source: imaps-frontend/node_modules/find-up/index.js@ d565449

'use strict';
const path = require('path');
const locatePath = require('locate-path');
const pathExists = require('path-exists');

const stop = Symbol('findUp.stop');

module.exports = async (name, options = {}) => {
        let directory = path.resolve(options.cwd || '');
        const {root} = path.parse(directory);
        const paths = [].concat(name);

        const runMatcher = async locateOptions => {
                if (typeof name !== 'function') {
                        return locatePath(paths, locateOptions);
                }

                const foundPath = await name(locateOptions.cwd);
                if (typeof foundPath === 'string') {
                        return locatePath([foundPath], locateOptions);
                }

                return foundPath;
        };

        // eslint-disable-next-line no-constant-condition
        while (true) {
                // eslint-disable-next-line no-await-in-loop
                const foundPath = await runMatcher({...options, cwd: directory});

                if (foundPath === stop) {
                        return;
                }

                if (foundPath) {
                        return path.resolve(directory, foundPath);
                }

                if (directory === root) {
                        return;
                }

                directory = path.dirname(directory);
        }
};

module.exports.sync = (name, options = {}) => {
        let directory = path.resolve(options.cwd || '');
        const {root} = path.parse(directory);
        const paths = [].concat(name);

        const runMatcher = locateOptions => {
                if (typeof name !== 'function') {
                        return locatePath.sync(paths, locateOptions);
                }

                const foundPath = name(locateOptions.cwd);
                if (typeof foundPath === 'string') {
                        return locatePath.sync([foundPath], locateOptions);
                }

                return foundPath;
        };

        // eslint-disable-next-line no-constant-condition
        while (true) {
                const foundPath = runMatcher({...options, cwd: directory});

                if (foundPath === stop) {
                        return;
                }

                if (foundPath) {
                        return path.resolve(directory, foundPath);
                }

                if (directory === root) {
                        return;
                }

                directory = path.dirname(directory);
        }
};

module.exports.exists = pathExists;

module.exports.sync.exists = pathExists.sync;

module.exports.stop = stop;