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import {
__String,
addInternalEmitFlags,
addRange,
addRelatedInfo,
append,
arrayIsEqualTo,
AsExpression,
BuilderProgram,
CancellationToken,
canHaveDecorators,
canHaveIllegalDecorators,
chainDiagnosticMessages,
changeExtension,
changesAffectingProgramStructure,
changesAffectModuleResolution,
combinePaths,
commandLineOptionOfCustomType,
CommentDirective,
CommentDirectivesMap,
compareDataObjects,
comparePaths,
compareValues,
Comparison,
CompilerHost,
CompilerOptions,
computeLineAndCharacterOfPosition,
concatenate,
contains,
containsIgnoredPath,
containsPath,
convertToRelativePath,
createCommentDirectivesMap,
createCompilerDiagnostic,
createCompilerDiagnosticFromMessageChain,
createDiagnosticForNodeFromMessageChain,
createDiagnosticForNodeInSourceFile,
createDiagnosticForRange,
createFileDiagnostic,
createGetCanonicalFileName,
createModeAwareCache,
createModeAwareCacheKey,
createModuleResolutionCache,
createMultiMap,
createProgramDiagnostics,
CreateProgramOptions,
createSourceFile,
CreateSourceFileOptions,
createSymlinkCache,
createTypeChecker,
createTypeReferenceDirectiveResolutionCache,
CustomTransformers,
Debug,
DeclarationWithTypeParameterChildren,
Diagnostic,
DiagnosticArguments,
DiagnosticCategory,
diagnosticCategoryName,
DiagnosticMessage,
DiagnosticMessageChain,
DiagnosticReporter,
Diagnostics,
DiagnosticWithLocation,
directorySeparator,
DirectoryStructureHost,
emitFiles,
EmitHost,
emitModuleKindIsNonNodeESM,
EmitOnly,
emitResolverSkipsTypeChecking,
EmitResult,
emptyArray,
ensureTrailingDirectorySeparator,
exclusivelyPrefixedNodeCoreModules,
ExportAssignment,
ExportDeclaration,
Extension,
extensionFromPath,
externalHelpersModuleNameText,
factory,
fileExtensionIs,
fileExtensionIsOneOf,
FileIncludeKind,
FileIncludeReason,
FilePreprocessingDiagnosticsKind,
FileReference,
filter,
find,
findIndex,
firstDefinedIterator,
flatMap,
flatten,
forEach,
forEachAncestorDirectory,
forEachChildRecursively,
forEachDynamicImportOrRequireCall,
forEachEmittedFile,
forEachEntry,
forEachKey,
forEachOptionsSyntaxByName,
forEachProjectReference,
forEachPropertyAssignment,
forEachResolvedProjectReference as ts_forEachResolvedProjectReference,
forEachTsConfigPropArray,
FunctionLikeDeclaration,
getAllowJSCompilerOption,
getAutomaticTypeDirectiveNames,
getBaseFileName,
GetCanonicalFileName,
getCommonSourceDirectory as ts_getCommonSourceDirectory,
getCommonSourceDirectoryOfConfig,
getDeclarationDiagnostics as ts_getDeclarationDiagnostics,
getDefaultLibFileName,
getDirectoryPath,
getEmitDeclarations,
getEmitModuleKind,
getEmitModuleResolutionKind,
getEmitScriptTarget,
getErrorSpanForNode,
getExternalModuleName,
getIsolatedModules,
getJSXImplicitImportBase,
getJSXRuntimeImport,
getLibFileNameFromLibReference,
getLineAndCharacterOfPosition,
getLineStarts,
getNewLineCharacter,
getNormalizedAbsolutePath,
getNormalizedAbsolutePathWithoutRoot,
getNormalizedPathComponents,
getOutputDeclarationFileName,
getPackageScopeForPath,
getPathFromPathComponents,
getPositionOfLineAndCharacter,
getResolvedModuleFromResolution,
getResolvedTypeReferenceDirectiveFromResolution,
getResolveJsonModule,
getRootLength,
getSetExternalModuleIndicator,
getSourceFileOfNode,
getStrictOptionValue,
getSupportedExtensions,
getSupportedExtensionsWithJsonIfResolveJsonModule,
getTemporaryModuleResolutionState,
getTextOfIdentifierOrLiteral,
getTransformers,
getTsBuildInfoEmitOutputFilePath,
getTsConfigObjectLiteralExpression,
getTypesPackageName,
HasChangedAutomaticTypeDirectiveNames,
hasChangesInResolutions,
hasExtension,
HasInvalidatedLibResolutions,
HasInvalidatedResolutions,
hasJSFileExtension,
hasJsonModuleEmitEnabled,
hasProperty,
hasSyntacticModifier,
hasZeroOrOneAsteriskCharacter,
HeritageClause,
Identifier,
identity,
ImportAttributes,
ImportClause,
ImportDeclaration,
ImportOrExportSpecifier,
importSyntaxAffectsModuleResolution,
InternalEmitFlags,
inverseJsxOptionMap,
isAmbientModule,
isAnyImportOrReExport,
isArray,
isArrayLiteralExpression,
isBuildInfoFile,
isCheckJsEnabledForFile,
isClassDeclaration,
isDeclarationFileName,
isDecorator,
isDefaultModifier,
isExportDeclaration,
isExportModifier,
isExternalModule,
isExternalModuleNameRelative,
isIdentifierText,
isImportCall,
isImportDeclaration,
