingOptionalResolutionSettings(moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
|
||||
failedLookupLocations: string[], supportedExtensions: string[], state: ModuleResolutionState): string {
|
||||
|
||||
if (moduleHasNonRelativeName(moduleName)) {
|
||||
return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
|
||||
}
|
||||
else {
|
||||
return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
|
||||
}
|
||||
|
||||
const resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
|
||||
|
||||
return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
|
||||
}
|
||||
|
||||
|
||||
function tryLoadModuleUsingRootDirs(moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
|
||||
failedLookupLocations: string[], supportedExtensions: string[], state: ModuleResolutionState): string {
|
||||
|
||||
@@ -392,129 +512,6 @@ namespace ts {
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
|
||||
* mitigate differences between design time structure of the project and its runtime counterpart so the same import name
|
||||
* can be resolved successfully by TypeScript compiler and runtime module loader.
|
||||
* If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
|
||||
* fallback to standard resolution routine.
|
||||
*
|
||||
* - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
|
||||
* names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
|
||||
* be '/a/b/c/d'
|
||||
* - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
|
||||
* will be resolved based on the content of the module name.
|
||||
* Structure of 'paths' compiler options
|
||||
* 'paths': {
|
||||
* pattern-1: [...substitutions],
|
||||
* pattern-2: [...substitutions],
|
||||
* ...
|
||||
* pattern-n: [...substitutions]
|
||||
* }
|
||||
* Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
|
||||
* all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
|
||||
* If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
|
||||
* <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
|
||||
* If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
|
||||
* After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
|
||||
* from the candidate location.
|
||||
* Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
|
||||
* substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
|
||||
* will be converted to absolute using baseUrl.
|
||||
* For example:
|
||||
* baseUrl: /a/b/c
|
||||
* "paths": {
|
||||
* // match all module names
|
||||
* "*": [
|
||||
* "*", // use matched name as is,
|
||||
* // <matched name> will be looked as /a/b/c/<matched name>
|
||||
*
|
||||
* "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
|
||||
* // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
|
||||
* ],
|
||||
* // match module names that start with 'components/'
|
||||
* "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
|
||||
* // it is rooted so it will be final candidate location
|
||||
* }
|
||||
*
|
||||
* 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
|
||||
* they were in the same location. For example lets say there are two files
|
||||
* '/local/src/content/file1.ts'
|
||||
* '/shared/components/contracts/src/content/protocols/file2.ts'
|
||||
* After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
|
||||
* if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
|
||||
* 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
|
||||
* root dirs were merged together.
|
||||
* I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
|
||||
* Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
|
||||
* '/local/src/content/protocols/file2' and try to load it - failure.
|
||||
* Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
|
||||
* be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
|
||||
* entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
|
||||
*/
|
||||
function tryLoadModuleUsingOptionalResolutionSettings(moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
|
||||
failedLookupLocations: string[], supportedExtensions: string[], state: ModuleResolutionState): string {
|
||||
|
||||
if (moduleHasNonRelativeName(moduleName)) {
|
||||
return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
|
||||
}
|
||||
else {
|
||||
return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
export function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
|
||||
const traceEnabled = isTraceEnabled(compilerOptions, host);
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
|
||||
}
|
||||
|
||||
let moduleResolution = compilerOptions.moduleResolution;
|
||||
if (moduleResolution === undefined) {
|
||||
moduleResolution = getEmitModuleKind(compilerOptions) === ModuleKind.CommonJS ? ModuleResolutionKind.NodeJs : ModuleResolutionKind.Classic;
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Module_resolution_kind_is_not_specified_using_0, ModuleResolutionKind[moduleResolution]);
|
||||
}
|
||||
}
|
||||
else {
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ModuleResolutionKind[moduleResolution]);
|
||||
}
|
||||
}
|
||||
|
||||
let result: ResolvedModuleWithFailedLookupLocations;
|
||||
switch (moduleResolution) {
|
||||
case ModuleResolutionKind.NodeJs:
|
||||
result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
|
||||
break;
|
||||
case ModuleResolutionKind.Classic:
|
||||
result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
|
||||
break;
|
||||
}
|
||||
|
||||
if (traceEnabled) {
|
||||
if (result.resolvedModule) {
|
||||
trace(host, Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
|
||||
}
|
||||
else {
|
||||
trace(host, Diagnostics.Module_name_0_was_not_resolved, moduleName);
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/*
|
||||
* Every module resolution kind can has its specific understanding how to load module from a specific path on disk
|
||||
* I.e. for path '/a/b/c':
|
||||
* - Node loader will first to try to check if '/a/b/c' points to a file with some supported extension and if this fails
|
||||
* it will try to load module from directory: directory '/a/b/c' should exist and it should have either 'package.json' with
|
||||
* 'typings' entry or file 'index' with some supported extension
|
||||
* - Classic loader will only try to interpret '/a/b/c' as file.
