2 files changed, 62 insertions, 1 deletions
diff --git a/lib/configure.js b/lib/configure.js
new file mode 100644
index 0000000..9a5696a
--- /dev/null
+++ b/lib/configure.js
@@ -0,0 +1,61 @@
+/*
+ * 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();
+};
diff --git a/lib/videos.js b/lib/videos.js
index d4ce7b4..9d2328b 100644
--- a/lib/videos.js
+++ b/lib/videos.js
@@ -262,7 +262,7 @@ module.exports = {
 
         setOptions(argv);
 
-        if (isWin) { options = ['python', [file].concat(args)]; }
+        if (isWin) { options = [process.env.PYTHON, [file].concat(args)]; }
 
         execFile(options[0], options[1], function(err, stdout, stderr) {
             if (err !== null) { return callback(err); }