fix(Git): use full Dependency.Target path when target doesn't exist (#169)

Supersedes #99 — that PR has been open since 2019 with no merge
activity, so filing a fresh one with the fixes applied.

## Problem

The `-Force` branch in `Git.ps1` used `Split-Path -Leaf` + `Join-Path
$PWD` to construct the target path. This breaks in two ways:

1. Absolute paths or multi-level targets (e.g. `C:\Temp\Repos\myrepo`,
`TestDrive:/PSDependPesterTest\buildhelpers`) are clobbered — only the
leaf is used and it lands in `$PWD` instead of the intended location.
2. When `-Force` is used without a `Dependency.Target`, `Split-Path`
throws because the input is empty.

## Fix

In the unresolvable-target `else` block, simply set `$Target =
$Dependency.Target` when it is non-empty. The existing `New-Item` call
at line 109 already handles directory creation for the `Install` action
— no duplication needed. When `Dependency.Target` is empty the previous
default-to-`$PWD` behavior is preserved.

## Changes

- `PSDepend/PSDependScripts/Git.ps1` — replaced the broken
`-Force`/`Split-Path` branch with a clean `$Dependency.Target`
assignment
- `Tests/PSModuleGallery.Type.Tests.ps1` — added a Pester regression
context that asserts `New-Item` is called with the full target path, not
just the leaf joined to `$PWD`

---------

Co-authored-by: Raúl Carboneras <rcarboneras@outlook.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 3 people

PSDepend/PSDependScripts/Git.ps1

@@ -93,8 +93,14 @@ if($Dependency.Target -and ($Target = (Get-Item $Dependency.Target -ErrorAction
 }
 else
 {
-    $Target = $PWD.Path
-    Write-Debug "Target defaulted to current dir: $Target"
+    if ($Dependency.Target) {
+        $Target = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($Dependency.Target)
+        Write-Debug "Target $($Dependency.Target) does not exist yet, will be created"
+    }
+    else {
+        $Target = $PWD.Path
+        Write-Debug "Target defaulted to current dir: $Target"
+    }
 }
 $RepoPath = Join-Path $Target $GitName
 $GottaInstall = $True

Tests/PSModuleGallery.Type.Tests.ps1

@@ -512,6 +512,24 @@ Describe "PSModuleGallery Type" -Tag 'Integration' {
             }
         }
 
+        Context 'Creates non-existent Target directory using full path' {
+            BeforeAll {
+                Mock Invoke-ExternalCommand {} -ModuleName PSDepend -ParameterFilter { $Arguments -contains 'checkout' -or $Arguments -contains 'clone' }
+                Mock Push-Location {} -ModuleName PSDepend
+                Mock Pop-Location {} -ModuleName PSDepend
+                Mock Set-Location {} -ModuleName PSDepend
+                Mock Test-Path { return $False } -ModuleName PSDepend -ParameterFilter { $Path -match 'buildhelpers' }
+                Mock New-Item { [pscustomobject]@{ FullName = $Path } } -ModuleName PSDepend
+                $null = Invoke-PSDepend @Verbose -Path "$TestDepends\git.depend.psd1" -Force
+            }
+
+            It 'Calls New-Item with a path containing the full target name, not just the leaf joined to $PWD' {
+                Should -Invoke New-Item -Times 1 -Exactly -Scope Context -ModuleName PSDepend -ParameterFilter {
+                    $Path -match 'buildhelpers' -and $Path -notmatch [regex]::Escape($PWD.Path)
+                }
+            }
+        }
+
         Context 'Tests dependency' {
             BeforeAll {
                 Mock New-Item { return $true } -ModuleName PSDepend