add workaround helper for dev dependencies

.drone.yml

@@ -17,6 +17,8 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Invoke-FileLinter
         }"
@@ -27,6 +29,8 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Invoke-Linter
         }"
@@ -37,6 +41,8 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Invoke-UnitTest -ExcludeTag 'Integration'
         }"
@@ -52,6 +58,8 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Send-PRComment
         }"
@@ -65,6 +73,8 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Invoke-BuildState
         }"
@@ -88,11 +98,15 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Update-ModuleMeta -Verbose
         }"
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           New-BuildPackage -AdditionalPath './src/Rules' -Verbose
         }"
@@ -117,6 +131,8 @@ steps:
     commands:
       - |
         pwsh -NonInteractive -c "& {
+          Import-Module './tools/DevDependency.psm1' -ErrorAction 'Stop';
+          Invoke-FixDevDependency;
           Import-Module './src/DroneHelper.psd1' -ErrorAction 'Stop';
           Invoke-Publish -Verbose
         }"

tools/DevDependency.psm1

@@ -0,0 +1,64 @@
+function Invoke-FixDevDependency {
+    <#
+    .SYNOPSIS
+        Installs dev dependencies.
+
+    .DESCRIPTION
+        Invoke-FixDevDependency acts as workaround to load the dependencies needed to load the pwsh module.
+        This is just standalone version of the embedded `Invoke-InstallDependency` which can't be called
+        by the DroneHelper build pipeline itself.
+    #>
+
+    [CmdletBinding()]
+    param ()
+
+    process {
+        try {
+            $PSScriptParams = @{
+                Name               = 'PSScriptAnalyzer'
+                Scope              = 'CurrentUser'
+                RequiredVersion    = '1.20.0'
+                Force              = $true
+                SkipPublisherCheck = $true
+                AllowClobber       = $true
+                Verbose            = $VerbosePreference
+                ErrorAction        = 'Stop'
+            }
+            Install-Module @PSScriptParams
+
+            $PesterParams = @{
+                Name               = 'Pester'
+                Scope              = 'CurrentUser'
+                RequiredVersion    = '5.3.1'
+                Force              = $true
+                SkipPublisherCheck = $true
+                AllowClobber       = $true
+                Verbose            = $VerbosePreference
+                ErrorAction        = 'Stop'
+            }
+            Install-Module @PesterParams
+
+            $PoshParams = @{
+                Name               = 'posh-git'
+                Scope              = 'CurrentUser'
+                RequiredVersion    = '1.1.0'
+                Force              = $true
+                SkipPublisherCheck = $true
+                AllowClobber       = $true
+                Verbose            = $VerbosePreference
+                ErrorAction        = 'Stop'
+            }
+            Install-Module @PoshParams
+        }
+        catch {
+            $ExecParams = @{
+                Exception   = [System.Exception]::new(
+                    'Could not install required build dependencies!',
+                    $PSItem.Exception
+                )
+                ErrorAction = 'Stop'
+            }
+            Write-Error @ExecParams
+        }
+    }
+}