From ff0fee946ad5d905f95e40e135614b0b44009043 Mon Sep 17 00:00:00 2001
From: Kirtana Ashok <kiashok@microsoft.com>
Date: Thu, 30 May 2024 11:30:08 -0700
Subject: [PATCH] Move functions to containerd/platforms repo

Move functions needed only by containerd platform matcher
to cotnainerd/platforms repo

Signed-off-by: Kirtana Ashok <kiashok@microsoft.com>
---
 osversion/platform_compat_windows.go      | 35 ------------
 osversion/platform_compat_windows_test.go | 68 -----------------------
 2 files changed, 103 deletions(-)
 delete mode 100644 osversion/platform_compat_windows.go
 delete mode 100644 osversion/platform_compat_windows_test.go

diff --git a/osversion/platform_compat_windows.go b/osversion/platform_compat_windows.go
deleted file mode 100644
index f8d411ad7e..0000000000
--- a/osversion/platform_compat_windows.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package osversion
-
-// List of stable ABI compliant ltsc releases
-// Note: List must be sorted in ascending order
-var compatLTSCReleases = []uint16{
-	V21H2Server,
-}
-
-// CheckHostAndContainerCompat checks if given host and container
-// OS versions are compatible.
-// It includes support for stable ABI compliant versions as well.
-// Every release after WS 2022 will support the previous ltsc
-// container image. Stable ABI is in preview mode for windows 11 client.
-// Refer: https://learn.microsoft.com/en-us/virtualization/windowscontainers/deploy-containers/version-compatibility?tabs=windows-server-2022%2Cwindows-10#windows-server-host-os-compatibility
-func CheckHostAndContainerCompat(host, ctr OSVersion) bool {
-	// check major minor versions of host and guest
-	if host.MajorVersion != ctr.MajorVersion ||
-		host.MinorVersion != ctr.MinorVersion {
-		return false
-	}
-
-	// If host is < WS 2022, exact version match is required
-	if host.Build < V21H2Server {
-		return host.Build == ctr.Build
-	}
-
-	var supportedLtscRelease uint16
-	for i := len(compatLTSCReleases) - 1; i >= 0; i-- {
-		if host.Build >= compatLTSCReleases[i] {
-			supportedLtscRelease = compatLTSCReleases[i]
-			break
-		}
-	}
-	return ctr.Build >= supportedLtscRelease && ctr.Build <= host.Build
-}
diff --git a/osversion/platform_compat_windows_test.go b/osversion/platform_compat_windows_test.go
deleted file mode 100644
index bafa612d13..0000000000
--- a/osversion/platform_compat_windows_test.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package osversion
-
-import (
-	"testing"
-)
-
-// Test the platform compatibility of the different
-// OS Versions considering two ltsc container image
-// versions (ltsc2019, ltsc2022)
-func Test_PlatformCompat(t *testing.T) {
-	for testName, tc := range map[string]struct {
-		hostOs    uint16
-		ctrOs     uint16
-		shouldRun bool
-	}{
-		"RS5Host_ltsc2019": {
-			hostOs:    RS5,
-			ctrOs:     RS5,
-			shouldRun: true,
-		},
-		"RS5Host_ltsc2022": {
-			hostOs:    RS5,
-			ctrOs:     V21H2Server,
-			shouldRun: false,
-		},
-		"WS2022Host_ltsc2019": {
-			hostOs:    V21H2Server,
-			ctrOs:     RS5,
-			shouldRun: false,
-		},
-		"WS2022Host_ltsc2022": {
-			hostOs:    V21H2Server,
-			ctrOs:     V21H2Server,
-			shouldRun: true,
-		},
-		"Wind11Host_ltsc2019": {
-			hostOs:    V22H2Win11,
-			ctrOs:     RS5,
-			shouldRun: false,
-		},
-		"Wind11Host_ltsc2022": {
-			hostOs:    V22H2Win11,
-			ctrOs:     V21H2Server,
-			shouldRun: true,
-		},
-	} {
-		// Check if ltsc2019/ltsc2022 guest images are compatible on
-		// the given host OS versions
-		//
-		hostOSVersion := OSVersion{
-			MajorVersion: 10,
-			MinorVersion: 0,
-			Build:        tc.hostOs,
-		}
-		ctrOSVersion := OSVersion{
-			MajorVersion: 10,
-			MinorVersion: 0,
-			Build:        tc.ctrOs,
-		}
-		if CheckHostAndContainerCompat(hostOSVersion, ctrOSVersion) != tc.shouldRun {
-			var expectedResultStr string
-			if !tc.shouldRun {
-				expectedResultStr = " NOT"
-			}
-			t.Fatalf("Failed %v: host %v should%s be able to run guest %v", testName, tc.hostOs, expectedResultStr, tc.ctrOs)
-		}
-	}
-}