1
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-12-25 00:29:09 -05:00
denoland-deno/cli/js/compiler_host.ts
Kitson Kelly 6bd846a780
Improvements to bundling. (#3965)
Moves to using a minimal System loader for bundles generated by Deno.
TypeScript in 3.8 will be able to output TLA for modules, and the loader
is written to take advantage of that as soon as we update Deno to TS
3.8.

System also allows us to support `import.meta` and provide more ESM
aligned assignment of exports, as well as there is better handling of
circular imports.

The loader is also very terse versus to try to save overhead.

Also, fixed an issue where abstract classes were not being re-exported.

Fixes #2553
Fixes #3559
Fixes #3751
Fixes #3825
Refs #3301
2020-02-12 16:41:51 -05:00

323 lines
8.4 KiB
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { MediaType, SourceFile } from "./compiler_sourcefile.ts";
import { OUT_DIR, WriteFileCallback, getAsset } from "./compiler_util.ts";
import { cwd } from "./dir.ts";
import { assert, notImplemented } from "./util.ts";
import * as util from "./util.ts";
/** Specifies the target that the host should use to inform the TypeScript
* compiler of what types should be used to validate the program against. */
export enum CompilerHostTarget {
/** The main isolate library, where the main program runs. */
Main = "main",
/** The runtime API library. */
Runtime = "runtime",
/** The worker isolate library, where worker programs run. */
Worker = "worker"
}
export interface CompilerHostOptions {
bundle?: boolean;
target: CompilerHostTarget;
writeFile: WriteFileCallback;
}
export interface ConfigureResponse {
ignoredOptions?: string[];
diagnostics?: ts.Diagnostic[];
}
export const ASSETS = "$asset$";
/** Options that need to be used when generating a bundle (either trusted or
* runtime). */
export const defaultBundlerOptions: ts.CompilerOptions = {
inlineSourceMap: false,
module: ts.ModuleKind.System,
outDir: undefined,
outFile: `${OUT_DIR}/bundle.js`,
// disabled until we have effective way to modify source maps
sourceMap: false
};
/** Default options used by the compiler Host when compiling. */
export const defaultCompileOptions: ts.CompilerOptions = {
allowJs: true,
allowNonTsExtensions: true,
// TODO(#3324) Enable strict mode for user code.
// strict: true,
checkJs: false,
esModuleInterop: true,
module: ts.ModuleKind.ESNext,
outDir: OUT_DIR,
resolveJsonModule: true,
sourceMap: true,
stripComments: true,
target: ts.ScriptTarget.ESNext,
jsx: ts.JsxEmit.React
};
/** Options that need to be used when doing a runtime (non bundled) compilation */
export const defaultRuntimeCompileOptions: ts.CompilerOptions = {
outDir: undefined
};
/** Default options used when doing a transpile only. */
export const defaultTranspileOptions: ts.CompilerOptions = {
esModuleInterop: true,
module: ts.ModuleKind.ESNext,
sourceMap: true,
scriptComments: true,
target: ts.ScriptTarget.ESNext
};
/** Options that either do nothing in Deno, or would cause undesired behavior
* if modified. */
const ignoredCompilerOptions: readonly string[] = [
"allowSyntheticDefaultImports",
"baseUrl",
"build",
"composite",
"declaration",
"declarationDir",
"declarationMap",
"diagnostics",
"downlevelIteration",
"emitBOM",
"emitDeclarationOnly",
"esModuleInterop",
"extendedDiagnostics",
"forceConsistentCasingInFileNames",
"help",
"importHelpers",
"incremental",
"inlineSourceMap",
"inlineSources",
"init",
"isolatedModules",
"lib",
"listEmittedFiles",
"listFiles",
"mapRoot",
"maxNodeModuleJsDepth",
"module",
"moduleResolution",
"newLine",
"noEmit",
"noEmitHelpers",
"noEmitOnError",
"noLib",
"noResolve",
"out",
"outDir",
"outFile",
"paths",
"preserveSymlinks",
"preserveWatchOutput",
"pretty",
"rootDir",
"rootDirs",
"showConfig",
"skipDefaultLibCheck",
"skipLibCheck",
"sourceMap",
"sourceRoot",
"stripInternal",
"target",
"traceResolution",
"tsBuildInfoFile",
"types",
"typeRoots",
"version",
"watch"
];
export class Host implements ts.CompilerHost {
private readonly _options = defaultCompileOptions;
private _target: CompilerHostTarget;
private _writeFile: WriteFileCallback;
private _getAsset(filename: string): SourceFile {
const url = filename.split("/").pop()!;
