perf: list without forking, linear snapshot parse; build bin/git-locks from lib/ (0.4.0) - #28
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…s from lib/ bin/git-locks is now a build product: scripts/build.sh assembles it from lib/*.sh in numeric order and generates the schema module from schema/git-locks.schema.json. make build writes it; the suite refuses a committed script that is not byte-for-byte what lib/ builds. Lint runs over the built script, since the fragments do not parse alone. The list render path no longer forks per record: field_v, record_paths_v, now_v and json_paths_v are printf -v forms of the readers, so each record is parsed once (GIT_LOCKS_TRACE writes one parse line per blob and the suite counts 200 for 200). The snapshot reads cat-file --batch output with read -N instead of slicing the captured text, which was quadratic. Measured on 500 locks (macOS, bash 5.3, same store): list 6.75 s to 0.58 s; check 0.87 s to 0.28 s; show 0.85 s to 0.25 s; claim 1.0 s to 0.33 s. The README's earlier 0.07 s figures did not reproduce and are withdrawn. Version 0.4.0. Closes #24 Closes #11
📝 SummarySummary by CodeRabbit
WalkthroughChangesGit-locks implementation
Priority: ➖ Normal Estimated code review effort: 5 (Critical) | ~90 minutes Change: Refactor · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant Client
participant git_locks
participant Snapshot
participant Store
participant Transaction
Client->>git_locks: run lock command
git_locks->>Snapshot: ensure snapshot
Snapshot->>Store: read refs and blobs
git_locks->>Transaction: plan ref changes
Transaction->>Store: commit update-ref transaction
git_locks-->>Client: emit JSON result
Merge Risk: 🟠 High · up to This release reworks the core locking/semaphore engine and its snapshot-parsing performance path. Several concrete defects remain: an automated sweep of expired locks can delete a lock that was renewed just beforehand (and any locks nested under it), semaphore-guarded work can exceed its configured capacity when a zero or invalid TTL is supplied through the 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
Full details: Linked Issues checkExplanation The PR satisfies the performance requirements in [ Resolution Refactor Full details: Docstring CoverageExplanation Docstring coverage is 19.10% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 89 functions across 22 files. (6 skipped: 6 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Actionable comments posted: 12
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Inline comments:
In `@lib/050-the-snapshot.sh`:
- Line 27: Update the field serialization around fields+ and field_v so holder
values containing \x1e or \x1f cannot be interpreted as delimiters; use
associative storage keyed by OID and field name or consistently escape and
unescape both bytes. Add coverage for both control characters and run make
build.
- Line 61: Set the locale to a byte-oriented setting for the Git batch parser
around the read of body data in the snapshot script, so read -N interprets
cat-file size values as bytes rather than locale characters. Preserve the
existing short-object error handling, and add coverage for a lock with non-ASCII
holder and path under a UTF-8 locale.
In `@lib/080-families.sh`:
- Around line 18-19: Replace the per-record field reads with field_v in
lib/080-families.sh lines 18-19 for rjob and rparent, and in
lib/090-claim-planning.sh lines 91-92 for the job and expiry reads plus line 133
for the second job read. Preserve the existing variable assignments and behavior
while avoiding command substitutions so parse memoization remains available in
these hot loops.
In `@lib/090-claim-planning.sh`:
- Around line 186-231: Normalize TTL values to base 10 after digit validation
and before positivity checks or arithmetic: update claim_args for CA_TTL,
finish_record for its ttl, and cmd_sem acquire for its ttl using 10#. Ensure
plan_claim and sem_acquire_attempt receive the normalized values so leading-zero
inputs represent their decimal duration.
In `@lib/100-batch.sh`:
- Line 8: Update finish_record’s empty-record check to also require ttl and
parent to be absent, so records containing only optional fields are rejected and
state is reset before the next record is processed. Preserve the existing
handling for records with job, holder, or paths.
In `@lib/120-check.sh`:
- Line 7: Update the clock initialization near now and now_v so describe uses
the cached timestamp initialized in the parent shell: replace the
command-substitution assignment to at with a direct now_v at call, preserving
the existing cached-time behavior and output flow.
