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session.ts
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3183 lines (2853 loc) · 167 KB
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namespace ts.server {
interface StackTraceError extends Error {
stack?: string;
}
export interface ServerCancellationToken extends HostCancellationToken {
setRequest(requestId: number): void;
resetRequest(requestId: number): void;
}
export const nullCancellationToken: ServerCancellationToken = {
isCancellationRequested: () => false,
setRequest: () => void 0,
resetRequest: () => void 0
};
function hrTimeToMilliseconds(time: number[]): number {
const seconds = time[0];
const nanoseconds = time[1];
return ((1e9 * seconds) + nanoseconds) / 1000000.0;
}
function isDeclarationFileInJSOnlyNonConfiguredProject(project: Project, file: NormalizedPath) {
// Checking for semantic diagnostics is an expensive process. We want to avoid it if we
// know for sure it is not needed.
// For instance, .d.ts files injected by ATA automatically do not produce any relevant
// errors to a JS- only project.
//
// Note that configured projects can set skipLibCheck (on by default in jsconfig.json) to
// disable checking for declaration files. We only need to verify for inferred projects (e.g.
// miscellaneous context in VS) and external projects(e.g.VS.csproj project) with only JS
// files.
//
// We still want to check .js files in a JS-only inferred or external project (e.g. if the
// file has '// @ts-check').
if ((isInferredProject(project) || isExternalProject(project)) &&
project.isJsOnlyProject()) {
const scriptInfo = project.getScriptInfoForNormalizedPath(file);
return scriptInfo && !scriptInfo.isJavaScript();
}
return false;
}
function dtsChangeCanAffectEmit(compilationSettings: CompilerOptions) {
return getEmitDeclarations(compilationSettings) || !!compilationSettings.emitDecoratorMetadata;
}
function formatDiag(fileName: NormalizedPath, project: Project, diag: Diagnostic): protocol.Diagnostic {
const scriptInfo = project.getScriptInfoForNormalizedPath(fileName)!; // TODO: GH#18217
return {
start: scriptInfo.positionToLineOffset(diag.start!),
end: scriptInfo.positionToLineOffset(diag.start! + diag.length!), // TODO: GH#18217
text: flattenDiagnosticMessageText(diag.messageText, "\n"),
code: diag.code,
category: diagnosticCategoryName(diag),
reportsUnnecessary: diag.reportsUnnecessary,
reportsDeprecated: diag.reportsDeprecated,
source: diag.source,
relatedInformation: map(diag.relatedInformation, formatRelatedInformation),
};
}
function formatRelatedInformation(info: DiagnosticRelatedInformation): protocol.DiagnosticRelatedInformation {
if (!info.file) {
return {
message: flattenDiagnosticMessageText(info.messageText, "\n"),
category: diagnosticCategoryName(info),
code: info.code
};
}
return {
span: {
start: convertToLocation(getLineAndCharacterOfPosition(info.file, info.start!)),
end: convertToLocation(getLineAndCharacterOfPosition(info.file, info.start! + info.length!)), // TODO: GH#18217
file: info.file.fileName
},
message: flattenDiagnosticMessageText(info.messageText, "\n"),
category: diagnosticCategoryName(info),
code: info.code
};
}
function convertToLocation(lineAndCharacter: LineAndCharacter): protocol.Location {
return { line: lineAndCharacter.line + 1, offset: lineAndCharacter.character + 1 };
}
function formatDiagnosticToProtocol(diag: Diagnostic, includeFileName: true): protocol.DiagnosticWithFileName;
function formatDiagnosticToProtocol(diag: Diagnostic, includeFileName: false): protocol.Diagnostic;
function formatDiagnosticToProtocol(diag: Diagnostic, includeFileName: boolean): protocol.Diagnostic | protocol.DiagnosticWithFileName {
const start = (diag.file && convertToLocation(getLineAndCharacterOfPosition(diag.file, diag.start!)))!; // TODO: GH#18217
const end = (diag.file && convertToLocation(getLineAndCharacterOfPosition(diag.file, diag.start! + diag.length!)))!; // TODO: GH#18217
const text = flattenDiagnosticMessageText(diag.messageText, "\n");
const { code, source } = diag;
const category = diagnosticCategoryName(diag);
const common = {
start,
end,
text,
code,
category,
reportsUnnecessary: diag.reportsUnnecessary,
reportsDeprecated: diag.reportsDeprecated,
source,
relatedInformation: map(diag.relatedInformation, formatRelatedInformation),
};
return includeFileName
? { ...common, fileName: diag.file && diag.file.fileName }
: common;
}
export interface PendingErrorCheck {
fileName: NormalizedPath;
project: Project;
}
function allEditsBeforePos(edits: readonly TextChange[], pos: number): boolean {
return edits.every(edit => textSpanEnd(edit.span) < pos);
}
// CommandNames used to be exposed before TS 2.4 as a namespace
// In TS 2.4 we switched to an enum, keep this for backward compatibility
// The var assignment ensures that even though CommandTypes are a const enum
// we want to ensure the value is maintained in the out since the file is
// built using --preseveConstEnum.
