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denoland-deno/cli/js/compiler.ts
Bartek Iwańczuk 79b3bc05d6
workers: basic event loop (#3828)
* establish basic event loop for workers
* make "self.close()" inside worker
* remove "runWorkerMessageLoop() - instead manually call global function 
  in Rust when message arrives. This is done in preparation for structured clone
* refactor "WorkerChannel" and use distinct structs for internal 
  and external channels;  "WorkerChannelsInternal" and "WorkerHandle"
* move "State.worker_channels_internal" to "Worker.internal_channels"
* add "WorkerEvent" enum for child->host communication; 
  currently "Message(Buf)" and  "Error(ErrBox)" variants are supported
* add tests for nested workers
* add tests for worker throwing error on startup
2020-02-11 10:04:59 +01:00

360 lines
11 KiB
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
// TODO(ry) Combine this implementation with //deno_typescript/compiler_main.js
// This module is the entry point for "compiler" isolate, ie. the one
// that is created when Deno needs to compile TS/WASM to JS.
//
// It provides a two functions that should be called by Rust:
// - `bootstrapTsCompilerRuntime`
// - `bootstrapWasmCompilerRuntime`
// Either of these functions must be called when creating isolate
// to properly setup runtime.
// NOTE: this import has side effects!
import "./ts_global.d.ts";
import { TranspileOnlyResult } from "./compiler_api.ts";
import { TS_SNAPSHOT_PROGRAM } from "./compiler_bootstrap.ts";
import { setRootExports } from "./compiler_bundler.ts";
import {
CompilerHostTarget,
defaultBundlerOptions,
defaultRuntimeCompileOptions,
defaultTranspileOptions,
Host
} from "./compiler_host.ts";
import {
processImports,
processLocalImports,
resolveModules
} from "./compiler_imports.ts";
import {
createWriteFile,
CompilerRequestType,
convertCompilerOptions,
ignoredDiagnostics,
WriteFileState,
processConfigureResponse
} from "./compiler_util.ts";
import { Diagnostic } from "./diagnostics.ts";
import { fromTypeScriptDiagnostic } from "./diagnostics_util.ts";
import { assert } from "./util.ts";
import * as util from "./util.ts";
import { bootstrapWorkerRuntime } from "./runtime_worker.ts";
interface CompilerRequestCompile {
type: CompilerRequestType.Compile;
target: CompilerHostTarget;
rootNames: string[];
// TODO(ry) add compiler config to this interface.
// options: ts.CompilerOptions;
configPath?: string;
config?: string;
bundle?: boolean;
outFile?: string;
}
interface CompilerRequestRuntimeCompile {
type: CompilerRequestType.RuntimeCompile;
target: CompilerHostTarget;
rootName: string;
sources?: Record<string, string>;
bundle?: boolean;
options?: string;
}
interface CompilerRequestRuntimeTranspile {
type: CompilerRequestType.RuntimeTranspile;
sources: Record<string, string>;
options?: string;
}
/** The format of the work message payload coming from the privileged side */
type CompilerRequest =
| CompilerRequestCompile
| CompilerRequestRuntimeCompile
| CompilerRequestRuntimeTranspile;
/** The format of the result sent back when doing a compilation. */
interface CompileResult {
emitSkipped: boolean;
diagnostics?: Diagnostic;
}
// TODO(bartlomieju): refactor this function into multiple functions
// per CompilerRequestType
async function tsCompilerOnMessage({
data: request
}: {
data: CompilerRequest;
}): Promise<void> {
switch (request.type) {
// `Compile` are requests from the internals to Deno, generated by both
// the `run` and `bundle` sub command.
case CompilerRequestType.Compile: {
const {
bundle,
config,
configPath,
outFile,
rootNames,
target
} = request;
util.log(">>> compile start", {
rootNames,
type: CompilerRequestType[request.type]
});
// This will recursively analyse all the code for other imports,
// requesting those from the privileged side, populating the in memory
// cache which will be used by the host, before resolving.
const resolvedRootModules = await processImports(
rootNames.map(rootName => [rootName, rootName])
);
// When a programme is emitted, TypeScript will call `writeFile` with
// each file that needs to be emitted. The Deno compiler host delegates
// this, to make it easier to perform the right actions, which vary
// based a lot on the request. For a `Compile` request, we need to
// cache all the files in the privileged side if we aren't bundling,
// and if we are bundling we need to enrich the bundle and either write
// out the bundle or log it to the console.
const state: WriteFileState = {
type: request.type,
bundle,
host: undefined,
outFile,
rootNames
};
const writeFile = createWriteFile(state);
const host = (state.host = new Host({
bundle,
target,
writeFile
}));
let diagnostics: readonly ts.Diagnostic[] | undefined;
// if there is a configuration supplied, we need to parse that
if (config && config.length && configPath) {
const configResult = host.configure(configPath, config);
diagnostics = processConfigureResponse(configResult, configPath);
}
let emitSkipped = true;
// if there was a configuration and no diagnostics with it, we will continue
// to generate the program and possibly emit it.
if (!diagnostics || (diagnostics && diagnostics.length === 0)) {
const options = host.getCompilationSettings();
const program = ts.createProgram({
rootNames,
options,
host,
oldProgram: TS_SNAPSHOT_PROGRAM
});
diagnostics = ts
.getPreEmitDiagnostics(program)
.filter(({ code }) => !ignoredDiagnostics.includes(code));
// We will only proceed with the emit if there are no diagnostics.
