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Copy pathprogram.ts
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Copy pathprogram.ts
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executable file
·2375 lines (2075 loc) · 127 KB
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/// <reference path="sys.ts" />
/// <reference path="emitter.ts" />
/// <reference path="core.ts" />
/// <reference path="builder.ts" />
namespace ts {
const ignoreDiagnosticCommentRegEx = /(^\s*$)|(^\s*\/\/\/?\s*(@ts-ignore)?)/;
export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName = "tsconfig.json"): string {
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: string[], currentDirectory: string, getCanonicalFileName: GetCanonicalFileName): string {
let commonPathComponents: string[];
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 getNormalizedPathFromPathComponents(commonPathComponents);
}
interface OutputFingerprint {
hash: string;
byteOrderMark: boolean;
mtime: Date;
}
export function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost {
const existingDirectories = createMap<boolean>();
function getCanonicalFileName(fileName: string): string {
// if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
// otherwise use toLowerCase as a canonical form.
return sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
}
function getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile {
let text: string;
try {
performance.mark("beforeIORead");
text = sys.readFile(fileName, options.charset);
performance.mark("afterIORead");
performance.measure("I/O Read", "beforeIORead", "afterIORead");
}
catch (e) {
if (onError) {
onError(e.message);
}
text = "";
}
return text !== undefined ? createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
}
function directoryExists(directoryPath: string): boolean {
if (existingDirectories.has(directoryPath)) {
return true;
}
if (sys.directoryExists(directoryPath)) {
existingDirectories.set(directoryPath, true);
return true;
}
return false;
}
function ensureDirectoriesExist(directoryPath: string) {
if (directoryPath.length > getRootLength(directoryPath) && !directoryExists(directoryPath)) {
const parentDirectory = getDirectoryPath(directoryPath);
ensureDirectoriesExist(parentDirectory);
sys.createDirectory(directoryPath);
}
}
let outputFingerprints: Map<OutputFingerprint>;
function writeFileIfUpdated(fileName: string, data: string, writeByteOrderMark: boolean): void {
if (!outputFingerprints) {
outputFingerprints = createMap<OutputFingerprint>();
}
const hash = sys.createHash(data);
const mtimeBefore = sys.getModifiedTime(fileName);
if (mtimeBefore) {
const fingerprint = outputFingerprints.get(fileName);
// If output has not been changed, and the file has no external modification
if (fingerprint &&
fingerprint.byteOrderMark === writeByteOrderMark &&
fingerprint.hash === hash &&
fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
return;
}
}
sys.writeFile(fileName, data, writeByteOrderMark);
const mtimeAfter = sys.getModifiedTime(fileName);
outputFingerprints.set(fileName, {
hash,
byteOrderMark: writeByteOrderMark,
mtime: mtimeAfter
});
}
function writeFile(fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void) {
try {
performance.mark("beforeIOWrite");
ensureDirectoriesExist(getDirectoryPath(normalizePath(fileName)));
if (isWatchSet(options) && sys.createHash && sys.getModifiedTime) {
writeFileIfUpdated(fileName, data, writeByteOrderMark);
}
else {
sys.writeFile(fileName, data, writeByteOrderMark);
}
performance.mark("afterIOWrite");
performance.measure("I/O Write", "beforeIOWrite", "afterIOWrite");
}
catch (e) {
if (onError) {
onError(e.message);
}
}
}
function getDefaultLibLocation(): string {
return getDirectoryPath(normalizePath(sys.getExecutingFilePath()));
}
const newLine = getNewLineCharacter(options);
const realpath = sys.realpath && ((path: string) => sys.realpath(path));
return {
getSourceFile,
getDefaultLibLocation,
