Hold a transitive update that would re-fork a deduped package - #38919
Hold a transitive update that would re-fork a deduped package#38919robobun wants to merge 31 commits into
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A bare bun update moved every edge to the newest release its range allows, even when a sibling edge keeps the old instance alive. With a wide range (like *) next to a narrower pin, that re-created the exact duplicate bun dedupe removes, so the two commands undid each other forever (#38903). plan_edges now drops a planned move when another edge on the same instance stays behind at the current version (its range rejects the candidate, or it is bundled or has no npm range) and the current version already satisfies the moving range. A deduped lockfile is then a fixed point of bun update; instances whose edges can all move, or vacate entirely, update as before.
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WalkthroughThe transitive update planner now caches candidate plans, preserves direct-row resolution state, and detects moves that would create surviving forks. CLI tests cover fixed-point deduplication, dependency cascades, latest updates, workspace and catalog behavior, removed constraints, and multi-instance resolution. ChangesTransitive update stability
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…er install suites The file ran on the 5s default; under ASAN on a loaded machine several install-spawning tests cross it. The other install suites already set the 5 minute ceiling.
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Addressed the automated comment-length findings: the forks_surviving_instance doc comment is now a single line (c0d7fd9). It describes the function's contract rather than justifying a workaround; the mechanism itself is unchanged. |
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Inline comments:
In `@src/install/update_transitive.rs`:
- Around line 1313-1328: Update forks_surviving_instance to accept a precomputed
edge-to-want index mapping, and build that mapping once per instance before
evaluating edges. Replace the repeated inst.wants.iter().position lookup with
direct mapping access while preserving the existing planned, bundled, and
effective npm range behavior; ensure callers reuse the mapping for all wants of
the instance.
- Around line 1208-1225: The loop over inst.wants must resolve skipped plans to
a fixed point before emitting pins: when forks_surviving_instance returns true,
update that want’s planned entry to remain at its current version/target rather
than leaving it as moving. Re-evaluate dependent wants after each such change so
later checks observe the stabilized surviving set, including unplanned peer
edges with providers.
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A held want must itself count as staying, so the hold set is computed to a fixed point instead of a single pass. Root and workspace rows are re-resolved by the differ rather than carried by the redirect, so the stays test for them is whether their best release in range is still the current version, matched by name against live rows only (after the differ re-appends root rows their resolutions are not yet valid, and orphaned rows outside every live slice are ignored).
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Addressed the review findings:
All four install suites pass locally (171 + 76 + 156 + 77). |
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Inline comments:
In `@src/install/update_transitive.rs`:
- Around line 1347-1362: Update the direct-row processing around the loop over
instances to precompute a map from package-name hashes to instance indexes using
lockfile.packages.items_name_hash(). For each supported npm or dist-tag version,
look up its name hash and only compare names with the candidate indexes,
retaining names.eql(...) to verify hash collisions before pushing the dependency
ID into direct.
In `@test/cli/install/bun-update-transitive.test.ts`:
- Around line 614-617: Update the test around run(dir, "update") to capture
stdout and assert the reported move rows for leaf using the existing move-report
helper, while preserving the stderr, lockedVersions, and exitCode assertions.
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…in edges_on_instances
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My earlier inline finding on the Some(w) arm (posted at line 1318) is addressed in the current revision: forks_surviving_instance now reads (planned[w].is_none() || held_wants[w]) and is called inside a fixed-point loop over held_wants, so a sibling want that gets held in one pass causes its neighbours to be re-checked in the next. Tracing the A=*/B=^1||^2/D=^1||^3 scenario against the current code: round 1 holds B (D rejects 2.0.0), round 2 then holds A (held B's range rejects 3.0.0), and nothing moves — a dedupe fixed point. That thread can be resolved.
Given this touches the package manager's transitive-update planner (new fork-detection logic, direct-row re-resolution modeling, and a flipped assertion in an existing test), a human look is still worthwhile.
Extended reasoning...
This run's bug hunter found only the setDefaultTimeout(5 min) nit, which is posted inline. Beyond that, I re-traced my own prior unresolved inline comment (the Some(w) arm / hold-cascade concern) against the head commit and confirmed the fixed-point loop plus the || held_wants[w] term resolves it — worth recording so the author and a human reviewer don't re-derive it. The change itself is ~200 lines of subtle resolution logic in plan_edges (modeling how the differ re-resolves root rows vs. how redirect() carries followers, iterating holds to a fixed point) and flips an existing test's expected behavior; that is well past the bar for auto-approval.
