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application.ts
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application.ts
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import * as Path from "path";
import ts from "typescript";
import { Converter } from "./converter/index";
import { Renderer } from "./output/renderer";
import { Serializer } from "./serialization";
import type { ProjectReflection } from "./models/index";
import {
Logger,
ConsoleLogger,
CallbackLogger,
loadPlugins,
writeFile,
discoverPlugins,
TSConfigReader,
} from "./utils/index";
import {
AbstractComponent,
ChildableComponent,
Component,
} from "./utils/component";
import { Options, BindOption } from "./utils";
import type { TypeDocOptions } from "./utils/options/declaration";
import { unique } from "./utils/array";
import { ok } from "assert";
import {
DocumentationEntryPoint,
EntryPointStrategy,
getEntryPoints,
getWatchEntryPoints,
} from "./utils/entry-point";
import { nicePath } from "./utils/paths";
import { getLoadedPaths, hasBeenLoadedMultipleTimes } from "./utils/general";
import { validateExports } from "./validation/exports";
import { validateDocumentation } from "./validation/documentation";
import { validateLinks } from "./validation/links";
import { ApplicationEvents } from "./application-events";
// eslint-disable-next-line @typescript-eslint/no-var-requires
const packageInfo = require("../../package.json") as {
version: string;
peerDependencies: { typescript: string };
};
const supportedVersionMajorMinor = packageInfo.peerDependencies.typescript
.split("||")
.map((version) => version.replace(/^\s*|\.x\s*$/g, ""));
/**
* The default TypeDoc main application class.
*
* This class holds the two main components of TypeDoc, the {@link Converter} and
* the {@link Renderer}. When running TypeDoc, first the {@link Converter} is invoked which
* generates a {@link ProjectReflection} from the passed in source files. The
* {@link ProjectReflection} is a hierarchical model representation of the TypeScript
* project. Afterwards the model is passed to the {@link Renderer} which uses an instance
* of {@link Theme} to generate the final documentation.
*
* Both the {@link Converter} and the {@link Renderer} emit a series of events while processing the project.
* Subscribe to these Events to control the application flow or alter the output.
*/
@Component({ name: "application", internal: true })
export class Application extends ChildableComponent<
Application,
AbstractComponent<Application>
> {
/**
* The converter used to create the declaration reflections.
*/
converter: Converter;
/**
* The renderer used to generate the documentation output.
*/
renderer: Renderer;
/**
* The serializer used to generate JSON output.
*/
serializer: Serializer;
/**
* The logger that should be used to output messages.
*/
logger: Logger;
options: Options;
/** @internal */
@BindOption("logger")
readonly loggerType!: string | Function;
/** @internal */
@BindOption("skipErrorChecking")
readonly skipErrorChecking!: boolean;
/**
* The version number of TypeDoc.
*/
static VERSION = packageInfo.version;
/**
* Emitted after plugins have been loaded and options have been read, but before they have been frozen.
* The listener will be given an instance of {@link Application} and the {@link TypeDocOptions | Partial<TypeDocOptions>}
* passed to `bootstrap`.
*/
static readonly EVENT_BOOTSTRAP_END = ApplicationEvents.BOOTSTRAP_END;
/**
* Emitted when validation is being run.
* The listener will be given an instance of {@link ProjectReflection}.
*/
static readonly EVENT_VALIDATION_RUN = ApplicationEvents.VALIDATION_RUN;
/**
* Create a new TypeDoc application instance.
*/
constructor() {
super(null!); // We own ourselves
this.logger = new ConsoleLogger();
this.options = new Options(this.logger);
this.options.addDefaultDeclarations();
this.serializer = new Serializer();
this.converter = this.addComponent<Converter>("converter", Converter);
this.renderer = this.addComponent<Renderer>("renderer", Renderer);
}
/**
* Initialize TypeDoc with the given options object.
*
* @param options The desired options to set.
*/
bootstrap(options: Partial<TypeDocOptions> = {}): void {
for (const [key, val] of Object.entries(options)) {
try {
this.options.setValue(key as keyof TypeDocOptions, val);
} catch {
// Ignore errors, plugins haven't been loaded yet and may declare an option.