export type CommandNames = protocol.CommandTypes;
export const CommandNames = (<any>protocol).CommandTypes;
export function formatMessage<T extends protocol.Message>(msg: T, logger: Logger, byteLength: (s: string, encoding: string) => number, newLine: string): string {
const verboseLogging = logger.hasLevel(LogLevel.verbose);
const json = JSON.stringify(msg);
if (verboseLogging) {
logger.info(`${msg.type}:${indent(json)}`);
}
const len = byteLength(json, "utf8");
return `Content-Length: ${1 + len}\r\n\r\n${json}${newLine}`;
}
/**
* Allows to schedule next step in multistep operation
*/
interface NextStep {
immediate(action: () => void): void;
delay(ms: number, action: () => void): void;
}
/**
* External capabilities used by multistep operation
*/
interface MultistepOperationHost {
getCurrentRequestId(): number;
sendRequestCompletedEvent(requestId: number): void;
getServerHost(): ServerHost;
isCancellationRequested(): boolean;
executeWithRequestId(requestId: number, action: () => void): void;
logError(error: Error, message: string): void;
}
/**
* Represents operation that can schedule its next step to be executed later.
* Scheduling is done via instance of NextStep. If on current step subsequent step was not scheduled - operation is assumed to be completed.
*/
class MultistepOperation implements NextStep {
private requestId: number | undefined;
private timerHandle: any;
private immediateId: number | undefined;
constructor(private readonly operationHost: MultistepOperationHost) { }
public startNew(action: (next: NextStep) => void) {
this.complete();
this.requestId = this.operationHost.getCurrentRequestId();
this.executeAction(action);
}
private complete() {
if (this.requestId !== undefined) {
this.operationHost.sendRequestCompletedEvent(this.requestId);
this.requestId = undefined;
}
this.setTimerHandle(undefined);
this.setImmediateId(undefined);
}
public immediate(action: () => void) {
const requestId = this.requestId!;
Debug.assert(requestId === this.operationHost.getCurrentRequestId(), "immediate: incorrect request id");
this.setImmediateId(this.operationHost.getServerHost().setImmediate(() => {
this.immediateId = undefined;
this.operationHost.executeWithRequestId(requestId, () => this.executeAction(action));
}));
}
public delay(ms: number, action: () => void) {
const requestId = this.requestId!;
Debug.assert(requestId === this.operationHost.getCurrentRequestId(), "delay: incorrect request id");
this.setTimerHandle(this.operationHost.getServerHost().setTimeout(() => {
this.timerHandle = undefined;
this.operationHost.executeWithRequestId(requestId, () => this.executeAction(action));
}, ms));
}
private executeAction(action: (next: NextStep) => void) {
let stop = false;
try {
if (this.operationHost.isCancellationRequested()) {
stop = true;
tracing?.instant(tracing.Phase.Session, "stepCanceled", { seq: this.requestId, early: true });
}
else {
tracing?.push(tracing.Phase.Session, "stepAction", { seq: this.requestId });
action(this);
tracing?.pop();
}
}
catch (e) {
// Cancellation or an error may have left incomplete events on the tracing stack.
tracing?.popAll();
stop = true;
// ignore cancellation request
if (e instanceof OperationCanceledException) {
tracing?.instant(tracing.Phase.Session, "stepCanceled", { seq: this.requestId });
}
else {
tracing?.instant(tracing.Phase.Session, "stepError", { seq: this.requestId, message: (<Error>e).message });
this.operationHost.logError(e, `delayed processing of request ${this.requestId}`);
}
}
if (stop || !this.hasPendingWork()) {
this.complete();
}
}
private setTimerHandle(timerHandle: any) {
if (this.timerHandle !== undefined) {
this.operationHost.getServerHost().clearTimeout(this.timerHandle);
}
this.timerHandle = timerHandle;
}
private setImmediateId(immediateId: number | undefined) {
if (this.immediateId !== undefined) {
this.operationHost.getServerHost().clearImmediate(this.immediateId);
}
this.immediateId = immediateId;
}
private hasPendingWork() {
return !!this.timerHandle || !!this.immediateId;
}
}
export type Event = <T extends object>(body: T, eventName: string) => void;
export interface EventSender {
event: Event;
}
/** @internal */
export function toEvent(eventName: string, body: object): protocol.Event {
return {
seq: 0,
type: "event",
event: eventName,
body
};
}
type Projects = readonly Project[] | {
readonly projects: readonly Project[];
readonly symLinkedProjects: MultiMap<Path, Project>;
};
/**
* This helper function processes a list of projects and return the concatenated, sortd and deduplicated output of processing each project.
