Detect Visual Studio versions on the fly

src/config.coffee

@@ -1,4 +1,5 @@
 path = require 'path'
+fs = require 'fs'
 
 module.exports =
   getHomeDirectory: ->
@@ -24,3 +25,21 @@ module.exports =
 
   isWin32: ->
     !!process.platform.match(/^win/)
+
+  isWindows64Bit: ->
+    fs.existsSync "C:\\Windows\\SysWow64\\Notepad.exe"
+
+  x86ProgramFilesDirectory: ->
+    process.env["ProgramFiles(x86)"] || process.env["ProgramFiles"]
+
+  isVs2010Installed: ->
+    return false unless isWin32()
+
+    vsPath = path.join x86ProgramFilesDirectory(), "Microsoft Visual Studio 10.0", "Common7", "IDE", "devenv.exe"
+    fs.existsSync vsPath
+
+  isVs2012Installed: ->
+    return false unless isWin32()
+
+    vsPath = path.join x86ProgramFilesDirectory(), "Microsoft Visual Studio 11.0", "Common7", "IDE", "devenv.exe"
+    fs.existsSync vsPath

src/installer.coffee

@@ -45,16 +45,23 @@ class Installer extends Command
       else
         process.stdout.write '\u2717\n'.red
         callback(stdout.red + stderr.red)
-
   installModule: (options, modulePath, callback) ->
     process.stdout.write "Installing #{modulePath} to #{@atomPackagesDirectory} "
 
+    vsArgs = null
+    if config.isWin32()
+      vsArgs = "--msvs_version=2010" if config.isVs2010Installed()
+      vsArgs = "--msvs_version=2012" if config.isVs2012Installed()
+
+      throw new Error("You must have either VS2010 or VS2012 installed") unless vsArgs
+
     installArgs = ['--userconfig', config.getUserConfigPath(), 'install']
     installArgs.push(modulePath)
     installArgs.push("--target=#{config.getNodeVersion()}")
     installArgs.push('--arch=ia32')
     installArgs.push('--silent') if options.argv.silent
-    installArgs.push('--msvs_version=2012') if config.isWin32()
+    installArgs.push(vsArgs) if vsArgs?
+
     env = _.extend({}, process.env, HOME: @atomNodeDirectory)
 
     installDirectory = temp.mkdirSync('apm-install-dir-')