In `@lib/140-extend.sh`:
- Line 6: Update TTL_ARG arithmetic handling in the validation and
lock-extension logic to force decimal interpretation, including values with
leading zeroes such as 010 and 08. Preserve the positive-integer validation
while ensuring all subsequent TTL calculations use the decimal value.
In `@lib/150-sweep.sh`:
- Around line 20-22: Update the termination guard in plan_delete_job so it
proceeds only when the reloaded ref_oid value still equals the OID confirmed
expired before snapshot; otherwise break without calling plan_terminate.
Preserve the existing behavior for a missing ref and ensure renewed or changed
locks and their descendants are not deleted.
In `@lib/160-with.sh`:
- Line 96: Update the semaphore setup in cmd_with to validate W_SEM, W_JOB, and
W_TTL before the acquisition call near the wait validation; require W_TTL to be
a positive base-10 integer, matching cmd_sem acquire’s validation, so invalid
arguments cannot create non-live slots or start the command.
- Line 111: In cmd_with, define with_release_all and install the INT/TERM
cleanup traps immediately after recording sem_record and before
acquire_with_wait lock. Preserve the existing cleanup behavior while ensuring
signals during lock acquisition release the recorded semaphore slot.
In `@lib/170-semaphores.sh`:
- Line 148: Validate the holder value before constructing the record in
sem_acquire_attempt, rejecting any carriage return or newline characters in
holder and returning the existing invalid-input failure path. Ensure validation
occurs before the printf that builds the schema/semaphore/job/holder record,
without changing other field handling.
In `@lib/990-main.sh`:
- Line 24: Update the version|--version branch in the command dispatcher to
require zero additional arguments before returning the version response,
matching the argument validation used by cmd_store and cmd_schema; reject extra
arguments instead of exiting successfully.
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ℹ️ Review info
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📒 Files selected for processing (28)
.github/workflows/ci.ymlCHANGELOG.mdCONTRIBUTING.mdMakefileREADME.mdbin/git-lockslib/000-prelude.shlib/010-json.shlib/020-errors.shlib/030-time-refs-records.shlib/040-the-store.shlib/050-the-snapshot.shlib/060-the-transition-plan.shlib/070-refusals.shlib/080-families.shlib/090-claim-planning.shlib/100-batch.shlib/110-release.shlib/120-check.shlib/130-list-show-ttl.shlib/140-extend.shlib/150-sweep.shlib/160-with.shlib/170-semaphores.shlib/180-schema-marker.shlib/990-main.shscripts/build.shtest/test.sh
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📜 Review details
🧰 Additional context used
🪛 checkmake (0.3.2)
Makefile
[warning] 7-7: Required target "all" is missing from the Makefile.
(minphony)
[warning] 7-7: Required target "clean" is missing from the Makefile.
(minphony)
🪛 LanguageTool
README.md
[uncategorized] ~419-~419: The official name of this software platform is spelled with a capital “H”.
Context: ...ema attached, from the release job in .github/workflows/ci.yml. So a release is: bum...
(GITHUB)
[style] ~439-~439: Consider an alternative for the overused word “exactly”.
Context: ...ite checks that the committed script is exactly what lib/ builds, so a lib/ change ...
(EXACTLY_PRECISELY)
[style] ~443-~443: Consider using “who” when you are referring to a person instead of an object.
Context: ...nd time-bounded. Nothing stops a writer that never claimed, and nothing renews a res...
(THAT_WHO)
🪛 zizmor (1.30.0)
.github/workflows/ci.yml
[warning] 1-56: overly broad permissions (excessive-permissions): default permissions used due to no permissions: block
(excessive-permissions)
🔇 Additional comments (19)
lib/070-refusals.sh (1)
3-28: LGTM!lib/110-release.sh (1)
3-93: LGTM!lib/130-list-show-ttl.sh (1)
23-23: 🗄️ Data Integrity & IntegrationThe dispatcher calls
ensure_snapshotbeforecmd_listandcmd_sweep. The command substitution inheritsSNAP_LOADED=1and the snapshot arrays, sojob_refsdoes not load a second snapshot.lock_lineanddescribeuse the same parent snapshot. Sweep's latersnapshotcall is part of its transaction retry and rechecks the ref before writing. The proposed changes do not address a real mismatch..github/workflows/ci.yml (1)
42-42: LGTM!README.md (1)
419-419: LGTM!Also applies to: 433-433, 439-440, 447-447
lib/000-prelude.sh (1)
1-156: LGTM!lib/180-schema-marker.sh (1)
1-1: LGTM!scripts/build.sh (1)
1-21: LGTM!test/test.sh (1)
1029-1054: LGTM!CHANGELOG.md (1)
7-15: LGTM!bin/git-locks (2)
369-369: The source finding also applies to this generated line.Fix
lib/050-the-snapshot.sh, then runmake build.
