Beagle SCM

JGET-009 HIGH: grandchild submodule title derived from the WRONG .gitmodules (depth-2 recursion → HOMENOPROJ)

In a depth-2 submodule chain (par→ch→gc), jab get mis-derives the grandchild's project title: recurseSubMounts reads the PARENT's top-level .gitmodules keyed by the NESTED path chsub/gcsub, which only declares chsub — so the url comes back empty and the title falls to basename("chsub/gcsub")="gcsub", not the correct gc (declared by the depth-1 sub's own chsub/.gitmodules). jab fetches be:…?/gcsub, keeper returns HOMENOPROJ, the grandchild mount fails and the whole get exits 1. Single-level subs mount fine; only the grandchild level breaks. Part of JGET-001; method Issues.

Input

Context

• Native beagle/test/get/{31-file-subs-parent-source, 45-file-subs-inflight-source}

  (be: parent, 3-level chain). Case 37 (single sub) is PARITY (rc=0).

• Root: recurseSubMounts (get.js:730) calls `submount.mount({wt: g.wt, subpath:

  "chsub/gcsub", …}); inside, gitmodulesUrl(g.wt, "chsub/gcsub") reads the parent top-level .gitmodules (only declares chsub) → url="" → wrong title gcsub`.

• Evidence ~/todo/JSGET-cases/c31/wk/02.b2.err (HOMENOPROJ, shard is gc).

Goals

• Grandchild (and deeper) sub titles resolve from the ENCLOSING sub's own

  .gitmodules (<wt>/<chsub>/.gitmodules, key gcsub), so the right shard (gc) is fetched; the full par→ch→gc chain mounts, matching native.

Constraints

• Read each level's .gitmodules relative to that level's mount, not the root.

  Repro-first; sequence after JGET-006.

WIP

Design decisions

• In recursion, resolve the sub's .gitmodules at the CHILD mount root and key by

  the LEAF subpath segment (gcsub), not the root .gitmodules keyed by the full nested path. Carry the resolved title down rather than re-deriving from basename.

TODOs

• Repro test: be/test/submount.js:96-104 — declaredUrl(wt,"dog/abc") resolves via dog/.gitmodules, title libabc not abc (the exact wrong-title shape).
• Fix the per-level resolution: SUBS-047 declaredUrl walks to the NEAREST enclosing .gitmodules (be/shared/submount.js:69-79, used by mount at :212); recurseSubMounts gates each level via isDeclaredSub(subWt, leaf) (be/verbs/get/get.js:873).
• Parity-port case 31 vs native: moot — d80bdb5c (TEST-003) RETIRED native as oracle; the SUBS-047 e2e (beagle→dog→dog/abc, a real depth-2 chain) verified the grandchild mount.

Blockers and bummers

• (none left) The JGET-006 repro gate no longer matters — covered by the unit test + e2e.

Outcome

• RETIRED 2026-07-07 (audit): fixed as SUBS-047 defect (C) — nested subs resolve url + Title via the nearest enclosing .gitmodules (declaredUrl), so the grandchild fetches the RIGHT shard.
• Landed: the SUBS-047 changeset (in the d80bdb5c/50e90012 window; be/test/submount.js added then).