A direct row only keeps the current version alive when the differ will actually land it there. Rows outside the update scope (a member's rows under a bare root update, workspaces outside -r/--filter) keep their locked resolution and now use the redirect criterion instead of best-in-range; rows the differ resolves by the latest dist-tag (--latest with -r/--filter targets, named --latest rows) stay only when latest is the current version, and overridden rows keep the range model.
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…he row's own instance under --latest One-hop in-degree let a superseded chain's inner packages keep contributing followers, and the bare path had no gate for a removed root dependency's subtree; owners now must be reachable from a root/workspace (re-appended root rows reach through the snapshot). The keep-locked-if-ahead relaxation only holds where the resolver applies it: under --latest, against the row's own locked instance. Everywhere else a name-fanned direct row stays only when the lookup equals that instance's version, so a row parked on a lower instance no longer holds wants on a higher one.
…okup path A workspace member dropped from the glob keeps its Workspace tag until the clean, so reachability now seeds only the root and every owner is gated. keep_locked_if_ahead is modeled by where its locked version actually comes from: the highest loaded instance the range accepts for -r/--filter npm rows (which can keep the row away from a fanned instance), the row's own dist-tag entry on the bare path, and nothing for rows whose path finds no locked version.
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🤖 Prompt for all review comments with AI agents
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Inline comments:
In `@src/install/update_transitive.rs`:
- Around line 1385-1393: In the loop over owners, move the reachable check
before computing slice and is_direct. Continue immediately for unreachable
owners, then read dep_slices[owner] and evaluate the ResolutionTag match only
for reachable owners.
In `@test/cli/install/bun-update-transitive.test.ts`:
- Around line 907-912: In the test around serveRegistry, installServed, and the
temporary deletion of manifests.leaf["2.5.0"], add a concise comment explaining
that the mutation hides the version only during installation and restoring it
makes it available for the subsequent update; preserve the existing ordering and
behavior.
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…e --latest row The invoking workspace's rewritten dist-tag rows keep-lock against their original version on whichever instance they are evaluated, not only their own: KeepLocked::Version replaces Current, using the live or snapshot resolution's version.
… dist-tag originals An optional row the loaded lockfile left unresolved snapshots as the invalid id, so the locked lookup is bounds-checked instead of panicking. direct_row_stays now mirrors patched_package_satisfying (a patched loaded instance the range accepts captures the row before any lookup) and the bare --latest keep-locked arm excludes rows whose original package.json literal was a dist-tag, which the resolver never keep-locks.
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c29661a addresses the three prior findings (bounds-safe pkg_res.get with an unresolved-optional regression test, patched_capture before the manifest lookup, and original_literal_is_dist_tag gating the bare-cwd KeepLocked::Version arm). Beyond the inline nit, I also checked whether named-path direct rows are mismodeled with latest=true — they only reach plan_edges via the --latest-only refresh_children_of path, so the model holds.
Extended reasoning...
c29661a fixed all three items from the previous round: the pkg_res[id] panic on unresolved optional rows now uses .get(id)? and ships a workspace-optional regression test; patched_capture mirrors patched_package_satisfying at the top of direct_row_stays; and original_literal_is_dist_tag mirrors locked_version_of_invoking_workspace_row's dist-tag exclusion. This run's remaining finding is a narrow model/resolver divergence in the same class (the resolver's !is_peer() gate on the patched short-circuit is not mirrored). One additional candidate was examined and ruled out: named-path direct rows carrying latest=true while latest_for_target is false on that path — named updates reach edges_on_instances only through refresh_children_of, which is the --latest-only branch, so to_latest is set and the latest computation matches. Given the ~500 lines of new resolver-mirroring logic, the flipped pre-existing test assertion, and the number of divergence corners already iterated on, a human look is still warranted.
The redirect carries every remaining edge toward the first pinned want's target, so followers, held siblings and differ-landed direct rows all stay only when that target is out of their range; the keep-locked model also falls back to the lookup when the manifest no longer has the locked version, as keep_locked_if_ahead does.
