bazel: re-vendor render_gds PDK_CONFIGS fix (addon UnboundLocalError)

Bumping bazel-orfs to 3a5ddd7 picked up the upstream copy of our
layerstack-trim feature, but the upstream commit landed without the
PDK_CONFIGS monkey-patch fix that I added locally after upstream
sent the PR -- so the merged version still goes through the addon's
gdsii_use_custom_config=True path, which is broken:

  File ".../blendergds/__init__.py", line 613, in import_gdsii
    colorfile = addon_dir / pdk_info.get('color_path', ...) / ...
  UnboundLocalError: cannot access local variable 'pdk_info'

The addon's import_gdsii skips initialising pdk_info / addon_dir in
the custom-config branch but uses them a few lines later for the
color_path lookup.  Vendor a one-hunk patch on render_gds.py that
monkey-patches addon.PDK_CONFIGS[pdk]['config_path'] instead, so the
addon's else branch fires normally.  Path's absolute-RHS semantic
makes `addon_dir / Path(abs_path)` evaluate to the absolute path,
so the trim YAML still resolves correctly.

Once a fix lands upstream (in bazel-orfs or in the BlenderGDS
addon's __init__.py), this can be dropped and bazel-orfs bumped
again -- the patches/ directory comes back if we need a vendored
fix in the meantime.

Signed-off-by: Øyvind Harboe <oyvind@ascenium.com>
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Author: oharboe

MODULE.bazel

@@ -57,6 +57,10 @@ BAZEL_ORFS_REMOTE = "https://github.com/The-OpenROAD-Project/bazel-orfs.git"
 git_override(
     module_name = "bazel-orfs",
     commit = BAZEL_ORFS_COMMIT,
+    patch_strip = 1,
+    patches = [
+        "//patches/bazel-orfs:0001-render_gds-monkey-patch-PDK_CONFIGS-not-gdsii_use_custom_config.patch",
+    ],
     remote = BAZEL_ORFS_REMOTE,
 )
 

patches/bazel-orfs/0001-render_gds-monkey-patch-PDK_CONFIGS-not-gdsii_use_custom_config.patch

@@ -0,0 +1,49 @@
+From 0010e181efa28210dbf7839e6e6131139cc705bd Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=98yvind=20Harboe?= <oyvind@ascenium.com>
+Date: Mon, 18 May 2026 00:06:14 +0200
+Subject: [PATCH] render_gds: monkey-patch PDK_CONFIGS instead of
+ gdsii_use_custom_config
+
+The addon's gdsii_use_custom_config=True branch in import_gdsii skips
+initialising pdk_info and addon_dir, both of which are still used a
+few lines later to resolve color_path -- so any non-default
+layerstack YAML trips UnboundLocalError inside the addon.
+
+Patch the addon's PDK_CONFIGS dict at runtime instead, pointing the
+selected PDK's config_path entry at our trimmed YAML.  The else
+branch then fires normally, pdk_info is set, color_path resolves,
+and Path's absolute-RHS semantic makes addon_dir / Path(abs_path)
+evaluate to the absolute path.
+---
+ tools/blendergds/render_gds.py | 12 ++++++++++--
+ 1 file changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/tools/blendergds/render_gds.py b/tools/blendergds/render_gds.py
+index cbe116c..b53da1e 100644
+--- a/tools/blendergds/render_gds.py
++++ b/tools/blendergds/render_gds.py
+@@ -289,11 +289,19 @@ def main():
+         # in seconds rather than 5-7 minutes + 16 GB RSS.  No-op for
+         # PDKs without a preset and for designs whose full stack is
+         # already small enough.
++        # We can't go through the addon's `gdsii_use_custom_config = True`
++        # path: that branch in `import_gdsii` skips initialising
++        # `pdk_info` and `addon_dir`, both of which are still used
++        # afterwards to resolve `color_path` -- so a custom YAML trips
++        # `UnboundLocalError: pdk_info` inside the addon.  Instead,
++        # monkey-patch PDK_CONFIGS[pdk]['config_path'] to point at the
++        # trimmed YAML (absolute path -- `addon_dir / Path("/abs")`
++        # evaluates to the absolute path in pathlib, so the else branch
++        # in the addon picks it up correctly).
+         trimmed = _trim_layerstack(addon, addon_root, args.pdk, tmp)
+         if trimmed is not None:
+             yaml_path, kept_layers, missing = trimmed
+-            bpy.context.scene.gdsii_use_custom_config = True
+-            bpy.context.scene.gdsii_config_path = str(yaml_path)
++            addon.PDK_CONFIGS.setdefault(args.pdk, {})["config_path"] = str(yaml_path)
+             _log_phase(
+                 "layerstack-trimmed",
+                 extra=(
+-- 
+2.51.0
+

patches/bazel-orfs/BUILD.bazel

@@ -0,0 +1,8 @@
+"""Vendored patches applied on top of the bazel-orfs git_override pin.
+
+These are small fixes we keep here to reduce churn while iterating;
+when they land upstream, drop the entry from MODULE.bazel and bump
+BAZEL_ORFS_COMMIT instead.
+"""
+
+exports_files(glob(["*.patch"]))