From 00392e75baaa66f0bc5ed9c36e7e25d3d7f66407 Mon Sep 17 00:00:00 2001
From: Michal Karm Babacek <karm@redhat.com>
Date: Wed, 5 Oct 2022 20:47:54 +0200
Subject: [PATCH] Allow Linux extensions on Windows with containers

---
 .../nativeimage/UnsupportedOSBuildItem.java          | 12 ++++++++++++
 .../deployment/pkg/steps/NativeImageBuildStep.java   |  4 +++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/core/deployment/src/main/java/io/quarkus/deployment/builditem/nativeimage/UnsupportedOSBuildItem.java b/core/deployment/src/main/java/io/quarkus/deployment/builditem/nativeimage/UnsupportedOSBuildItem.java
index 04ba9d9ab526e..159e406ecef18 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/builditem/nativeimage/UnsupportedOSBuildItem.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/builditem/nativeimage/UnsupportedOSBuildItem.java
@@ -5,6 +5,7 @@
 import static io.quarkus.dev.console.QuarkusConsole.IS_WINDOWS;
 
 import io.quarkus.builder.item.MultiBuildItem;
+import io.quarkus.deployment.pkg.NativeConfig;
 
 /**
  * Native-image might not be supported for a particular
@@ -30,4 +31,15 @@ public UnsupportedOSBuildItem(Os os, String error) {
         this.os = os;
         this.error = error;
     }
+
+    public boolean triggerError(NativeConfig nativeConfig) {
+        return
+        // When the host OS is unsupported, it could have helped to
+        // run in a Linux builder image (e.g. an extension unsupported on Windows).
+        (os.active && !nativeConfig.isContainerBuild()) ||
+        // If Linux is the OS the extension does not support,
+        // it fails in a container build regardless the host OS,
+        // because we have only Linux based builder images.
+                (nativeConfig.isContainerBuild() && os == Os.LINUX);
+    }
 }
diff --git a/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java b/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java
index be61fb022f7de..dbedfb8aee9d8 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java
@@ -891,7 +891,9 @@ public NativeImageInvokerInfo build() {
                 }
 
                 if (unsupportedOSes != null && !unsupportedOSes.isEmpty()) {
-                    final String errs = unsupportedOSes.stream().filter(o -> o.os.active).map(o -> o.error)
+                    final String errs = unsupportedOSes.stream()
+                            .filter(o -> o.triggerError(nativeConfig))
+                            .map(o -> o.error)
                             .collect(Collectors.joining(", "));
                     if (!errs.isEmpty()) {
                         throw new UnsupportedOperationException(errs);