install: bind peer edges in the hoister, the way loading bun.lock binds them - #38767
install: bind peer edges in the hoister, the way loading bun.lock binds them#38767robobun wants to merge 11 commits into
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…ree that gets saved Loading bun.lock binds a required ranged peer edge to the highest satisfying version in the lockfile. The resolver, an install on top of an existing lockfile, and the lockfile migrations left such an edge bound to whatever satisfied it at the time, so the tree written by one install was rebuilt differently by the next one that loaded it: in the hoisted linker a different version landed at the root of node_modules (bun.lock itself was not rewritten), in the isolated linker the store entry was re-keyed. Lockfile::resolve now applies the loader's binding rule to every peer edge before hoisting, so fresh, incremental, migrated and reloaded trees are built from the same bindings.
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Status: ready for review at e2ba576 (rework per @dylan-conway's comment). Reproduced on a main release build with Current shape: the hoister binds each peer edge as it processes it, so every tree build agrees with CI (build 97732): 176 of 179 jobs green, including every install suite on every platform. The one red job is the x64-asan lane on |
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WalkthroughChangesThe lockfile resolver now binds ranged peer dependencies through Bun lockfile resolution before repeated hoisting. Tests cover hoisted and isolated installs, repeated reinstalls, lockfile regeneration, and npm migration parity. Ranged peer rebinding
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In `@test/cli/install/isolated-install.test.ts`:
- Around line 1261-1263: Strengthen the assertions around the filtered
isolated-store entries: verify entries contains exactly one entry, confirm that
entry is different from initialEntry, then check its peerNoDepsVersion is 1.0.1.
Remove the destructuring/filter-based validation that can hide a lingering old
entry.
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src/install/lockfile.rstest/cli/install/hoist.test.tstest/cli/install/isolated-install.test.tstest/cli/install/migration/migrate.test.ts
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Updated 7:05 AM PT - Aug 15th, 2026
❌ @robobun, your commit e2ba576 has 1 failures in
🧪 To try this PR locally: bunx bun-pr 38767That installs a local version of the PR into your bun-38767 --bun |
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…lve() The yarn.lock migration keys all but one version of a name under synthetic hashes in package_index, so binding against it rebound a peer to whichever copy yarn.lock listed first, even when that copy does not satisfy the range. Call the pass from the two callers whose index holds every version: Cloner::flush (every install) and the package-lock.json migration. pnpm already binds its edges with the same helper; yarn keeps the bindings its specs resolved to.
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The yarn.lock migration concern from my earlier review is addressed — the pass now lives in Cloner::flush and the npm migration only, resolve() is back to just the hoist loop, and every_package_is_indexed_by_name asserts the precondition in debug builds. No further issues found this pass.
Because this changes which version a ranged peer edge binds to before hoisting on every install path, and therefore which copy lands at the root of node_modules, a human familiar with the install/hoist subsystem should still sign off.
What was reviewed:
- Confirmed
resolve()callers (yarn.rs, pnpm.rs, bun.lock.rs) no longer reach the new pass; pnpm and the bun.lock loader already bind viaresolve_peer_dep_version_basedthemselves. - Checked the debug assertion covers the yarn synthetic-hash case that broke the first cut; the new yarn test pins the foo@1.0.0-first ordering.
- Checked the four new tests assert the fixed point (reinstall is a no-op, lockfile byte-equal, fresh resolve matches) rather than just the layout.
Extended reasoning...
Overview
Adds Lockfile::bind_peers_like_bun_lock (lockfile.rs, ~30 lines) which walks buffers.dependencies/resolutions and rebinds every peer edge via the existing TextLockfile::resolve_peer_dep_version_based, plus a debug-only every_package_is_indexed_by_name precondition check. Called from two sites: Cloner::flush right before resolve() (every install/add/remove/update) and migrate_npm_lockfile right before its resolve(). Four new tests across hoist.test.ts, isolated-install.test.ts, migrate.test.ts, and yarn-lock-migration.test.ts.
Security risks
None. No untrusted input parsing added; the pass reads already-constructed lockfile buffers and calls an existing resolution helper. No filesystem/network changes.