getDefaultLibFileName: options => combinePaths(getDefaultLibLocation(), getDefaultLibFileName(options)),
writeFile,
getCurrentDirectory: memoize(() => sys.getCurrentDirectory()),
useCaseSensitiveFileNames: () => sys.useCaseSensitiveFileNames,
getCanonicalFileName,
getNewLine: () => newLine,
fileExists: fileName => sys.fileExists(fileName),
readFile: fileName => sys.readFile(fileName),
trace: (s: string) => sys.write(s + newLine),
directoryExists: directoryName => sys.directoryExists(directoryName),
getEnvironmentVariable: name => sys.getEnvironmentVariable ? sys.getEnvironmentVariable(name) : "",
getDirectories: (path: string) => sys.getDirectories(path),
realpath
};
}
export function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[] {
const diagnostics = [
...program.getOptionsDiagnostics(cancellationToken),
...program.getSyntacticDiagnostics(sourceFile, cancellationToken),
...program.getGlobalDiagnostics(cancellationToken),
...program.getSemanticDiagnostics(sourceFile, cancellationToken)
];
if (program.getCompilerOptions().declaration) {
addRange(diagnostics, program.getDeclarationDiagnostics(sourceFile, cancellationToken));
}
return sortAndDeduplicateDiagnostics(diagnostics);
}
export interface FormatDiagnosticsHost {
getCurrentDirectory(): string;
getCanonicalFileName(fileName: string): string;
getNewLine(): string;
}
export function formatDiagnostics(diagnostics: ReadonlyArray<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 category = DiagnosticCategory[diagnostic.category].toLowerCase();
const errorMessage = `${category} TS${diagnostic.code}: ${flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine())}${host.getNewLine()}`;
if (diagnostic.file) {
const { line, character } = getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
const fileName = diagnostic.file.fileName;
const relativeFileName = convertToRelativePath(fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName));
return `${relativeFileName}(${line + 1},${character + 1}): ` + errorMessage;
}
return errorMessage;
}
const redForegroundEscapeSequence = "\u001b[91m";
const yellowForegroundEscapeSequence = "\u001b[93m";
const blueForegroundEscapeSequence = "\u001b[93m";
const gutterStyleSequence = "\u001b[30;47m";
const gutterSeparator = " ";
const resetEscapeSequence = "\u001b[0m";
const ellipsis = "...";
function getCategoryFormat(category: DiagnosticCategory): string {
switch (category) {
case DiagnosticCategory.Warning: return yellowForegroundEscapeSequence;
case DiagnosticCategory.Error: return redForegroundEscapeSequence;
case DiagnosticCategory.Message: return blueForegroundEscapeSequence;
}
}
function formatAndReset(text: string, formatStyle: string) {
return formatStyle + text + resetEscapeSequence;
}
function padLeft(s: string, length: number) {
while (s.length < length) {
s = " " + s;
}
return s;
}
export function formatDiagnosticsWithColorAndContext(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string {
let output = "";
for (const diagnostic of diagnostics) {
let context = "";
if (diagnostic.file) {
const { start, length, file } = diagnostic;
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 relativeFileName = host ? convertToRelativePath(file.fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName)) : file.fileName;
const hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
let gutterWidth = (lastLine + 1 + "").length;
if (hasMoreThanFiveLines) {
gutterWidth = Math.max(ellipsis.length, gutterWidth);
}
context += host.getNewLine();
for (let i = firstLine; i <= lastLine; i++) {
// 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 += formatAndReset(padLeft(ellipsis, 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.replace(/\s+$/g, ""); // trim from end
lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
// Output the gutter and the actual contents of the line.
context += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
context += lineContent + host.getNewLine();
// Output the gutter and the error span for the line using tildes.
context += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
context += redForegroundEscapeSequence;
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;
}
output += host.getNewLine();
output += `${ relativeFileName }(${ firstLine + 1 },${ firstLineChar + 1 }): `;
}
const categoryColor = getCategoryFormat(diagnostic.category);
const category = DiagnosticCategory[diagnostic.category].toLowerCase();
output += `${ formatAndReset(category, categoryColor) } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine()) }`;
if (diagnostic.file) {
output += host.getNewLine();
output += context;
}
output += host.getNewLine();
}
return output;
}
export function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string {
if (isString(messageText)) {
return messageText;
}
else {
let diagnosticChain = messageText;
let result = "";
let indent = 0;
while (diagnosticChain) {
if (indent) {
result += newLine;
for (let i = 0; i < indent; i++) {
result += " ";
}
}
result += diagnosticChain.messageText;
indent++;
diagnosticChain = diagnosticChain.next;
}
return result;
}
}
function loadWithLocalCache<T>(names: string[], containingFile: string, loader: (name: string, containingFile: string) => T): T[] {
if (names.length === 0) {
return [];
}
const resolutions: T[] = [];
const cache = createMap<T>();
for (const name of names) {
let result: T;
if (cache.has(name)) {
result = cache.get(name);
}
else {
cache.set(name, result = loader(name, containingFile));
}
resolutions.push(result);
}
return resolutions;
}
interface DiagnosticCache {
perFile?: Map<Diagnostic[]>;
allDiagnostics?: Diagnostic[];
}
/**
* Determines if program structure is upto date or needs to be recreated
*/
/* @internal */
export function isProgramUptoDate(
program: Program | undefined,
rootFileNames: string[],
newOptions: CompilerOptions,
getSourceVersion: (path: Path) => string,
fileExists: (fileName: string) => boolean,
hasInvalidatedResolution: HasInvalidatedResolution,
hasChangedAutomaticTypeDirectiveNames: boolean,
): boolean {
// If we haven't create a program yet or has changed automatic type directives, then it is not up-to-date
if (!program || hasChangedAutomaticTypeDirectiveNames) {
return false;
}
// If number of files in the program do not match, it is not up-to-date
if (program.getRootFileNames().length !== rootFileNames.length) {
return false;
}
// If any file is not up-to-date, then the whole program is not up-to-date
if (program.getSourceFiles().some(sourceFileNotUptoDate)) {
return false;
}
// If any of the missing file paths are now created
if (program.getMissingFilePaths().some(fileExists)) {
return false;
}
const currentOptions = program.getCompilerOptions();
// If the compilation settings do no match, then the program is not up-to-date
if (!compareDataObjects(currentOptions, newOptions)) {
return false;
}
// If everything matches but the text of config file is changed,
// error locations can change for program options, so update the program
if (currentOptions.configFile && newOptions.configFile) {
return currentOptions.configFile.text === newOptions.configFile.text;
}
return true;
function sourceFileNotUptoDate(sourceFile: SourceFile): boolean {
return sourceFile.version !== getSourceVersion(sourceFile.path) ||
hasInvalidatedResolution(sourceFile.path);
}
}
/**
* Determined if source file needs to be re-created even if its text hasnt changed
*/
function shouldProgramCreateNewSourceFiles(program: Program, newOptions: CompilerOptions) {
// If any of these options change, we cant reuse old source file even if version match
// The change in options like these could result in change in syntax tree change
const oldOptions = program && program.getCompilerOptions();
return oldOptions && (
oldOptions.target !== newOptions.target ||
oldOptions.module !== newOptions.module ||
oldOptions.moduleResolution !== newOptions.moduleResolution ||
oldOptions.noResolve !== newOptions.noResolve ||
oldOptions.jsx !== newOptions.jsx ||
oldOptions.allowJs !== newOptions.allowJs ||
oldOptions.disableSizeLimit !== newOptions.disableSizeLimit ||
oldOptions.baseUrl !== newOptions.baseUrl ||
!equalOwnProperties(oldOptions.paths, newOptions.paths)
);
}
/**
* Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
* that represent a compilation unit.
*
* Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
* triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
*
* @param rootNames - A set of root files.
* @param options - The compiler options which should be used.
* @param host - The host interacts with the underlying file system.
* @param oldProgram - Reuses an old program structure.
* @returns A 'Program' object.
