Show upgrade as default action when newer version exists

package.json

@@ -26,7 +26,8 @@
     "roaster": "0.0.5",
     "jqueryui-browser": "1.10.2-1",
     "season": "0.7.0",
-    "humanize-plus": "1.1.0"
+    "humanize-plus": "1.1.0",
+    "semver": "1.1.4"
   },
   "devDependencies": {
     "biscotto": "0.0.11"

src/app/atom-package.coffee

@@ -18,6 +18,8 @@ class AtomPackage extends Package
   resolvedMainModulePath: false
   mainModule: null
 
+  getVersion: -> @metadata?.version ? '0.0.0'
+
   load: ->
     try
       @loadMetadata()

src/app/package-config-view.coffee

@@ -1,3 +1,4 @@
+semver = require 'semver'
 {$$, View} = require 'space-pen'
 requireWithGlobals 'bootstrap/js/bootstrap-dropdown', jQuery: require 'jquery'
 
@@ -20,9 +21,14 @@ class PackageConfigView extends View
           @div class: 'readme', outlet: 'readme'
 
   initialize: (@pack, @queue) ->
-    @versions.text("Version: #{@pack.version}")
     @name.text(@pack.name)
 
+    installedVersion = atom.getLoadedPackage(@pack.name)?.getVersion()
+    if installedVersion
+      @versions.text("Version: #{@pack.version} (#{installedVersion} installed)")
+    else
+      @versions.text("Version: #{@pack.version}")
+
     if @pack.descriptionHtml
       @description.html(@pack.descriptionHtml)
     else if @pack.description
@@ -65,8 +71,11 @@ class PackageConfigView extends View
     @updateInstallState()
 
   updateInstallState: ->
-    @installed = atom.packageExists(@pack.name)
-    if @installed
-      @action.text('Uninstall')
+    installedPackage = atom.getLoadedPackage(@pack.name)
+    if installedPackage
+      if semver.gt(@pack.version, installedPackage.getVersion())
+        @action.text('Upgrade')
+      else
+        @action.text('Uninstall')
     else
       @action.text('Install')

src/app/text-mate-package.coffee

@@ -24,6 +24,8 @@ class TextMatePackage extends Package
     @grammars = []
     @scopedProperties = []
 
+  getVersion: -> '0.0.0'
+
   load: ({sync}={}) ->
     if sync
       @loadGrammarsSync()