Add net label injection for generated schematics#280
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lachlanfysh wants to merge 1 commit intodevbisme:masterfrom
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Add net label injection for generated schematics#280lachlanfysh wants to merge 1 commit intodevbisme:masterfrom
lachlanfysh wants to merge 1 commit intodevbisme:masterfrom
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SKiDL's generate_schematic() produces hierarchical schematics with correct symbols and netlists, but without visible net labels on pins. This makes generated schematics hard to read — you can see the components but can't tell what connects to what. inject_labels.py solves this by reading the companion .net netlist, resolving pin-to-net mappings, and injecting global_label S-expressions at the world coordinates of every connected pin. Features: - Zero external dependencies (self-contained S-expression parser) - Handles rotation, mirror, and multi-unit sub-symbols - Deduplicates labels at identical positions (e.g. stacked USB-C GND) - Auto-orients labels to point away from symbol body - Converts auto-generated net names to readable form - Works with both KiCad 8 and 9 schematic format Tested with a 363-part hierarchical design across 8 subcircuit sheets, injecting 1,320 labels total. Usage: python -m skidl.tools.inject_labels input.kicad_sch circuit.net output.kicad_sch Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Merges work from three separate branches into a single unified implementation using SKiDL's existing placement/routing infrastructure: - New shared module: schematics/sexp_schematic.py Recursive hierarchy walker (following kicad5 node_to_eeschema pattern), coordinate system correction (Y-flip), deterministic UUIDs, lib_symbol extraction from draw_cmds, wire/junction/net-label generation, custom field export, and hierarchical sheet references. - kicad6/kicad8 gen_schematic.py: thin wrappers (~227 lines each) preprocess_circuit (with deg_to_orient pin normalization) -> SchNode -> place -> route -> write_top_schematic. Only difference is version number. - kicad9 gen_schematic.py: re-exports from kicad8 (identical format). - bboxes.py (kicad6/8/9): replaced broken 249-line versions with working pin-based bbox calculation (~101 lines each). - inject_labels.py: retained as standalone CLI post-processor utility. Sources: upstream/sexp_schematics (devbisme), feature/kicad8-gen-schematic (PR devbisme#281), feature/inject-net-labels (PR devbisme#280). Credit: cyberhuman (PR devbisme#270). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
inject_labels.py— a post-processor that adds global net labels to schematics generated bygenerate_schematic().netfile, resolves every pin-to-net mapping, and injects(global_label ...)S-expressions at pin world coordinatesFeatures
N$1,Net-(R1-1)) to readable formUsage
Or from Python:
Test plan
Context
Relates to #68 (Export to Eeschema Schematic) — this makes the generated output actually readable.
🤖 Generated with Claude Code