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gitmine: a committed filename can no longer be read as commit metadata (#433 by @pt-act) - #469
Lands #433 by @pt-act: every git log --name-only consumer in the history miners now reads one NUL-framed stream (forEachGitLogRecord), so a committed filename can no longer be read as commit metadata.
Before this, five consumers framed the stream line by line and treated a __C__ prefix as the record marker. A file whose name begins with those bytes, or contains a newline, could be read as an author or a date. On @pt-act's hostile fixture, --owners analysed 8 of 11 files and credited files to an email that appears in no commit. The fix is one reader with whole-field sentinels and raw paths (core.quotepath=false), plus the --no-ext-diff --no-textconv hardening in one place.
This branch carries @pt-act's 19 commits unchanged (through b8d4a73), then:
Review: on hostile repos (CR/LF, non-UTF-8, marker-prefixed names, odd emails, renames, deletes, merges) the answers match git log. On 6 in-sample repositories, 48 of 48 outputs are byte-identical to main. The one-time cold walk for the scheme bump costs about 0.3 s.
Git history analysis now correctly handles filenames containing unusual characters, improving ownership and churn results. Author-based ownership attribution is preserved, including for commits with empty author emails.
Previously cached history data is recomputed once after the update.
Tests
Added regression coverage for unusual filenames, merge attribution, and history-analysis consistency.
Documentation
Updated the documented gate-script count from 729 to 730.
…treams
The git-porcelain-framing work (specs/git-porcelain-framing, audit finding #4)
re-frames every `git log --name-only` consumer onto NUL-delimited fields, where an
EMPTY field is the record boundary. The byte reader that needs is the sibling of
readByteSafeLine, not the line reader itself: -z terminates every --format field
and every path with NUL, so a zero-length field is a SUCCESSFUL read here, and
only end-of-stream with nothing read returns false.
Same parity contract as the line reader (one fgetc per byte, EOF as an int
sentinel distinct from every byte value, the only narrowing explicit through
`unsigned char`). Kept a separate function rather than a delimiter parameter on
the line reader because the two delimiters answer different questions — "where
does this line end" vs "is this field the record boundary" — and a caller that
confused them would read a hostile filename as commit metadata. The line reader
stays exactly as it is; its stdio-request-cap deliberations are unaffected.
No caller yet: the shared parser that uses this lands next.
…on it
Audit finding #4. Every `git log --name-only` consumer in this file framed its
stream with a LINE-based reader and a `__C__` marker matched as a line PREFIX —
three spellings across five sites — so a path whose name begins with the marker
bytes was read as commit metadata. Measured on the hostile fixture (a repo whose
files include `__C__`, `__C__x|1694000000`, `__C__ 1694000000`, `a<LF>b.cpp`,
`q"uote.cpp`, `sp ace.cpp`, `back\slash.cpp`, `pi|pe.cpp`): the file
`__C__x|1694000000` was read as a HEADER carrying author `x`, and every path
after it in byte order was attributed to that author — five real files owned by
an email that appears in no commit. The exact-marker file `__C__` was read as a
record boundary and the record after it lost its attribution; the forged email
itself leaked out as a phantom path row. A C-quoted `a\nb.cpp` never resolved to
its real path at all.
One reader now parses the stream for all five consumers:
`git log -z --name-only --format=%x00__C__%x00%ae%x00%at%x00%ct`. Fields and
paths are NUL-terminated and RAW (core.quotepath=false: no C-quoting, so any
POSIX-legal filename round-trips byte-exact), and the marker is a WHOLE-FIELD
sentinel a path can never spell. The five consumers — gitLogFileSets,
gitLogNameOnlyRaw, gitFileCommitCountsInDayWindow, gitLogDecayedFileMining,
gitFileAuthors — become visitors over forEachGitLogRecord; their three command
shapes collapse into the one gitLogRecordsCmd, which is also where train 28's
--no-ext-diff --no-textconv hardening now rides, once, instead of on five lines
that could drift apart. The K51 walk-status contract (unread/notRun/exitCode) is
carried on the shared GitLogWalk and applied by the reader itself, so it
survives the migration unchanged.
