/*---------------------------------------------------------------------------------------------

* Copyright (c) Microsoft Corporation. All rights reserved.

* Licensed under the MIT License. See License.txt in the project root for license information.

*--------------------------------------------------------------------------------------------*/

import { runCommandNoPty, CLIHost } from './commonUtils';

import { Log } from '../spec-utils/log';

import { FileHost } from '../spec-utils/pfs';

export async function findGitRootFolder(cliHost: FileHost | CLIHost, folderPath: string, output: Log) {

if (!('exec' in cliHost)) {

for (let current = folderPath, previous = ''; current !== previous; previous = current, current = cliHost.path.dirname(current)) {

if (await cliHost.isFile(cliHost.path.join(current, '.git', 'config'))) {

return current;

}

}

return undefined;

}

try {

// Preserves symlinked paths (unlike --show-toplevel).

const { stdout } = await runCommandNoPty({

exec: cliHost.exec,

cmd: 'git',

args: ['rev-parse', '--show-cdup'],

cwd: folderPath,

output,

});

const cdup = stdout.toString().trim();

return cliHost.path.resolve(folderPath, cdup);

} catch {

return undefined;

}

}