*/
export function createProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program {
let program: Program;
let files: SourceFile[] = [];
let commonSourceDirectory: string;
let diagnosticsProducingTypeChecker: TypeChecker;
let noDiagnosticsTypeChecker: TypeChecker;
let classifiableNames: UnderscoreEscapedMap<true>;
let modifiedFilePaths: Path[] | undefined;
const cachedSemanticDiagnosticsForFile: DiagnosticCache = {};
const cachedDeclarationDiagnosticsForFile: DiagnosticCache = {};
let resolvedTypeReferenceDirectives = createMap<ResolvedTypeReferenceDirective>();
let fileProcessingDiagnostics = createDiagnosticCollection();
// The below settings are to track if a .js file should be add to the program if loaded via searching under node_modules.
// This works as imported modules are discovered recursively in a depth first manner, specifically:
// - For each root file, findSourceFile is called.
// - This calls processImportedModules for each module imported in the source file.
// - This calls resolveModuleNames, and then calls findSourceFile for each resolved module.
// As all these operations happen - and are nested - within the createProgram call, they close over the below variables.
// The current resolution depth is tracked by incrementing/decrementing as the depth first search progresses.
const maxNodeModuleJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
let currentNodeModulesDepth = 0;
// If a module has some of its imports skipped due to being at the depth limit under node_modules, then track
// this, as it may be imported at a shallower depth later, and then it will need its skipped imports processed.
const modulesWithElidedImports = createMap<boolean>();
// Track source files that are source files found by searching under node_modules, as these shouldn't be compiled.
const sourceFilesFoundSearchingNodeModules = createMap<boolean>();
performance.mark("beforeProgram");
host = host || createCompilerHost(options);
let skipDefaultLib = options.noLib;
const getDefaultLibraryFileName = memoize(() => host.getDefaultLibFileName(options));
const defaultLibraryPath = host.getDefaultLibLocation ? host.getDefaultLibLocation() : getDirectoryPath(getDefaultLibraryFileName());
const programDiagnostics = createDiagnosticCollection();
const currentDirectory = host.getCurrentDirectory();
const supportedExtensions = getSupportedExtensions(options);
// Map storing if there is emit blocking diagnostics for given input
const hasEmitBlockingDiagnostics = createMap<boolean>();
let _compilerOptionsObjectLiteralSyntax: ObjectLiteralExpression;
let moduleResolutionCache: ModuleResolutionCache;
let resolveModuleNamesWorker: (moduleNames: string[], containingFile: string, reusedNames?: string[]) => ResolvedModuleFull[];
const hasInvalidatedResolution = host.hasInvalidatedResolution || returnFalse;
if (host.resolveModuleNames) {
resolveModuleNamesWorker = (moduleNames, containingFile, reusedNames) => host.resolveModuleNames(checkAllDefined(moduleNames), containingFile, reusedNames).map(resolved => {
// An older host may have omitted extension, in which case we should infer it from the file extension of resolvedFileName.
if (!resolved || (resolved as ResolvedModuleFull).extension !== undefined) {
return resolved as ResolvedModuleFull;
}
const withExtension = clone(resolved) as ResolvedModuleFull;
withExtension.extension = extensionFromPath(resolved.resolvedFileName);
return withExtension;
});
}
else {
moduleResolutionCache = createModuleResolutionCache(currentDirectory, x => host.getCanonicalFileName(x));
const loader = (moduleName: string, containingFile: string) => resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule;
resolveModuleNamesWorker = (moduleNames, containingFile) => loadWithLocalCache(checkAllDefined(moduleNames), containingFile, loader);
}
let resolveTypeReferenceDirectiveNamesWorker: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
if (host.resolveTypeReferenceDirectives) {
resolveTypeReferenceDirectiveNamesWorker = (typeDirectiveNames, containingFile) => host.resolveTypeReferenceDirectives(checkAllDefined(typeDirectiveNames), containingFile);
}
else {
const loader = (typesRef: string, containingFile: string) => resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective;
resolveTypeReferenceDirectiveNamesWorker = (typeReferenceDirectiveNames, containingFile) => loadWithLocalCache(checkAllDefined(typeReferenceDirectiveNames), containingFile, loader);
}
// Map from a stringified PackageId to the source file with that id.