isImportEqualsDeclaration,
isImportSpecifier,
isImportTypeNode,
isInJSFile,
isJSDocImportTag,
isModifier,
isModuleDeclaration,
isObjectLiteralExpression,
isParameter,
isPlainJsFile,
isRequireCall,
isRootedDiskPath,
isSourceFileJS,
isString,
isStringLiteral,
isStringLiteralLike,
isTraceEnabled,
JSDocImportTag,
JsonSourceFile,
JsxEmit,
length,
LibResolution,
libs,
mapDefined,
maybeBind,
memoize,
MethodDeclaration,
ModeAwareCache,
ModeAwareCacheKey,
ModifierFlags,
ModifierLike,
ModuleBlock,
ModuleDeclaration,
ModuleKind,
ModuleResolutionCache,
ModuleResolutionHost,
moduleResolutionIsEqualTo,
ModuleResolutionKind,
moduleResolutionSupportsPackageJsonExportsAndImports,
Mutable,
Node,
NodeArray,
NodeFlags,
nodeModulesPathPart,
NodeWithTypeArguments,
noop,
normalizePath,
notImplementedResolver,
noTransformers,
ObjectLiteralExpression,
OperationCanceledException,
optionDeclarations,
optionsHaveChanges,
PackageId,
packageIdToPackageName,
packageIdToString,
PackageJsonInfoCache,
ParameterDeclaration,
ParseConfigFileHost,
ParsedCommandLine,
parseIsolatedEntityName,
parseJsonSourceFileConfigFileContent,
parseNodeFactory,
Path,
pathContainsNodeModules,
pathIsAbsolute,
pathIsRelative,
Program,
ProgramHost,
ProjectReference,
ProjectReferenceFile,
projectReferenceIsEqualTo,
PropertyAssignment,
PropertyDeclaration,
ReferencedFile,
removeFileExtension,
removePrefix,
removeSuffix,
resolutionExtensionIsTSOrJson,
ResolutionMode,
ResolutionWithFailedLookupLocations,
resolveConfigFileProjectName,
ResolvedConfigFileName,
ResolvedModuleFull,
ResolvedModuleWithFailedLookupLocations,
ResolvedProjectReference,
ResolvedRefAndOutputDts,
ResolvedRefAndSource,
ResolvedTypeReferenceDirectiveWithFailedLookupLocations,
resolveLibrary,
resolveModuleName,
resolveTypeReferenceDirective,
returnFalse,
returnUndefined,
SatisfiesExpression,
ScriptKind,
ScriptTarget,
setParent,
setParentRecursive,
skipTrivia,
skipTypeChecking,
some,
sortAndDeduplicateDiagnostics,
SortedReadonlyArray,
SourceFile,
sourceFileAffectingCompilerOptions,
sourceFileMayBeEmitted,
startsWith,
Statement,
StringLiteral,
StringLiteralLike,
StructureIsReused,
supportedJSExtensionsFlat,
SymlinkCache,
SyntaxKind,
sys,
System,
toFileNameLowerCase,
tokenToString,
toPath as ts_toPath,
toSorted,
trace,
tracing,
tryCast,
TypeChecker,
typeDirectiveIsEqualTo,
TypeReferenceDirectiveResolutionCache,
unprefixedNodeCoreModules,
VariableDeclaration,
VariableStatement,
Version,
versionMajorMinor,
walkUpParenthesizedExpressions,
WriteFileCallback,
WriteFileCallbackData,
writeFileEnsuringDirectories,
} from "./_namespaces/ts.js";
import * as performance from "./_namespaces/ts.performance.js";
export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName = "tsconfig.json"): string | undefined {
return forEachAncestorDirectory(searchPath, ancestor => {
const fileName = combinePaths(ancestor, configName);
return fileExists(fileName) ? fileName : undefined;
});
}
export function resolveTripleslashReference(moduleName: string, containingFile: string): string {
const basePath = getDirectoryPath(containingFile);
const referencedFileName = isRootedDiskPath(moduleName) ? moduleName : combinePaths(basePath, moduleName);
return normalizePath(referencedFileName);
}
/** @internal */
export function computeCommonSourceDirectoryOfFilenames(fileNames: readonly string[], currentDirectory: string, getCanonicalFileName: GetCanonicalFileName): string {
let commonPathComponents: string[] | undefined;
const failed = forEach(fileNames, sourceFile => {
// Each file contributes into common source file path
const sourcePathComponents = getNormalizedPathComponents(sourceFile, currentDirectory);
sourcePathComponents.pop(); // The base file name is not part of the common directory path
if (!commonPathComponents) {
// first file
commonPathComponents = sourcePathComponents;
return;
}
const n = Math.min(commonPathComponents.length, sourcePathComponents.length);
for (let i = 0; i < n; i++) {
if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
if (i === 0) {
// Failed to find any common path component
return true;
}
// New common path found that is 0 -> i-1
commonPathComponents.length = i;
break;
}
}
// If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
if (sourcePathComponents.length < commonPathComponents.length) {
