Initial hack at an Install action

src/Update/Program.cs

@@ -1,12 +1,15 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
 using Mono.Options;
+using Squirrel;
 
-namespace Update
+namespace Squirrel.Update
 {
     enum UpdateAction {
         Unset = 0, Install, Uninstall, Download, Update,
@@ -33,10 +36,10 @@ namespace Update
                 "Manages Squirrel packages",
                 "",
                 "Commands",
-                { "install=", "Install the app specified by the RELEASES file", v => { updateAction = UpdateAction.Install; target = v; } },
+                { "install=", "Install the app whose package is in the specified directory", v => { updateAction = UpdateAction.Install; target = v; } },
                 { "uninstall", "Uninstall the app the same dir as Update.exe", v => updateAction = UpdateAction.Uninstall},
                 { "download=", "Download the releases specified by the URL and write new results to stdout as JSON", v => { updateAction = UpdateAction.Download; target = v; } },
-                { "update", "Update the application to the latest remote version", v => updateAction = UpdateAction.Update },
+                { "update=", "Update the application to the latest remote version specified by URL", v => { updateAction = UpdateAction.Update; target = v; } },
                 "",
                 "Options:",
                 { "h|?|help", "Display Help and exit", _ => ShowHelp() },
@@ -49,13 +52,58 @@ namespace Update
                 ShowHelp();
             }
 
+            switch (updateAction) {
+            case UpdateAction.Install:
+                Install(silentInstall, target).Wait();
+                break;
+            case UpdateAction.Update:
+                Update(target).Wait();
+                break;
+            }
+
             return 0;
         }
 
-        static void ShowHelp()
+        public static async Task Install(bool silentInstall, string sourceDirectory = null)
+        {
+            sourceDirectory = sourceDirectory ?? Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+            var releasesPath = Path.Combine(sourceDirectory, "RELEASES"); 
+
+            if (!File.Exists(releasesPath)) {
+                var nupkgs = (new DirectoryInfo(sourceDirectory)).GetFiles()
+                    .Where(x => x.Name.EndsWith(".nupkg", StringComparison.OrdinalIgnoreCase))
+                    .Select(x => ReleaseEntry.GenerateFromFile(x.FullName));
+
+                ReleaseEntry.WriteReleaseFile(nupkgs, releasesPath);
+            }
+
+            var ourAppName = ReleaseEntry.ParseReleaseFile(releasesPath).First().PackageName;
+            using (var mgr = new UpdateManager(sourceDirectory, ourAppName, FrameworkVersion.Net45)) {
+                await mgr.FullInstall(silentInstall);
+            }
+        }
+
+        public static async Task Update(string updateUrl, string appName = null)
+        {
+            appName = appName ?? getAppNameFromDirectory();
+
+            using (var mgr = new UpdateManager(updateUrl, appName, FrameworkVersion.Net45)) {
+                var updateInfo = await mgr.CheckForUpdate(progress: x => Console.WriteLine(x / 3));
+                await mgr.DownloadReleases(updateInfo.ReleasesToApply, x => Console.WriteLine(33 + x / 3));
+                await mgr.ApplyReleases(updateInfo, x => Console.WriteLine(66 + x / 3));
+            }
+        }
+
+        public static void ShowHelp()
         {
             opts.WriteOptionDescriptions(Console.Out);
             Environment.Exit(0);
         }
+
+        static string getAppNameFromDirectory(string path = null)
+        {
+            path = path ?? Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+            return (new DirectoryInfo(path)).Name;
+        }
     }
 }

src/Update/Update.csproj

@@ -32,6 +32,28 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Microsoft.Web.XmlTransform">
+      <HintPath>..\..\packages\Microsoft.Web.Xdt.2.1.1\lib\net40\Microsoft.Web.XmlTransform.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil">
+      <HintPath>..\..\packages\Mono.Cecil.0.9.5.4\lib\net40\Mono.Cecil.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil.Mdb">
+      <HintPath>..\..\packages\Mono.Cecil.0.9.5.4\lib\net40\Mono.Cecil.Mdb.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil.Pdb">
+      <HintPath>..\..\packages\Mono.Cecil.0.9.5.4\lib\net40\Mono.Cecil.Pdb.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil.Rocks">
+      <HintPath>..\..\packages\Mono.Cecil.0.9.5.4\lib\net40\Mono.Cecil.Rocks.dll</HintPath>
+    </Reference>
+    <Reference Include="NuGet.Core, Version=2.8.50506.491, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\..\packages\NuGet.Core.2.8.2\lib\net40-Client\NuGet.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Splat">
+      <HintPath>..\..\packages\Splat.1.4.0\lib\Net45\Splat.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Xml.Linq" />
@@ -49,6 +71,12 @@
     <None Include="App.config" />
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Squirrel\Squirrel.csproj">
+      <Project>{1436e22a-fe3c-4d68-9a85-9e74df2e6a92}</Project>
+      <Name>Squirrel</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

src/Update/packages.config

@@ -1,4 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="Microsoft.Web.Xdt" version="2.1.1" targetFramework="net45" />
+  <package id="Mono.Cecil" version="0.9.5.4" targetFramework="net45" />
   <package id="Mono.Options" version="1.1" targetFramework="net45" />
+  <package id="NuGet.Core" version="2.8.2" targetFramework="net45" />
+  <package id="Splat" version="1.4.0" targetFramework="net45" />
 </packages>