// Only one source file may have a given packageId. Others become redirects (see createRedirectSourceFile).
// `packageIdToSourceFile` is only used while building the program, while `sourceFileToPackageName` and `isSourceFileTargetOfRedirect` are kept around.
const packageIdToSourceFile = createMap<SourceFile>();
// Maps from a SourceFile's `.path` to the name of the package it was imported with.
let sourceFileToPackageName = createMap<string>();
// See `sourceFileIsRedirectedTo`.
let redirectTargetsSet = createMap<true>();
const filesByName = createMap<SourceFile | undefined>();
let missingFilePaths: ReadonlyArray<Path>;
// stores 'filename -> file association' ignoring case
// used to track cases when two file names differ only in casing
const filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? createMap<SourceFile>() : undefined;
const shouldCreateNewSourceFile = shouldProgramCreateNewSourceFiles(oldProgram, options);
const structuralIsReused = tryReuseStructureFromOldProgram();
if (structuralIsReused !== StructureIsReused.Completely) {
forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
// load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
const typeReferences: string[] = getAutomaticTypeDirectiveNames(options, host);
if (typeReferences.length) {
// This containingFilename needs to match with the one used in managed-side
const containingDirectory = options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory();
const containingFilename = combinePaths(containingDirectory, "__inferred type names__.ts");
const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
for (let i = 0; i < typeReferences.length; i++) {
processTypeReferenceDirective(typeReferences[i], resolutions[i]);
}
}
// Do not process the default library if:
// - The '--noLib' flag is used.
// - A 'no-default-lib' reference comment is encountered in
// processing the root files.
if (!skipDefaultLib) {
// If '--lib' is not specified, include default library file according to '--target'
// otherwise, using options specified in '--lib' instead of '--target' default library file
if (!options.lib) {
processRootFile(getDefaultLibraryFileName(), /*isDefaultLib*/ true);
}
else {
forEach(options.lib, libFileName => {
processRootFile(combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true);
});
}
}
missingFilePaths = arrayFrom(filesByName.keys(), p => <Path>p).filter(p => !filesByName.get(p));
}
Debug.assert(!!missingFilePaths);
// unconditionally set moduleResolutionCache to undefined to avoid unnecessary leaks
moduleResolutionCache = undefined;
// Release any files we have acquired in the old program but are
// not part of the new program.
if (oldProgram && host.onReleaseOldSourceFile) {
const oldSourceFiles = oldProgram.getSourceFiles();
for (const oldSourceFile of oldSourceFiles) {
if (!getSourceFile(oldSourceFile.path) || shouldCreateNewSourceFile) {
host.onReleaseOldSourceFile(oldSourceFile, oldProgram.getCompilerOptions());
}
}
}
// unconditionally set oldProgram to undefined to prevent it from being captured in closure
oldProgram = undefined;
program = {
getRootFileNames: () => rootNames,
getSourceFile,
getSourceFileByPath,
getSourceFiles: () => files,
getMissingFilePaths: () => missingFilePaths,
getCompilerOptions: () => options,
getSyntacticDiagnostics,
getOptionsDiagnostics,
getGlobalDiagnostics,
getSemanticDiagnostics,
getDeclarationDiagnostics,
getTypeChecker,
getClassifiableNames,
getDiagnosticsProducingTypeChecker,
getCommonSourceDirectory,
emit,
getCurrentDirectory: () => currentDirectory,
getNodeCount: () => getDiagnosticsProducingTypeChecker().getNodeCount(),
getIdentifierCount: () => getDiagnosticsProducingTypeChecker().getIdentifierCount(),
getSymbolCount: () => getDiagnosticsProducingTypeChecker().getSymbolCount(),
getTypeCount: () => getDiagnosticsProducingTypeChecker().getTypeCount(),
getFileProcessingDiagnostics: () => fileProcessingDiagnostics,
getResolvedTypeReferenceDirectives: () => resolvedTypeReferenceDirectives,
isSourceFileFromExternalLibrary,
isSourceFileDefaultLibrary,
dropDiagnosticsProducingTypeChecker,
getSourceFileFromReference,
sourceFileToPackageName,
redirectTargetsSet
};
verifyCompilerOptions();
performance.mark("afterProgram");
performance.measure("Program", "beforeProgram", "afterProgram");
return program;
function toPath(fileName: string): Path {
