`zq.py` hardcoded one absolute path, and it pointed inside `xenia-rs` --
a repository CONSOLIDATION.md archives in Phase 5 and drops in Phase 7. It
resolved on exactly one machine, and on that machine it was days from becoming
a `duckdb` exception about a missing file, with nothing saying why.
Resolution order is now `$SYLPH_XEXDB`, else `<repo root>/sylpheed.db`, else a
refusal that names both. The repo-root path is taken relative to this script,
not the caller's cwd, because zq.py is run from wherever the investigation is.
No fallback beyond that, on purpose. The database is a build artefact of a few
hundred MB and is not tracked, so there is nothing to fall back *to*; a default
that silently resolves to the wrong database is worse than no default. That is
issue #16's lesson, which was about exactly this shape in the test suite.
Both failure paths say what to do and exit 1:
$ zq.py fn 82000000 # nothing set, nothing at the repo root
no database found.
looked for: /…/Sylpheed/sylpheed.db
set $SYLPH_XEXDB to an existing one, or build it with:
sylph-xexdb dis <xex|iso> --db sylpheed.db --analyze sql
$ SYLPH_XEXDB=/nope/missing.db zq.py fn 82000000
$SYLPH_XEXDB is set but is not a file:
/nope/missing.db
Also fixes the regeneration hint, which still named `xenia-rs dis` -- the
retired binary. It is `sylph-xexdb dis`.
Connecting is skipped when there is no subcommand, so `zq.py` still prints its
usage on a machine that has no database yet.
Verified: usage with no db (rc 0); missing db (rc 1); `$SYLPH_XEXDB` set to a
non-file (rc 1); and `$SYLPH_XEXDB` pointed at a real 336 MB database, where
`imp Rtl` returns its 1,280 `RtlLeaveCriticalSection` call sites. That database
turns out to have been generated from the uncommitted tree this branch ports:
it carries `import_address`, `import_role` and all 16 foreign keys -- an
independent confirmation of the schema the golden test now locks.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Carries `xenia-rs` `harvest/import-thunk-naming` (b4f19f1) across into the
lifted crate. That work was found UNCOMMITTED in the retired repo's working
tree on 2026-09-14 and exists nowhere else: absent from `iterate-4A`, absent
from this crate as lifted. CONSOLIDATION.md Phase 5 ends with "delete the local
clone" and Phase 7 drops the emulator, so it had a deletion scheduled against
it.
Not a cherry-pick. The lift's base is exactly the harvest's parent (8401d4d),
so each file was merged three-way -- lifted vs base vs harvest -- which is what
made the port reviewable: 10 conflicts, 9 of them pure rustfmt reflow from the
lift's formatting pass, and 1 semantic.
The semantic one is insertion ORDER. `xdbf_achievements.image_id` is now a
foreign key onto `xdbf_images(id)`, so the image rows must be inserted before
the achievement rows. The merge moved that block; the conflict was the stale
copy left at the old position.
What arrives:
* **Import-thunk recognition** (`imports.rs`, 338 lines). An XEX import is not
a PLT jump: the linker emits a four-word thunk whose first two words are
import RECORDS that the loader rewrites at module load. On disc they are
still records, so a PowerPC-only decoder prints two meaningless `.long`s in
front of an indirect branch. This maps every word of every thunk, and every
direct branch into one, back to its `imports` row. Shape-validated rather
than trusted: an entry is indexed only when the four words it points at
actually have the thunk shape.
Adds `instructions.import_address` (FK onto `imports.address`) and
`import_role` (`'record'` | `'thunk'` | `'call'`, NULL iff import_address is
NULL), plus an index. `tools/zq.py` gains `imp` and `impcalls`, and `dis`
now names imports instead of printing `.long 0x01010194`.
* **Sixteen schema-wide foreign keys**, declared wherever a column is derived
from another table. CREATE TABLE and insertion order become load-bearing.
`functions` is deliberately NOT an FK parent and the golden test now asserts
zero inbound FKs onto it: DuckDB implements UPDATE as delete+insert, so one
inbound FK would make `functions.name` un-updatable and break
`apply_re_symbols.sql`, which re-applies RE symbol names after every
regeneration.
The database path needed no change in the binary: `DbWriter` builds its own
index inside `ingest_instructions` from `info.import_libraries`. Only the two
output paths (`enrich_section` for JSONL, `write_asm`) take it as an argument.
Verified: `cargo test -p sylpheed-xexdb` = 10 passed / 0 failed, including
`db_schema_golden` (41s, builds a real DuckDB) which locks the 16-FK set and
the no-FK-onto-functions rule. `cargo clippy -p sylpheed-xexdb --all-targets
-- -D warnings` clean; `cargo fmt --all --check` clean.
Stacked on #32 -- it ports into a crate that only exists there.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
