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

// Licensed under the MIT License.

import { getExecutable } from '../../common/process/internal/python';

import { ShellExecFunc } from '../../common/process/types';

import { traceError } from '../../logging';

import { copyPythonExecInfo, PythonExecInfo } from '../exec';

/**

* Find the filename for the corresponding Python executable.

*

* Effectively, we look up `sys.executable`.

*

* @param python - the information to use when running Python

* @param shellExec - the function to use to run Python

*/

export async function getExecutablePath(python: PythonExecInfo, shellExec: ShellExecFunc): Promise<string | undefined> {

try {

const [args, parse] = getExecutable();

const info = copyPythonExecInfo(python, args);

const argv = [info.command, ...info.args];

// Concat these together to make a set of quoted strings

const quoted = argv.reduce(

(p, c) => (p ? `${p} ${c.toCommandArgumentForPythonExt()}` : `${c.toCommandArgumentForPythonExt()}`),

'',

);

const result = await shellExec(quoted, { timeout: 15000 });

const executable = parse(result.stdout.trim());

if (executable === '') {

throw new Error(`${quoted} resulted in empty stdout`);

}

return executable;

} catch (ex) {

traceError(ex);

return undefined;

}

}