const sourceFile = SourceFile.get(url);
if (sourceFile) {
return sourceFile;
}
const name = url.includes(".") ? url : `${url}.d.ts`;
const sourceCode = getAsset(name);
return new SourceFile({
url,
filename,
mediaType: MediaType.TypeScript,
sourceCode
});
}
/* Deno specific APIs */
/** Provides the `ts.HostCompiler` interface for Deno. */
constructor(options: CompilerHostOptions) {
const { bundle = false, target, writeFile } = options;
this._target = target;
this._writeFile = writeFile;
if (bundle) {
// options we need to change when we are generating a bundle
Object.assign(this._options, defaultBundlerOptions);
}
}
/** Take a configuration string, parse it, and use it to merge with the
* compiler's configuration options. The method returns an array of compiler
* options which were ignored, or `undefined`. */
configure(path: string, configurationText: string): ConfigureResponse {
util.log("compiler::host.configure", path);
assert(configurationText);
const { config, error } = ts.parseConfigFileTextToJson(
path,
configurationText
);
if (error) {
return { diagnostics: [error] };
}
const { options, errors } = ts.convertCompilerOptionsFromJson(
config.compilerOptions,
cwd()
);
const ignoredOptions: string[] = [];
for (const key of Object.keys(options)) {
if (
ignoredCompilerOptions.includes(key) &&
(!(key in this._options) || options[key] !== this._options[key])
) {
ignoredOptions.push(key);
delete options[key];
}
}
Object.assign(this._options, options);
return {
ignoredOptions: ignoredOptions.length ? ignoredOptions : undefined,
diagnostics: errors.length ? errors : undefined
};
}
/** Merge options into the host's current set of compiler options and return
* the merged set. */
mergeOptions(...options: ts.CompilerOptions[]): ts.CompilerOptions {
Object.assign(this._options, ...options);
return Object.assign({}, this._options);
}
/* TypeScript CompilerHost APIs */
fileExists(_fileName: string): boolean {
return notImplemented();
}
getCanonicalFileName(fileName: string): string {
return fileName;
}
getCompilationSettings(): ts.CompilerOptions {
util.log("compiler::host.getCompilationSettings()");
return this._options;
}
getCurrentDirectory(): string {
return "";
}
getDefaultLibFileName(_options: ts.CompilerOptions): string {
switch (this._target) {
case CompilerHostTarget.Main:
case CompilerHostTarget.Runtime:
return `${ASSETS}/lib.deno.window.d.ts`;
case CompilerHostTarget.Worker:
return `${ASSETS}/lib.deno.worker.d.ts`;
}
}
getNewLine(): string {
return "\n";
}
getSourceFile(
fileName: string,
languageVersion: ts.ScriptTarget,
onError?: (message: string) => void,
shouldCreateNewSourceFile?: boolean
): ts.SourceFile | undefined {
util.log("compiler::host.getSourceFile", fileName);
try {
assert(!shouldCreateNewSourceFile);
const sourceFile = fileName.startsWith(ASSETS)
? this._getAsset(fileName)
: SourceFile.get(fileName);
assert(sourceFile != null);
if (!sourceFile.tsSourceFile) {
assert(sourceFile.sourceCode != null);
sourceFile.tsSourceFile = ts.createSourceFile(
fileName,
sourceFile.sourceCode,
languageVersion
);
delete sourceFile.sourceCode;
}
return sourceFile.tsSourceFile;
} catch (e) {
if (onError) {
onError(String(e));
} else {
throw e;
}
return undefined;
}
}
readFile(_fileName: string): string | undefined {
return notImplemented();
}
resolveModuleNames(
moduleNames: string[],
containingFile: string
): Array<ts.ResolvedModuleFull | undefined> {
util.log("compiler::host.resolveModuleNames", {
moduleNames,
containingFile
});
return moduleNames.map(specifier => {
const url = SourceFile.getUrl(specifier, containingFile);
const sourceFile = specifier.startsWith(ASSETS)
? this._getAsset(specifier)
: url
? SourceFile.get(url)
: undefined;
if (!sourceFile) {
return undefined;
}
return {
resolvedFileName: sourceFile.url,
isExternalLibraryImport: specifier.startsWith(ASSETS),
extension: sourceFile.extension
};
});
}
useCaseSensitiveFileNames(): boolean {
return true;
}
writeFile(
fileName: string,
data: string,
_writeByteOrderMark: boolean,
_onError?: (message: string) => void,
sourceFiles?: readonly ts.SourceFile[]
): void {
util.log("compiler::host.writeFile", fileName);
this._writeFile(fileName, data, sourceFiles);
}
}