dev python check

4 files changed, 81 insertions, 11 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); }
diff --git a/mongo-edu.js b/mongo-edu.js
index f6dc0ca..5693ee5 100644
--- a/mongo-edu.js
+++ b/mongo-edu.js
@@ -9,6 +9,7 @@
 var mdbvideos = require('./lib/login'),
     videoHandler = require('./lib/videos'),
     validate = require('./lib/validate'),
+    configure = require('./lib/configure'),
     path = require('path'),
     colors = require('colors'),
     inquirer = require('inquirer'),
@@ -16,6 +17,7 @@ var mdbvideos = require('./lib/login'),
         .usage('Usage: $0 [options]')
         .describe('d', 'download path').describe('u', 'email address')
         .describe('h', 'switch from videos (default) to handouts').boolean('h')
+        .describe('py', 'pass python').describe('py', 'python')
         .describe('cw', 'switch from wiki\'s video lists (default) to courseware').boolean('cw')
         .describe('cwd', 'same as --cw and dumps list of videos to file in -d').boolean('cwd')
         .describe('cc', 'get closed captions').boolean('cc')
@@ -39,7 +41,12 @@ exports.create = function start() {
 
     validate.init(argv, function (err, profile) {
         if (err !== null) { throw err; }
-        run(profile);
+
+        configure(argv, function conf(err) {
+            if (err !== null) { throw err; }
+            run(profile);
+        });
+
     });
 
     function run(profile) {
diff --git a/package.json b/package.json
index f422e38..de4e4bf 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "mongo-edu",
   "preferGlobal": true,
-  "version": "0.1.21",
+  "version": "0.1.22",
   "author": "Przemyslaw Pluta <przemyslawplutadev@gmail.com> (http://przemyslawpluta.com)",
   "description": "Select and download videos and handouts from university.mongodb.com courses",
   "main": "./mongo-edu",
@@ -31,19 +31,21 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "request": "~2.36.0",
-    "youtube-dl": "~1.3.6",
-    "colors": "~0.6.2",
-    "lodash": "~2.4.1",
     "cheerio": "~0.17.0",
+    "colors": "~0.6.2",
+    "filesize": "~2.0.3",
     "inquirer": "~0.5.1",
-    "progress": "~1.1.3",
+    "lodash": "~2.4.1",
     "mkdirp": "~0.5.0",
-    "optimist": "~0.6.1",
     "mv": "~2.0.0",
-    "unzip": "~0.1.9",
+    "optimist": "~0.6.1",
+    "progress": "~1.1.3",
+    "request": "~2.36.0",
     "request-progress": "~0.3.1",
-    "filesize": "~2.0.3"
+    "semver": "~2.3.0",
+    "unzip": "~0.1.9",
+    "which": "~1.0.5",
+    "youtube-dl": "~1.3.6"
   },
   "engines": {
     "node": ">= 0.8.x"