Ensure dot sourced script paths use correct case

.build/BuildFunctions/Get-FileMostRecentCommit.ps1

@@ -0,0 +1,29 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+. $PSScriptRoot\Test-PathCaseSensitive.ps1
+
+function Get-FileMostRecentCommit {
+    [CmdletBinding()]
+    [OutputType([DateTime])]
+    param (
+        [Parameter()]
+        [string]
+        $File
+    )
+
+    Write-Verbose "Get-FileMostRecentCommit called for file $File"
+
+    if (-not (Test-PathCaseSensitive $File)) {
+        Write-Error "Path case is not correct: $File"
+    }
+
+    try {
+        $commitTime = [DateTime]::Parse((git log -n 1 --format="%ad" --date=rfc $File))
+        Write-Verbose "Commit time $commitTime for file $File"
+        return $commitTime
+    } catch {
+        Write-Error "Failed to get commit time for file $File"
+        throw
+    }
+}

.build/BuildFunctions/Get-ScriptProjectMostRecentCommit.ps1

@@ -2,6 +2,7 @@
 # Licensed under the MIT License.
 
 . $PSScriptRoot\Get-EmbeddedFileList.ps1
+. $PSScriptRoot\Get-FileMostRecentCommit.ps1
 
 <#
 .SYNOPSIS
@@ -19,15 +20,13 @@ function Get-ScriptProjectMostRecentCommit {
 
     process {
         Write-Verbose "Get-ScriptProjectMostRecentCommit called for file $File"
-        $mostRecentCommit = [DateTime]::MinValue
-        if ([DateTime]::TryParse((git log -n 1 --format="%ad" --date=rfc $File), [ref] $mostRecentCommit)) {
-            Get-EmbeddedFileList $File | ForEach-Object {
-                Write-Verbose "Getting commit time for $_"
-                $commitTime = [DateTime]::Parse((git log -n 1 --format="%ad" --date=rfc $_))
-                if ($commitTime -gt $mostRecentCommit) {
-                    $mostRecentCommit = $commitTime
-                    Write-Host ("Changing commit time to: $($commitTime.ToString("yy.MM.dd.HHmm"))")
-                }
+        $mostRecentCommit = Get-FileMostRecentCommit $File
+        foreach ($embeddedFile in (Get-EmbeddedFileList $File)) {
+            Write-Verbose "Getting commit time for $embeddedFile"
+            $commitTime = Get-FileMostRecentCommit $embeddedFile
+            if ($commitTime -gt $mostRecentCommit) {
+                $mostRecentCommit = $commitTime
+                Write-Host ("Changing commit time to: $($commitTime.ToString("yy.MM.dd.HHmm"))")
             }
         }
 

.build/BuildFunctions/Test-PathCaseSensitive.ps1

@@ -0,0 +1,29 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+function Test-PathCaseSensitive {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true)]
+        [string]
+        $Path
+    )
+
+    if (-not (Test-Path $Path)) {
+        Write-Warning "Path does not exist: $Path"
+        return $false
+    }
+
+    $directoryName = [IO.Path]::GetDirectoryName($Path)
+    $fileName = [IO.Path]::GetFileName($Path)
+    $childItem = Get-ChildItem $directoryName -Filter $fileName
+    $actualPath = $childItem.FullName
+    if ($actualPath -ceq $Path) {
+        return $true
+    }
+
+    Write-Warning "Provided path: $Path"
+    Write-Warning "Actual path: $actualPath"
+    Write-Warning "Path case is not correct."
+    return $false
+}