update build docs, set npm prefix on install

fix issue regarding response on fetching available
fix issue with build script causing a crash when github doesnt respond to downloads

.gitignore

@@ -3,7 +3,7 @@
 /.node-version
 node_modules
 /.idea
-NodistSetup.exe
+/build/NodistSetup**
 /build/staging
 /build/tmp
 /build/Nodist.nsi

BUILD.md

@@ -5,6 +5,45 @@ Moving forward as of 0.7.0 Nodist no longer installs like it had previously.
 Now an installer is generated from the build process. This document is going
 to overview the build process in the hope that it can then be scripted.
 
-## Dirty Overview of Steps
+## Preparation
 
-* 
+Before a build can be made the following software is needed.
+
+* Working Node at least 0.10.40
+* Working NPM at least 2.x
+* Install the NSIS Package
+  * Download here: http://nsis.sourceforge.net/Download
+  * I am using 3.0b2
+  * Install with the wizard
+* Install the NSIS Plugin AccessControl
+  * Download here: http://nsis.sourceforge.net/AccessControl_plug-in
+  * Extract ZIP File
+  * Copy `Plugin\AccessControl.dll` to `C:\Program Files x86\NSIS\Plugins\x86-ansi`
+  * Copy `Unicode\Plugin\AccessControl.dll` to `C:\Program Files x86\NSIS\Plugins\x86-unicode`
+
+## Build Process
+
+
+First run the build script to prepare the installer for compilation.
+
+```
+$ cd <NODIST_DEV_FOLDER>
+$ node build\build.js
+``
+
+Next compile the installer by opening NSIS and selecting the "Compile Scripts"
+option. Point the compiler to `<NODIST_DEV_FOLDER>\build\Nodist.nsi` this will
+start the compile process.
+
+Provided the process is successful the installer will be at
+`<NODIST_DEV_FOLDER>\build\NodistSetup.exe`
+
+Next, move the `NodistSetup.exe` to the final production name of
+`NodistSetup-v<VERSION>.exe` for example `NodistSetup-v0.7.0.exe`
+
+## Publishing
+
+Now to publish the new builds simply cut a release tag based on the code
+just used for the build here: https://github.com/marcelklehr/nodist/releases
+
+Attach the binary to the release.

build/Nodist.template.nsi

@@ -114,6 +114,8 @@ WriteRegExpandStr ${ENV_HKLM} NODE_PATH "$INSTDIR\bin\node_modules;%NODE_PATH%"
 SendMessage ${HWND_BROADCAST} ${WM_WININICHANGE} 0 "STR:Environment" /TIMEOUT=5000
 ; change the permssions on the install dir, since everyone needs ot write to it
 AccessControl::GrantOnFile "$INSTDIR" "(BU)" "FullAccess"
+; set the NPM prefix
+Exec '"$INSTDIR\node.exe" "$INSTDIR\bin\node_modules\npm\bin\npm-cli.js" config set prefix "$INSTDIR\bin"'
 SectionEnd
 
 ######################################################################

build/helper.js

@@ -50,17 +50,21 @@ exports.downloadFile = function downloadFile(url, dest, cb){
   var fileSize = 1;
   var req = request.get(url);
   req.on('response',function(res){
-    fileSize = Math.round(res.headers['content-length'] / 1024);
-    progress = new ProgressBar(
-      path.basename(dest) +
-      ' [:bar] :current/:total KiB :rate/Kbps :percent :etas',
-      {
-        complete: '=',
-        incomplete: ' ',
-        width: 15,
-        total: fileSize
-      }
-    );
+    if(res.statusCode !== 200){
+      cb(new Error('Failed to read response from ' + url));
+    } else {
+      fileSize = Math.round(res.headers['content-length'] / 1024);
+      progress = new ProgressBar(
+        path.basename(dest) +
+        ' [:bar] :current/:total KiB :rate/Kbps :percent :etas',
+        {
+          complete: '=',
+          incomplete: ' ',
+          width: 15,
+          total: fileSize
+        }
+      );
+    }
   });
   req.on('data',function(chunk){
     progress.tick(Math.round(chunk.length / 1024));

lib/nodist.js

@@ -267,7 +267,10 @@ nodist.prototype.fetchAvailable = function fetchAvailable(sourceUrl, name, cb){
         err.message = 'Could not list available ' + name + ' versions: ' +
           err.message;
       }
-      if(resp.statusCode !== 200){
+      if(!resp){
+        err = new Error('Could not read response for ' + sourceUrl);
+      }
+      if(!err && resp.statusCode !== 200){
         err = new Error(
           'Could not list available ' + name + ' versions: HTTP ' +
           resp.statusCode