next/dist/lib/typescript/writeAppTypeDeclarations.js

The React Framework

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.writeAppTypeDeclarations = writeAppTypeDeclarations;
var _os = _interopRequireDefault(require("os"));
var _path = _interopRequireDefault(require("path"));
var _fs = require("fs");
function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
        default: obj
    };
}
async function writeAppTypeDeclarations(baseDir, imageImportsEnabled) {
    // Reference `next` types
    const appTypeDeclarations = _path.default.join(baseDir, "next-env.d.ts");
    // Defaults EOL to system default
    let eol = _os.default.EOL;
    let currentContent;
    try {
        currentContent = await _fs.promises.readFile(appTypeDeclarations, "utf8");
        // If file already exists then preserve its line ending
        const lf = currentContent.indexOf("\n", /* skip first so we can lf - 1 */ 1);
        if (lf !== -1) {
            if (currentContent[lf - 1] === "\r") {
                eol = "\r\n";
            } else {
                eol = "\n";
            }
        }
    } catch (err) {}
    const content = '/// <reference types="next" />' + eol + (imageImportsEnabled ? '/// <reference types="next/image-types/global" />' + eol : "") + eol + "// NOTE: This file should not be edited" + eol + "// see https://nextjs.org/docs/basic-features/typescript for more information." + eol;
    // Avoids an un-necessary write on read-only fs
    if (currentContent === content) {
        return;
    }
    await _fs.promises.writeFile(appTypeDeclarations, content);
}

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