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`bun patch <name>` compared `<name>` with the dependency's name in package.json only. For `"my-alias": "npm:dep@1.0.0"` that name is the alias, so `bun patch dep` and `bun patch dep@1.0.0` failed with "package dep not found", although `dep` is the name that bun prints and the name that keys the patch. The lookup now matches the name in package.json or the name of the resolved package. The folder name comes from the dependency, not from the argument, and passes the same check as an install before it becomes a path. When an alias and the plain name install different versions, the lookup asks for a version, as it does for nested versions. `bun patch <alias>` looked up the existing patch as `<alias>@<version>`, so a second `bun patch <alias>` started from the unpatched package. It now uses the package name, which is the key in `patchedDependencies`.
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Included review availability: Your plan provides up to 10 included reviews per hour; 0 remain after this review. WalkthroughChangesPatch package lookup now resolves install folder names for aliased dependencies, validates install targets, and prefers direct matches. Patch preparation and commits use the resolved folder. Tests cover selection, version resolution, repeated commits, linker behavior, malformed IDs, and unsafe aliases. Aliased patch resolution
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Updated 1:42 PM PT - Sep 19th, 2026
✅ @robobun, your commit 6d84aec0cf806bac621ffc8144875d46eed1ba33 passed in 🧪 To try this PR locally: bunx bun-pr 43382That installs a local version of the PR into your bun-43382 --bun |
StatusReproduced on bun 1.4.3-canary.1 (linux x64): # package.json: { "name": "root", "dependencies": { "my-alias": "npm:no-deps@1.0.0" } }
bun install
bun patch no-deps # error: package no-deps not found (exit 1)
bun patch no-deps@1.0.0 # error: package no-deps@1.0.0 not found (exit 1)
bun patch my-alias # exit 0, prints "To patch no-deps, edit the following folder: node_modules/my-alias"
Three defects in this PR were found after CI was green on 9a85dd3, and are fixed in 803787d, 39a768b and 6d84aec. The PR description lists them under Notes. CI: build 118054 passed for 9a85dd3. Build 118407 for 39a768b had one red test, |
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… name A name that selects a dependency selects the same dependency and folder as before. The dependencies that only resolve to a package with that name (npm: aliases) are a fallback for when none has it, after the version filter. So an alias of another version somewhere in the tree does not make `bun patch <name>` ambiguous, and the sort is not needed. The folder lookup returns the pair it found, so the folder, the folder name and the package always come from the same dependency.
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@test/cli/install/bun-patch.test.ts`:
- Around line 1244-1246: Update the beforeAll setup around
VerdaccioRegistry.start so it starts the registry without awaiting its IPC-based
promise, then waits for readiness with waitForPort(registry.port, 30_000).
Import and reuse waitForPort from harness while preserving the existing registry
startup flow.
- Around line 1289-1368: Replace the three parameterized for-loop test
generators around the patch argument cases with describe.each() blocks,
preserving each argument value, test name, setup, assertions, and concurrency
behavior. Keep the existing test logic unchanged while using describe.each() for
the parameterization.
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src/install/PackageManager/patchPackage.rstest/cli/install/bun-patch.test.ts
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Nothing blocking. The comments below are optional suggestions. There is no need to push a fix for them before merging.
The follow-up commits address the three points from my earlier review: node_modules_folder_for_dependency_ids now returns the pair it matched so pkg_id and the folder come from the same dependency, and the pairs/aliased split keeps an alias of another version (e.g. wrap-ansi-cjs) from turning bun patch wrap-ansi into the multiple-versions error. Beyond the inline nit, I also checked the same-package branch at patchPackage.rs:1389, which still takes pkg_id from pairs[0] — safe there because that branch only runs when every pair resolves to that package. A human look at the new selection rule is still worthwhile since it changes which folder bun patch <name> picks.
Extended reasoning...
Substantive change since the prior review: commits eb2ffca and 256be1a rework pkg_info_for_name_and_version so that direct-name matches and package-name (alias) matches are collected separately with the alias set used only as a fallback, and node_modules_folder_for_dependency_ids returns the matched IdPair so both the folder name and the returned PackageID come from the dependency actually found. I re-read the remaining branch that still uses pairs[0] (the count == pairs.len() case) and confirmed all pairs share one PackageID there, so no mismatch is possible. The only surviving finding is a coverage nit (hoisted-only tests, no isolated linker or scoped alias case). The change adds a new user-facing selection rule and a Global::crash path on unsafe alias names, so it is not simple enough to approve without a human look, but nothing found blocks it.
…e isolated linker The three argument loops become `test.concurrent.each`. New cases: a scoped alias (`@my/alias`) by alias and by package name, and prepare plus `--commit <package name>` with the isolated linker, where `node_modules/my-alias` is a symlink that `bun patch` detaches.