The layout this parser reads is pinned in
specs/git-porcelain-framing/evidence/layout-pin.md (derived empirically, not
from git's documentation: the '\n' before a commit's first path and the
end-of-stream unterminated field are implementation details, and
test/gitframingcheck.sh re-pins them with a raw-stream digest).
markWalkUnread/noteWalkExit lose their last caller here; they are removed with
the rest of the dead code in a follow-up commit.
…e first draft read as a boundary
Under `git log -c -z --name-only`, a merge commit's combined diff is preceded by ONE MORE empty
field than a regular commit's name list: a regular commit follows its metadata directly with a
'\n'-prefixed first path, while a merge follows with a prefix empty and then BARE paths. The first
migration draft treated every empty field as the record boundary, so a merge's prefix empty closed
the merge as a pathless record and its combined-diff files — precisely the files `-c` exists to
recover, the "evil merge" content train 28 fixed at the COMMAND level — were dropped on the floor
by the new parser.
Measured on the pre-fix binary: mergechurncheck's merge-only file lost its --owners row entirely
(mergeonly.cpp top=''), the merge's author vanished from shared.cpp's author set (2, want 3), and
--for's churn= lens read '' for the merge's function. The fix is ONE field of lookahead: an empty
field ends the record and opens the next iff the field AFTER it is the marker (or the stream ends);
any other empty is a merge prefix, skipped but counted. The count also decides the first path's
'\n': a regular commit's first path carries git's separator (empties == 0), a merge's arrives bare
after its prefix (empties == 1), so the strip applies to exactly one of the two shapes.
The one collision left is disclosed, not papered over: a merge whose FIRST combined path is a file
literally named `__C__` reads as pathless, because its prefix empty is followed by the
marker-spelled path — the same collision class the line frame had, at the same severity. Pinned in
test/gitframingcheck.sh's commentary with its observable (the merge's files lose their attribution;
a pathless phantom record with no metadata is emitted and every consumer no-ops on it). The full
fix is a format sentinel change — follow-on spec material.
…ad as commit metadata
The gate the porcelain-framing lane promised (commit 2 said
"test/gitframingcheck.sh re-pins them with a raw-stream digest"; this is that
file). Its fixture is an 11-commit history whose files are named to attack the
old LINE frame: `__C__`, `__C__x|1694000000.cpp`, `__C__ 1694000000.cpp`,
`__C__.cpp`, `q"uote.cpp`, `sp ace.cpp`, `back\slash.cpp`, `pi|pe.cpp`,
`--dashdash.cpp`, `a<LF>b.cpp` — with the hostile names sorting BEFORE the
indexed files they must not corrupt. It carries both merge shapes the boundary
rule turns on: a name-bearing merge whose first combined path is an ORDINARY
file (the one-field lookahead must attach it) and a merge whose first combined
path is the marker-spelled file itself — the disclosed collision, pinned rather
than papered over.
Red first: on the pre-change binary the gate fails 12 arms, with the forgery
measured where it happened (files="8" of 11 indexed, five files owned by an
author email that appears in no commit, zeta.cpp's top owner flipped to
quiet2@x.com, the newline file's churn lost entirely).
Arms: (a) the spoof is neutralized — every row names its true author and the
forged email appears nowhere; (b) the newline filename round-trips as ONE path
(churn=1, owned, no phantom rows for the split halves); (c) the exact-marker
file is a path, never a record opener; (d) the honest tree is byte-identical to
a golden recorded from the PRE-CHANGE binary over owners/hotspots/cochange; (e)
the marker literal lives only inside the shared helper. Then the raw-stream
digest plus the 13 NUL-delimited marker-spelled fields (11 record openers + 2
paths), the merge shapes (with the two miners' disagreement on the collision
pinned as BY DESIGN), author-not-committer, non-vacuity, determinism, an oracle
that re-derives the tool's churn from git's own stream, the 2.43.0 git floor,
and a shimmed git that rejects -z: the reader must degrade HONESTLY — non-zero
exit, no fabricated rows, "git unavailable / no history" on stderr — rather
than answer from an unframable stream.