|
||||
*/
|
||||
type ResolutionKindSpecificLoader = (candidate: string, extensions: string[], failedLookupLocations: string[], onlyRecordFailures: boolean, state: ModuleResolutionState) => string;
|
||||
|
||||
/**
|
||||
* patternStrings contains both pattern strings (containing "*") and regular strings.
|
||||
* Return an exact match if possible, or a pattern match, or undefined.
|
||||
@@ -569,8 +566,8 @@ namespace ts {
|
||||
|
||||
function isPatternMatch({prefix, suffix}: Pattern, candidate: string) {
|
||||
return candidate.length >= prefix.length + suffix.length &&
|
||||
startsWith(candidate, prefix) &&
|
||||
endsWith(candidate, suffix);
|
||||
startsWith(candidate, prefix) &&
|
||||
endsWith(candidate, suffix);
|
||||
}
|
||||
|
||||
/* @internal */
|
||||
@@ -584,14 +581,233 @@ namespace ts {
|
||||
};
|
||||
}
|
||||
|
||||
export function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
|
||||
const containingDirectory = getDirectoryPath(containingFile);
|
||||
const supportedExtensions = getSupportedExtensions(compilerOptions);
|
||||
const traceEnabled = isTraceEnabled(compilerOptions, host);
|
||||
|
||||
const failedLookupLocations: string[] = [];
|
||||
const state = { compilerOptions, host, traceEnabled, skipTsx: false };
|
||||
let resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName,
|
||||
failedLookupLocations, supportedExtensions, state);
|
||||
|
||||
let isExternalLibraryImport = false;
|
||||
if (!resolvedFileName) {
|
||||
if (moduleHasNonRelativeName(moduleName)) {
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
|
||||
}
|
||||
resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state, /*checkOneLevel*/ false);
|
||||
isExternalLibraryImport = resolvedFileName !== undefined;
|
||||
}
|
||||
else {
|
||||
const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
|
||||
resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
|
||||
}
|
||||
}
|
||||
|
||||
if (resolvedFileName && host.realpath) {
|
||||
const originalFileName = resolvedFileName;
|
||||
resolvedFileName = normalizePath(host.realpath(resolvedFileName));
|
||||
if (traceEnabled) {
|
||||
trace(host, Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
|
||||
}
|
||||
}
|
||||
|
||||
return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
|
||||
}
|
||||
|
||||
function nodeLoadModuleByRelativeName(candidate: string, supportedExtensions: string[], failedLookupLocations: string[],
|
||||
onlyRecordFailures: boolean, state: ModuleResolutionState): string {
|
||||
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
|
||||
}
|
||||
|
||||
const resolvedFileName = !pathEndsWithDirectorySeparator(candidate) && loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
|
||||
|
||||
return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
|
||||
}
|
||||
|
||||
/* @internal */
|
||||
export function directoryProbablyExists(directoryName: string, host: { directoryExists?: (directoryName: string) => boolean }): boolean {
|
||||
// if host does not support 'directoryExists' assume that directory will exist
|
||||
return !host.directoryExists || host.directoryExists(directoryName);
|
||||
}
|
||||
|
||||
/* @internal */
|
||||
export function pathToPackageJson(directory: string): string {
|
||||
/**
|
||||
* @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
|
||||
* in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
|
||||
*/
|
||||
function loadModuleFromFile(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
|
||||
// First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
|
||||
const resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
|
||||
if (resolvedByAddingExtension) {
|
||||
return resolvedByAddingExtension;
|
||||
}
|
||||
|
||||
// If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
|
||||
// e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
|
||||
if (hasJavaScriptFileExtension(candidate)) {
|
||||
const extensionless = removeFileExtension(candidate);
|
||||
if (state.traceEnabled) {
|
||||
const extension = candidate.substring(extensionless.length);
|
||||
trace(state.host, Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
|
||||
}
|
||||
return tryAddingExtensions(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
|
||||
}
|
||||
}
|
||||
|
||||
/** Try to return an existing file that adds one of the `extensions` to `candidate`. */
|
||||
function tryAddingExtensions(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
|
||||
if (!onlyRecordFailures) {
|
||||
// check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
|
||||
const directory = getDirectoryPath(candidate);
|
||||
if (directory) {
|
||||
onlyRecordFailures = !directoryProbablyExists(directory, state.host);
|
||||
}
|
||||
}
|
||||
return forEach(extensions, ext =>
|
||||
!(state.skipTsx && isJsxOrTsxExtension(ext)) && tryFile(candidate + ext, failedLookupLocation, onlyRecordFailures, state));
|
||||
}
|
||||
|
||||
/** Return the file if it exists. */
|
||||
function tryFile(fileName: string, failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
|
||||
if (!onlyRecordFailures && state.host.fileExists(fileName)) {
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
|
||||
}
|
||||
return fileName;
|
||||
}
|
||||
else {
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.File_0_does_not_exist, fileName);
|
||||
}
|
||||
failedLookupLocation.push(fileName);
|
||||
return undefined;
|
||||
}
|
||||
}
|
||||
|
||||
function loadNodeModuleFromDirectory(extensions: string[], candidate: string, failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
|
||||
const packageJsonPath = pathToPackageJson(candidate);
|
||||
const directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
|
||||
if (directoryExists && state.host.fileExists(packageJsonPath)) {
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.Found_package_json_at_0, packageJsonPath);
|
||||
}
|
||||
const typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
|
||||
if (typesFile) {
|
||||
const onlyRecordFailures = !directoryProbablyExists(getDirectoryPath(typesFile), state.host);
|
||||
// A package.json "typings" may specify an exact filename, or may choose to omit an extension.