if (diagnostics && diagnostics.length === 0) {
if (bundle) {
// we only support a single root module when bundling
assert(resolvedRootModules.length === 1);
// warning so it goes to stderr instead of stdout
console.warn(`Bundling "${resolvedRootModules[0]}"`);
setRootExports(program, resolvedRootModules[0]);
}
const emitResult = program.emit();
emitSkipped = emitResult.emitSkipped;
// emitResult.diagnostics is `readonly` in TS3.5+ and can't be assigned
// without casting.
diagnostics = emitResult.diagnostics;
}
}
const result: CompileResult = {
emitSkipped,
diagnostics: diagnostics.length
? fromTypeScriptDiagnostic(diagnostics)
: undefined
};
globalThis.postMessage(result);
util.log("<<< compile end", {
rootNames,
type: CompilerRequestType[request.type]
});
break;
}
case CompilerRequestType.RuntimeCompile: {
// `RuntimeCompile` are requests from a runtime user, both compiles and
// bundles. The process is similar to a request from the privileged
// side, but also returns the output to the on message.
const { rootName, sources, options, bundle, target } = request;
util.log(">>> runtime compile start", {
rootName,
bundle,
sources: sources ? Object.keys(sources) : undefined
});
const resolvedRootName = sources
? rootName
: resolveModules([rootName])[0];
const rootNames = sources
? processLocalImports(sources, [[resolvedRootName, resolvedRootName]])
: await processImports([[resolvedRootName, resolvedRootName]]);
const state: WriteFileState = {
type: request.type,
bundle,
host: undefined,
rootNames,
sources,
emitMap: {},
emitBundle: undefined
};
const writeFile = createWriteFile(state);
const host = (state.host = new Host({
bundle,
target,
writeFile
}));
const compilerOptions = [defaultRuntimeCompileOptions];
if (options) {
compilerOptions.push(convertCompilerOptions(options));
}
if (bundle) {
compilerOptions.push(defaultBundlerOptions);
}
host.mergeOptions(...compilerOptions);
const program = ts.createProgram({
rootNames,
options: host.getCompilationSettings(),
host,
oldProgram: TS_SNAPSHOT_PROGRAM
});
if (bundle) {
setRootExports(program, rootNames[0]);
}
const diagnostics = ts
.getPreEmitDiagnostics(program)
.filter(({ code }) => !ignoredDiagnostics.includes(code));
const emitResult = program.emit();
assert(emitResult.emitSkipped === false, "Unexpected skip of the emit.");
const result = [
diagnostics.length
? fromTypeScriptDiagnostic(diagnostics).items
: undefined,
bundle ? state.emitBundle : state.emitMap
];
globalThis.postMessage(result);
assert(state.emitMap);
util.log("<<< runtime compile finish", {
rootName,
sources: sources ? Object.keys(sources) : undefined,
bundle,
emitMap: Object.keys(state.emitMap)
});
break;
}
case CompilerRequestType.RuntimeTranspile: {
const result: Record<string, TranspileOnlyResult> = {};
const { sources, options } = request;
const compilerOptions = options
? Object.assign(
{},
defaultTranspileOptions,
convertCompilerOptions(options)
)
: defaultTranspileOptions;
for (const [fileName, inputText] of Object.entries(sources)) {
const { outputText: source, sourceMapText: map } = ts.transpileModule(
inputText,
{
fileName,
compilerOptions
}
);
result[fileName] = { source, map };
}
globalThis.postMessage(result);
break;
}
default:
util.log(
`!!! unhandled CompilerRequestType: ${
(request as CompilerRequest).type
} (${CompilerRequestType[(request as CompilerRequest).type]})`
);
}
// The compiler isolate exits after a single message.
globalThis.close();
}
async function wasmCompilerOnMessage({
data: binary
}: {
data: string;
}): Promise<void> {
const buffer = util.base64ToUint8Array(binary);
// @ts-ignore
const compiled = await WebAssembly.compile(buffer);
util.log(">>> WASM compile start");
const importList = Array.from(
// @ts-ignore
new Set(WebAssembly.Module.imports(compiled).map(({ module }) => module))
);
const exportList = Array.from(
// @ts-ignore
new Set(WebAssembly.Module.exports(compiled).map(({ name }) => name))
);
globalThis.postMessage({ importList, exportList });
util.log("<<< WASM compile end");
// The compiler isolate exits after a single message.
globalThis.close();
}
function bootstrapTsCompilerRuntime(): void {
bootstrapWorkerRuntime("TS");
globalThis.onmessage = tsCompilerOnMessage;
}
function bootstrapWasmCompilerRuntime(): void {
bootstrapWorkerRuntime("WASM");
globalThis.onmessage = wasmCompilerOnMessage;
}
Object.defineProperties(globalThis, {
bootstrapWasmCompilerRuntime: {
value: bootstrapWasmCompilerRuntime,
enumerable: false,
writable: false,
configurable: false
},
bootstrapTsCompilerRuntime: {
value: bootstrapTsCompilerRuntime,
enumerable: false,
writable: false,
configurable: false
}
});