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WalkthroughThe install temporary-directory fallback now advertises its actual cache-based path. A Linux-only test reproduces the cross-filesystem fallback and verifies that an offline ChangesTemporary-directory fallback
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Full details: Description checkExplanation The description explains the problem, cause, fix, verification method, regression test, and issue context. Although it does not use the exact template headings, it provides the required information in sufficient detail. Comment |
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Actionable comments posted: 1
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Inline comments:
In `@test/cli/install/bun-install-lifecycle-scripts.test.ts`:
- Around line 307-315: Harden the EXDEV fallback test around canForceExdevTmpdir
and setupTest(): verify /dev/shm is writable before enabling the test, and after
setupTest() assert that statSync(shmTmp).dev differs from
statSync(packageDir).dev before invoking bun install, so the test proves
renameat() crosses devices and exercises the intended fallback.
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src/install/PackageManager/PackageManagerDirectories.rstest/cli/install/bun-install-lifecycle-scripts.test.ts
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I reviewed this PR and didn't find any bugs. Since the description explicitly asks maintainers to pick between this minimal fix and the broader redesign in #38080, a human should make that call before merging.
What was reviewed:
- Traced every consumer of
TemporaryDirectory.name— all three uses are inensure_temp_node_gyp_script_run(PATH entry,BUN_WHICH_IGNORE_CWD/npm_config_node_gyppath); no other call site relies onnamebeing$TMPDIR. - Confirmed the Windows-only
TemporaryDirectory.pathfield is unaffected — it's derived fromget_fd_path_z(tempdir)on the actual handle, so it already reflected the fallback. - The
dirname_store().append(...)interning matches the existing pattern used forglobal_link_dir_pathin the same file.
Extended reasoning...
Overview
The PR fixes a mismatch in get_temporary_directory_run (src/install/PackageManager/PackageManagerDirectories.rs): when the $TMPDIR → cache renameat() probe fails (EXDEV or unwritable), the function switches handle to <cache>/.tmp but previously left name pointing at $TMPDIR. ensure_temp_node_gyp_script_run writes the shim through handle but builds the lifecycle-script PATH entry from name, so lifecycle scripts calling node-gyp would exit 127. The fix derives name from cache_directory_path + "/.tmp" when the fallback engages, interning it in the process-lifetime dirname store. A Linux-only test forces the EXDEV path via /dev/shm.
Security risks
None identified. The change only affects which directory string is placed on the lifecycle-script PATH; both candidates are directories bun already fully controls (the tempdir it just created). No new untrusted input is parsed.
Level of scrutiny
Moderate-to-high. This is production package-manager code that runs during every bun install with lifecycle scripts, and the PR description explicitly presents this as one of two competing approaches (vs #38080's stable $cache/bin/node-gyp redesign). That is a design decision a maintainer should make, not an automated approval.
Other factors
- I grep'd all consumers of
get_temporary_directory; every site exceptensure_temp_node_gyp_script_runuses only.handle(the fd), so this change cannot regress them. The Windows.pathfield is already derived from the fd, so it was never wrong. - There are two outstanding bot comments not yet addressed: the comment-cop flag on the 5-line explanatory comment, and the CodeRabbit suggestion to assert
statSync(shmTmp).dev !== statSync(packageDir).devinside the test (the current guard compares againstos.tmpdir(), which is wherepackageDiroriginates viaverdaccio.createTestDir, so it's a reasonable proxy — but the direct assertion would be tighter). - Given the open design question (#38080 vs this PR) and the unaddressed review feedback, deferring rather than approving.
…back When renameat() from $TMPDIR into the install cache fails (EXDEV or an unwritable $TMPDIR), getTemporaryDirectory repoints the directory handle at <cache>/.tmp but kept reporting $TMPDIR as its name. The node-gyp lifecycle shim is written through the handle but advertised on PATH via the name, so the PATH entry pointed at a directory that does not exist and lifecycle scripts spawning node-gyp exited 127. Derive the advertised name from the cache path when the fallback engages so PATH and BUN_WHICH_IGNORE_CWD match where the shim actually lives.
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CI on the current head (cc0159e) is red only on lanes this diff does not touch: a pre-existing require-cache leak-test timeout on the asan lane (also fails on main) and several install/fetch tests that passed on retry. The lifecycle-scripts file this PR changes is green. Not retriggering, since the pre-existing failure would fail again. |
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LGTM — the follow-up commit tightened the comment and added the cross-device assertion, so the test now proves it exercises the fallback path.
What was reviewed:
namerecomputation only fires whentried_dot_tmpis set; the non-fallback path is byte-identical to before, andcache_directory_pathis guaranteed populated by theget_cache_directorycall at the top of the function.- Windows
pathfield was already derived from the live handle viaget_fd_path_z, so it needed no matching fix. - Test: skip guard probes
/dev/shmwritability and device id,npm_config_node_gypkeeps it offline, pipes drained concurrently, cleanup infinallybefore assertions can fail; themkdtempSyncdeviation is required to pin the mount point.
