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/*
* mongo-edu
*
* Copyright (c) 2014 Przemyslaw Pluta
* Licensed under the MIT license.
* https://github.com/przemyslawpluta/mongo-edu/blob/master/LICENSE
*/
var fs = require('fs'),
path = require('path'),
which = require('which');
module.exports = function configure(argv, callback) {
'use strict';
var python = argv.py || process.env.PYTHON || 'python',
isWin = /^win/.test(process.platform);
function checkPython() {
which(python, function whichTest(err) {
if (err !== null) {
//console.log('`which` failed', python, err);
if (isWin) { guessPython(); } else { failNoPython(); }
} else {
//console.log('`which` succeeded', python, execPath);
process.env.PYTHON = python;
callback(null);
}
});
}
function guessPython() {
console.log('Could not find "' + python + '". guessing location');
var rootDir = process.env.SystemDrive || 'C:\\', pythonPath;
if (rootDir[rootDir.length - 1] !== '\\') { rootDir += '\\'; }
pythonPath = path.resolve(rootDir, 'Python27', 'python.exe');
console.log('ensuring that file exists:', pythonPath);
fs.stat(pythonPath, function stat(err) {
if (err !== null) {
if (err.code === 'ENOENT') { failNoPython(); } else { callback(err); }
return;
}
python = pythonPath;
process.env.PYTHON = pythonPath;
callback(null);
});
}
function failNoPython() {
callback(new Error('Can\'t find Python executable "' + python + '", you can set the PYTHON env variable.'));
}
checkPython();
};
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