Merge pull request #762 from alefesta/powershell-installer

[Installation] - Improve Installation for Windows Users

docs/install.md

@@ -35,6 +35,17 @@ You can then install it globally on your system:
 sudo mv ./bin/dagger /usr/local/bin
 ```
 
+## Option 2 (Windows): Run a shell script
+
+From a terminal, run the following command:
+
+```shell
+curl https://releases.dagger.io/dagger/install.ps1 -OutFile install.ps1 ; ./install.ps1; rm install.ps1
+```
+
+We try to move the dagger binary under `C:\Windows\System32` but
+in case use missing the necessary permission we'll save everything under `<your home folder>/dagger`
+
 ## Option 3: Download a binary release
 
 Open your web browser to [the latest release](https://github.com/dagger/dagger/releases/latest).

install.ps1

@@ -0,0 +1,77 @@
+# param (
+#     [Parameter(Mandatory)] $PersonalToken  
+# )
+Clear-Host
+@"
+
+---------------------------------------------------------------------------------
+Author: Alessandro Festa
+Dagger Installation Utility  for Windows users
+---------------------------------------------------------------------------------
+
+"@
+
+# Since we are already authenticated we may directly download latest version.
+$name="dagger"
+$base="https://dagger-io.s3.amazonaws.com"
+function http_download {
+    $version=Get_Version
+    $version=$version -replace '[""]'
+    $version=$version -replace '\n'
+    $fileName="dagger_v" + $version + "_windows_amd64"
+    Clear-Host
+    $url = $base + "/" + $name + "/releases/" + $version + "/" + $fileName + ".zip"
+    write-host $url
+    Pause
+    
+
+    Invoke-WebRequest -Uri $url -OutFile $env:temp/$fileName.zip -ErrorAction Stop
+    Expand-Archive -Path $env:temp/$fileName.zip -DestinationPath $env:HOMEPATH/dagger -Force -ErrorVariable ProcessError;
+    If ($ProcessError)
+    {
+    Clear-Host
+@"
+Whoops apparently we had an issue in unzipping the file, please check
+you have the right permission to do so and try to unzip manually the file.
+Currently we saved Dagger at your temp folder.
+"@
+exit
+    } else {
+        Clear-Host
+    
+@"
+
+Thank You for downloading Dagger!
+
+-----------------------------------------------------
+Dagger has been saved at <YOUR HOME FOLDER>/dagger/
+Please add dagger.exe to your PATH in order to use it
+----------------------------------------------------
+
+"@
+    }
+
+}
+
+function Get_Version { 
+    $response = Invoke-RestMethod 'http://releases.dagger.io/dagger/latest_version' -Method 'GET'  -Body $body -ErrorAction SilentlyContinue -ErrorVariable DownloadError
+    If ($DownloadError)
+    {
+    Clear-Host
+@"
+
+---------------------------------------------------------------------------
+Houston we have a problem!
+
+Apparently we had an issue in downloading the file, please try again
+run the script and if it still fail please open an issue on the Dagger repo.
+----------------------------------------------------------------------------
+
+"@
+exit
+    }
+    return $response
+    
+}
+
+http_download