Improve error handling for graphql

src/GitlabCli/GitlabCli.psd1

@@ -1,5 +1,5 @@
 @{
-    ModuleVersion = '1.118.1'
+    ModuleVersion = '1.118.2'
 
     RequiredModules = @('powershell-yaml')
 
@@ -27,8 +27,7 @@
             ExternalModuleDependencies = @('powershell-yaml')
             ReleaseNotes =
 @'
-* bugfix for missing pipeline bridges
-* add pagination for Get-GitlabJob
+* improve handling of graphql errors
 '@
         }
     }

src/GitlabCli/GraphQL.psm1

@@ -1,22 +1,25 @@
 # https://docs.gitlab.com/ee/api/graphql/
 function Invoke-GitlabGraphQL {
+    [CmdletBinding(SupportsShouldProcess)]
     param(
-        [Parameter(Position=0, Mandatory=$true)]
+        [Parameter(Position=0, Mandatory)]
         [string]
         $Query,
 
         [Parameter()]
         [string]
-        $SiteUrl,
-
-        [Parameter()]
-        [switch]
-        $WhatIf
+        $SiteUrl
     )
 
     $Body = @{
         query = $Query
     }
-
-    Invoke-GitlabApi POST 'graphql' -Api '' -Body $Body -SiteUrl $SiteUrl -WhatIf:$WhatIf | Select-Object -ExpandProperty data | New-WrapperObject
+    if ($PSCmdlet.ShouldProcess("graphql query", "$($Body | ConvertTo-Json -Depth 100)")) {
+        $Result = Invoke-GitlabApi POST 'graphql' -Api '' -Body $Body -SiteUrl $SiteUrl
+        if ($Result.data) {
+            $Result.data | New-WrapperObject
+        } else {
+            throw "GraphQL query ($Query) failed, result: $($Result | ConvertTo-Json -Depth 100)"
+        }
+    }
 }