Extended reasoning...
Overview
The PR fixes a bug in get_temporary_directory_run (src/install/PackageManager/PackageManagerDirectories.rs) where, after falling back from $TMPDIR to <cache>/.tmp on EXDEV or an unwritable tempdir, the returned TemporaryDirectory.name still pointed at the original $TMPDIR. Since name is what ensure_temp_node_gyp_script_run uses to build the lifecycle-script PATH entry and BUN_WHICH_IGNORE_CWD, the shim was written to one directory but advertised at another, producing node-gyp: command not found. The fix is 12 lines: when tried_dot_tmp is true, join cache_directory_path with .tmp via resolve_path::join::<Auto> and intern the bytes in the process-lifetime dirname_store (mirroring the global_link_dir pattern), wrapped in bun_core::handle_oom. A Linux-only regression test forces EXDEV by pointing TMPDIR at /dev/shm while the cache stays on the harness tempdir's filesystem.
Security risks
None identified. The change only affects which directory string is stored in TemporaryDirectory.name after a fallback that Bun itself initiated; both candidate directories are already trusted (Bun creates and writes into both). No user-controlled input reaches the new join. The test stubs npm_config_node_gyp with a local script and restricts PATH, so no network or real node-gyp is invoked.
Level of scrutiny
Low-to-moderate. The Rust change is tightly scoped: the non-fallback branch returns the exact same temp_dir_name as before, so only installs that were already broken (EXDEV fallback) see any behavior change. get_cache_directory(manager) runs at function entry and populates cache_directory_path before it is read here. The Windows-only path field is separately derived from get_fd_path_z on the actual tempdir handle, so it was already correct and needed no parallel fix. Allocation goes through handle_oom; the &'static lifetime comes from the dirname store, matching existing call sites.
Other factors
The test follows the harness conventions the repo review rules call out: test.concurrent, skipIf with a computed guard that also verifies /dev/shm is writable, Promise.all draining stdout/stderr/exited, output asserted before exit code, cleanup in try/finally registered before the spawn's assertions, and an in-test assertion (statSync(shmTmp).dev !== statSync(packageDir).dev) proving the precondition so the test cannot vacuously pass. The mkdtempSync("/dev/shm/…") deviation from tempDir is deliberate and necessary — the test must control the mount point. No CODEOWNERS entry covers these paths. The earlier COMMENTED review's feedback was addressed in cc0159e (shortened comment, writability probe, device-mismatch assertion); the remaining self-resolved inline threads are bot-authored and there is no outstanding human CHANGES_REQUESTED.
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Problem
bun installlifecycle scripts that spawnnode-gypfail withbun: line 1: node-gyp: command not found/ exit 127 when$TMPDIRand the install cache live on different filesystems (typical: tmpfs/tmp, cache on~/.bun). Fixes install: lifecycle node-gyp stub advertised under $TMPDIR after EXDEV fallback to cache/.tmp #38079.get_temporary_directory_run(src/install/PackageManager/PackageManagerDirectories.rs:152) probes$TMPDIRwith arenameat()into the cache. On EXDEV (or an unwritable$TMPDIR) it repointshandleat<cache>/.tmpbut leavesnameas$TMPDIR.ensure_temp_node_gyp_script_run(src/install/PackageManager.rs:1207) writes thenode-gypshim throughhandlebut builds thePATHentry andBUN_WHICH_IGNORE_CWDfromname, so the advertised directory never exists.Fix
.tmpfallback engages, derivenamefrom the cache directory path (<cache>/.tmp) instead of keeping$TMPDIR, so every path built fromnamematches where the shim actually lands.global_link_diruses for&'staticpaths.$TMPDIRat a/dev/shm(separate tmpfs mount) directory while the cache stays on the main filesystem; it fails with exit 127 on current bun and passes with this change. The standalone repro from the issue also passes (fake-node-gyp ran, exit 0).$cache/bin/node-gyp, installing node-gyp into the cache on first miss). It is closed in favor of this minimal fix, which keeps the existing hashed-shim design. The closing comment on install: serve lifecycle node-gyp from the install cache after EXDEV #38080 has the comparison: both fix the repro on current main (731aa92), but the redesign changesnpm_config_node_gyphandling, rewrites a launcher shared by concurrent installs, and makesget_fd_path_zfatal on Unix.Background
renameat()s them into the cache, which requires both to be on one filesystem; when they are not, bun falls back to a.tmpdirectory inside the cache.node-gypshell shim (added in fix(install) make sure node-gyp is available during lifecycle scripts #7622) that is appended to the lifecycle scripts'PATH, so packages whose install scripts invokenode-gypwork without a global install.BUN_WHICH_IGNORE_CWDtells bun'swhichimplementation to skip the shim directory when the shim itself runsbun x node-gyp, preventing the shim from resolving to itself.no test proof · iteration 1 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/cli/install/bun-install-lifecycle-scripts.test.ts