*/
function combineProjectOutput<T, U>(
defaultValue: T,
getValue: (path: Path) => T,
projects: Projects,
action: (project: Project, value: T) => readonly U[] | U | undefined,
): U[] {
const outputs = flatMapToMutable(isArray(projects) ? projects : projects.projects, project => action(project, defaultValue));
if (!isArray(projects) && projects.symLinkedProjects) {
projects.symLinkedProjects.forEach((projects, path) => {
const value = getValue(path);
outputs.push(...flatMap(projects, project => action(project, value)));
});
}
return deduplicate(outputs, equateValues);
}
type CombineOutputResult<T> = { project: Project; result: readonly T[]; }[];
function combineOutputResultContains<T>(outputs: CombineOutputResult<T>, output: T, areEqual: (a: T, b: T) => boolean) {
return outputs.some(({ result }) => contains(result, output, areEqual));
}
function addToCombineOutputResult<T>(outputs: CombineOutputResult<T>, project: Project, result: readonly T[]) {
if (result.length) outputs.push({ project, result });
}
function combineProjectOutputFromEveryProject<T>(projectService: ProjectService, action: (project: Project) => readonly T[], areEqual: (a: T, b: T) => boolean): CombineOutputResult<T> {
const outputs: CombineOutputResult<T> = [];
projectService.loadAncestorProjectTree();
projectService.forEachEnabledProject(project => {
const theseOutputs = action(project);
addToCombineOutputResult(outputs, project, filter(theseOutputs, output => !combineOutputResultContains(outputs, output, areEqual)));
});
return outputs;
}
function flattenCombineOutputResult<T>(outputs: CombineOutputResult<T>): readonly T[] {
return flatMap(outputs, ({ result }) => result);
}
function combineProjectOutputWhileOpeningReferencedProjects<T>(
projects: Projects,
defaultProject: Project,
action: (project: Project) => readonly T[],
getLocation: (t: T) => DocumentPosition,
resultsEqual: (a: T, b: T) => boolean,
): CombineOutputResult<T> {
const outputs: CombineOutputResult<T> = [];
combineProjectOutputWorker(
projects,
defaultProject,
/*initialLocation*/ undefined,
(project, _, tryAddToTodo) => {
const theseOutputs = action(project);
addToCombineOutputResult(outputs, project, filter(theseOutputs, output => !combineOutputResultContains(outputs, output, resultsEqual) && !tryAddToTodo(project, getLocation(output))));
},
);
return outputs;
}
function combineProjectOutputForRenameLocations(
projects: Projects,
defaultProject: Project,
initialLocation: DocumentPosition,
findInStrings: boolean,
findInComments: boolean,
hostPreferences: UserPreferences
): readonly RenameLocation[] {
const outputs: RenameLocation[] = [];
combineProjectOutputWorker(
projects,
defaultProject,
initialLocation,
(project, location, tryAddToTodo) => {
for (const output of project.getLanguageService().findRenameLocations(location.fileName, location.pos, findInStrings, findInComments, hostPreferences.providePrefixAndSuffixTextForRename) || emptyArray) {
if (!contains(outputs, output, documentSpansEqual) && !tryAddToTodo(project, documentSpanLocation(output))) {
outputs.push(output);
}
}
},
);
return outputs;
}
function getDefinitionLocation(defaultProject: Project, initialLocation: DocumentPosition): DocumentPosition | undefined {
const infos = defaultProject.getLanguageService().getDefinitionAtPosition(initialLocation.fileName, initialLocation.pos);
const info = infos && firstOrUndefined(infos);
return info && !info.isLocal ? { fileName: info.fileName, pos: info.textSpan.start } : undefined;
}
function combineProjectOutputForReferences(
projects: Projects,
defaultProject: Project,
initialLocation: DocumentPosition
): readonly ReferencedSymbol[] {
const outputs: ReferencedSymbol[] = [];
combineProjectOutputWorker(
projects,
defaultProject,
initialLocation,
(project, location, getMappedLocation) => {
for (const outputReferencedSymbol of project.getLanguageService().findReferences(location.fileName, location.pos) || emptyArray) {
const mappedDefinitionFile = getMappedLocation(project, documentSpanLocation(outputReferencedSymbol.definition));
const definition: ReferencedSymbolDefinitionInfo = mappedDefinitionFile === undefined ?