}
}
this.options.read(new Logger());
const logger = this.loggerType;
if (typeof logger === "function") {
this.logger = new CallbackLogger(<any>logger);
this.options.setLogger(this.logger);
} else if (logger === "none") {
this.logger = new Logger();
this.options.setLogger(this.logger);
}
this.logger.level = this.options.getValue("logLevel");
const plugins = discoverPlugins(this);
loadPlugins(this, plugins);
this.options.reset();
for (const [key, val] of Object.entries(options)) {
try {
this.options.setValue(key as keyof TypeDocOptions, val);
} catch (error) {
ok(error instanceof Error);
this.logger.error(error.message);
}
}
this.options.read(this.logger);
if (hasBeenLoadedMultipleTimes()) {
this.logger.warn(
`TypeDoc has been loaded multiple times. This is commonly caused by plugins which have their own installation of TypeDoc. The loaded paths are:\n\t${getLoadedPaths().join(
"\n\t"
)}`
);
}
this.trigger(ApplicationEvents.BOOTSTRAP_END, this, options);
}
/**
* Return the path to the TypeScript compiler.
*/
public getTypeScriptPath(): string {
return nicePath(Path.dirname(require.resolve("typescript")));
}
public getTypeScriptVersion(): string {
return ts.version;
}
/**
* Gets the entry points to be documented according to the current `entryPoints` and `entryPointStrategy` options.
* May return undefined if entry points fail to be expanded.
*/
public getEntryPoints(): DocumentationEntryPoint[] | undefined {
return getEntryPoints(this.logger, this.options);
}
/**
* Run the converter for the given set of files and return the generated reflections.
*
* @returns An instance of ProjectReflection on success, undefined otherwise.
*/
public convert(): ProjectReflection | undefined {
const start = Date.now();
// We seal here rather than in the Converter class since TypeDoc's tests reuse the Application
// with a few different settings.
this.options.freeze();
this.logger.verbose(
`Using TypeScript ${this.getTypeScriptVersion()} from ${this.getTypeScriptPath()}`
);
if (
!supportedVersionMajorMinor.some(
(version) => version == ts.versionMajorMinor
)
) {
this.logger.warn(
`You are running with an unsupported TypeScript version! If TypeDoc crashes, this is why. TypeDoc supports ${supportedVersionMajorMinor.join(
", "
)}`
);
}
const entryPoints = this.getEntryPoints();
if (!entryPoints) {
// Fatal error already reported.
return;
}
const programs = unique(entryPoints.map((e) => e.program));
this.logger.verbose(
`Converting with ${programs.length} programs ${entryPoints.length} entry points`
);
if (this.skipErrorChecking === false) {
const errors = programs.flatMap((program) =>
ts.getPreEmitDiagnostics(program)
);
if (errors.length) {
this.logger.diagnostics(errors);
return;
}
}
if (this.options.getValue("emit") === "both") {
for (const program of programs) {
program.emit();
}
}
const startConversion = Date.now();
this.logger.verbose(
`Finished getting entry points in ${Date.now() - start}ms`
);
const project = this.converter.convert(entryPoints);
this.logger.verbose(
`Finished conversion in ${Date.now() - startConversion}ms`
);
return project;
}
public convertAndWatch(
success: (project: ProjectReflection) => Promise<void>
): void {
this.options.freeze();
if (
!this.options.getValue("preserveWatchOutput") &&
this.logger instanceof ConsoleLogger
) {
ts.sys.clearScreen?.();
}
this.logger.verbose(
`Using TypeScript ${this.getTypeScriptVersion()} from ${this.getTypeScriptPath()}`
);
if (
!supportedVersionMajorMinor.some(
(version) => version == ts.versionMajorMinor
)
) {
this.logger.warn(
`You are running with an unsupported TypeScript version! TypeDoc supports ${supportedVersionMajorMinor.join(
", "
)}`
);
}
if (Object.keys(this.options.getCompilerOptions()).length === 0) {
this.logger.warn(
`No compiler options set. This likely means that TypeDoc did not find your tsconfig.json. Generated documentation will probably be empty.`
);
}
// Doing this is considerably more complicated, we'd need to manage an array of programs, not convert until all programs
// have reported in the first time... just error out for now. I'm not convinced anyone will actually notice.
if (this.options.getFileNames().length === 0) {
this.logger.error(
"The provided tsconfig file looks like a solution style tsconfig, which is not supported in watch mode."
);
return;
}
// Support for packages mode is currently unimplemented
if (
this.options.getValue("entryPointStrategy") ===
EntryPointStrategy.Packages
) {
this.logger.error(
"The packages option of entryPointStrategy is not supported in watch mode."