commonPathComponents.length = sourcePathComponents.length;
}
});
// A common path can not be found when paths span multiple drives on windows, for example
if (failed) {
return "";
}
if (!commonPathComponents) { // Can happen when all input files are .d.ts files
return currentDirectory;
}
return getPathFromPathComponents(commonPathComponents);
}
export function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost {
return createCompilerHostWorker(options, setParentNodes);
}
/** @internal */
export function createGetSourceFile(
readFile: ProgramHost<any>["readFile"],
setParentNodes: boolean | undefined,
): CompilerHost["getSourceFile"] {
return (fileName, languageVersionOrOptions, onError) => {
let text: string | undefined;
try {
performance.mark("beforeIORead");
text = readFile(fileName);
performance.mark("afterIORead");
performance.measure("I/O Read", "beforeIORead", "afterIORead");
}
catch (e) {
if (onError) {
onError(e.message);
}
text = "";
}
return text !== undefined ? createSourceFile(fileName, text, languageVersionOrOptions, setParentNodes) : undefined;
};
}
/** @internal */
export function createWriteFileMeasuringIO(
actualWriteFile: (path: string, data: string, writeByteOrderMark: boolean) => void,
createDirectory: (path: string) => void,
directoryExists: (path: string) => boolean,
): CompilerHost["writeFile"] {
return (fileName, data, writeByteOrderMark, onError) => {
try {
performance.mark("beforeIOWrite");
// NOTE: If patchWriteFileEnsuringDirectory has been called,
// the system.writeFile will do its own directory creation and
// the ensureDirectoriesExist call will always be redundant.
writeFileEnsuringDirectories(
fileName,
data,
writeByteOrderMark,
actualWriteFile,
createDirectory,
directoryExists,
);
performance.mark("afterIOWrite");
performance.measure("I/O Write", "beforeIOWrite", "afterIOWrite");
}
catch (e) {
if (onError) {
onError(e.message);
}
}
};
}
/** @internal */
export function createCompilerHostWorker(
options: CompilerOptions,
setParentNodes?: boolean,
system: System = sys,
): CompilerHost {
const existingDirectories = new Map<string, boolean>();
const getCanonicalFileName = createGetCanonicalFileName(system.useCaseSensitiveFileNames);
function directoryExists(directoryPath: string): boolean {
if (existingDirectories.has(directoryPath)) {
return true;
}
if ((compilerHost.directoryExists || system.directoryExists)(directoryPath)) {
existingDirectories.set(directoryPath, true);
return true;
}
return false;
}
function getDefaultLibLocation(): string {
return getDirectoryPath(normalizePath(system.getExecutingFilePath()));
}
const newLine = getNewLineCharacter(options);
const realpath = system.realpath && ((path: string) => system.realpath!(path));
const compilerHost: CompilerHost = {
getSourceFile: createGetSourceFile(fileName => compilerHost.readFile(fileName), setParentNodes),
getDefaultLibLocation,
getDefaultLibFileName: options => combinePaths(getDefaultLibLocation(), getDefaultLibFileName(options)),
writeFile: createWriteFileMeasuringIO(
(path, data, writeByteOrderMark) => system.writeFile(path, data, writeByteOrderMark),
path => (compilerHost.createDirectory || system.createDirectory)(path),
path => directoryExists(path),
),
getCurrentDirectory: memoize(() => system.getCurrentDirectory()),
useCaseSensitiveFileNames: () => system.useCaseSensitiveFileNames,
getCanonicalFileName,
getNewLine: () => newLine,
fileExists: fileName => system.fileExists(fileName),
readFile: fileName => system.readFile(fileName),
trace: (s: string) => system.write(s + newLine),
directoryExists: directoryName => system.directoryExists(directoryName),
getEnvironmentVariable: name => system.getEnvironmentVariable ? system.getEnvironmentVariable(name) : "",
getDirectories: (path: string) => system.getDirectories(path),
realpath,
readDirectory: (path, extensions, include, exclude, depth) => system.readDirectory(path, extensions, include, exclude, depth),
createDirectory: d => system.createDirectory(d),
createHash: maybeBind(system, system.createHash),
};
return compilerHost;
}
/** @internal */
export interface CompilerHostLikeForCache {
fileExists(fileName: string): boolean;
readFile(fileName: string, encoding?: string): string | undefined;