The fixtures are fresh mktemp paths every run, and that is load-bearing beyond
tidiness: the tool memoizes its history walks under $TMPDIR/ripwire keyed on
(repo, HEAD, window) with a path-derived repo key, so a fixed fixture path
would let a previous run's cached churn answer this run's questions. A fresh
path is a cold cache: every number in the gate is computed, never remembered.
Registered in regression.sh's absorb loop (between gitenvhermeticcheck and
githardencheck). The published gate count is the generator's build product, so
docs/gatecount_build.py rewrote the three marked sites 703 -> 704; gatecountcheck
and manifestcheck agree.
…e moves to 4
Three pieces of finishing work on the src side of the porcelain-framing lane.
The migration left one artifact behind: gitLogRecords, the collecting form of
forEachGitLogRecord that kept every record in a vector "for the one consumer
that keeps every record". There is no such consumer — the five readers are all
visitors now, and nothing in the tree calls it. It goes, and with it the
GitLogWalk::records member it alone used: the walk's contract is its exit
status (unread/notRun/exitCode — the K51 "a prefix is not an answer" rule,
which the shared reader now applies itself), and the struct's own comment
already said so. What is left is exactly what the streaming design needs: one
record in memory at a time.
The same migration orphaned the two helpers that used to carry that contract
into the raw stream: markWalkUnread and noteWalkExit, whose last callers lived
in the old collecting walk (baseline src/gitmine.h:1614-1661). The shared
reader now applies the rule itself, and every consumer reads
unread/notRun/exitCode straight off the walk — so nothing calls them. A helper
that lost its last caller is dead code, and on this tree that is a GATING
quality finding: --quality-delta reports it preexisting-worse (the symbols were
live at baseline), and preexisting-worse gates when major. Leaving them defined
to be tidied up later is precisely what the gate exists to refuse, so they go
here, in the commit that took their callers away.
And the cache that holds the walk's output moves with it: kQChurnCacheScheme
3 -> 4. On a repository whose committed paths spell the marker bytes, carry a
newline, or sort after a path that does, the OLD reader's stream was corrupted,
so a blob written by a pre-lane binary would keep serving that corrupted stream
to a fixed one until HEAD moved — the same wrong-answer-from-cache as scheme 2
(the merge-blind command), one layer down: there the COMMAND changed under an
unchanged key, here the PARSE did. Neither is visible to the key, which is why
this bump is manual. On ordinary trees the two readers' streams are
byte-identical (the lane's golden arm), so the bump costs one cold walk per
repository and changes no answer.
Verification: --quality-delta on this tree reports gating="0" — the lane adds
no blocking quality findings. gitframingcheck, mergechurncheck, churnjoincheck,
qchurncheck, qchurnmemocheck, qschemetripcheck and evictioncheck all pass on
the rebuilt binary.
…e consequence
The lane's user-facing entry: what the defect was (a committed filename read as
commit metadata, with the measured numbers from the hostile fixture), what the
one shared NUL-framed reader changes for every POSIX-legal filename, the
golden that proves ordinary trees are untouched, and the one case disclosed
rather than fixed (a merge whose first combined path is the marker-spelled
file), whose full fix is a follow-on spec's format sentinel change.
The kQChurnCacheScheme 3 -> 4 move is stated here too, in the same sentence
shape 0.6.8 used for its own 2 -> 3: what a pre-lane blob would keep serving,
and what the upgrade costs.
… goes
PR #433's style leg (clang-tidy 22, bugprone-use-after-move) reads the walk loop's hand-over of
the held lookahead as a second use of a moved-from object: the slot is moved at the top of one
iteration and moved again in a later one, with the reassignment that makes that safe sitting
between them where no analyzer can prove the correlation with the haveLookahead flag. A swap is
no better — it reads the slot too, so the checker relocates the finding to the path append below.
The fix is a COPY: the slot is a reusable buffer, the two writers each assign a FRESH value
before they set the flag, and no read ever sees a moved-from slot. It runs once per record
boundary — and once per a merge's prefix empty — against a walk that spawns a git child per run,
so it costs nothing measurable.