403-403: The source finding also applies to this generated line.Fix
lib/050-the-snapshot.sh, then runmake build.CONTRIBUTING.md (1)
3-3: LGTM!Also applies to: 15-16
Makefile (1)
2-9: LGTM!lib/010-json.sh (1)
1-73: LGTM!lib/020-errors.sh (1)
1-16: LGTM!lib/030-time-refs-records.sh (1)
1-69: LGTM!lib/040-the-store.sh (1)
1-28: LGTM!lib/060-the-transition-plan.sh (1)
1-76: LGTM!
…eep guard, with traps From the automated review of #28, each with a test written first: - ttl values are decimal everywhere (claim, batch, extend, sem acquire, with): 010 was octal eight in arithmetic and 08 was an error. - Parsed record fields are stored whole, keyed by record and field name, so no byte in a holder can read as a delimiter; the first cut of this branch joined them with control bytes. A holder is one line; sem acquire and with refuse a newline in it as claim already did. - A batch record with only parent: or ttl: was skipped as empty and its parent leaked into the next record; it is malformed now. - sweep deletes only the record it saw expire; a lock renewed between its read and its transaction is left alone (forced with the after-read gate). - with --sem validates its arguments before acquiring anything, and arms its release traps before the first acquisition, so a TERM during the wait for the path lock gives back the slot already taken. - check reads the clock in the parent shell; hot loops in families and claim planning use field_v; version refuses extra arguments. - Non-ASCII holders and paths are covered under a UTF-8 locale (the script already exports LC_ALL=C, so read -N counts bytes).
All twelve findings addressed in bd8f450 with tests written first; each thread replied to and resolved, and the reviewer acknowledged each fix on the follow-up commit.
1 participant
Two roadmap items, one PR, because the split is what makes the perf work reviewable module by module.
#11:
bin/git-locksis built fromlib/lib/000-prelude.sh…lib/990-main.sh, one module per section marker of the old single file, split mechanically (the modules are the old file's sections verbatim; the only diff in the first build was one marker comment).scripts/build.shconcatenates them in numeric order and generates the schema module fromschema/git-locks.schema.json, so the schema has one copy in the repository.make buildwritesbin/git-locks. It stays committed: it is whatmake install, the release asset and a raw-file curl want.cmpof the committed script against a fresh build, so alib/edit without a rebuild fails pre-push and CI.scripts/build.shis linted.#24:
listcostfield_v,record_paths_v,now_v,json_paths_v:printf -vforms of the readers. The render path uses only those, so a list line forks nothing and each record is parsed once in the parent shell.GIT_LOCKS_TRACEnow writesparse <oid>per record; the suite asserts 200 parses for a 200-lock list.cat-file --batchparse used${out:pos:size}, which copies fromposon every call and is quadratic in the store. It now reads withread -N.remainingin a list is against the same instant.Measured on 500 locks (macOS, bash 5.3, same store, before → after):
listcheckshowclaimThe README's earlier "0.07 s" figures did not reproduce against that store on 0.3.2 and are withdrawn in the changelog.
Review follow-up (bd8f450)
The automated review found twelve things, ten of them pre-existing; each is fixed with a test written first: decimal ttl everywhere (
010was octal), parsed fields keyed by record and name (no delimiter to inject),batchrejects a record with onlyparent:/ttl:,sweepnever deletes a lock renewed after it was seen expired (forced schedule),with --semvalidates before acquiring and arms its traps before the first acquisition (TERM during the wait releases the slot),checkreads the clock in the parent shell,field_vin the remaining hot loops,versionrefuses arguments, and non-ASCII holders and paths are covered under a UTF-8 locale.Version 0.4.0. 333 checks green, lint clean.
Closes #24
Closes #11