directoryExists?(directory: string): boolean;
createDirectory?(directory: string): void;
writeFile?: WriteFileCallback;
}
/** @internal */
export interface CompilerHostLikeWithCache {
originalReadFile: (fileName: string, encoding?: string) => string | undefined;
originalFileExists: (fileName: string) => boolean;
originalDirectoryExists: ((directory: string) => boolean) | undefined;
originalCreateDirectory: ((directory: string) => void) | undefined;
originalWriteFile: WriteFileCallback | undefined;
getSourceFileWithCache: ((fileName: string, languageVersionOrOptions: ScriptTarget | CreateSourceFileOptions, onError?: (message: string) => void, shouldCreateNewSourceFile?: boolean) => SourceFile | undefined) | undefined;
readFileWithCache: (fileName: string) => string | undefined;
}
/** @internal */
export function changeCompilerHostLikeToUseCache(
host: CompilerHostLikeForCache,
toPath: (fileName: string) => Path,
getSourceFile?: CompilerHost["getSourceFile"],
): CompilerHostLikeWithCache {
const originalReadFile = host.readFile;
const originalFileExists = host.fileExists;
const originalDirectoryExists = host.directoryExists;
const originalCreateDirectory = host.createDirectory;
const originalWriteFile = host.writeFile;
const readFileCache = new Map<Path, string | false>();
const fileExistsCache = new Map<Path, boolean>();
const directoryExistsCache = new Map<Path, boolean>();
const sourceFileCache = new Map<ResolutionMode, Map<Path, SourceFile>>();
const readFileWithCache = (fileName: string): string | undefined => {
const key = toPath(fileName);
const value = readFileCache.get(key);
if (value !== undefined) return value !== false ? value : undefined;
return setReadFileCache(key, fileName);
};
const setReadFileCache = (key: Path, fileName: string) => {
const newValue = originalReadFile.call(host, fileName);
readFileCache.set(key, newValue !== undefined ? newValue : false);
return newValue;
};
host.readFile = fileName => {
const key = toPath(fileName);
const value = readFileCache.get(key);
if (value !== undefined) return value !== false ? value : undefined; // could be .d.ts from output
// Cache json or buildInfo
if (!fileExtensionIs(fileName, Extension.Json) && !isBuildInfoFile(fileName)) {
return originalReadFile.call(host, fileName);
}
return setReadFileCache(key, fileName);
};
const getSourceFileWithCache: CompilerHost["getSourceFile"] | undefined = getSourceFile ? (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) => {
const key = toPath(fileName);
const impliedNodeFormat: ResolutionMode = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
const forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
const value = forImpliedNodeFormat?.get(key);
if (value) return value;
const sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
if (sourceFile && (isDeclarationFileName(fileName) || fileExtensionIs(fileName, Extension.Json))) {
sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new Map()).set(key, sourceFile));
}
return sourceFile;
} : undefined;
// fileExists for any kind of extension
host.fileExists = fileName => {
const key = toPath(fileName);
const value = fileExistsCache.get(key);
if (value !== undefined) return value;
const newValue = originalFileExists.call(host, fileName);
fileExistsCache.set(key, !!newValue);
return newValue;
};
if (originalWriteFile) {
host.writeFile = (fileName, data, ...rest) => {
const key = toPath(fileName);
fileExistsCache.delete(key);
const value = readFileCache.get(key);
if (value !== undefined && value !== data) {
readFileCache.delete(key);
sourceFileCache.forEach(map => map.delete(key));
}
else if (getSourceFileWithCache) {
sourceFileCache.forEach(map => {
const sourceFile = map.get(key);
if (sourceFile && sourceFile.text !== data) {
map.delete(key);
}
});
}
originalWriteFile.call(host, fileName, data, ...rest);
};
}
// directoryExists
if (originalDirectoryExists) {
host.directoryExists = directory => {
const key = toPath(directory);
const value = directoryExistsCache.get(key);
if (value !== undefined) return value;
const newValue = originalDirectoryExists.call(host, directory);
directoryExistsCache.set(key, !!newValue);
return newValue;
};
if (originalCreateDirectory) {
host.createDirectory = directory => {
const key = toPath(directory);