outputReferencedSymbol.definition :
{
...outputReferencedSymbol.definition,
textSpan: createTextSpan(mappedDefinitionFile.pos, outputReferencedSymbol.definition.textSpan.length),
fileName: mappedDefinitionFile.fileName,
contextSpan: getMappedContextSpan(outputReferencedSymbol.definition, project)
};
let symbolToAddTo = find(outputs, o => documentSpansEqual(o.definition, definition));
if (!symbolToAddTo) {
symbolToAddTo = { definition, references: [] };
outputs.push(symbolToAddTo);
}
for (const ref of outputReferencedSymbol.references) {
// If it's in a mapped file, that is added to the todo list by `getMappedLocation`.
if (!contains(symbolToAddTo.references, ref, documentSpansEqual) && !getMappedLocation(project, documentSpanLocation(ref))) {
symbolToAddTo.references.push(ref);
}
}
}
},
);
return outputs.filter(o => o.references.length !== 0);
}
function combineProjectOutputForFileReferences(
projects: Projects,
defaultProject: Project,
fileName: string
): readonly ReferenceEntry[] {
const outputs: ReferenceEntry[] = [];
combineProjectOutputWorker(
projects,
defaultProject,
/*initialLocation*/ undefined,
project => {
for (const referenceEntry of project.getLanguageService().getFileReferences(fileName) || emptyArray) {
if (!contains(outputs, referenceEntry, documentSpansEqual)) {
outputs.push(referenceEntry);
}
}
},
);
return outputs;
}
interface ProjectAndLocation<TLocation extends DocumentPosition | undefined> {
readonly project: Project;
readonly location: TLocation;
}
function forEachProjectInProjects(projects: Projects, path: string | undefined, cb: (project: Project, path: string | undefined) => void): void {
for (const project of isArray(projects) ? projects : projects.projects) {
cb(project, path);
}
if (!isArray(projects) && projects.symLinkedProjects) {
projects.symLinkedProjects.forEach((symlinkedProjects, symlinkedPath) => {
for (const project of symlinkedProjects) {
cb(project, symlinkedPath);
}
});
}
}
type CombineProjectOutputCallback<TLocation extends DocumentPosition | undefined> = (
project: Project,
location: TLocation,
getMappedLocation: (project: Project, location: DocumentPosition) => DocumentPosition | undefined,
) => void;
function combineProjectOutputWorker<TLocation extends DocumentPosition | undefined>(
projects: Projects,
defaultProject: Project,
initialLocation: TLocation,
cb: CombineProjectOutputCallback<TLocation>
): void {
const projectService = defaultProject.projectService;
let toDo: ProjectAndLocation<TLocation>[] | undefined;
const seenProjects = new Set<string>();
forEachProjectInProjects(projects, initialLocation && initialLocation.fileName, (project, path) => {
// TLocation should be either `DocumentPosition` or `undefined`. Since `initialLocation` is `TLocation` this cast should be valid.
const location = (initialLocation ? { fileName: path, pos: initialLocation.pos } : undefined) as TLocation;
toDo = callbackProjectAndLocation(project, location, projectService, toDo, seenProjects, cb);
});
// After initial references are collected, go over every other project and see if it has a reference for the symbol definition.
if (initialLocation) {
const defaultDefinition = getDefinitionLocation(defaultProject, initialLocation!);
if (defaultDefinition) {
const getGeneratedDefinition = memoize(() => defaultProject.isSourceOfProjectReferenceRedirect(defaultDefinition.fileName) ?
defaultDefinition :
defaultProject.getLanguageService().getSourceMapper().tryGetGeneratedPosition(defaultDefinition));
const getSourceDefinition = memoize(() => defaultProject.isSourceOfProjectReferenceRedirect(defaultDefinition.fileName) ?
defaultDefinition :
defaultProject.getLanguageService().getSourceMapper().tryGetSourcePosition(defaultDefinition));
projectService.loadAncestorProjectTree(seenProjects);
projectService.forEachEnabledProject(project => {
if (!addToSeen(seenProjects, project)) return;
const definition = mapDefinitionInProject(defaultDefinition, project, getGeneratedDefinition, getSourceDefinition);
if (definition) {
toDo = callbackProjectAndLocation<TLocation>(project, definition as TLocation, projectService, toDo, seenProjects, cb);
}
});
}
}
while (toDo && toDo.length) {
const next = toDo.pop();
Debug.assertIsDefined(next);
toDo = callbackProjectAndLocation(next.project, next.location, projectService, toDo, seenProjects, cb);
}
}
function mapDefinitionInProject(
definition: DocumentPosition,
project: Project,
getGeneratedDefinition: () => DocumentPosition | undefined,
getSourceDefinition: () => DocumentPosition | undefined
): DocumentPosition | undefined {
// If the definition is actually from the project, definition is correct as is
if (project.containsFile(toNormalizedPath(definition.fileName)) &&
!isLocationProjectReferenceRedirect(project, definition)) {
return definition;
}
const generatedDefinition = getGeneratedDefinition();
if (generatedDefinition && project.containsFile(toNormalizedPath(generatedDefinition.fileName))) return generatedDefinition;
const sourceDefinition = getSourceDefinition();
return sourceDefinition && project.containsFile(toNormalizedPath(sourceDefinition.fileName)) ? sourceDefinition : undefined;
}
function isLocationProjectReferenceRedirect(project: Project, location: DocumentPosition | undefined) {
if (!location) return false;
const program = project.getLanguageService().getProgram();
if (!program) return false;
const sourceFile = program.getSourceFile(location.fileName);
// It is possible that location is attached to project but
// the program actually includes its redirect instead.