|
||||
const result = tryFile(typesFile, failedLookupLocation, onlyRecordFailures, state) ||
|
||||
tryAddingExtensions(typesFile, extensions, failedLookupLocation, onlyRecordFailures, state);
|
||||
if (result) {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
else {
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.package_json_does_not_have_types_field);
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
if (state.traceEnabled) {
|
||||
trace(state.host, Diagnostics.File_0_does_not_exist, packageJsonPath);
|
||||
}
|
||||
// record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
|
||||
failedLookupLocation.push(packageJsonPath);
|
||||
}
|
||||
|
||||
return loadModuleFromFile(combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
|
||||
}
|
||||
|
||||
function pathToPackageJson(directory: string): string {
|
||||
return combinePaths(directory, "package.json");
|
||||
}
|
||||
|
||||
function loadModuleFromNodeModulesFolder(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState): string {
|
||||
const nodeModulesFolder = combinePaths(directory, "node_modules");
|
||||
const nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
|
||||
const candidate = normalizePath(combinePaths(nodeModulesFolder, moduleName));
|
||||
const supportedExtensions = getSupportedExtensions(state.compilerOptions);
|
||||
|
||||
let result = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
|
||||
if (result) {
|
||||
return result;
|
||||
}
|
||||
result = loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
|
||||
if (result) {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
/* @internal */
|
||||
export function loadModuleFromNodeModules(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState, checkOneLevel: boolean): string {
|
||||
directory = normalizeSlashes(directory);
|
||||
while (true) {
|
||||
const baseName = getBaseFileName(directory);
|
||||
if (baseName !== "node_modules") {
|
||||
// Try to load source from the package
|
||||
const packageResult = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state);
|
||||
if (packageResult && hasTypeScriptFileExtension(packageResult)) {
|
||||
// Always prefer a TypeScript (.ts, .tsx, .d.ts) file shipped with the package
|
||||
return packageResult;
|
||||
}
|
||||
else {
|
||||
// Else prefer a types package over non-TypeScript results (e.g. JavaScript files)
|
||||
const typesResult = loadModuleFromNodeModulesFolder(combinePaths("@types", moduleName), directory, failedLookupLocations, state);
|
||||
if (typesResult || packageResult) {
|
||||
return typesResult || packageResult;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const parentPath = getDirectoryPath(directory);
|
||||
if (parentPath === directory || checkOneLevel) {
|
||||
break;
|
||||
}
|
||||
|
||||
directory = parentPath;
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
|
||||
export function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
|
||||
const traceEnabled = isTraceEnabled(compilerOptions, host);
|
||||
const state = { compilerOptions, host, traceEnabled, skipTsx: !compilerOptions.jsx };
|
||||
const failedLookupLocations: string[] = [];
|
||||
const supportedExtensions = getSupportedExtensions(compilerOptions);
|
||||
let containingDirectory = getDirectoryPath(containingFile);
|
||||
|
||||
const resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
|
||||
if (resolvedFileName) {
|
||||
return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/false, failedLookupLocations);
|
||||
}
|
||||
|
||||
let referencedSourceFile: string;
|
||||
if (moduleHasNonRelativeName(moduleName)) {
|
||||
while (true) {
|
||||
const searchName = normalizePath(combinePaths(containingDirectory, moduleName));
|
||||
referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
|
||||
if (referencedSourceFile) {
|
||||
break;
|
||||
}
|
||||
const parentPath = getDirectoryPath(containingDirectory);
|
||||
if (parentPath === containingDirectory) {
|
||||
break;
|
||||
}
|
||||
containingDirectory = parentPath;
|
||||
}
|
||||
}
|
||||
else {
|
||||
const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
|
||||
referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
|
||||
}
|
||||
|
||||
|
||||
return referencedSourceFile
|
||||
? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations }
|
||||
: { resolvedModule: undefined, failedLookupLocations };
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user