directoryExistsCache.delete(key);
originalCreateDirectory.call(host, directory);
};
}
}
return {
originalReadFile,
originalFileExists,
originalDirectoryExists,
originalCreateDirectory,
originalWriteFile,
getSourceFileWithCache,
readFileWithCache,
};
}
export function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): readonly Diagnostic[];
/** @internal */ export function getPreEmitDiagnostics(program: BuilderProgram, sourceFile?: SourceFile, cancellationToken?: CancellationToken): readonly Diagnostic[]; // eslint-disable-line @typescript-eslint/unified-signatures
export function getPreEmitDiagnostics(program: Program | BuilderProgram, sourceFile?: SourceFile, cancellationToken?: CancellationToken): readonly Diagnostic[] {
let diagnostics: Diagnostic[] | undefined;
diagnostics = addRange(diagnostics, program.getConfigFileParsingDiagnostics());
diagnostics = addRange(diagnostics, program.getOptionsDiagnostics(cancellationToken));
diagnostics = addRange(diagnostics, program.getSyntacticDiagnostics(sourceFile, cancellationToken));
diagnostics = addRange(diagnostics, program.getGlobalDiagnostics(cancellationToken));
diagnostics = addRange(diagnostics, program.getSemanticDiagnostics(sourceFile, cancellationToken));
if (getEmitDeclarations(program.getCompilerOptions())) {
diagnostics = addRange(diagnostics, program.getDeclarationDiagnostics(sourceFile, cancellationToken));
}
return sortAndDeduplicateDiagnostics(diagnostics || emptyArray);
}
export interface FormatDiagnosticsHost {
getCurrentDirectory(): string;
getCanonicalFileName(fileName: string): string;
getNewLine(): string;
}
export function formatDiagnostics(diagnostics: readonly Diagnostic[], host: FormatDiagnosticsHost): string {
let output = "";
for (const diagnostic of diagnostics) {
output += formatDiagnostic(diagnostic, host);
}
return output;
}
export function formatDiagnostic(diagnostic: Diagnostic, host: FormatDiagnosticsHost): string {
const errorMessage = `${diagnosticCategoryName(diagnostic)} TS${diagnostic.code}: ${flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine())}${host.getNewLine()}`;
if (diagnostic.file) {
const { line, character } = getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start!); // TODO: GH#18217
const fileName = diagnostic.file.fileName;
const relativeFileName = convertToRelativePath(fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName));
return `${relativeFileName}(${line + 1},${character + 1}): ` + errorMessage;
}
return errorMessage;
}
/** @internal */
export enum ForegroundColorEscapeSequences {
Grey = "\u001b[90m",
Red = "\u001b[91m",
Yellow = "\u001b[93m",
Blue = "\u001b[94m",
Cyan = "\u001b[96m",
}
const gutterStyleSequence = "\u001b[7m";
const gutterSeparator = " ";
const resetEscapeSequence = "\u001b[0m";
const ellipsis = "...";
const halfIndent = " ";
const indent = " ";
function getCategoryFormat(category: DiagnosticCategory): ForegroundColorEscapeSequences {
switch (category) {
case DiagnosticCategory.Error:
return ForegroundColorEscapeSequences.Red;
case DiagnosticCategory.Warning:
return ForegroundColorEscapeSequences.Yellow;
case DiagnosticCategory.Suggestion:
return Debug.fail("Should never get an Info diagnostic on the command line.");
case DiagnosticCategory.Message:
return ForegroundColorEscapeSequences.Blue;
}
}
/** @internal */
export function formatColorAndReset(text: string, formatStyle: string): string {
return formatStyle + text + resetEscapeSequence;
}
function formatCodeSpan(file: SourceFile, start: number, length: number, indent: string, squiggleColor: ForegroundColorEscapeSequences, host: FormatDiagnosticsHost) {
const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start);
const { line: lastLine, character: lastLineChar } = getLineAndCharacterOfPosition(file, start + length);
const lastLineInFile = getLineAndCharacterOfPosition(file, file.text.length).line;
const hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
let gutterWidth = (lastLine + 1 + "").length;
if (hasMoreThanFiveLines) {
gutterWidth = Math.max(ellipsis.length, gutterWidth);
}
let context = "";
for (let i = firstLine; i <= lastLine; i++) {
context += host.getNewLine();
// If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
// so we'll skip ahead to the second-to-last line.