return ts.toPath(fileName, currentDirectory, getCanonicalFileName);
}
function getCommonSourceDirectory() {
if (commonSourceDirectory === undefined) {
const emittedFiles = filter(files, file => sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary));
if (options.rootDir && checkSourceFilesBelongToPath(emittedFiles, options.rootDir)) {
// If a rootDir is specified and is valid use it as the commonSourceDirectory
commonSourceDirectory = getNormalizedAbsolutePath(options.rootDir, currentDirectory);
}
else {
commonSourceDirectory = computeCommonSourceDirectory(emittedFiles);
}
if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== directorySeparator) {
// Make sure directory path ends with directory separator so this string can directly
// used to replace with "" to get the relative path of the source file and the relative path doesn't
// start with / making it rooted path
commonSourceDirectory += directorySeparator;
}
}
return commonSourceDirectory;
}
function getClassifiableNames() {
if (!classifiableNames) {
// Initialize a checker so that all our files are bound.
getTypeChecker();
classifiableNames = createUnderscoreEscapedMap<true>();
for (const sourceFile of files) {
copyEntries(sourceFile.classifiableNames, classifiableNames);
}
}
return classifiableNames;
}
interface OldProgramState {
program: Program | undefined;
file: SourceFile;
/** The collection of paths modified *since* the old program. */
modifiedFilePaths: Path[];
}
function resolveModuleNamesReusingOldState(moduleNames: string[], containingFile: string, file: SourceFile, oldProgramState: OldProgramState) {
if (structuralIsReused === StructureIsReused.Not && !file.ambientModuleNames.length) {
// If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
// the best we can do is fallback to the default logic.
return resolveModuleNamesWorker(moduleNames, containingFile);
}
const oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
if (oldSourceFile !== file && file.resolvedModules) {
// `file` was created for the new program.
//
// We only set `file.resolvedModules` via work from the current function,
// so it is defined iff we already called the current function on `file`.
// That call happened no later than the creation of the `file` object,
// which per above occured during the current program creation.
// Since we assume the filesystem does not change during program creation,
// it is safe to reuse resolutions from the earlier call.
const result: ResolvedModuleFull[] = [];
for (const moduleName of moduleNames) {
const resolvedModule = file.resolvedModules.get(moduleName);
result.push(resolvedModule);
}
return result;
}
// At this point, we know at least one of the following hold:
// - file has local declarations for ambient modules
// - old program state is available
// With this information, we can infer some module resolutions without performing resolution.
/** An ordered list of module names for which we cannot recover the resolution. */
let unknownModuleNames: string[];
/**
* The indexing of elements in this list matches that of `moduleNames`.
*
* Before combining results, result[i] is in one of the following states:
* * undefined: needs to be recomputed,
* * predictedToResolveToAmbientModuleMarker: known to be an ambient module.
* Needs to be reset to undefined before returning,
* * ResolvedModuleFull instance: can be reused.
*/
let result: ResolvedModuleFull[];
let reusedNames: string[];
/** A transient placeholder used to mark predicted resolution in the result list. */
const predictedToResolveToAmbientModuleMarker: ResolvedModuleFull = <any>{};
for (let i = 0; i < moduleNames.length; i++) {
const moduleName = moduleNames[i];
// If the source file is unchanged and doesnt have invalidated resolution, reuse the module resolutions
if (file === oldSourceFile && !hasInvalidatedResolution(oldSourceFile.path)) {
const oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
if (oldResolvedModule) {
if (isTraceEnabled(options, host)) {
trace(host, Diagnostics.Reusing_resolution_of_module_0_to_file_1_from_old_program, moduleName, containingFile);
}
(result || (result = new Array(moduleNames.length)))[i] = oldResolvedModule;
(reusedNames || (reusedNames = [])).push(moduleName);
continue;
}
}
// We know moduleName resolves to an ambient module provided that moduleName:
// - is in the list of ambient modules locally declared in the current source file.