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A note for whoever reads the CodeRabbit summary above: its "Merge Risk" line still asks for bounded readiness handling around What I checked on main: all 33 |
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I re-reviewed the latest push and found no new bugs; the points raised earlier are reflected in the code now (fallback-not-union at patchPackage.rs:1305, the found pair returned from node_modules_folder_for_dependency_ids, isolated-linker and scoped-alias tests). Since bun patch deletes and rewrites a node_modules path that now comes from the lockfile rather than the CLI argument, a human look at that boundary is still worthwhile.
What was reviewed:
- The folder name path: every
folder_name(dep_id)return site routes throughalias_is_safe_install_target(same predicate as the hoisted installer) before the join inprepare_patchanddo_patch_commit; both callers now key the patch bypkg.name, so prepare and--commitagree. - Selection precedence: dependencies named
<name>win outright, package-name matches only fill in when the version filter leaves none, so annpm:alias of another version no longer turns a direct dependency into "Found multiple versions". - Rust lint surface: the new
ids.iter().find(...)searchesDependencyIDs, not bytes, so the byte-search lint does not apply; nounwrapon user-reachable paths. - Not verified here: I did not execute the 12 new tests (no debug build in this checkout), so their pass status rests on the PR description.
Extended reasoning...
Overview
The diff is confined to src/install/PackageManager/patchPackage.rs and test/cli/install/bun-patch.test.ts. pkg_info_for_name_and_version now buckets lockfile dependencies into pairs (dependency name matches the argument) and aliased (resolved package name matches), uses aliased only when pairs is empty after the version filter, and returns the dependency's own name as the third tuple element so the two callers join the real node_modules folder instead of the typed argument. node_modules_folder_for_dependency_ids returns the (DependencyID, PackageID) pair it actually located, closing the mismatch where the versioned multi-match branch took pkg_id from pairs[0] but the folder from whichever pair the tree walk hit first. prepare_patch now hashes pkg_name@ version for the existing-patch lookup, matching the key do_patch_commit writes.
Security risks
bun patch runs detach_module_folder_from_shared_store and overwrite_package_in_node_modules_folder against the joined path, so the last path component moving from a CLI argument to a lockfile string is the sensitive part. The new folder_name closure rejects names that fail alias_is_safe_install_target (empty, ./.. components, backslash, colon, NUL, more than one / unless scoped) and exits nonzero, which is the same gate bun install applies before creating the folder. Every return path in the function goes through that closure, and the test "refuses an alias that bun install refuses" checks both spellings of the argument and that node_modules stays empty. I did not find a route to the path join that bypasses the check.
Level of scrutiny
Moderate. The Rust change is around fifty lines with straightforward control flow, but it sits in a command that deletes and rewrites directories, and the precedence rule (name match before package-name fallback, applied after the version filter) is a behavioral contract users will depend on. Prior inline findings from earlier pushes (union vs fallback, mismatched pair, missing isolated/scoped coverage) are visibly addressed in the current tree. Two inline comments from another bot reviewer on the test file remain open and their content is not visible to me, so I am not approving over them. A defer with the verification record above is the appropriate outcome rather than silence, because the code has changed materially since my last review.
Other factors
No debug build exists in this checkout and a full build was out of proportion for this review, so the new tests were read but not executed. The tests use VerdaccioRegistry, Promise.all pipe draining, test.concurrent.each, per-test BUN_INSTALL_CACHE_DIR with a comment explaining why, and assert stdout/stderr before exit codes. The toContain assertions on the "To patch" block are substring checks on a multi-line banner, which is acceptable given the exact folder path is included. The existing bun-install-patch.test.ts and isolated-install patch tests should be unaffected since the change only alters behavior when the typed name differs from the dependency name or when multiple pairs share a version label.
The name lookup reads the resolution id of every dependency since it also matches by package name. It indexed the package list with that id after a check for `invalid_package_id` only, so one bad id in `bun.lockb`, on any dependency, was an index out of bounds. Before this branch only the named dependency's id was read, and that one panicked too (`MultiArrayList::Slice::get: index out of bounds`). Any id past the end now counts as not resolved, the same test as `is_filtered_dependency_or_workspace` in Tree.rs. The loop zips the dependencies with the resolutions, so a short resolutions buffer is not an index either.
The refused name comes from the lockfile. The message printed it raw, so a name with ESC, CR or LF wrote control characters to the terminal. `bun_fmt::quote` escapes them, as the other messages in this file do for paths. The corrupt lockfile test asserted that `--commit` does not print "To patch", which it never prints. It now checks that no patch file and no `patchedDependencies` entry were written.