if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
context += indent + formatColorAndReset(ellipsis.padStart(gutterWidth), gutterStyleSequence) + gutterSeparator + host.getNewLine();
i = lastLine - 1;
}
const lineStart = getPositionOfLineAndCharacter(file, i, 0);
const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
let lineContent = file.text.slice(lineStart, lineEnd);
lineContent = lineContent.trimEnd(); // trim from end
lineContent = lineContent.replace(/\t/g, " "); // convert tabs to single spaces
// Output the gutter and the actual contents of the line.
context += indent + formatColorAndReset((i + 1 + "").padStart(gutterWidth), gutterStyleSequence) + gutterSeparator;
context += lineContent + host.getNewLine();
// Output the gutter and the error span for the line using tildes.
context += indent + formatColorAndReset("".padStart(gutterWidth), gutterStyleSequence) + gutterSeparator;
context += squiggleColor;
if (i === firstLine) {
// If we're on the last line, then limit it to the last character of the last line.
// Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
const lastCharForLine = i === lastLine ? lastLineChar : undefined;
context += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
context += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
}
else if (i === lastLine) {
context += lineContent.slice(0, lastLineChar).replace(/./g, "~");
}
else {
// Squiggle the entire line.
context += lineContent.replace(/./g, "~");
}
context += resetEscapeSequence;
}
return context;
}
/** @internal */
export function formatLocation(file: SourceFile, start: number, host: FormatDiagnosticsHost, color: typeof formatColorAndReset = formatColorAndReset): string {
const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start); // TODO: GH#18217
const relativeFileName = host ? convertToRelativePath(file.fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName)) : file.fileName;
let output = "";
output += color(relativeFileName, ForegroundColorEscapeSequences.Cyan);
output += ":";
output += color(`${firstLine + 1}`, ForegroundColorEscapeSequences.Yellow);
output += ":";
output += color(`${firstLineChar + 1}`, ForegroundColorEscapeSequences.Yellow);
return output;
}
export function formatDiagnosticsWithColorAndContext(diagnostics: readonly Diagnostic[], host: FormatDiagnosticsHost): string {
let output = "";
for (const diagnostic of diagnostics) {
if (diagnostic.file) {
const { file, start } = diagnostic;
output += formatLocation(file, start!, host); // TODO: GH#18217
output += " - ";
}
output += formatColorAndReset(diagnosticCategoryName(diagnostic), getCategoryFormat(diagnostic.category));
output += formatColorAndReset(` TS${diagnostic.code}: `, ForegroundColorEscapeSequences.Grey);
output += flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine());
if (diagnostic.file && diagnostic.code !== Diagnostics.File_appears_to_be_binary.code) {
output += host.getNewLine();
output += formatCodeSpan(diagnostic.file, diagnostic.start!, diagnostic.length!, "", getCategoryFormat(diagnostic.category), host); // TODO: GH#18217
}
if (diagnostic.relatedInformation) {
output += host.getNewLine();
for (const { file, start, length, messageText } of diagnostic.relatedInformation) {
if (file) {
output += host.getNewLine();
output += halfIndent + formatLocation(file, start!, host); // TODO: GH#18217
output += formatCodeSpan(file, start!, length!, indent, ForegroundColorEscapeSequences.Cyan, host); // TODO: GH#18217
}
output += host.getNewLine();
output += indent + flattenDiagnosticMessageText(messageText, host.getNewLine());
}
}
output += host.getNewLine();
}
return output;
}
export function flattenDiagnosticMessageText(diag: string | DiagnosticMessageChain | undefined, newLine: string, indent = 0): string {
if (isString(diag)) {
return diag;
}
else if (diag === undefined) {
return "";
}
let result = "";
if (indent) {
result += newLine;
for (let i = 0; i < indent; i++) {
result += " ";
}
}
result += diag.messageText;
indent++;
if (diag.next) {
for (const kid of diag.next) {
result += flattenDiagnosticMessageText(kid, newLine, indent);
}
}
return result;
}
/**
* Subset of a SourceFile used to calculate index-based resolutions
* This includes some internal fields, so unless you have very good reason,
* (and are willing to use some less stable internals) you should probably just pass a SourceFile.