The same loop carried a `haveLookahead ? … : fields.next( next )` at the empty-field check that
could never take its true branch: the top of the loop consumes the held field and clears the flag
before any field is examined. Removed, with the invariant stated in a comment so it is not
"restored" — defensive code for an invariant the loop does not have is how the move got there.
Behavior-preserving: the only difference is the slot's post-hand-over value, which no read can
observe — the flag is cleared here and every reader of the slot is gated on it. The framing gate
runs byte-identical on the finished state (same 35 arms, same digest pin, same golden). A
bisecter reaching this commit is green on the style leg and still red on memguardcheck's B21
until the next commit lands the abandon hook.
… byte
The migration to the NUL-framed reader narrowed the walkers' stop contract. The old line readers
checked the abandon flag before every LINE; the field reader checked it only between FIELDS. For
a stream that actually delivers NUL-terminated fields the two are equivalent, but a stream whose
fields never arrive — a git answering in its default format, or a test shim streaming bare lines
— has ONE unterminated field: the between-fields check never runs, and the read parks inside
that field until end-of-stream instead of stopping at the next unit.
Measured on the memory-guard fixture (memguardcheck B21): the pre-migration binary refused in
2s; the migrated reader blocked for the full 6s stream (the arm's limit is 4s). The flag is now
polled once per byte inside readNulSafeField itself, which is where the old line reader's check
lived. When it flips, the partial field is dropped and false is returned — which the caller
already reads as end-of-stream, so it closes the pipe and that ends the child. false is ALSO
end-of-stream, so a caller that must tell the two apart consults the flag itself, as the walkers
already do at the top of their loop. After the fix the same arm refuses in about a second, faster
than the line reader it replaces, because the poll is per byte rather than per line.
The reader's contract is unchanged on healthy streams: the parameter defaults to null, the
existing callers pass nothing, and the flag's load is relaxed — it is a cancellation signal, not
a publication.
…reads a single physical line
gateexitcheck's G2 joins backslash-continuation lines into logical lines and flags a logical line
containing `&& ok … || no …` only when it is a SINGLE physical line — the idiom is fine wrapped,
because then the reader sees the verdict's shape, and a one-liner is what reads as an accident.
Arm 5's files= verdict was a one-liner; it wraps now, matching the verdicts around it. Test-only.
…e host's timezone, not git
PR #433's gitframingcheck failure was read at first as git-version drift (CI's 2.55/2.56 against
the 2.52 the pin was recorded on). It is not: building git 2.56.0 from source and running the
fixture under it reproduces the pinned digest EXACTLY, byte for byte. The variable is the
machine's timezone. The fixture's dates are naive strings ("2026-06-01T12:00:00"), and git reads
a naive GIT_AUTHOR_DATE in the local zone, so every %at/%ct moves with the host: the same
fixture reads a823b914… under WEST and 9a112638… under UTC, on both 2.52 and 2.56. CI's runners
are UTC; the recording machine was not.
So the fixture was never hermetic, and both of its machine-facing pins moved together: the
raw-stream digest (arm 2) and the honest-tree golden (arm d), whose at= is the fixture's HEAD sha
and therefore its commit epochs. The gate now exports TZ=UTC before it builds anything, the
digest pin is the UTC reading, and the golden is re-recorded under UTC from the pre-change binary
— with the recording procedure proven first by reproducing the committed golden byte-for-byte
under the machine's own zone. The new golden differs from the old one in the at= values alone;
every churn, author, share and ranking is identical, which is what a uniform shift must produce.
Verified across the axes the failure lived on: ALL PASS under an ambient TZ=Asia/Tokyo, under
TZ=UTC, under the machine default, and under both git 2.52.0 and the locally built 2.56.0.
The pin lives HERE rather than in test/lib/clean-env.sh: that file is sourced by gates whose own
fixtures (mergechurncheck and its 2026-06 dates) were derived on a non-UTC machine, and shifting
them is a separate change with its own re-derivation. Those gates carry the same latent defect;
the sweep for them is follow-up work, named here so it is not forgotten.
