Fix crash while trying to update with identical current and target version

Fixes #50

Author: LordHepipud

lib/core/framework/Get-IcingaPowerShellModuleArchive.psm1

@@ -26,7 +26,14 @@ function Get-IcingaPowerShellModuleArchive()
 
                 if ($null -ne $CurrentVersion -And $CurrentVersion -eq $Tag) {
                     Write-Host ([string]::Format('Your "{0}" is already up-to-date', $ModuleName));
-                    return;
+                    return @{
+                        'DownloadUrl' = $DownloadUrl;
+                        'Version'     = $Tag;
+                        'Directory'   = '';
+                        'Archive'     = '';
+                        'ModuleRoot'  = (Get-IcingaFrameworkRootPath);
+                        'Installed'   = $FALSE;
+                    };
                 }
             }
         } else {
@@ -56,5 +63,6 @@ function Get-IcingaPowerShellModuleArchive()
         'Directory'   = $DownloadDirectory;
         'Archive'     = $DownloadDestination;
         'ModuleRoot'  = (Get-IcingaFrameworkRootPath);
+        'Installed'   = $TRUE;
     };
 }

lib/core/framework/Install-IcingaFrameworkPlugins.psm1

@@ -7,6 +7,12 @@ function Install-IcingaFrameworkPlugins()
     $RepositoryName = 'icinga-powershell-plugins';
     $Archive        = Get-IcingaPowerShellModuleArchive -DownloadUrl $PluginsUrl -ModuleName 'Icinga Plugins' -Repository $RepositoryName;
 
+    if ($Archive.Installed -eq $FALSE) {
+        return @{
+            'PluginUrl' = $Archive.DownloadUrl
+        };
+    }
+
     Write-Host ([string]::Format('Installing module into "{0}"', ($Archive.Directory)));
     Expand-IcingaZipArchive -Path $Archive.Archive -Destination $Archive.Directory | Out-Null;
 

lib/core/framework/Install-IcingaFrameworkUpdate.psm1

@@ -7,6 +7,12 @@ function Install-IcingaFrameworkUpdate()
     $RepositoryName = 'icinga-powershell-framework';
     $Archive        = Get-IcingaPowerShellModuleArchive -DownloadUrl $FrameworkUrl -ModuleName 'Icinga Framework' -Repository $RepositoryName;
 
+    if ($Archive.Installed -eq $FALSE) {
+        return @{
+            'PluginUrl' = $Archive.DownloadUrl
+        };
+    }
+
     Write-Host ([string]::Format('Installing module into "{0}"', ($Archive.Directory)));
     Expand-IcingaZipArchive -Path $Archive.Archive -Destination $Archive.Directory | Out-Null;