feat: shared pkg/recordfmt export library + xtcp2client -format output#40
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randomizedcoder merged 1 commit intoJun 20, 2026
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…output Extract the record formatting (json/jsonl/csv/tsv/humanize + protobufList/ text/msgpack) and humanizing (IPs, TCP state, congestion enum, timestamp) out of pkg/xtcp into a new pure library, pkg/recordfmt, used by both the daemon and the gRPC client so they format identically. pkg/recordfmt: - humanize.go, columns.go (reflection-derived columns + selection), marshal.go (per-record incl. MarshalHumanizedJSON), marshal_envelope.go (batch + pool-friendly AppendEnvelopeProtobufList). Pure: returns ([]byte, error), no prometheus/pool/logging — callers own those. Format-name constants are the single source of truth. pkg/xtcp: marshallers.go / marshallers_text.go become thin wrappers that keep the registries, destBytesPool reuse for protobufList, and prometheus error counting, delegating byte production to recordfmt. New `humanize` marshaller (humanized JSONL) for parity. humanize.go and flat_record_row.go removed (moved). Existing daemon tests unchanged and green. cmd/xtcp2client: now actually outputs records. New -format json|csv|tsv| humanize|null (+ -columns for csv/tsv); -json kept as a deprecated alias. A concurrency-safe recordPrinter writes via recordfmt, csv/tsv header once. Verified end-to-end against a live daemon: each client -format prints real humanized host sockets (172.16.50.219 / LISTEN / CUBIC); daemon -marshal humanize emits humanized JSONL. nix lint + unit + cmd tests pass. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Extracts the record export/humanize code into a shared library used by both the daemon and
xtcp2client, and gives the client real output.pkg/recordfmt(new, pure)humanize.go—IPString/TCPStateName/CongestionAlgorithmName/TimestampRFC3339.columns.go— reflection-derivedColumns,SelectColumns,Header,Row.marshal.go— per-recordMarshalJSON/MarshalText/MarshalMsgPack/MarshalHumanizedJSON+ format-name constants (single source of truth).marshal_envelope.go— batch marshallers + pool-friendlyAppendEnvelopeProtobufList.([]byte, error); no prometheus/pools/logging — callers own those.Daemon (
pkg/xtcp)marshallers.go/marshallers_text.gobecome thin wrappers that keep the registries,destBytesPoolreuse forprotobufList, and prometheus error counting, delegating torecordfmt. Adds ahumanizemarshaller (humanized JSONL) for parity.humanize.go+flat_record_row.goremoved (moved). Behavior-preserving — existing daemon tests unchanged and green.Client (
cmd/xtcp2client)Previously emitted nothing. Now:
-format json|csv|tsv|humanize|null(+-columnsfor csv/tsv);-jsonkept as a deprecated alias. A concurrency-saferecordPrinterformats each streamed record viarecordfmt(csv/tsv header once).Verification
nix build .#checks.x86_64-linux.golangci-lint .#test-go-unit .#test-pkg-xtcp .#test-cmd-xtcp2 .#test-cmd-xtcp2clientall pass.json(valid per line),csv(l,172.16.50.219,SYN_SENT),humanize(readable JSON),null(empty); daemon-marshal humanizeemits humanized JSONL.Pairs with the docs in #39 (protobuf-formats).
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