Level of scrutiny
High. Cloner::flush runs on every install, and the pass changes which package a peer edge points at before the hoister runs — that decides which version of a name sits at the root of node_modules and how bun.lock is keyed. The first cut of this PR had a real bug (rebinding against yarn.rs's synthetic package_index) which I flagged and the author fixed by moving the call out of resolve(); the invariants here are subtle enough that a maintainer who owns the install subsystem should confirm the approach and the upgrade-impact analysis in the PR description.
Other factors
- My prior finding is fully addressed:
resolve()is back to a bare hoist loop, the two explicit call sites both buildpackage_indexviaget_or_put_id, and the debug assertion trips if a future caller violates that. The yarn regression test covers the exact ordering that broke. - Test coverage is strong for the shape of change: hoisted + isolated linkers, npm migration parity with a fresh resolve, and the yarn guard. The author reports the full install/migration suite passes locally with unchanged snapshots.
- Two comment-cop bot comments remain open on the doc comment at lockfile.rs:1266-1267; robobun replied that it is a one-sentence invariant description, not a workaround justification, which reads correctly to me.
- CI's only failure (
test-http-chunk-problem.js) is unrelated and fails on main too per robobun.
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peers should bind the same everywhere, not just bun.lock. this seems like a back running this function before hoist. i think it should be hoist itself |
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Agreed, will move it. Plan: the hoister binds each peer edge as it processes it (in |
The hoister now binds each peer edge it processes the way bun.lock loading does, so every tree build (loader, clean, every migration and the filter pass that installs) binds the same way, replacing the pass that clean and the package-lock.json migration had to remember to run. The yarn.lock migration indexed only one version of each name under the name itself and the rest under synthetic keys nothing looked up; it now indexes every package under its name like the other lockfile builders, which hoisting relies on. verify_data checks that invariant in debug builds.
robobun
changed the title
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@dylan-conway done in a7b557a (HEAD 2febcf5, main merged in). The binding is now in the hoister: |
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Cross-reference from #38892, which touches the other half of this: the
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### Problem - `bun install --frozen-lockfile` fails with `error: lockfile had changes, but lockfile is frozen` on a `bun.lock` whose tree has not changed, as soon as the file contains an entry that nothing depends on and that entry is not the last one in the file. Field case: activepieces/activepieces at HEAD, whose committed (1.3-written) lockfile 1.3.14 accepts; with #38853 applied, main still rejects it. - `Lockfile::eql` (`src/install/lockfile.rs`) compares the cleaned lockfile's tree with the tree the loaded lockfile was hoisted into at load time. It took a `cut_off_pkg_id` and left out every placement bound to a package id at or past it, on both sides. The callers pass the cleaned lockfile's package count. On the cleaned side that is a no-op. On the loaded side it does two things: it catches edges that resolving rebound to packages appended after load (those ids are past the loaded count; the loaded tree still places them, so leaving them out makes the counts differ; `bun update --frozen-lockfile` moving a transitive dependency relies on this, `bun-update-transitive.test.ts`), and, as soon as the clean dropped an entry, it also leaves out the loaded side's own last packages, whose ids are past the cleaned count but below the loaded one. That second effect is the bug: a real placement disappears from the comparison and the counts differ. - In activepieces the dropped entry is `react-dom@18.3.1`: the file nests it under `react-json-view` for a peer range (`^15 || ^16 || ^17`) nothing in the file satisfies, and since #32182 the loader binds that edge by version, falling back to the first candidate (`react-dom@19.2.5` at the root), so the nested copy is referenced by nothing and the clean drops it (4069 -> 4068 packages). The file's last entry, `mdast-util-find-and-replace@1.1.1` (id 4068), is placed twice; both placements were left out on the loaded side. The two hoists otherwise agree placement for placement (trace in the details below). ### Fix - The boundary on the loaded side is now the