… blocks The new block started a second Verdaccio and repeated the `runBun` helper of "packages whose label is longer than 1024 bytes". Both now live at file scope.
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Problem
"my-alias": "npm:dep@1.0.0", a secondbun patch my-aliasexits 0 but starts from the unpatched copy. The next--commitdrops the first patch.prepare_patchlooks upmy-alias@1.0.0. The key isdep@1.0.0.bun patch depandbun patch dep@1.0.0fail witherror: package dep not found, althoughdepis the name bun prints.pkg_info_for_name_and_version(src/install/PackageManager/patchPackage.rs:1271) compares the argument withdep.name_hashonly, which is the alias.Fix
bun patchneeds one folder.bun updateacts on every match and takes either name (src/install/update_scope.rs:453).alias_is_safe_install_targetbefore it becomes a path. A refused name is printed withbun_fmt::quote. A resolution id past the end counts as not resolved.test/cli/install/bun-patch.test.ts(18 new tests, 13 fail on 1.4.3-canary). Alsobun-install-patch.test.tsand theisolated-install.test.tspatch tests.Background
npm:alias installs a package under another name:"my-alias": "npm:dep@1.0.0"putsdepinnode_modules/my-alias.dep).bun patch <pkg>copies the package from the cache intonode_modulesfor editing.--commitdiffs it against the cache.Notes
invalid_package_idonly. With one id past the end inbun.lockb, on any dependency,bun patch --commit <name>panicked at my new line. Main reads only the named dependency's id, and panics for that one (MultiArrayList::Slice::get: index out of bounds). 803787d treats any id past the end as not resolved, the test thatis_filtered_dependency_or_workspaceuses. Two tests write oneu32in a generatedbun.lockb. Both fail on 9a85dd3, and the one for the named dependency fails on main.bun_fmt::quote. The installer's own message for the same name is still raw on main, which is the subject of install: escape control characters in resolutions, specifiers, bin names and registry error text #38631.runBun. 6d84aec moves both to file scope.bun 1.4.3-canary.1: 13 of the 18 new tests fail.bun patch no-depsprintserror: package no-deps not found, and the secondbun patch my-aliasrestores the unpatchedindex.js. The 5 that pass are controls: by alias, by alias and version, by scoped alias, the same package under both names, and a bad resolution id on another dependency (same result as main by design).bun-patch.test.ts(55 pass, run twice),bun-install-patch.test.ts(31 pass),isolated-install.test.ts -t patch(5 pass).test/js/bun/spawn/spawn.test.tson the asan lane, which this PR does not touch.wrap-ansi-cjs: npm:wrap-ansi@7in@isaacs/cliui), sobun patch wrap-ansiwould have become "Found multiple versions" where main preparednode_modules/wrap-ansi. The fallback applies after the version filter: with"my-alias": "npm:dep@1.0.0"and"dep": "2.0.0",bun patch depandbun patch dep@2.0.0selectnode_modules/dep, andbun patch dep@1.0.0selectsnode_modules/my-alias. The test "selects the dependency with that name before an alias" pins this. The sort from the first push is removed.bun patch depprints the existing "Found multiple versions" list. Each entry is a valid argument now.pairs[0]and the folder from the first match in the tree. No new test tells the two apart. The shape needs two dependencies with the same name and version label that resolve to different packages, and the registry fixtures cannot build it.bun patchdeletes and rewrites that path.prepare_patchruns even when the install step failed, so with"a/b": "npm:dep@1.0.0"(whichbun installrefuses)bun patch a/bcreatednode_modules/a/bon main. Both spellings are refused now.@my/alias), and prepare plus--commit depwith the isolated linker. I ran that test on linux only. In CI build 118054 the file ran on the Windows 2019 x64 and Windows 11 aarch64 lanes, those jobs passed, and the file is in no failure or flaky annotation. Checked by hand only, on the first push and not again after the fallback change: two aliases of the same version, and an alias that has the name of another installed package.no-deps@1.0.0applies it, the keymy-alias@1.0.0does not (exit 0, nothing on stderr).node_modules_folder_for_dependency_idsreturns the pair it found, so the folder and the package come from one dependency.bun outdatedandbun whythe either-name rule and adds a sharedalias_forhelper. It has not landed, so this PR keeps the inline compare. install: trust npm: aliased packages by the same name in bun pm trust, the installer and bun.lock #39443 does the same forbun pm trust.prepare_patchjoin asjoin(&[&folder_relative_path, name])with the typed name, leavesdo_patch_commitonname, and conflicts with this branch in both files. If it lands second, it has to use the returned folder name. If bun patch: refuse a bundled dependency as the target #43199 lands second, it has to filter thealiasedlist after the fallback.dep.name_hashcompare. The PR that lands second needs a rebase.