*
* @internal
*/
export interface SourceFileImportsList {
imports: SourceFile["imports"];
moduleAugmentations: SourceFile["moduleAugmentations"];
impliedNodeFormat?: ResolutionMode;
fileName: string;
packageJsonScope?: SourceFile["packageJsonScope"];
}
/**
* Calculates the resulting resolution mode for some reference in some file - this is generally the explicitly
* provided resolution mode in the reference, unless one is not present, in which case it is the mode of the containing file.
*/
export function getModeForFileReference(ref: FileReference | string, containingFileMode: ResolutionMode): ResolutionMode {
return (isString(ref) ? containingFileMode : ref.resolutionMode) || containingFileMode;
}
/**
* Use `program.getModeForResolutionAtIndex`, which retrieves the correct `compilerOptions`, instead of this function whenever possible.
* Calculates the final resolution mode for an import at some index within a file's `imports` list. This is the resolution mode
* explicitly provided via import attributes, if present, or the syntax the usage would have if emitted to JavaScript. In
* `--module node16` or `nodenext`, this may depend on the file's `impliedNodeFormat`. In `--module preserve`, it depends only on the
* input syntax of the reference. In other `module` modes, when overriding import attributes are not provided, this function returns
* `undefined`, as the result would have no impact on module resolution, emit, or type checking.
* @param file File to fetch the resolution mode within
* @param index Index into the file's complete resolution list to get the resolution of - this is a concatenation of the file's imports and module augmentations
* @param compilerOptions The compiler options for the program that owns the file. If the file belongs to a referenced project, the compiler options
* should be the options of the referenced project, not the referencing project.
*/
export function getModeForResolutionAtIndex(file: SourceFile, index: number, compilerOptions: CompilerOptions): ResolutionMode;
/** @internal @knipignore */
// eslint-disable-next-line @typescript-eslint/unified-signatures
export function getModeForResolutionAtIndex(file: SourceFileImportsList, index: number, compilerOptions: CompilerOptions): ResolutionMode;
export function getModeForResolutionAtIndex(file: SourceFileImportsList, index: number, compilerOptions?: CompilerOptions): ResolutionMode {
// we ensure all elements of file.imports and file.moduleAugmentations have the relevant parent pointers set during program setup,
// so it's safe to use them even pre-bind
return getModeForUsageLocationWorker(file, getModuleNameStringLiteralAt(file, index), compilerOptions);
}
/** @internal */
export function isExclusivelyTypeOnlyImportOrExport(decl: ImportDeclaration | ExportDeclaration | JSDocImportTag): boolean {
if (isExportDeclaration(decl)) {
return decl.isTypeOnly;
}
if (decl.importClause?.isTypeOnly) {
return true;
}
return false;
}
/**
* Use `program.getModeForUsageLocation`, which retrieves the correct `compilerOptions`, instead of this function whenever possible.
* Calculates the final resolution mode for a given module reference node. This function only returns a result when module resolution
* settings allow differing resolution between ESM imports and CJS requires, or when a mode is explicitly provided via import attributes,
* which cause an `import` or `require` condition to be used during resolution regardless of module resolution settings. In absence of
* overriding attributes, and in modes that support differing resolution, the result indicates the syntax the usage would emit to JavaScript.
* Some examples:
*
* ```ts
* // tsc foo.mts --module nodenext
* import {} from "mod";
* // Result: ESNext - the import emits as ESM due to `impliedNodeFormat` set by .mts file extension
*
* // tsc foo.cts --module nodenext
* import {} from "mod";
* // Result: CommonJS - the import emits as CJS due to `impliedNodeFormat` set by .cts file extension
*
* // tsc foo.ts --module preserve --moduleResolution bundler
* import {} from "mod";
* // Result: ESNext - the import emits as ESM due to `--module preserve` and `--moduleResolution bundler`
* // supports conditional imports/exports
*
* // tsc foo.ts --module preserve --moduleResolution node10
* import {} from "mod";
* // Result: undefined - the import emits as ESM due to `--module preserve`, but `--moduleResolution node10`
* // does not support conditional imports/exports
*
* // tsc foo.ts --module commonjs --moduleResolution node10
* import type {} from "mod" with { "resolution-mode": "import" };
* // Result: ESNext - conditional imports/exports always supported with "resolution-mode" attribute
* ```
*
* @param file The file the import or import-like reference is contained within
* @param usage The module reference string
* @param compilerOptions The compiler options for the program that owns the file. If the file belongs to a referenced project, the compiler options
* should be the options of the referenced project, not the referencing project.