loaded lockfile's own package count at load time, which `mark_loaded_packages` already records for the resolver (`loaded_package_count`); the two callers in `install_with_manager.rs` pass `lockfile_before_clean.loaded_package_count`. A placement bound past it was rebound to a package appended by this install, so `eql` now returns false on it directly instead of leaving it out and relying on the counts. The cleaned side is compared whole. The debug-build determinism check in `save_lockfile` compares a lockfile with itself and keeps passing its own count. - Correct because the two things the old boundary mixed up are now separate: a rebound edge is a changed resolution and fails, and a package the clean dropped only matters if it was placed in the loaded tree, in which case its placements are now counted on the loaded side and missing on the cleaned side, which still fails. An entry that was in no tree no longer affects the result. - Visible consequence outside the frozen check: the same comparison decides whether a non-frozen install re-saves, so a no-op `bun install` on a lockfile whose only difference is an entry outside the tree no longer rewrites the file just to drop it; it is dropped the next time anything else causes a save. Installs with a package.json diff still save regardless (`had_any_diffs`). - Test: `test/cli/install/bun-lock.test.ts`, "--frozen-lockfile accepts a bun.lock with an entry nothing depends on, wherever it is listed". A hand-written lockfile with `no-deps` (depended on) and `a-dep` (not depended on) in both orders; on main the order with `a-dep` first fails with the error above, with this change both orders install `no-deps` only and leave the file untouched. The rebound case stays covered by the existing `bun update --frozen-lockfile` test in `bun-update-transitive.test.ts`, which failed on the first version of this PR (it dropped the loaded-side check entirely) and passes now. - With this change plus #38853, the committed lockfiles of activepieces, opencode, eliza and supermemory pass `--frozen-lockfile` with the debug build (activepieces still logs `4069 -> 4068` and passes); hono and remotion still pass, and a further 72 small repos with a committed `bun.lock` behave identically on 1.3.14, main and the two changes combined (65 pass everywhere, 7 are already out of date everywhere). Suites run with the debug build: `bun-lock`, `bun-update-transitive`, `bun-update`, `bun-add`, `bun-remove`, `migration/migrate`, `frozen-lockfile-pruned`, `frozen-lockfile-missing-workspace`, `lockfile-only`, `bun-lockb`, `bun-workspaces`, `isolated-install`, `bun-dedupe`, `bun-prune`, `hoist`, `catalogs`, `overrides`, `nested-overrides`, `lockfile-version-2`, `bun-install-registry`. - Not changed here: the loader binding an out-of-range peer to a different version than the entry the file nests next to the dependent (the producer of the unreferenced entry above). That rewrites such 1.3 lockfiles on the next non-frozen install and changes which copy the dependent gets; it is the same family as #38767 / #38768 / #38837 and is tracked separately. ### Background - `bun.lock` stores the hoisted tree as keys: `a/b` means `b` is installed in `a`'s `node_modules`. Loading the file creates one package per distinct entry (ids in file order), binds every dependency edge, and hoists the result into an in-memory tree. `mark_loaded_packages` then records the package count; anything resolving appends afterwards (a newer version `bun update` picked, a package added to package.json) gets a higher id, and edges may be rebound to those packages in place, while the tree built at load time is not rebuilt. - `clean_with_logger` builds a fresh lockfile by walking from the root (ids in walk order), so packages no edge reaches are dropped, and hoists it again. `--frozen-lockfile` compares that tree with the load-time tree using `Lockfile::eql`: placements are listed as (path, package), sorted, and compared pairwise on name, resolution, bins and scripts. The same comparison decides after a normal install whether the lockfile is saved again. `bun.lockb` uses a hash over the package list instead (`packages_len_before_install` still feeds that). <details> <summary>Hoist trace on activepieces (temporary instrumentation, not part of the change)</summary> Every decision the hoister made for `mdast-util-find-and-replace`, first while loading the file (ids 2628/4068), then during the clean (ids 1344/2474). The two runs are identical; only the comparison differed. ``` hoist dep_id=10546 pkg_id=2628 parent_pkg_id=2640 tree_node=858 -> Placement(ancestor) hoist dep_id=10499 pkg_id=2628 parent_pkg_id=2631 tree_node=1120 -> Hoisted(dedupe) hoist dep_id=16465 