Fix #407 worktree has .git file not folder.

src/GitUtils.ps1

@@ -31,6 +31,14 @@ function Get-GitDirectory {
                 return $gitDirPath
             }
 
+            # Handle the worktree case where .git is a file
+            if (Test-Path -LiteralPath $gitDirPath -PathType Leaf) {
+                $gitDirPath = Invoke-Utf8ConsoleCommand { git rev-parse --git-dir 2>$null }
+                if ($gitDirPath) {
+                    return $gitDirPath
+                }
+            }
+
             $headPath = Join-Path $currentDir.FullName HEAD
             if (Test-Path -LiteralPath $headPath -PathType Leaf) {
                 $refsPath = Join-Path $currentDir.FullName refs

test/Get-GitDirectory.Tests.ps1

@@ -3,6 +3,7 @@
 Describe 'Get-GitDiretory Tests' {
     Context "Test normal repository" {
         BeforeAll {
+            [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssigments', '')]
             $origPath = Get-Location
         }
         AfterAll {
@@ -29,8 +30,47 @@ Describe 'Get-GitDiretory Tests' {
         }
     }
 
-    Context "Test bare repository" {
+    Context 'Test worktree' {
+        BeforeEach {
+            [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssigments', '')]
+            $origPath = Get-Location
+            $temp = [System.IO.Path]::GetTempPath()
+            $repoPath = Join-Path $temp ([IO.Path]::GetRandomFileName())
+            $worktreePath = Join-Path $temp ([IO.Path]::GetRandomFileName())
+
+            git init $repoPath
+            Set-Location $repoPath
+            'foo' > .\README.md
+            git add .\README.md
+            # Quoting is a hack due to our use of the global:git function and how it converts args for invoke-expression
+            git commit -m "`"initial commit.`""
+
+            if (Test-Path $worktreePath) {
+                Remove-Item $worktreePath -Recurse -Force
+            }
+            New-Item $worktreePath -ItemType Directory > $null
+            git worktree add -b test-worktree $worktreePath master
+        }
+        AfterEach {
+            Set-Location $origPath
+            if (Test-Path $repoPath) {
+                Remove-Item $repoPath -Recurse -Force
+            }
+            if (Test-Path $worktreePath) {
+                Remove-Item $worktreePath -Recurse -Force
+            }
+        }
+
+        It 'Returns the correct dir when under a worktree' {
+            Set-Location $worktreePath
+            $worktreeBaseName = Split-Path $worktreePath -Leaf
+            Get-GitDirectory | Should BeExactly (MakeGitPath $repoPath\.git\worktrees\$worktreeBaseName)
+        }
+    }
+
+    Context 'Test bare repository' {
         BeforeAll {
+            [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssigments', '')]
             $origPath = Get-Location
             $temp = [System.IO.Path]::GetTempPath()
             $bareRepoName = "test.git"

test/Shared.ps1

@@ -15,10 +15,15 @@ function global:git {
     }
 }
 
-# Force the posh-git prompt to be installed. Could be runnng on dev system where
-# user has customized the prompt.
-$module = Import-Module $moduleManifestPath -ArgumentList $true,$true -Force -PassThru
-
 function MakeNativePath([string]$Path) {
     $Path -replace '\\|/', [System.IO.Path]::DirectorySeparatorChar
 }
+
+function MakeGitPath([string]$Path) {
+    $Path -replace '\\', '/'
+}
+
+# Force the posh-git prompt to be installed. Could be runnng on dev system where
+# user has customized the prompt.
+[System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssigments', '')]
+$module = Import-Module $moduleManifestPath -ArgumentList $true,$true -Force -PassThru

test/TabExpansion.Tests.ps1

@@ -119,6 +119,7 @@ Describe 'TabExpansion Tests' {
     }
     Context 'Add/Reset/Checkout TabExpansion Tests' {
         BeforeEach {
+            [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssigments', '')]
             $origPath = Get-Location
             $temp = [System.IO.Path]::GetTempPath()
             $repoPath = Join-Path $temp ([IO.Path]::GetRandomFileName())