browserify: implement error checks, path checks, and support express

lib/bundle.js

@@ -1,6 +1,6 @@
 /**
  * Copyright (c) 2013 Craig Condon
- * Copyright (c) 2015 Jared Allard
+ * Copyright (c) 2015-2016 Jared Allard
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -23,43 +23,66 @@
  *
  **/
 var mdeps  = require("module-deps"),
-path       = require("path"),
-spawn      = require('child_process').spawn,
-fs         = require("fs"),
-through    = require("through"),
-async      = require("async"),
-browserify = require('browserify'),
-builtins   = require("builtins"),
-_log     = require("./log");
+    path       = require("path"),
+    spawn      = require('child_process').spawn,
+    fs         = require("fs"),
+    through    = require("through2"),
+    async      = require("async"),
+    browserify = require('browserify'),
+    builtins   = require("builtins"),
+    _log     = require("./log");
 
 /**
  * User browserify to create a "packed" file.
  *
- * @param {string} input - input file
- * @param {string} nc - node compiler dir
- * @param {function} complete - next function to call (async)
+ * @param {String} input - input file
+ * @param {String} nc - node compiler dir
+ * @param {Function} complete - next function to call (async)
  **/
 function bundle (input, nc, complete) {
   var bundlePath = path.join(nc, "lib", "nexe.js");
   var ws = fs.createWriteStream(bundlePath);
-  var proc = spawn('node', ['node_modules/browserify/bin/cmd.js', '--node', input ]);
+  var proc = spawn('node', [path.join(__dirname, '../', 'node_modules/browserify/bin/cmd.js'), '--node', input ]);
+
+  // TODO: Get path of nexe directory, and refer to it.
 
   proc.stdout.pipe(ws);
 
+  proc.on('error', function(err) {
+    console.error(err.toString('ascii'));
+    _log('error', 'Failed to invoke browserify');
+    process.exit(1);
+  })
+
+  proc.stderr.on('data', function(data) {
+    console.error(data.toString('ascii'));
+    _log('error', 'Browserify failed to launch');
+    process.exit(1);
+  });
+
   proc.on('close', function(code) {
-    console.log("browserify finished")
+    _log("Browserify finished");
   })
 
   ws.on('error', function(err) {
     console.log(err);
+    _log('error', 'Failed to save stdout to disk');
+    process.exit(1);
   })
 
   ws.on('close', function() {
     var source = fs.readFileSync(bundlePath, 'utf8');
     source = source.replace(/[^\x00-\x7F]/g, "");
-    fs.writeFileSync(bundlePath, source, 'utf8');
 
-    complete();
+    // write the source modified to nexe.js
+    fs.writeFile(bundlePath, source, 'utf8', function(err) {
+      if(err) {
+        _log('error', 'failed to save source');
+        process.exit(1);
+      }
+
+      complete();
+    });
   });
 }