…e five consumers
crashsweepcheck's S2 static scan requires every popen/open/fdopen site in src/ to match an
inline registry row (file, function, kind, count, reason) — stale rows fail too. The lane's
five-consumers-to-one-reader refactor moved all five git-log walks onto forEachGitLogRecord's
single popen, so five rows went stale at once and one new site went unregistered: six
violations, all from the same refactor. The registry now names the shared reader — the walk loop
leaves by stream end or the abandon break, and one pclose follows it on the only exit past the
failed open. The gitCommandLines, popenTrimmed and os_win32 rows are untouched.
Verified: crashsweepcheck ALL PASS, including all four S2 probes (the short-circuited fclose
fires, an unregistered raw fopen fires, an owned-fd hand-off is not counted, an os::-spelled
unregistered site still fires).
deckcheck requires every --token in the shipped prose to exist in --help or carry an allowlist
row with a reason. The CHANGELOG's framing entry enumerates the hostile fixture's file names,
one of which is `--dashdash.cpp` — a real filename in test/gitframingcheck.sh's fixture, quoted
accurately, and not a ripwire flag. Rewording the prose to dodge the scanner would make the
docs vaguer to satisfy a regex; the allowlist row is the honest fix, and it says what the token
is. Unused allowlist rows fail this gate as rot, so the row carries the fixture reference that
keeps it auditable.
…r next unit again
The framing entry gains the follow-up its first cut earned: the NUL reader polls the walkers'
abandon flag per byte, where the line readers it replaced polled per line, so a stream whose
fields never arrive no longer parks the read inside one unterminated field until end-of-stream.
…iscarding empty-email authors
PR #433 review (Major), executed by the PM seat under the operator's 2026-10-24 sanction
(producer in rate-limit cooldown; disclosed in the validation record). The boundary rule
ate a legitimately empty %ae (git accepts --author="No Email <>") as a merge prefix,
shifting the whole record — email<-the %at digits, epochs off by one, the first path's
'\n' unstripped — into a pathless phantom; gitFileAuthors' carried-over line-frame guard
then skipped any record with an empty email at all, so the file lost its ownership
entirely (measured: "git unavailable / no history" on a healthy one-commit repo).
The lookahead now decides what an empty is: followed by the MARKER (or end of stream) it
is a record boundary whatever is pending — which is also what closes the collision
phantom without swallowing the record after it (CodeRabbit's literal guard broke exactly
there; the cascade was caught by arm (a) before it shipped). Followed by anything else
while the marker or metadata is still owed, the empty is delivered to the state machine
as the field it is; only a record owing no metadata reads a non-boundary empty as a
merge prefix. The ownership guard keeps its epoch half alone (git never stamps a real
commit at or before epoch 0) — the email half discarded real history. parseEpochField
reports a degraded read (empty, non-digits, or leftover bytes) as nullopt and the walk
counts it in GitLogWalk::epochUnparsed — the sink a consumer reads; a window that cut on
a degraded epoch counted a floor, and saying so is the consumer's next step.
Gate arm (f): a one-commit empty-email fixture, proven RED on the pre-fix binary
alongside the full 40-arm battery, golden and digest unchanged.
…etic domain
ripwirepubliccheck 5b red on CI (all five first shards): cm@x.invalid is email-shaped outside
the synthetic allowlist (x.com/example.com/example.invalid/t.com/test.com). The fixture committer
is now cm@x.com, matching every other synthetic address in this gate. Gate-only — the binary and
every pinned digest/golden are untouched; gitframingcheck 40/0 and ripwirepubliccheck exit 0
re-verified locally on the fix.
The lane's base (9b73bcc) had drifted 940 commits behind: upstream's trains 28-37b
kept advancing the gate-registration sites our 4c0aa67 generator commit rewrote, so
the PR no longer merged cleanly. This is the project's own base-drift recipe — the
maintainer merged main into PR #397's branch the same way rather than asking for a
rebase over reviewed history.
The five conflicts, resolved per each site's own convention:
- test/regression.sh: the absorb-loop gate list unioned (the generator's documented
merge recipe) — upstream's 716 gates plus gitframingcheck between gitenvhermeticcheck
and githardencheck = 717.
