Merge pull request #2209 from shoop/patch-1

Add example Powershell for Bamboo Windows build hosts

Author: asbjornu

docs/input/docs/build-server-support/build-server/bamboo.md

@@ -5,11 +5,14 @@ Title: Bamboo
 
 If you use Bamboo then you will have to use GitVersion from the command line, as
 there is no actively supported app.  You can use the "Inject Bamboo Variables"
-task to read the GitVersion output back into Bamboo.  Below is a Linux example
+task to read the GitVersion output back into Bamboo. Below are two examples
 using the [.NET Core GitVersion global tool](https://www.nuget.org/packages/GitVersion.Tool/).
 
 ## Example
 
+The first script can be run on a Linux build host, the second script can be run on
+a Windows build host using Powershell. The build only needs one of the two.
+
 ### Task: Script
 
 **Script body**
@@ -19,6 +22,14 @@ using the [.NET Core GitVersion global tool](https://www.nuget.org/packages/GitV
 sed -i '1d;26d;s/  //;s/"//g;s/,//;s/:/=/' gitversion.txt
 ```
 
+### Task: Script
+
+**Script body**
+
+```powershell
+(dotnet gitversion | ConvertFrom-Json).PSObject.Properties | ForEach-Object { Write-Output "$($_.Name)=$($_.Value)" } | Out-File -Encoding UTF8 -FilePath gitversion.txt
+```
+
 ### Task: Inject Bamboo variables Configuration
 
 **Required Properties**