pkg_id=4068 parent_pkg_id=4043 tree_node=1222 -> Placement(own node) hoist dep_id=16465 pkg_id=4068 parent_pkg_id=4043 tree_node=1227 -> Placement(own node) hoist dep_id=3661 pkg_id=1344 parent_pkg_id=1347 tree_node=858 -> Placement(ancestor) hoist dep_id=3651 pkg_id=1344 parent_pkg_id=1343 tree_node=1120 -> Hoisted(dedupe) hoist dep_id=7043 pkg_id=2474 parent_pkg_id=2473 tree_node=1222 -> Placement(own node) hoist dep_id=7043 pkg_id=2474 parent_pkg_id=2473 tree_node=1227 -> Placement(own node) ``` Placement diff reported by an instrumented `eql` (raw `hoisted_dependencies` lengths were equal; only the filtered lists differed, by exactly the two placements of loaded id 4068): ``` only in cleaned: @tryfabric/martian/remark-gfm/mdast-util-gfm/mdast-util-gfm-autolink-literal :: mdast-util-find-and-replace@1.1.1 only in cleaned: slackify-markdown/remark-gfm/mdast-util-gfm/mdast-util-gfm-autolink-literal :: mdast-util-find-and-replace@1.1.1 ``` </details> <details> <summary>First version of this PR</summary> The first push removed the boundary altogether, on the reasoning that nothing appends packages during the install step any more. That is true of the step after the clean, but resolving before the clean still appends and rebinds, and the loaded tree is not rebuilt, so `bun update --frozen-lockfile` on a stale lockfile was accepted (`bun-update-transitive.test.ts` caught it in CI). The current version keeps that check and only moves the boundary to the loaded side's own count. </details> <!-- robobun:evidence:begin --> --- **no test proof** · iteration 0 · Platform-specific test(s) that do not run on this machine. Deferring to CI, which covers all platforms: test/cli/install/bun-lock.test.ts <!-- robobun:evidence:end -->
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The
With this PR's index loop all three dedupe to the migrated package. Three bun/test/cli/install/migration/yarn-lock-migration.test.ts Lines 1647 to 1791 in fa524e8 yarn.rs change as here, plus the tests; they fail on main and pass with the loop). Feel free to fold them in; I am not opening a separate PR for this since the fix is already here (and in #38878).
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Update to the note above: #38892 was reworked and the interaction is gone. It now removes the nothing-satisfies fallback from |
3 participants
Problem
bun installwrites is not always the tree the nextbun installbuilds from that file. Repro with three dependencies, no lockfile from an older Bun involved:next+postcss-loader, thenbun add -d vite, then a plainbun installwith nothing changed prints2 packages installed, movesnode_modules/postcssfrom 8.4.31 to 8.5.26 (8.4.31 now undernext/node_modules), and leavesbun.lockuntouched, still keyed with 8.4.31 at the root. A later unrelatedbun addthen flips thepostcsskeys in the lockfile diff. With the isolated linker the same second install re-keys thepostcss-loaderstore entry instead.bun.lock, 1.3.14 installs 8.4.31 at the root, 1.4 installs 8.5.26): the 1.3 lockfile records a tree built from a peer binding that 1.4 no longer reproduces on load, see Background.bun.lockbinds a required ranged peer edge (postcss-loader->postcss@^7 || ^8.0.1) to the highest satisfying version in the file (bun.lock.rs,resolve_peer_dep_version_based). Nothing applies that rule when the tree is written: the resolver leaves the edge on whatever satisfied it when it was resolved, an install on top of an existing lockfile keeps the binding it loaded (Package::clonecopies it,get_or_put_resolved_packagereturns early on a bound edge) even when this install adds a higher version, and thepackage-lock.json/yarn.lockmigrations bind to whatever the other tool had installed. The first load after such a write moves the edge.Tree.rs,process_subtree) places whatever a peer edge points at, and rootdevDependencieshoist beforedependencies(Behavior::cmp), so a dev tool's peer edge usually decides which version of a package sits at the root ofnode_modules. The lockfile is not rewritten because the save check (Lockfile::eqlininstall_with_manager.rs) compares the loaded tree with the cleaned tree, both built from the rebound edge.Fix
