WIP

TODO: restrict to `main`.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

.github/workflows/nano-server.yml

@@ -0,0 +1,29 @@
+name: Windows Nano Server tests
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - mimalloc-and-nano-server
+
+env:
+  DEVELOPER: 1
+
+jobs:
+  test-nano-server:
+    runs-on: windows-2022
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: git-for-windows/setup-git-for-windows-sdk@v1
+      - name: build Git
+        shell: bash
+        run: make -j15
+
+        # we copy this local so it can get included in the docker file
+      - name: copy windbg local
+        run: |
+          xcopy "C:/Program Files (x86)/Windows Kits/10/Debuggers/x64" ./dbg64 /s /e /h
+
+      - name: run nanoserver test
+        run: docker build .github/workflows/nanoserver-test

.github/workflows/nano-server/Dockerfile

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+FROM mcr.microsoft.com/powershell:nanoserver-1809
+USER ContainerAdministrator
+
+# Folder previously copied from C:/Program Files (x86)/Windows Kits/10/Debuggers/x64
+COPY ["dbg64", "C:/dbg"]
+## multiple alternatives to the  copy in a zip and use tar to unzip, or curl and unzip, etc.
+COPY ["git.exe","*.dll", "scalar.exe", "C:/test/"]
+COPY run-test.ps1 C:/
+
+WORKDIR C:/
+RUN pwsh.exe run-tests.ps1

.github/workflows/nano-server/run-tests.ps1

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+# For each ecectuable to test pick some no-operation set of flags/subcommands
+# or something that should quickly result in an error with known exit code
+# that is not a negative 32 bit number, and set the expected return code appropriately.
+
+# Only test exes that could be expected to run in a UI less environment.
+
+# ( Excutable path, arguments, expected return code )
+# also note space is required before close paren (a powershell quirk when defining nested arrrays like this)
+$executables_to_test = @(
+    ('C:\test\git.exe', '', 1 ),
+    ('C:\test\scalar.exe', 'version', 0 )
+)
+
+foreach ($executable in $executables_to_test)
+{
+    Write-Output "Now testing $($executable[0])"
+    &$executable[0] $executable[1]
+    if ($LASTEXITCODE -ne $executable[2]) {
+        # if we failed, run the debugger to find out what function or DLL could not be found
+        # and then exit the script with failure The missing DLL or EXE will be referenced near
+        # the end of the output
+
+        # Set a flag to havbe debugger show loader stub dianostics.
+        C:\dbg\gflags -i $executable[0] +SLS
+
+        C:\dbg\cdb.exe -c "g" -c "q" $executable[0] $executable[1]
+
+        exit 1
+    }
+}
+
+exit 0