47 lines
1.8 KiB
Plaintext
47 lines
1.8 KiB
Plaintext
import os from "os";
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import path from "path";
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import { promises as fs } from "fs";
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export async function writeAppTypeDeclarations({ baseDir, imageImportsEnabled, hasPagesDir, isAppDirEnabled }) {
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// Reference `next` types
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const appTypeDeclarations = path.join(baseDir, "next-env.d.ts");
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// Defaults EOL to system default
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let eol = os.EOL;
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let currentContent;
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try {
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currentContent = await fs.readFile(appTypeDeclarations, "utf8");
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// If file already exists then preserve its line ending
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const lf = currentContent.indexOf("\n", /* skip first so we can lf - 1 */ 1);
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if (lf !== -1) {
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if (currentContent[lf - 1] === "\r") {
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eol = "\r\n";
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} else {
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eol = "\n";
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}
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}
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} catch {}
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/**
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* "Triple-slash directives" used to create typings files for Next.js projects
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* using Typescript .
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*
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* @see https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html
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*/ const directives = [
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// Include the core Next.js typings.
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'/// <reference types="next" />'
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];
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if (imageImportsEnabled) {
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directives.push('/// <reference types="next/image-types/global" />');
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}
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if (isAppDirEnabled && hasPagesDir) {
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directives.push('/// <reference types="next/navigation-types/compat/navigation" />');
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}
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// Push the notice in.
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directives.push("", "// NOTE: This file should not be edited", "// see https://nextjs.org/docs/basic-features/typescript for more information.");
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const content = directives.join(eol) + eol;
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// Avoids an un-necessary write on read-only fs
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if (currentContent === content) {
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return;
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}
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await fs.writeFile(appTypeDeclarations, content);
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}
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//# sourceMappingURL=writeAppTypeDeclarations.js.map |