Dist-tag pins join the first-wins search (their planned version is what the pin resolves to), and a moved direct row's landing is an earlier redirect target of its own, so stayers block only when no target is in their range.
… followers moved_pairs keys the redirect pair on the row's snapshot resolution, so the landing is offered to followers of that instance alone, not every name-fanned sibling.
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Problem
bun updateandbun dedupeundo each other forever when a wide range (*) sits alongside a narrower one for the same package.bun dedupecollapses onto the fewest versions that satisfy every edge, so withcookie@^1.1.1at the root and"cookie": "*"from@types/cookieit removescookie@2.0.1and points the*edge at1.1.1.bun updatethen re-resolves the*edge to the newest release its range allows (plan_edgesinsrc/install/update_transitive.rs), re-adding2.0.1next to the1.1.1the root pin keeps alive, which the next dedupe removes again, and so on.Fix
plan_edgesnow computes each want's candidate first, then drops (holds) a move that would fork the package: some other edge on the same instance stays behind at the current version while that version still satisfies the moving range, so the fork is exactly the duplicate dedupe removes.should_update/latest_for_target:DirectDependenciessnapshot;latestdist-tag for--latesttarget rows (catalog and overridden rows keep the range model, as do rows whose package.json literal is itself a dist-tag). A locked version is kept only when the manifest still contains it, and a lookup at or below current also counts as staying, since update never moves a direct row below bun.lock (keep_locked_if_ahead). They are matched by name against live dep slices because the differ re-appends root rows before the plan runs; orphaned rows outside every live slice are ignored.test/cli/install/bun-update-transitive.test.ts: the deduped fixed point (install, dedupe, update,dedupe --check, lockfile byte-identical), the hold cascade through a peer edge, a direct edge that moves away not holding its transitive siblings (and its landing carrying only its own instance's followers), a--latest -rpin that jumps to latest not holding its siblings, a pin ahead of a lagginglatesttag still holding, a workspace member's parked row holding a*sibling under a root update (and not holding wants on another instance), a root pin holding when updating from a member cwd, a catalog pin converging under--latest -r, superseded or removed subtrees (chained supersede, removed root dependency, removed workspace member) holding nothing, a direct row on a lower instance whose locked version left the manifest, and an unresolved optional row not panickingdependents with different ranges are resolved independently(nowa range edge is not forked off an instance a fixed sibling keeps alive): the old assertion pinned the re-forking behavior and has been flipped to the held statebun-update-transitive.test.ts(183 pass),bun-dedupe.test.ts(76 pass),bun-update.test.ts(156 pass),bun-update-lockfile-sync.test.ts(77 pass)dedupe --checkexits 0Background
name@version). Several edges with different ranges can resolve to the same instance, and the same name can have several instances when ranges cannot be unified.bun updatehas two halves: the differ re-resolves the update-scope root/workspace edges to the newest release their ranges allow (thelatestdist-tag under--latestwith-r/--filter), and the transitive pass (plan_edges) pins every other in-scope edge the same way. After resolution, a redirect pass carries edges that were not pinned onto a moved target when their range accepts it; that redirect is why an instance whose every edge accepts the candidate vacates completely and produces no duplicate.bun dedupeis a greedy minimum set cover over already-installed versions: it keeps the fewest instances that satisfy every edge's range (preferring higher versions on ties) and re-points edges onto survivors. It never contacts the registry.Repro from the issue
{ "dependencies": { "cookie": "^1.1.1", "@types/cookie": "^1.0.0" } }@types/cookiedeclares"cookie": "*".Before:
After:
[review] gate passed · iteration 5 · 2 files touched
fails on main (without fix)
passes on PR (with fix)
diff hotspot
gate history · 8 passed · 2 rejected · iteration 5
evidence per changed file
root cause · written by the author bot
The bug occurred because bun update re-resolved every edge to the newest version its own range allowed, so a wide range like the
*on cookie was moved to 2.0.1 and forked off the existing 1.1.1 instance, while bun dedupe collapsed that fork back because 1.1.1 also satisfied the range, leaving the two commands to undo each other indefinitely. The fix changes the transitive update planner to index edges onto package instances and evaluate each candidate npm move against the rows that would remain behind, skipping any move that would leave a surviving fork when an already-kept version satisf…