// @flow
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import path from "path";
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import debounce from "lodash.debounce";
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import requireResolve from "resolve";
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const nativeRequireResolve = parseFloat(process.versions.node) >= 8.9;
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// $FlowIgnore
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import { createRequire } from "module";
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// $FlowIgnore
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const require = createRequire(import/*::(_)*/.meta.url); // eslint-disable-line
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export function resolve(
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dirname: string,
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moduleName: string,
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absoluteImports: boolean | string,
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): string {
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if (absoluteImports === false) return moduleName;
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let basedir = dirname;
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if (typeof absoluteImports === "string") {
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basedir = path.resolve(basedir, absoluteImports);
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}
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try {
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if (nativeRequireResolve) {
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return require.resolve(moduleName, {
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paths: [basedir],
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});
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} else {
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return requireResolve.sync(moduleName, { basedir });
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}
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} catch (err) {
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if (err.code !== "MODULE_NOT_FOUND") throw err;
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// $FlowIgnore
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throw Object.assign(
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new Error(`Failed to resolve "${moduleName}" relative to "${dirname}"`),
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{
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code: "BABEL_POLYFILL_NOT_FOUND",
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polyfill: moduleName,
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dirname,
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},
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);
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}
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}
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export function has(basedir: string, name: string) {
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try {
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if (nativeRequireResolve) {
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require.resolve(name, { paths: [basedir] });
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} else {
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requireResolve.sync(name, { basedir });
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}
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return true;
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} catch {
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return false;
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}
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}
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export function logMissing(missingDeps: Set<string>) {
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if (missingDeps.size === 0) return;
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const deps = Array.from(missingDeps)
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.sort()
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.join(" ");
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console.warn(
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"\nSome polyfills have been added but are not present in your dependencies.\n" +
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"Please run one of the following commands:\n" +
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`\tnpm install --save ${deps}\n` +
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`\tyarn add ${deps}\n`,
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);
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process.exitCode = 1;
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}
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let allMissingDeps = new Set();
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const laterLogMissingDependencies = debounce(() => {
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logMissing(allMissingDeps);
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allMissingDeps = new Set();
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}, 100);
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export function laterLogMissing(missingDeps: Set<string>) {
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if (missingDeps.size === 0) return;
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missingDeps.forEach(name => allMissingDeps.add(name));
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laterLogMissingDependencies();
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}
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