- README.md, docs/EVALS.md, present/deck5_ripwire_build.js: upstream's side taken for
the count sites, then docs/gatecount_build.py rewrote all 8 marked sites to 717.
- CHANGELOG.md: upstream restructured [Unreleased] into changelog.d/ fragments (the
changelogfragcheck convention); the lane's entry moved to
changelog.d/433-git-log-framing.md, its kQChurnCacheScheme 3->4 move joined the
shared changelog.d/versions.md paragraph, and the stale intermediate versions
paragraph (kParserVer 206->220, superseded by upstream's 206->233) was dropped —
upstream's own fragments already carry every other entry that shared our old
[Unreleased] section.
src/ needed no resolution: upstream never touched gitmine.h or infra/stdinline.h
after 9b73bcc, so the lane's framing work merges trivially; crashsweepcheck's
registry row and the auto-merged sites (quality.h, crashsweepcheck.sh) verified by
inspection. changelog_assemble check: 35 fragments well formed.
Train 38 landed while the previous merge's CI was running (42 commits), re-conflicting the
PR on the same five mechanical files. Resolved the same way:
- test/regression.sh: upstream's 719-gate loop with gitframingcheck inserted between
gitenvhermeticcheck and githardencheck -> 720. Regenerated, not hand-edited.
- README.md, docs/EVALS.md, present/deck5_ripwire_build.js: upstream's text, then
docs/gatecount_build.py rewrote 720 to all 8 marked sites across the 3 files.
- changelog.d/versions.md: upstream's dictv=0ecfc7f421ee85e3 entries=943 supersedes the
older line; our kQChurnCacheScheme 3 -> 4 paragraph kept after it.
- src/quality.h and .github/pargates-shard-weights.json auto-merged.
changelog_assemble check: 39 fragments well formed. gatecount_build --check: all 8 sites
state 720.
Upstream moved through trains 39 and 40 (134 commits) while the previous tip's CI ran,
re-conflicting the PR on the same five mechanical files. Resolved by convention:
- test/regression.sh: upstream's 726-gate loop with gitframingcheck inserted between
gitenvhermeticcheck and githardencheck -> 727. Regenerated, not hand-edited.
- README.md, docs/EVALS.md, present/deck5_ripwire_build.js: upstream's text, then
docs/gatecount_build.py rewrote 727 to all 8 marked sites across the 3 files.
- changelog.d/versions.md: upstream's dictv=a3aaaa12b102080c entries=958 supersedes the
older line; our kQChurnCacheScheme 3 -> 4 paragraph kept after it.
- src/quality.h auto-merged.
changelog_assemble check: 64 fragments well formed. gatecount_build --check: all 8 sites
state 727.
…ment, correct the collision disclosure
N2: the changelog fragment credits #433 and @pt-act in its heading.
N4: the disclosed __C__ collision no longer says the phantom record is pathless and ignored; it states that the
merge's next three paths become the phantom's email and epochs and a fifth and later path rides it at epoch 0.
Comment and fragment text only.
Co-authored-by: RA <211776491+pt-act@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
…-prefix mutant
The review's mutant (a) (marker compared as a prefix at both sites) survived gitframingcheck. Arm (g) builds a
merge whose first combined path is __C__.cpp and wants the merge attached (4 authors); it is red on the prefix
compare (3 authors).
Co-authored-by: RA <211776491+pt-act@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Walkthrough
Git history mining now uses shared NUL-delimited parsing across five consumers. Regression coverage checks unusual filenames, ownership attribution, churn, and Git failure behavior. The history cache scheme changes from 3 to 4, and references to the gate-script count change from 729 to 730.
Changes: Git history framing
Layer / File(s)
Summary
Shared NUL-framed record reader src/infra/stdinline.h, src/gitmine.h, changelog.d/433-git-log-framing.md
A byte-safe field reader and shared parser read Git metadata and paths as NUL-delimited fields. The reader polls the abandon flag while reading.
History consumers and cache scheme src/gitmine.h, src/quality.h, changelog.d/versions.md, changelog.d/433-git-log-framing.md, test/churnjoincheck.sh, test/crashsweepcheck.sh
Five history-mining consumers use shared parsed records. The cache scheme changes from 3 to 4, and source checks and the raw-stream registry are updated.
