5.3.0 compat: build Editor target for first-run setup

Author: adamrehn

src/ue4docker/dockerfiles/ue4-minimal/linux/Dockerfile

@@ -97,7 +97,9 @@ LABEL com.adamrehn.ue4-docker.excluded.templates={% if excluded_components.templ
 # Perform first-run setup for Mono, UnrealBuildTool and AutomationTool, which makes it possible to build Unreal projects and plugins as users other than `ue4`
 # (Note that this will only work with 4.26.0 and newer, older Engine versions will always require write access to `/home/ue4/UnrealEngine`)
 # See the comments on this issue for details, including the need to ensure $HOME is set correctly: <https://github.com/adamrehn/ue4-docker/issues/141>
-RUN ./Engine/Build/BatchFiles/Linux/Build.sh ShaderCompileWorker Linux Development -SkipBuild && \
+COPY print-editor-target.py /tmp/print-editor-target.py
+RUN EDITOR_TARGET=$(python3 /tmp/print-editor-target.py /home/ue4/UnrealEngine) && \
+	./Engine/Build/BatchFiles/Linux/Build.sh "$EDITOR_TARGET" Linux Development -SkipBuild && \
 	mkdir -p ./Engine/Programs/AutomationTool/Saved && \
 	chmod a+rw ./Engine/Programs/AutomationTool/Saved
 

src/ue4docker/dockerfiles/ue4-minimal/linux/print-editor-target.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+from pathlib import Path
+import json, sys
+
+# Parse the Unreal Engine version information
+engineRoot = Path(sys.argv[1])
+versionFile = engineRoot / "Engine" / "Build" / "Build.version"
+versionDetails = json.loads(versionFile.read_text("utf-8"))
+
+# Determine the name of the Editor target based on the version
+target = "UE4Editor" if versionDetails["MajorVersion"] == 4 else "UnrealEditor"
+print(target)