Two bugs left built-in symbols (Device, Connector, ...) unresolvable, which
cascaded into every batch place/label/wire producing zero results:
- get_kicad_symbol_dir() only checked KICAD9/KICAD8_SYMBOL_DIR and a single
Linux path. It ignored the generic KICAD_SYMBOL_DIR, KiCad 10, and the
macOS/Windows install locations, so it returned None on macOS even with the
symbols present. Now checks KICAD_SYMBOL_DIR + KICAD{10,9,8,7}_SYMBOL_DIR and
per-platform default paths.
- resolve_library_path() never searched the system symbol directory for
<lib>.kicad_sym; the system dir was only used for variable substitution
inside a sym-lib-table. With no table configured (tests, fresh installs),
built-in libraries were unreachable. Added a system-dir fallback and covered
the KiCad 10/7 global-table config dirs.
Update test_env_override to clear ambient symbol-dir vars so the override under
test is decisive regardless of the host environment.
Ryan Malloy
1dca4d6912