Godot's headless --import/--export-release refuses to auto-detect Blender
for .blend import: "Blender path is invalid or not set... Cannot configure
blender path in headless mode" (modules/gltf/editor/editor_scene_importer_blend.cpp).
Without this, the image's Blender install was silently unusable for its one
job — no .blend file would ever import in CI.
Bakes filesystem/import/blender/blender_path into a per-minor-version
EditorSettings .tres, same pattern barichello/godot-ci and abarichello's own
Dockerfile use for Android SDK/JDK paths.
Found and verified while resolving ticket #9 (Merge, publish, and validate
the debian-slim image end-to-end): confirmed a .blend import produces a real
.scn with this fix, and fails without it, on a real container built from
this Dockerfile.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
haylanandClaude-Bot