Entry 212

The carry in Rust

2026-09-27volumes

Filescrates/piney-gen/src/carry.rscrates/piney-gen/src/xfer.rscrates/piney-gen/src/sinit.rscrates/piney-gen/src/locate.rsplans/volumes.md

The second step after 0211. The carry finds where Infection's globals sit in Mutation, Outbreak and Quarantine, and piney-gen places every later volume's table through it. It was tools/carry.py and used pieces of tools/xfer.py. It is now piney-gen carry:

piney-gen carry [--volume MUT|OUT|QUA] [--check]

The command writes work/analysis/carry/<volume>.json, or with --check compares against it. The generator makes a missing cache itself, as the Python did.

What moved

• carry.rs: every pass, in the same order:
  • names;
  • the paired functions' votes;
  • unique content;
  • tables of pointers (by_pointers, with the edited-table vote);
  • by order in a changed function (by_sequence);
  • the fonts.
• xfer.rs: normalise, addresses, shape and aligned, the parts of tools/xfer.py the carry uses.

aligned rests on Python's difflib.SequenceMatcher, without its junk heuristic (autojunk=False). xfer::matching_blocks reproduces it: the longest match first (the earliest of equals), then either side of it, the blocks sorted and joined. A unit test holds two cases against difflib's own answers.

Parity

piney-gen carry --check matched all three caches byte for byte. It takes 20 seconds. piney-gen gen --check is still current.

Two places where Python's order is its hash order were made deterministic:

• the votes' globals, now by (name, address, size);
• similar's tally, now by first sight, as Python's Counter keeps it.

Neither changed a row.

sinit.rs had its own copy of addresses with a shorter list of low-half opcodes than xfer.py's. It gave the same mail links, but it now uses xfer::addresses, as sinit_tables.py did.

tools/xfer.py stays: voldiff.py, battle.py, statics.py and other tools use its addresses, normalise and shape, and it still writes the .syms sidecars.