// This happens when rootFile in project is one of the file from referenced project
// Thus root is attached but program doesnt have the actual .ts file but .d.ts
// If this is not the file we were actually looking, return rest of the toDo
return !!sourceFile &&
sourceFile.resolvedPath !== sourceFile.path &&
sourceFile.resolvedPath !== project.toPath(location.fileName);
}
function callbackProjectAndLocation<TLocation extends DocumentPosition | undefined>(
project: Project,
location: TLocation,
projectService: ProjectService,
toDo: ProjectAndLocation<TLocation>[] | undefined,
seenProjects: Set<string>,
cb: CombineProjectOutputCallback<TLocation>,
): ProjectAndLocation<TLocation>[] | undefined {
if (project.getCancellationToken().isCancellationRequested()) return undefined; // Skip rest of toDo if cancelled
// If this is not the file we were actually looking, return rest of the toDo
if (isLocationProjectReferenceRedirect(project, location)) return toDo;
cb(project, location, (innerProject, location) => {
addToSeen(seenProjects, project);
const originalLocation = projectService.getOriginalLocationEnsuringConfiguredProject(innerProject, location);
if (!originalLocation) return undefined;
const originalScriptInfo = projectService.getScriptInfo(originalLocation.fileName)!;
toDo = toDo || [];
for (const project of originalScriptInfo.containingProjects) {
addToTodo(project, originalLocation as TLocation, toDo, seenProjects);
}
const symlinkedProjectsMap = projectService.getSymlinkedProjects(originalScriptInfo);
if (symlinkedProjectsMap) {
symlinkedProjectsMap.forEach((symlinkedProjects, symlinkedPath) => {
for (const symlinkedProject of symlinkedProjects) {
addToTodo(symlinkedProject, { fileName: symlinkedPath as string, pos: originalLocation.pos } as TLocation, toDo!, seenProjects);
}
});
}
return originalLocation === location ? undefined : originalLocation;
});
return toDo;
}
function addToTodo<TLocation extends DocumentPosition | undefined>(project: Project, location: TLocation, toDo: Push<ProjectAndLocation<TLocation>>, seenProjects: Set<string>): void {
if (!project.isOrphan() && addToSeen(seenProjects, project)) toDo.push({ project, location });
}
function addToSeen(seenProjects: Set<string>, project: Project) {
return tryAddToSet(seenProjects, getProjectKey(project));
}
function getProjectKey(project: Project) {
return isConfiguredProject(project) ? project.canonicalConfigFilePath : project.getProjectName();
}
function documentSpanLocation({ fileName, textSpan }: DocumentSpan): DocumentPosition {
return { fileName, pos: textSpan.start };
}
function getMappedLocation(location: DocumentPosition, project: Project): DocumentPosition | undefined {
const mapsTo = project.getSourceMapper().tryGetSourcePosition(location);
return mapsTo && project.projectService.fileExists(toNormalizedPath(mapsTo.fileName)) ? mapsTo : undefined;
}
function getMappedDocumentSpan(documentSpan: DocumentSpan, project: Project): DocumentSpan | undefined {
const newPosition = getMappedLocation(documentSpanLocation(documentSpan), project);
if (!newPosition) return undefined;
return {
fileName: newPosition.fileName,
textSpan: {
start: newPosition.pos,
length: documentSpan.textSpan.length
},
originalFileName: documentSpan.fileName,
originalTextSpan: documentSpan.textSpan,
contextSpan: getMappedContextSpan(documentSpan, project),
originalContextSpan: documentSpan.contextSpan
};
}
function getMappedContextSpan(documentSpan: DocumentSpan, project: Project): TextSpan | undefined {
const contextSpanStart = documentSpan.contextSpan && getMappedLocation(
{ fileName: documentSpan.fileName, pos: documentSpan.contextSpan.start },
project
);
const contextSpanEnd = documentSpan.contextSpan && getMappedLocation(
{ fileName: documentSpan.fileName, pos: documentSpan.contextSpan.start + documentSpan.contextSpan.length },
project
);
return contextSpanStart && contextSpanEnd ?
