last comments resolved.

images.CI/shebang-linter.ps1

@@ -0,0 +1,34 @@
+$ErrorActionPreference = "Stop"
+
+function Validate-Scripts {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string[]]$Path,
+        [Parameter(Mandatory=$true)]
+        [string]$ExpectedShebang
+    )
+    $ScriptWithoutShebangLine = @()
+    Get-ChildItem $path -Recurse -File -Filter "*.sh" | ForEach-Object {
+        $shebangLine = Get-Content -Path $($_.FullName) | Select-Object -First 1
+        if ($shebangLine -eq $ExpectedShebang) {
+            Write-Host "Pattern '$ExpectedShebang' found in '$($_.FullName)'"
+        }
+        else {
+            Write-Host "Pattern '$ExpectedShebang' not found in '$($_.FullName)'"
+            $ScriptWithoutShebangLine += $($_.FullName)
+        }
+    }
+    return $ScriptWithoutShebangLine
+}
+
+$PathUbuntu = "./images/linux/scripts"
+$PathMacOS = "./images/macos/provision"
+$ScriptsWithBrokenShebang = @()
+$ScriptsWithBrokenShebang += Validate-Scripts -Path $PathUbuntu -Pattern "#!/bin/bash -e"
+$ScriptsWithBrokenShebang += Validate-Scripts -Path $PathMacOS -Pattern "#!/bin/bash -e -o pipefail"
+if ($ScriptsWithBrokenShebang.Length -gt 0) {
+    $ScriptsWithBrokenShebang | ForEach-Object {
+        Write-Warning "The following script does not contain shebang: '$_'"
+    }
+    exit 1
+}