The new regression gate checks hostile and ordinary histories, output, attribution, churn, determinism, and Git failure handling. The golden output and gate count references are updated. The changelog documents a remaining merge-path collision for a path named __C__.
These are bounded gaps in handling unusual Git output and in the failure test. Address them before relying on the new framing checks, or accept them as follow-up work.
Pre-merge checks: 4
Check name
Status
Explanation
Description Check
Check skipped - CodeRabbit’s high-level summary is enabled.
Title check
The title clearly describes the main fix: preventing committed filenames from being misread as Git commit metadata. The issue and author suffix add noise but do not make the title misleading.
Linked Issues check
Issue #433 is satisfied. src/gitmine.h provides one forEachGitLogRecord reader for the five history consumers. The reader uses NUL fields, raw paths, whole-field framing, lookahead for merge paths…
Out of Scope Changes check
The changes remain within Issue #433. The new framing gate, fixture, golden output, source-completeness updates, crash-sweep registry updates, and cache documentation support the parser migration. REA…
Full details: Linked Issues check
Explanation
Issue #433 is satisfied. src/gitmine.h provides one forEachGitLogRecord reader for the five history consumers. The reader uses NUL fields, raw paths, whole-field framing, lookahead for merge paths, empty-email handling, Git exit tracking, and centralized -z --no-ext-diff --no-textconv options. The cache scheme changes from 3 to 4. test/gitframingcheck.sh covers hostile names, newline and non-ASCII bytes, empty emails, attribution, merges, determinism, and Git rejection of -z. The test and changelog keep the documented __C__ first-path merge collision explicit.
Full details: Out of Scope Changes check
Explanation
The changes remain within Issue #433. The new framing gate, fixture, golden output, source-completeness updates, crash-sweep registry updates, and cache documentation support the parser migration. README, docs/EVALS.md, and the deck update the gate count after adding the related gate. No unrelated functional change is established.
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Inline comments:
Review comments at @src/gitmine.h:
- Line 791: Propagate GitLogWalk.epochUnparsed from forEachGitLogRecord through
its direct consumers and gitLogNameOnlyRaw instead of discarding it. Ensure
outputs affected by failed epoch parsing are disclosed as degraded or explicitly
marked as floors, including timestamp-based filtering, ownership, and decayed
mining.
- Around line 990-995: Update the `forEachGitLogRecord` framing logic so
non-empty streams without a `__C__` field mark `GitLogWalk::unread`, even when
`gitCmd` exits successfully. Propagate or disclose that unread status in each of
the four consumers that currently discard the returned `GitLogWalk`, rather than
treating malformed input as a successful empty history.
Review comments at @test/gitframingcheck.sh:
- Line 98: Export REAL_GIT after assigning it with command -v git so child shim
processes can invoke the real Git for calls without -z and verify the -z
rejection assertions accurately.
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Reviewing files that changed from the base of the PR and between 61ab7aa and fafb3f2.
Files selected for processing: 14
README.md
changelog.d/433-git-log-framing.md
changelog.d/versions.md
docs/EVALS.md
present/deck5_ripwire_build.js
src/gitmine.h
src/infra/stdinline.h
src/quality.h
test/churnjoincheck.sh
test/crashsweepcheck.sh
test/deckcheck_allowlist.txt
test/gitframingcheck.sh
test/gitframingcheck_golden.txt
test/regression.sh
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…z-rejecting shim and prove the rejection ran
The shim in gitframingcheck's git-floor arm is a child process, and REAL_GIT was assigned without export, so
the shim exec'd an empty command on every call without -z (repository discovery included). The arm passed
because git was unavailable, not because git rejected -z. REAL_GIT is now exported; a premise arm requires
the shim to delegate a plain call, and a second arm requires the shim to have seen and rejected a -z call.
Test only.