// - resolved to an ambient module in the old program whose declaration is in an unmodified file
// (so the same module declaration will land in the new program)
let resolvesToAmbientModuleInNonModifiedFile = false;
if (contains(file.ambientModuleNames, moduleName)) {
resolvesToAmbientModuleInNonModifiedFile = true;
if (isTraceEnabled(options, host)) {
trace(host, Diagnostics.Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1, moduleName, containingFile);
}
}
else {
resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState);
}
if (resolvesToAmbientModuleInNonModifiedFile) {
(result || (result = new Array(moduleNames.length)))[i] = predictedToResolveToAmbientModuleMarker;
}
else {
// Resolution failed in the old program, or resolved to an ambient module for which we can't reuse the result.
(unknownModuleNames || (unknownModuleNames = [])).push(moduleName);
}
}
const resolutions = unknownModuleNames && unknownModuleNames.length
? resolveModuleNamesWorker(unknownModuleNames, containingFile, reusedNames)
: emptyArray;
// Combine results of resolutions and predicted results
if (!result) {
// There were no unresolved/ambient resolutions.
Debug.assert(resolutions.length === moduleNames.length);
return <ResolvedModuleFull[]>resolutions;
}
let j = 0;
for (let i = 0; i < result.length; i++) {
if (result[i]) {
// `result[i]` is either a `ResolvedModuleFull` or a marker.
// If it is the former, we can leave it as is.
if (result[i] === predictedToResolveToAmbientModuleMarker) {
result[i] = undefined;
}
}
else {
result[i] = resolutions[j];
j++;
}
}
Debug.assert(j === resolutions.length);
return result;
// If we change our policy of rechecking failed lookups on each program create,
// we should adjust the value returned here.
function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName: string, oldProgramState: OldProgramState): boolean {
const resolutionToFile = getResolvedModule(oldProgramState.file, moduleName);
if (resolutionToFile) {
// module used to be resolved to file - ignore it
return false;
}
const ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
if (!(ambientModule && ambientModule.declarations)) {
return false;
}
// at least one of declarations should come from non-modified source file
const firstUnmodifiedFile = forEach(ambientModule.declarations, d => {
const f = getSourceFileOfNode(d);
return !contains(oldProgramState.modifiedFilePaths, f.path) && f;
});
if (!firstUnmodifiedFile) {
return false;
}
if (isTraceEnabled(options, host)) {
trace(host, Diagnostics.Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified, moduleName, firstUnmodifiedFile.fileName);
}
return true;
}
}
function tryReuseStructureFromOldProgram(): StructureIsReused {
if (!oldProgram) {
return StructureIsReused.Not;
}
// check properties that can affect structure of the program or module resolution strategy
// if any of these properties has changed - structure cannot be reused
const oldOptions = oldProgram.getCompilerOptions();
if (changesAffectModuleResolution(oldOptions, options)) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
Debug.assert(!(oldProgram.structureIsReused & (StructureIsReused.Completely | StructureIsReused.SafeModules)));
// there is an old program, check if we can reuse its structure
const oldRootNames = oldProgram.getRootFileNames();
if (!arrayIsEqualTo(oldRootNames, rootNames)) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
if (!arrayIsEqualTo(options.types, oldOptions.types)) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
// check if program source files has changed in the way that can affect structure of the program
const newSourceFiles: SourceFile[] = [];
const filePaths: Path[] = [];
const modifiedSourceFiles: { oldFile: SourceFile, newFile: SourceFile }[] = [];
oldProgram.structureIsReused = StructureIsReused.Completely;
// If the missing file paths are now present, it can change the progam structure,
// and hence cant reuse the structure.