* @returns The final resolution mode of the import
*/
export function getModeForUsageLocation(file: SourceFile, usage: StringLiteralLike, compilerOptions: CompilerOptions): ResolutionMode {
return getModeForUsageLocationWorker(file, usage, compilerOptions);
}
function getModeForUsageLocationWorker(file: Pick<SourceFile, "fileName" | "impliedNodeFormat" | "packageJsonScope">, usage: StringLiteralLike, compilerOptions?: CompilerOptions) {
if (isImportDeclaration(usage.parent) || isExportDeclaration(usage.parent) || isJSDocImportTag(usage.parent)) {
const isTypeOnly = isExclusivelyTypeOnlyImportOrExport(usage.parent);
if (isTypeOnly) {
const override = getResolutionModeOverride(usage.parent.attributes);
if (override) {
return override;
}
}
}
if (usage.parent.parent && isImportTypeNode(usage.parent.parent)) {
const override = getResolutionModeOverride(usage.parent.parent.attributes);
if (override) {
return override;
}
}
if (compilerOptions && importSyntaxAffectsModuleResolution(compilerOptions)) {
return getEmitSyntaxForUsageLocationWorker(file, usage, compilerOptions);
}
}
function getEmitSyntaxForUsageLocationWorker(file: Pick<SourceFile, "fileName" | "impliedNodeFormat" | "packageJsonScope">, usage: StringLiteralLike, compilerOptions?: CompilerOptions): ResolutionMode {
if (!compilerOptions) {
// This should always be provided, but we try to fail somewhat
// gracefully to allow projects like ts-node time to update.
return undefined;
}
const exprParentParent = walkUpParenthesizedExpressions(usage.parent)?.parent;
if (exprParentParent && isImportEqualsDeclaration(exprParentParent) || isRequireCall(usage.parent, /*requireStringLiteralLikeArgument*/ false)) {
return ModuleKind.CommonJS;
}
if (isImportCall(walkUpParenthesizedExpressions(usage.parent))) {
return shouldTransformImportCallWorker(file, compilerOptions) ? ModuleKind.CommonJS : ModuleKind.ESNext;
}
// If we're in --module preserve on an input file, we know that an import
// is an import. But if this is a declaration file, we'd prefer to use the
// impliedNodeFormat. Since we want things to be consistent between the two,
// we need to issue errors when the user writes ESM syntax in a definitely-CJS
// file, until/unless declaration emit can indicate a true ESM import. On the
// other hand, writing CJS syntax in a definitely-ESM file is fine, since declaration
// emit preserves the CJS syntax.
const fileEmitMode = getEmitModuleFormatOfFileWorker(file, compilerOptions);
return fileEmitMode === ModuleKind.CommonJS ? ModuleKind.CommonJS :
emitModuleKindIsNonNodeESM(fileEmitMode) || fileEmitMode === ModuleKind.Preserve ? ModuleKind.ESNext :
undefined;
}
/** @internal */
export function getResolutionModeOverride(node: ImportAttributes | undefined, grammarErrorOnNode?: (node: Node, diagnostic: DiagnosticMessage) => void): ResolutionMode | undefined {
if (!node) return undefined;
if (length(node.elements) !== 1) {
grammarErrorOnNode?.(
node,
node.token === SyntaxKind.WithKeyword
? Diagnostics.Type_import_attributes_should_have_exactly_one_key_resolution_mode_with_value_import_or_require
: Diagnostics.Type_import_assertions_should_have_exactly_one_key_resolution_mode_with_value_import_or_require,
);
return undefined;
}
const elem = node.elements[0];
if (!isStringLiteralLike(elem.name)) return undefined;
if (elem.name.text !== "resolution-mode") {
grammarErrorOnNode?.(
elem.name,
node.token === SyntaxKind.WithKeyword
? Diagnostics.resolution_mode_is_the_only_valid_key_for_type_import_attributes