mirror of
https://github.com/denoland/deno.git
synced 2024-12-25 08:39:09 -05:00
97 lines
3.5 KiB
TypeScript
97 lines
3.5 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
|
|
|
|
import { bundleLoader } from "./compiler_bootstrap.ts";
|
|
import {
|
|
assert,
|
|
commonPath,
|
|
normalizeString,
|
|
CHAR_FORWARD_SLASH
|
|
} from "./util.ts";
|
|
|
|
/** Local state of what the root exports are of a root module. */
|
|
let rootExports: string[] | undefined;
|
|
|
|
/** Take a URL and normalize it, resolving relative path parts. */
|
|
function normalizeUrl(rootName: string): string {
|
|
const match = /^(\S+:\/{2,3})(.+)$/.exec(rootName);
|
|
if (match) {
|
|
const [, protocol, path] = match;
|
|
return `${protocol}${normalizeString(
|
|
path,
|
|
false,
|
|
"/",
|
|
code => code === CHAR_FORWARD_SLASH
|
|
)}`;
|
|
} else {
|
|
return rootName;
|
|
}
|
|
}
|
|
|
|
/** Given a root name, contents, and source files, enrich the data of the
|
|
* bundle with a loader and re-export the exports of the root name. */
|
|
export function buildBundle(
|
|
rootName: string,
|
|
data: string,
|
|
sourceFiles: readonly ts.SourceFile[]
|
|
): string {
|
|
// when outputting to AMD and a single outfile, TypeScript makes up the module
|
|
// specifiers which are used to define the modules, and doesn't expose them
|
|
// publicly, so we have to try to replicate
|
|
const sources = sourceFiles.map(sf => sf.fileName);
|
|
const sharedPath = commonPath(sources);
|
|
rootName = normalizeUrl(rootName)
|
|
.replace(sharedPath, "")
|
|
.replace(/\.\w+$/i, "");
|
|
let instantiate: string;
|
|
if (rootExports && rootExports.length) {
|
|
instantiate = `const __rootExports = instantiate("${rootName}");\n`;
|
|
for (const rootExport of rootExports) {
|
|
if (rootExport === "default") {
|
|
instantiate += `export default __rootExports["${rootExport}"];\n`;
|
|
} else {
|
|
instantiate += `export const ${rootExport} = __rootExports["${rootExport}"];\n`;
|
|
}
|
|
}
|
|
} else {
|
|
instantiate = `instantiate("${rootName}");\n`;
|
|
}
|
|
return `${bundleLoader}\n${data}\n${instantiate}`;
|
|
}
|
|
|
|
/** Set the rootExports which will by the `emitBundle()` */
|
|
export function setRootExports(program: ts.Program, rootModule: string): void {
|
|
// get a reference to the type checker, this will let us find symbols from
|
|
// the AST.
|
|
const checker = program.getTypeChecker();
|
|
// get a reference to the main source file for the bundle
|
|
const mainSourceFile = program.getSourceFile(rootModule);
|
|
assert(mainSourceFile);
|
|
// retrieve the internal TypeScript symbol for this AST node
|
|
const mainSymbol = checker.getSymbolAtLocation(mainSourceFile);
|
|
if (!mainSymbol) {
|
|
return;
|
|
}
|
|
rootExports = checker
|
|
.getExportsOfModule(mainSymbol)
|
|
// .getExportsOfModule includes type only symbols which are exported from
|
|
// the module, so we need to try to filter those out. While not critical
|
|
// someone looking at the bundle would think there is runtime code behind
|
|
// that when there isn't. There appears to be no clean way of figuring that
|
|
// out, so inspecting SymbolFlags that might be present that are type only
|
|
.filter(
|
|
sym =>
|
|
!(
|
|
sym.flags & ts.SymbolFlags.Interface ||
|
|
sym.flags & ts.SymbolFlags.TypeLiteral ||
|
|
sym.flags & ts.SymbolFlags.Signature ||
|
|
sym.flags & ts.SymbolFlags.TypeParameter ||
|
|
sym.flags & ts.SymbolFlags.TypeAlias ||
|
|
sym.flags & ts.SymbolFlags.Type ||
|
|
sym.flags & ts.SymbolFlags.Namespace ||
|
|
sym.flags & ts.SymbolFlags.InterfaceExcludes ||
|
|
sym.flags & ts.SymbolFlags.TypeParameterExcludes ||
|
|
sym.flags & ts.SymbolFlags.TypeAliasExcludes
|
|
)
|
|
)
|
|
.map(sym => sym.getName());
|
|
}
|