// This is same as how we dont reuse the structure if one of the file from old program is now missing
if (oldProgram.getMissingFilePaths().some(missingFilePath => host.fileExists(missingFilePath))) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
const oldSourceFiles = oldProgram.getSourceFiles();
const enum SeenPackageName { Exists, Modified }
const seenPackageNames = createMap<SeenPackageName>();
for (const oldSourceFile of oldSourceFiles) {
let newSourceFile = host.getSourceFileByPath
? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target, /*onError*/ undefined, shouldCreateNewSourceFile)
: host.getSourceFile(oldSourceFile.fileName, options.target, /*onError*/ undefined, shouldCreateNewSourceFile);
if (!newSourceFile) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
Debug.assert(!newSourceFile.redirectInfo, "Host should not return a redirect source file from `getSourceFile`");
let fileChanged: boolean;
if (oldSourceFile.redirectInfo) {
// We got `newSourceFile` by path, so it is actually for the unredirected file.
// This lets us know if the unredirected file has changed. If it has we should break the redirect.
if (newSourceFile !== oldSourceFile.redirectInfo.unredirected) {
// Underlying file has changed. Might not redirect anymore. Must rebuild program.
return oldProgram.structureIsReused = StructureIsReused.Not;
}
fileChanged = false;
newSourceFile = oldSourceFile; // Use the redirect.
}
else if (oldProgram.redirectTargetsSet.has(oldSourceFile.path)) {
// If a redirected-to source file changes, the redirect may be broken.
if (newSourceFile !== oldSourceFile) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
fileChanged = false;
}
else {
fileChanged = newSourceFile !== oldSourceFile;
}
newSourceFile.path = oldSourceFile.path;
filePaths.push(newSourceFile.path);
const packageName = oldProgram.sourceFileToPackageName.get(oldSourceFile.path);
if (packageName !== undefined) {
// If there are 2 different source files for the same package name and at least one of them changes,
// they might become redirects. So we must rebuild the program.
const prevKind = seenPackageNames.get(packageName);
const newKind = fileChanged ? SeenPackageName.Modified : SeenPackageName.Exists;
if ((prevKind !== undefined && newKind === SeenPackageName.Modified) || prevKind === SeenPackageName.Modified) {
return oldProgram.structureIsReused = StructureIsReused.Not;
}
seenPackageNames.set(packageName, newKind);
}
if (fileChanged) {
// The `newSourceFile` object was created for the new program.
if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
// value of no-default-lib has changed
// this will affect if default library is injected into the list of files
oldProgram.structureIsReused = StructureIsReused.SafeModules;
}
// check tripleslash references
if (!arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
// tripleslash references has changed
oldProgram.structureIsReused = StructureIsReused.SafeModules;
}
// check imports and module augmentations
collectExternalModuleReferences(newSourceFile);
if (!arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
// imports has changed
oldProgram.structureIsReused = StructureIsReused.SafeModules;
}
if (!arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
// moduleAugmentations has changed
oldProgram.structureIsReused = StructureIsReused.SafeModules;
}
if ((oldSourceFile.flags & NodeFlags.PossiblyContainsDynamicImport) !== (newSourceFile.flags & NodeFlags.PossiblyContainsDynamicImport)) {
// dynamicImport has changed
oldProgram.structureIsReused = StructureIsReused.SafeModules;
}
if (!arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
// 'types' references has changed
oldProgram.structureIsReused = StructureIsReused.SafeModules;
}
// tentatively approve the file
modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
}
else if (hasInvalidatedResolution(oldSourceFile.path)) {
// 'module/types' references could have changed
oldProgram.structureIsReused = StructureIsReused.SafeModules;
// add file to the modified list so that we will resolve it later
modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
}
// if file has passed all checks it should be safe to reuse it
newSourceFiles.push(newSourceFile);
}
if (oldProgram.structureIsReused !== StructureIsReused.Completely) {
return oldProgram.structureIsReused;
}
modifiedFilePaths = modifiedSourceFiles.map(f => f.newFile.path);
// try to verify results of module resolution
for (const { oldFile: oldSourceFile, newFile: newSourceFile } of modifiedSourceFiles) {
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