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fix: lock local state files and harden CLI validation - #182
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe changes add advisory locking for local persistence, introduce FastGPT argument validation, change completion conflict handling, stream per-item summarize results, and route CLI and MCP site-preference updates through a locked read-modify-write API. ChangesCLI and local persistence
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to Concurrent cache reads and writes can discard a freshly fetched cache entry when an expired entry is removed, causing avoidable cache misses and repeated requests. This should be corrected before merge. Sequence Diagram(s)sequenceDiagram
participant Stdin
participant SummarizeCommand
participant SummarizeAPI
participant JSONLOutput
Stdin->>SummarizeCommand: provide one URL
SummarizeCommand->>SummarizeAPI: request summary
SummarizeAPI-->>SummarizeCommand: success or error
SummarizeCommand->>JSONLOutput: print one JSON record
SummarizeCommand-->>Stdin: return batch status
🚥 Pre-merge checks | ✅ 4 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (4 passed)
Full details: Out of Scope Changes checkExplanation The linked issue covers concurrent site-preference updates only. History locking, summarize filtering, FastGPT validation, and completion conflict handling address separate objectives not represented in the provided linked issues.
✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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| ensure_parent_dir(&path)?; | ||
| write_json(&path, preferences) | ||
| let mut file = fs::OpenOptions::new() | ||
| .create(true) |
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When the preferences file does not yet exist, .create(true) makes an empty file visible before the exclusive lock is acquired. A concurrent site-pref list can open that file, acquire its shared lock first, read an empty string, and fail JSON parsing instead of observing either the default or updated preferences. Use a sidecar lock that can be acquired before creating the data file, or make the locked reader treat an empty file as the pre-update default.
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Actionable comments posted: 2
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Inline comments:
In `@src/local.rs`:
- Line 334: Update the cache write flow around the file open and exclusive lock
acquisition so opening does not truncate the file first. After the exclusive
lock is acquired, call set_len(0) and rewind() before serialization, preserving
the existing write behavior while preventing readers from observing a
prematurely truncated cache.
- Line 105: The cache lookup using open_locked_shared must not unlink an expired
entry while holding the shared lock, because cache_put may be waiting to acquire
an exclusive lock on the same file. Return Ok(None) without deleting the expired
pathname, or re-check the expiry under an exclusive lock before performing
deletion.
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.github/workflows/ci.yml.github/workflows/coverage.yml.github/workflows/issue-163-final-review-sweep.yml.github/workflows/npm-publish.yml.github/workflows/release.yml.github/workflows/security.ymlCargo.tomlsrc/cli.rssrc/local.rssrc/main.rstests/integration-cli.rs
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| } | ||
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| let raw = fs::read_to_string(&path).map_err(|error| { | ||
| let mut file = open_locked_shared(&path)?; |
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When an expired entry is read concurrently with cache_put for the same key, this shared lock makes the writer wait after it has opened the same inode; the reader then removes the pathname on line 122, releases its lock, and the writer successfully writes the fresh value into the now-unlinked inode. On Unix the subsequent cache lookup therefore misses the response that was just cached. Avoid unlinking while holding only the shared lock—for example, acquire an exclusive lock and revalidate before deletion, or retain the expired file so the writer can truncate it in place.
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all five open issues in one go. two are concurrency bugs in the local state files, three are validation and output contracts.
what was wrong
site-pref setcalls could silently drop each other's domains, and concurrent searches could interleavehistory.jsonllines into unparseable garbage. every local file access is now under an advisory lock, and site-pref mutations run read-modify-write under one exclusive lock ([bug] Concurrent writes to site-preferences.json can silently overwrite and lose domain preferences #176, [bug] Unlocked concurrent appends to history.jsonl can interleave and corrupt JSON lines #177)summarize --filterdied on the first bad item with zero output whileextract --filterstreams per-item envelopes. summarize now streams{"input", "ok", ...}lines and ends with the same aggregate failure + exit 1 (Inconsistent failure semantics between summarize --filter and extract --filter #178)fastgpt --web-search falsesailed through to an upstream that does not support it. rejected client-side with the reason (FastGPT accepts --web-search false despite being unsupported by upstream API #179)--generate-completionwith a subcommand exited 1 through manual checks. it goes through clap's conflict path now, so exit 2 like every other usage error (Top-level --generate-completion exits code 1 instead of clap usage error code 2 when used with a subcommand #180)proof
cargo fmt --all -- --checkcargo clippy --locked --all-targets -- -D warningscargo test --locked: 214 unit + 89 integration, all green on a Linux boxFixes #176, #177, #178, #179, #180.
Summary by CodeRabbit
New Features
summarize --filternow outputs one JSON record per item and reports failures individually.Bug Fixes
fastgpt.