);
return;
}
const tsconfigFile =
TSConfigReader.findConfigFile(this.options.getValue("tsconfig")) ??
"tsconfig.json";
// We don't want to do it the first time to preserve initial debug status messages. They'll be lost
// after the user saves a file, but better than nothing...
let firstStatusReport = true;
const host = ts.createWatchCompilerHost(
tsconfigFile,
{},
ts.sys,
ts.createEmitAndSemanticDiagnosticsBuilderProgram,
(diagnostic) => this.logger.diagnostic(diagnostic),
(status, newLine, _options, errorCount) => {
if (
!firstStatusReport &&
errorCount === void 0 &&
!this.options.getValue("preserveWatchOutput") &&
this.logger instanceof ConsoleLogger
) {
ts.sys.clearScreen?.();
}
firstStatusReport = false;
this.logger.info(
ts.flattenDiagnosticMessageText(status.messageText, newLine)
);
}
);
let successFinished = true;
let currentProgram: ts.Program | undefined;
const runSuccess = () => {
if (!currentProgram) {
return;
}
if (successFinished) {
if (this.options.getValue("emit") === "both") {
currentProgram.emit();
}
this.logger.resetErrors();
this.logger.resetWarnings();
const entryPoints = getWatchEntryPoints(
this.logger,
this.options,
currentProgram
);
if (!entryPoints) {
return;
}
const project = this.converter.convert(entryPoints);
currentProgram = undefined;
successFinished = false;
void success(project).then(() => {
successFinished = true;
runSuccess();
});
}
};
const origCreateProgram = host.createProgram;
host.createProgram = (
rootNames,
options,
host,
oldProgram,
configDiagnostics,
references
) => {
// If we always do this, we'll get a crash the second time a program is created.
if (rootNames !== undefined) {
options = this.options.fixCompilerOptions(options || {});
}
return origCreateProgram(
rootNames,
options,
host,
oldProgram,
configDiagnostics,
references
);
};
const origAfterProgramCreate = host.afterProgramCreate;
host.afterProgramCreate = (program) => {
if (ts.getPreEmitDiagnostics(program.getProgram()).length === 0) {
currentProgram = program.getProgram();
runSuccess();
}
origAfterProgramCreate?.(program);
};
ts.createWatchProgram(host);
}
validate(project: ProjectReflection) {
const checks = this.options.getValue("validation");
const start = Date.now();
if (checks.notExported) {
validateExports(
project,
this.logger,
this.options.getValue("intentionallyNotExported")
);
}
if (checks.notDocumented) {
validateDocumentation(
project,
this.logger,
this.options.getValue("requiredToBeDocumented")
);
}
if (checks.invalidLink) {
validateLinks(project, this.logger);
}
this.trigger(Application.EVENT_VALIDATION_RUN, project);
this.logger.verbose(`Validation took ${Date.now() - start}ms`);
}
/**
* Render HTML for the given project
*/
public async generateDocs(
project: ProjectReflection,
out: string
): Promise<void> {
const start = Date.now();
out = Path.resolve(out);
await this.renderer.render(project, out);
if (this.logger.hasErrors()) {
this.logger.error(
"Documentation could not be generated due to the errors above."
);
} else {
this.logger.info(`Documentation generated at ${nicePath(out)}`);
this.logger.verbose(`HTML rendering took ${Date.now() - start}ms`);
}
}
/**
* Run the converter for the given set of files and write the reflections to a json file.
*
* @param out The path and file name of the target file.
* @returns Whether the JSON file could be written successfully.
*/
public async generateJson(
project: ProjectReflection,
out: string
): Promise<void> {
const start = Date.now();
out = Path.resolve(out);
const eventData = {
outputDirectory: Path.dirname(out),
outputFile: Path.basename(out),
};
const ser = this.serializer.projectToObject(project, {
begin: eventData,
end: eventData,
});
const space = this.options.getValue("pretty") ? "\t" : "";
await writeFile(out, JSON.stringify(ser, null, space));
this.logger.info(`JSON written to ${nicePath(out)}`);
this.logger.verbose(`JSON rendering took ${Date.now() - start}ms`);
}
/**
* Print the version number.
*/
override toString() {
return [
"",
`TypeDoc ${Application.VERSION}`,
`Using TypeScript ${this.getTypeScriptVersion()} from ${this.getTypeScriptPath()}`,
"",
].join("\n");
}
}