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rolldown.deno.ts
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269 lines (230 loc) · 7.05 KB
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// oxlint-disable
// vibecode resolver
// based on: https://github.com/denoland/deno-rolldown-plugin
import {
type Loader,
type LoadResponse,
MediaType,
RequestedModuleType,
ResolutionMode,
Workspace,
type WorkspaceOptions
} from "@deno/loader";
import { fromFileUrl } from "@std/path";
const MARegex = /.*/;
type Module = {
specifier: string;
code: string;
};
/** Options for creating the Deno plugin. */
export interface DenoPluginOptions extends WorkspaceOptions {
/** Entry points for the build (optional, can be provided in buildStart) */
entrypoints?: string[];
/**
* Patterns to treat as external when Deno loader can't resolve them.
* Useful for npm packages that should remain external.
*/
externalPatterns?: (string | RegExp)[];
}
export type BuildStartOptions = {
input?: string | string[] | Record<string, string>;
};
export type ResolveIdOptions = {
kind: "import-statement" | "dynamic-import" | "require-call";
};
export interface DenoPlugin extends Disposable {
name: string;
buildStart(options?: BuildStartOptions): Promise<void>;
resolveId: {
filter: { id: RegExp };
handler(
source: string,
importer: string | undefined,
options: ResolveIdOptions
): Promise<string | { id: string; external: boolean } | null | undefined>;
};
load: {
filter: { id: RegExp };
handler(id: string): string | undefined;
};
}
function isBareSpecifier(source: string): boolean {
return !(
source.startsWith(".") ||
source.startsWith("/") ||
source.startsWith("file:") ||
source.startsWith("http:") ||
source.startsWith("https:") ||
source.startsWith("npm:") ||
source.startsWith("jsr:") ||
source.startsWith("node:")
);
}
/**
* Creates a deno plugin for use with rolldown.
* @returns The plugin.
*/
export function deno(pluginOptions: DenoPluginOptions = {}): DenoPlugin {
let loader: Loader | undefined;
let primaryEntrypoint: string | undefined;
const loads = new Map<string, Promise<LoadResponse | undefined>>();
const modules = new Map<string, Module | undefined>();
return {
name: "deno-plugin",
[Symbol.dispose]: () => {
if (loader && typeof loader[Symbol.dispose] === "function") {
loader[Symbol.dispose]();
}
},
buildStart: async (options) => {
let inputs: string[] = [];
if (options?.input != null) {
const { input } = options;
if (Array.isArray(input)) {
inputs = input;
} else if (typeof input === "object") {
inputs = Object.values(input);
} else if (typeof input === "string") {
inputs = [input];
}
} else if (pluginOptions.entrypoints?.length) {
inputs = pluginOptions.entrypoints;
}
if (inputs.length === 0) return;
[primaryEntrypoint] = inputs;
const workspace = new Workspace({ ...pluginOptions });
loader = await workspace.createLoader();
await loader.addEntrypoints(inputs);
},
resolveId: {
filter: { id: MARegex },
handler: async (source, importer, options) => {
if (!loader) {
throw new Error("Deno loader not initialized. Make sure buildStart was called.");
}
const resolutionMode = resolveKindToResolutionMode(options.kind);
const normalizedImporter = importer != null ? (modules.get(importer)?.specifier ?? importer) : undefined;
let resolvedSpecifier: string | undefined;
try {
resolvedSpecifier = await loader.resolve(source, normalizedImporter, resolutionMode);
} catch (error: unknown) {
if ((error as { code?: string })?.code !== "ERR_MODULE_NOT_FOUND") {
throw error;
}
}
if (resolvedSpecifier === undefined && isBareSpecifier(source)) {
if (primaryEntrypoint) {
try {
resolvedSpecifier = await loader.resolve(source, primaryEntrypoint, resolutionMode);
} catch {}
}
if (resolvedSpecifier === undefined) {
try {
resolvedSpecifier = await loader.resolve(source, undefined, resolutionMode);
} catch {}
}
}
if (resolvedSpecifier === undefined) {
if (pluginOptions.externalPatterns) {
for (const pattern of pluginOptions.externalPatterns) {
if (typeof pattern === "string") {
if (source === pattern || source.startsWith(`${pattern}/`)) {
return { id: source, external: true };
}
} else if (pattern.test(source)) {
return { id: source, external: true };
}
}
}
if (isBareSpecifier(source)) {
return { id: source, external: true };
}
return;
}
let loadPromise = loads.get(resolvedSpecifier);
if (!loadPromise) {
loadPromise = loader.load(resolvedSpecifier, RequestedModuleType.Default);
loads.set(resolvedSpecifier, loadPromise);
}
const result = await loadPromise;
if (!result) {
modules.set(resolvedSpecifier, undefined);
return resolvedSpecifier;
}
if (result.kind === "external") {
return { id: result.specifier, external: true };
}
const ext = mediaTypeToExtension(result.mediaType);
let { specifier } = result;
if (!specifier.endsWith(ext)) {
specifier += `.rolldown${ext}`;
}
if (specifier.startsWith("file:///")) {
specifier = fromFileUrl(specifier);
}
modules.set(specifier, {
specifier: result.specifier,
code: new TextDecoder().decode(result.code)
});
return specifier;
}
},
load: {
filter: { id: MARegex },
handler: (id) => {
return modules.get(id)?.code;
}
}
};
}
function mediaTypeToExtension(mediaType: MediaType): string {
switch (mediaType) {
case MediaType.JavaScript:
return ".js";
case MediaType.Mjs:
return ".mjs";
case MediaType.Cjs:
return ".cjs";
case MediaType.Jsx:
return ".jsx";
case MediaType.TypeScript:
return ".ts";
case MediaType.Mts:
return ".mts";
case MediaType.Cts:
return ".cts";
case MediaType.Dts:
return ".d.ts";
case MediaType.Dmts:
return ".d.mts";
case MediaType.Dcts:
return ".d.cts";
case MediaType.Tsx:
return ".tsx";
case MediaType.Css:
return ".css";
case MediaType.Json:
return ".json";
case MediaType.Html:
return ".html";
case MediaType.Sql:
return ".sql";
case MediaType.Wasm:
return ".wasm";
case MediaType.SourceMap:
return ".map";
default:
return "";
}
}
function resolveKindToResolutionMode(kind: string): ResolutionMode {
switch (kind) {
case "import-statement":
case "dynamic-import":
return ResolutionMode.Import;
case "require-call":
return ResolutionMode.Require;
default:
throw new Error(`not implemented: ${kind}`);
}
}