{ start: contextSpanStart.pos, length: contextSpanEnd.pos - contextSpanStart.pos } :
undefined;
}
const invalidPartialSemanticModeCommands: readonly CommandNames[] = [
CommandNames.OpenExternalProject,
CommandNames.OpenExternalProjects,
CommandNames.CloseExternalProject,
CommandNames.SynchronizeProjectList,
CommandNames.EmitOutput,
CommandNames.CompileOnSaveAffectedFileList,
CommandNames.CompileOnSaveEmitFile,
CommandNames.CompilerOptionsDiagnosticsFull,
CommandNames.EncodedSemanticClassificationsFull,
CommandNames.SemanticDiagnosticsSync,
CommandNames.SyntacticDiagnosticsSync,
CommandNames.SuggestionDiagnosticsSync,
CommandNames.Geterr,
CommandNames.GeterrForProject,
CommandNames.Reload,
CommandNames.ReloadProjects,
CommandNames.GetCodeFixes,
CommandNames.GetCodeFixesFull,
CommandNames.GetCombinedCodeFix,
CommandNames.GetCombinedCodeFixFull,
CommandNames.ApplyCodeActionCommand,
CommandNames.GetSupportedCodeFixes,
CommandNames.GetApplicableRefactors,
CommandNames.GetEditsForRefactor,
CommandNames.GetEditsForRefactorFull,
CommandNames.OrganizeImports,
CommandNames.OrganizeImportsFull,
CommandNames.GetEditsForFileRename,
CommandNames.GetEditsForFileRenameFull,
CommandNames.ConfigurePlugin,
CommandNames.PrepareCallHierarchy,
CommandNames.ProvideCallHierarchyIncomingCalls,
CommandNames.ProvideCallHierarchyOutgoingCalls,
];
const invalidSyntacticModeCommands: readonly CommandNames[] = [
...invalidPartialSemanticModeCommands,
CommandNames.Definition,
CommandNames.DefinitionFull,
CommandNames.DefinitionAndBoundSpan,
CommandNames.DefinitionAndBoundSpanFull,
CommandNames.TypeDefinition,
CommandNames.Implementation,
CommandNames.ImplementationFull,
CommandNames.References,
CommandNames.ReferencesFull,
CommandNames.Rename,
CommandNames.RenameLocationsFull,
CommandNames.RenameInfoFull,
CommandNames.Quickinfo,
CommandNames.QuickinfoFull,
CommandNames.CompletionInfo,
CommandNames.Completions,
CommandNames.CompletionsFull,
CommandNames.CompletionDetails,
CommandNames.CompletionDetailsFull,
CommandNames.SignatureHelp,
CommandNames.SignatureHelpFull,
CommandNames.Navto,
CommandNames.NavtoFull,
CommandNames.Occurrences,
CommandNames.DocumentHighlights,
CommandNames.DocumentHighlightsFull,
];
export interface SessionOptions {
host: ServerHost;
cancellationToken: ServerCancellationToken;
useSingleInferredProject: boolean;
useInferredProjectPerProjectRoot: boolean;
typingsInstaller: ITypingsInstaller;
byteLength: (buf: string, encoding?: string) => number;
hrtime: (start?: number[]) => number[];
logger: Logger;
/**
* If falsy, all events are suppressed.
*/
canUseEvents: boolean;
eventHandler?: ProjectServiceEventHandler;
/** Has no effect if eventHandler is also specified. */
suppressDiagnosticEvents?: boolean;
/** @deprecated use serverMode instead */
syntaxOnly?: boolean;
serverMode?: LanguageServiceMode;
throttleWaitMilliseconds?: number;
noGetErrOnBackgroundUpdate?: boolean;
globalPlugins?: readonly string[];
pluginProbeLocations?: readonly string[];
allowLocalPluginLoads?: boolean;
typesMapLocation?: string;
}
export class Session<TMessage = string> implements EventSender {
private readonly gcTimer: GcTimer;
protected projectService: ProjectService;
private changeSeq = 0;
private performanceData: protocol.PerformanceData | undefined;
private currentRequestId!: number;
private errorCheck: MultistepOperation;
protected host: ServerHost;
private readonly cancellationToken: ServerCancellationToken;
protected readonly typingsInstaller: ITypingsInstaller;
protected byteLength: (buf: string, encoding?: string) => number;
private hrtime: (start?: number[]) => number[];
protected logger: Logger;
protected canUseEvents: boolean;
private suppressDiagnosticEvents?: boolean;
private eventHandler: ProjectServiceEventHandler | undefined;
private readonly noGetErrOnBackgroundUpdate?: boolean;
constructor(opts: SessionOptions) {
this.host = opts.host;
this.cancellationToken = opts.cancellationToken;
this.typingsInstaller = opts.typingsInstaller;
this.byteLength = opts.byteLength;
this.hrtime = opts.hrtime;
this.logger = opts.logger;
this.canUseEvents = opts.canUseEvents;
this.suppressDiagnosticEvents = opts.suppressDiagnosticEvents;
this.noGetErrOnBackgroundUpdate = opts.noGetErrOnBackgroundUpdate;