Tree.rs,Builder::bind_peer, called at the top of the per-dependency loop inprocess_subtree) with the loader's ownresolve_peer_dep_version_based, before the edge is filtered, placed or deduped. Every tree goes through this one place: the tree built after loadingbun.lock, the onecleanbuilds for saving and installing (every install, add, remove, update), the one the install pass filters, and the ones the package-lock.json / yarn.lock / pnpm-lock.yaml migrations build. So whatever bindings the edges arrive with, the tree built from a given set of packages is the same, and it is the tree a reload of the saved file rebuilds. Edges the loader leaves on the tree walk (optional peers,*ranges, overridden names) returnNonefrom the shared helper and are left alone, so the exemptions stay in one place; the loader itself is unchanged. (The first version of this PR ran a separate pass before hoisting from two call sites; review asked for it to live in the hoister.)yarn.rs: hoisting now consultspackage_index, and the yarn.lock migration was the one lockfile builder that did not index packages by name: it put one version of each name under the name and the others under synthetic keys (name#id,parent/name,name@version, alias names) that nothing ever looked up, plus a usage count nothing read. It now indexes every package under its own name the waybun.lockbloading and the npm / pnpm migrations do (about 210 lines replaced by a 4-line loop). The migrated tree is otherwise unaffected, every yarn snapshot is unchanged, and a side effect is that dedupe lookups during the install that migrates now see all versions, as they do after any other load.verify_data(debug builds) checks that every package is inpackage_indexunder its own name, so a builder that stops indexing fails the install suites instead of mis-binding peers.package_indexlookup per peer edge per tree build; non-peer edges pay one flag test.src/changes, passes with them):test/cli/install/hoist.test.ts: hoisted linker, thebun addsequence above with registry fixtures; the reinstall must be a no-op, the layout andbun.lockmust match, and a fresh resolve of the samepackage.jsonmust write the same lockfile. On main the reinstall prints2 packages installed.test/cli/install/isolated-install.test.ts: same sequence, the store entry must be re-keyed by the install that adds the version, not the next one, and the project link must point at the rebound variant. On main the reinstall prints+ peer-deps-fixed@1.0.0.test/cli/install/migration/migrate.test.ts: apackage-lock.jsonwhere npm satisfied the peer with the lower hoisted version migrates to the samepackagesa fresh resolve writes. On main the migrated root key is the lower version.test/cli/install/migration/yarn-lock-migration.test.ts: a yarn.lock whosefoo@^1.0.0spec resolved to the 1.0.0 it lists first while 1.5.0 is also in the graph migrates with 1.5.0 at the root (1.0.0 nested under its exact dependent). On main it keeps yarn's 1.0.0 at the root and nests 1.5.0, a tree the first reload then rebuilds differently.isolated-install,bun-install-registry,bun-lock,bun-lockb,bun-workspaces,catalogs,bun-dedupe,bun-prune,bun-audit,bun-update,bun-update-transitive,bun-add,bun-add-catalog,bun-add-filter,bun-remove,bun-patch,overrides,nested-overrides,frozen-lockfile-pruned,public-hoist-pattern,bun-pm-why,lockfile-only,lockfile-version-2,bun-update-lockfile-sync,isolated-relink,migrate-bun-lockb-v2and every migration suite, all green with every snapshot unchanged.bun-install.test.tsandcomplex-workspace.test.tsfail identically here without the change (gitlab/bitbucket and other external hosts are blocked in this environment).Background
bun.lockstores packages keyed by thenode_modulespath the hoister chose, and stores no explicit target for peer edges. On load, ordinary edges are resolved by walking up those keys; since install: fix stale global-store links on disable and peer edge drift across bun.lock loads #32182 required ranged peer edges are instead bound by version, because the key walk rebound them to whatever was hoisted above them, which re-keyed isolated store entries (whose names hash the peer bindings) on every warm install.postcss-loader,viteplugins, eslint plugins).package.jsonhere put 8.5.26 at the root, the ledger's run put 8.4.31 there), and this branch never writes one. Such a lockfile is still installed deterministically by 1.4 and its keys are corrected by the next install that saves; a plainbun installthat only loads it does not rewrite it, since the save check compares trees built from the same bindings. Making that case re-save on load is possible but is left out of this change.*peers after their siblings, not on arrival order #37713 (*peers) and install: let the hoister bind optional peers when loading bun.lock #37925 (optional peers) change which edges the loader binds by version; because the hoister calls the same helper, the written tree follows whatever rule the loader ends up with.Real-world sequences (registry, bun 1.3.14 vs main, this machine)
no test proof · iteration 5 · Platform-specific test(s) that do not run on this machine. Deferring to CI, which covers all platforms: test/cli/install/isolated-install.test.ts test/cli/install/migration/migrate.test.ts