Co-authored-by: RA <211776491+pt-act@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
…no record marker is an unread walk
forEachGitLogRecord returned unread=false for a git that exited 0 and printed bytes that never carried a
__C__ field (a git answering in a format other than the one asked for, a PATH shim): no record was visited
and the walk read as a clean empty history. The walk now sets unread when data arrived, no marker opened a
record, the walk was not abandoned and git exited 0. gitLogNameOnlyRaw already carries unread, so --for's
churn= and amp= say history_unread="1" and the failed walk is not cached. gitframingcheck arm 9 pins it
(control, shim premise, disclosure, no churn= value); red on the previous binary. The four visitor
consumers still discard the walk: that is the documented K51 deferral (historyread.h NOT COVERED).
Co-authored-by: RA <211776491+pt-act@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
…ut no consumer reads it yet
The GitLogWalk::epochUnparsed comment called the field the sink a consumer reads to disclose a degraded
epoch, but no consumer reads it: the four visitor consumers and gitLogNameOnlyRaw discard the walk. The
comment now says so and historyread.h NOT COVERED names the carried deferral. Disclosing the floor on the
answer needs the K51 attribute extended to --cochange, --rank-by=churn and --owners, which is a separate
answer-changing lane. Comments only.
Co-authored-by: RA <211776491+pt-act@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Thanks to CodeRabbit for the review of fafb3f2. This PR lands @pt-act's NUL-framed git-log reader from #433; the feature and its 19 commits are theirs and are kept as they were.
All three threads were checked against the code. Follow-up commits after fafb3f2, newest last:
b66e26e: test/gitframingcheck.sh exports REAL_GIT to the -z-rejecting shim and adds two arms (the shim delegates a plain call; the shim saw and rejected a -z call). Fixes 4419234625.
90acd0f: a git that exits 0 with a non-empty stream that never carries a __C__ field is now an unread walk, so --for says history_unread="1" and does not cache it. gitframingcheck arm 9 pins it (red on the previous binary). Fixes the walker half of 4419234614.
0666a5e: comment-only. epochUnparsed is counted but no consumer reads it yet; the field comment and historyread.h now say so. Answers 4419234609.
Carried, not fixed here: telling a failed or unframed walk from an empty one in the four visitor consumers (--cochange, --rank-by=churn and --rank-by=churn-decay, --owners), and disclosing unparsable commit epochs on those answers. That needs the history_unread attribute extended to those verbs, which changes their output, so it is a separate follow-up (the K51 deferral already named in historyread.h).
Checks at 0666a5e: gitframingcheck, gitchildoptscheck, qchurncheck, churnjoincheck, mergechurncheck, ownerscheck, qschemetripcheck pass; 32 of 32 argv byte-identical against fafb3f2 on four repositories; quality-delta gating 0.
CI: the lane run on 0666a5e had 34 of 34 completed jobs green; only the advisory clang-tidy step was still running.
Merged main (train 42a) into this branch: 850cafa. The conflicts were generated docs and counts (README.md, docs/EVALS.md, the deck script; taken from main and regenerated to the new gate count) and test/regression.sh (both sides kept). No src/ changes beyond this PR's own.
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Lands #433 by @pt-act: every
git log --name-onlyconsumer in the history miners now reads one NUL-framed stream (forEachGitLogRecord), so a committed filename can no longer be read as commit metadata.Before this, five consumers framed the stream line by line and treated a
__C__prefix as the record marker. A file whose name begins with those bytes, or contains a newline, could be read as an author or a date. On @pt-act's hostile fixture,--ownersanalysed 8 of 11 files and credited files to an email that appears in no commit. The fix is one reader with whole-field sentinels and raw paths (core.quotepath=false), plus the--no-ext-diff --no-textconvhardening in one place.This branch carries @pt-act's 19 commits unchanged (through b8d4a73), then:
main(the branch predated 0.6.9).changelog.d/versions.mdkeeps main's paragraph and adds gitmine: a committed filename can no longer be read as commit metadata (git logframing) #433'skQChurnCacheScheme3 → 4 note.The two fix commits are co-authored with @pt-act.
Review: on hostile repos (CR/LF, non-UTF-8, marker-prefixed names, odd emails, renames, deletes, merges) the answers match
git log. On 6 in-sample repositories, 48 of 48 outputs are byte-identical to main. The one-time cold walk for the scheme bump costs about 0.3 s.Closes #433.
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