const { throttleWaitMilliseconds } = opts;
this.eventHandler = this.canUseEvents
? opts.eventHandler || (event => this.defaultEventHandler(event))
: undefined;
const multistepOperationHost: MultistepOperationHost = {
executeWithRequestId: (requestId, action) => this.executeWithRequestId(requestId, action),
getCurrentRequestId: () => this.currentRequestId,
getServerHost: () => this.host,
logError: (err, cmd) => this.logError(err, cmd),
sendRequestCompletedEvent: requestId => this.sendRequestCompletedEvent(requestId),
isCancellationRequested: () => this.cancellationToken.isCancellationRequested()
};
this.errorCheck = new MultistepOperation(multistepOperationHost);
const settings: ProjectServiceOptions = {
host: this.host,
logger: this.logger,
cancellationToken: this.cancellationToken,
useSingleInferredProject: opts.useSingleInferredProject,
useInferredProjectPerProjectRoot: opts.useInferredProjectPerProjectRoot,
typingsInstaller: this.typingsInstaller,
throttleWaitMilliseconds,
eventHandler: this.eventHandler,
suppressDiagnosticEvents: this.suppressDiagnosticEvents,
globalPlugins: opts.globalPlugins,
pluginProbeLocations: opts.pluginProbeLocations,
allowLocalPluginLoads: opts.allowLocalPluginLoads,
typesMapLocation: opts.typesMapLocation,
syntaxOnly: opts.syntaxOnly,
serverMode: opts.serverMode,
};
this.projectService = new ProjectService(settings);
this.projectService.setPerformanceEventHandler(this.performanceEventHandler.bind(this));
this.gcTimer = new GcTimer(this.host, /*delay*/ 7000, this.logger);
// Make sure to setup handlers to throw error for not allowed commands on syntax server
switch (this.projectService.serverMode) {
case LanguageServiceMode.Semantic:
break;
case LanguageServiceMode.PartialSemantic:
invalidPartialSemanticModeCommands.forEach(commandName =>
this.handlers.set(commandName, request => {
throw new Error(`Request: ${request.command} not allowed in LanguageServiceMode.PartialSemantic`);
})
);
break;
case LanguageServiceMode.Syntactic:
invalidSyntacticModeCommands.forEach(commandName =>
this.handlers.set(commandName, request => {
throw new Error(`Request: ${request.command} not allowed in LanguageServiceMode.Syntactic`);
})
);
break;
default:
Debug.assertNever(this.projectService.serverMode);
}
}
private sendRequestCompletedEvent(requestId: number): void {
this.event<protocol.RequestCompletedEventBody>({ request_seq: requestId }, "requestCompleted");
}
private addPerformanceData(key: keyof protocol.PerformanceData, value: number) {
if (!this.performanceData) {
this.performanceData = {};
}
this.performanceData[key] = (this.performanceData[key] ?? 0) + value;
}
private performanceEventHandler(event: PerformanceEvent) {
switch (event.kind) {
case "UpdateGraph":
this.addPerformanceData("updateGraphDurationMs", event.durationMs);
break;
case "CreatePackageJsonAutoImportProvider":
this.addPerformanceData("createAutoImportProviderProgramDurationMs", event.durationMs);
break;
}
}
private defaultEventHandler(event: ProjectServiceEvent) {
switch (event.eventName) {
case ProjectsUpdatedInBackgroundEvent:
const { openFiles } = event.data;
this.projectsUpdatedInBackgroundEvent(openFiles);
break;
case ProjectLoadingStartEvent:
const { project, reason } = event.data;
this.event<protocol.ProjectLoadingStartEventBody>(
{ projectName: project.getProjectName(), reason },
ProjectLoadingStartEvent);
break;
case ProjectLoadingFinishEvent:
const { project: finishProject } = event.data;
this.event<protocol.ProjectLoadingFinishEventBody>({ projectName: finishProject.getProjectName() }, ProjectLoadingFinishEvent);
break;
case LargeFileReferencedEvent:
const { file, fileSize, maxFileSize } = event.data;
this.event<protocol.LargeFileReferencedEventBody>({ file, fileSize, maxFileSize }, LargeFileReferencedEvent);
break;
case ConfigFileDiagEvent:
const { triggerFile, configFileName: configFile, diagnostics } = event.data;
const bakedDiags = map(diagnostics, diagnostic => formatDiagnosticToProtocol(diagnostic, /*includeFileName*/ true));
this.event<protocol.ConfigFileDiagnosticEventBody>({
triggerFile,
configFile,
diagnostics: bakedDiags
}, ConfigFileDiagEvent);
break;
case ProjectLanguageServiceStateEvent: {
