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

// Licensed under the MIT License.

/**

* A representation of the information needed to run a Python executable.

*

* @prop command - the executable to execute in a new OS process

* @prop args - the full list of arguments with which to invoke the command

* @prop python - the command + the arguments needed just to invoke Python

* @prop pythonExecutable - the path the the Python executable

*/

export type PythonExecInfo = {

command: string;

args: string[];

python: string[];

pythonExecutable: string;

};

/**

* Compose Python execution info for the given executable.

*

* @param python - the path (or command + arguments) to use to invoke Python

* @param pythonArgs - any extra arguments to use when running Python

*/

export function buildPythonExecInfo(

python: string | string[],

pythonArgs?: string[],

pythonExecutable?: string,

): PythonExecInfo {

if (Array.isArray(python)) {

const args = python.slice(1);

if (pythonArgs) {

args.push(...pythonArgs);

}

return {

args,

command: python[0],

python: [...python],

pythonExecutable: pythonExecutable ?? python[python.length - 1],

};

}

return {

command: python,

args: pythonArgs || [],

python: [python],

pythonExecutable: python,

};

}

/**

* Create a copy, optionally adding to the args to pass to Python.

*

* @param orig - the object to copy

* @param extraPythonArgs - any arguments to add to the end of `orig.args`

*/

export function copyPythonExecInfo(orig: PythonExecInfo, extraPythonArgs?: string[]): PythonExecInfo {

const info = {

command: orig.command,

args: [...orig.args],

python: [...orig.python],

pythonExecutable: orig.pythonExecutable,

};

if (extraPythonArgs) {

info.args.push(...extraPythonArgs);

}

if (info.pythonExecutable === undefined) {

info.pythonExecutable = info.python[info.python.length - 1]; // Default case

}

return info;

}