Using input: "." with programmatic API when eleventy setup is in another folder does not work

[MangelMaxime]

Operating system

macOS Sonoma 14.4

Eleventy

3.0.0-alpha.10

Describe the bug

When using the programmatic API, it seems like using input: "." does not work anymore relatively to the input directory.

I need to use to provide the absolute path instead.

import { dirname, filename } from 'dirname-filename-esm';

const __dirname = dirname(import.meta);

/** @param {import("@11ty/eleventy/src/UserConfig")} eleventyConfig */
export default function (eleventyConfig) {
    console.log("Custom Eleventy config file");

    // Configure Eleventy options to your liking
    return {
        dir: {
            // input: ".", // Does not work with programmatic usage
            input: __dirname,
            output: "_site",
        },
        dataTemplateEngine: "njk",
        htmlTemplateEngine: "njk",
        markdownTemplateEngine: "njk",
    };
};

Reproduction steps

1. Clone https://github.com/MangelMaxime/eleventy-reproduction-programmatic-api-bug-1
2. npm install
3. npx vitest and see that the test fails
4. Go to tests/fixtures/minimal/.eleventy.js and toggle the input configuration line
5. Run npx vitest again and see that the test passes

Expected behavior

Using input: "." as shown below should work:

/** @param {import("@11ty/eleventy/src/UserConfig")} eleventyConfig */
export default function (eleventyConfig) {
    console.log("Custom Eleventy config file");

    // Configure Eleventy options to your liking
    return {
        dir: {
            input: ".",
            output: "_site",
        },
        dataTemplateEngine: "njk",
        htmlTemplateEngine: "njk",
        markdownTemplateEngine: "njk",
    };
};

Reproduction URL

No response

Screenshots

No response