const eventName: protocol.ProjectLanguageServiceStateEventName = ProjectLanguageServiceStateEvent;
this.event<protocol.ProjectLanguageServiceStateEventBody>({
projectName: event.data.project.getProjectName(),
languageServiceEnabled: event.data.languageServiceEnabled
}, eventName);
break;
}
case ProjectInfoTelemetryEvent: {
const eventName: protocol.TelemetryEventName = "telemetry";
this.event<protocol.TelemetryEventBody>({
telemetryEventName: event.eventName,
payload: event.data,
}, eventName);
break;
}
}
}
private projectsUpdatedInBackgroundEvent(openFiles: string[]): void {
this.projectService.logger.info(`got projects updated in background, updating diagnostics for ${openFiles}`);
if (openFiles.length) {
if (!this.suppressDiagnosticEvents && !this.noGetErrOnBackgroundUpdate) {
// For now only queue error checking for open files. We can change this to include non open files as well
this.errorCheck.startNew(next => this.updateErrorCheck(next, openFiles, 100, /*requireOpen*/ true));
}
// Send project changed event
this.event<protocol.ProjectsUpdatedInBackgroundEventBody>({
openFiles
}, ProjectsUpdatedInBackgroundEvent);
}
}
public logError(err: Error, cmd: string): void {
this.logErrorWorker(err, cmd);
}
private logErrorWorker(err: Error & PossibleProgramFileInfo, cmd: string, fileRequest?: protocol.FileRequestArgs): void {
let msg = "Exception on executing command " + cmd;
if (err.message) {
msg += ":\n" + indent(err.message);
if ((<StackTraceError>err).stack) {
msg += "\n" + indent((<StackTraceError>err).stack!);
}
}
if (this.logger.hasLevel(LogLevel.verbose)) {
if (fileRequest) {
try {
const { file, project } = this.getFileAndProject(fileRequest);
const scriptInfo = project.getScriptInfoForNormalizedPath(file);
if (scriptInfo) {
const text = getSnapshotText(scriptInfo.getSnapshot());
msg += `\n\nFile text of ${fileRequest.file}:${indent(text)}\n`;
}
}
catch { } // eslint-disable-line no-empty
}
if (err.ProgramFiles) {
msg += `\n\nProgram files: ${JSON.stringify(err.ProgramFiles)}\n`;
msg += `\n\nProjects::\n`;
let counter = 0;
const addProjectInfo = (project: Project) => {
msg += `\nProject '${project.projectName}' (${ProjectKind[project.projectKind]}) ${counter}\n`;
msg += project.filesToString(/*writeProjectFileNames*/ true);
msg += "\n-----------------------------------------------\n";
counter++;
};
this.projectService.externalProjects.forEach(addProjectInfo);
this.projectService.configuredProjects.forEach(addProjectInfo);
this.projectService.inferredProjects.forEach(addProjectInfo);
}
}
this.logger.msg(msg, Msg.Err);
}
public send(msg: protocol.Message) {
if (msg.type === "event" && !this.canUseEvents) {
if (this.logger.hasLevel(LogLevel.verbose)) {
this.logger.info(`Session does not support events: ignored event: ${JSON.stringify(msg)}`);
}
return;
}
const msgText = formatMessage(msg, this.logger, this.byteLength, this.host.newLine);
perfLogger.logEvent(`Response message size: ${msgText.length}`);
this.host.write(msgText);
}
public event<T extends object>(body: T, eventName: string): void {
tracing?.instant(tracing.Phase.Session, "event", { eventName });
this.send(toEvent(eventName, body));
}
// For backwards-compatibility only.
/** @deprecated */
public output(info: any, cmdName: string, reqSeq?: number, errorMsg?: string): void {
this.doOutput(info, cmdName, reqSeq!, /*success*/ !errorMsg, errorMsg); // TODO: GH#18217
}
private doOutput(info: {} | undefined, cmdName: string, reqSeq: number, success: boolean, message?: string): void {
const res: protocol.Response = {
seq: 0,
type: "response",
command: cmdName,
request_seq: reqSeq,
success,
performanceData: this.performanceData
};
if (success) {
let metadata: unknown;
if (isArray(info)) {
res.body = info;
metadata = (info as WithMetadata<readonly any[]>).metadata;
delete (info as WithMetadata<readonly any[]>).metadata;
}
else if (typeof info === "object") {
if ((info as WithMetadata<{}>).metadata) {
const { metadata: infoMetadata, ...body } = (info as WithMetadata<{}>);
res.body = body;
metadata = infoMetadata;
}
else {
res.body = info;
}
}
else {
res.body = info;
}
if (metadata) res.metadata = metadata;
}
else {
Debug.assert(info === undefined);
}
if (message) {
res.message = message;
}
this.send(res);
}