Artifact [9723a6f672]

Artifact 9723a6f6729991e4c2989dc28c47ab9217d195d874dca587cac1d48b26b5fa4c:

• File internal/sync/transport.go — part of check-in [6273a0750d] at 2026-07-22 23:03:24 on branch trunk — fix: correct go.mod module path to go-libfossil (#76) (#117)

  * fix: correct go.mod module path to go-libfossil (#76)

  The module directive still declared github.com/danmestas/libfossil after the repository was renamed to go-libfossil. pkg.go.dev/godoc scraping matches the declared module path against its hosting path, so the stale path broke SDK doc generation.

  Rename the module path across all four in-repo modules (root, the two db/driver submodules, observer/otel, and docs/site) and every internal import, plus the release workflow, the doc-generation script, and the docs.

  No tag has been published under the go-libfossil path yet, so the cross-module requires cannot resolve from the proxy. Add replace directives pointing the in-repo requires at their local directories so GOWORK=off builds and the CI matrix resolve without a published version. These replaces are ignored by downstream consumers and can be dropped once new-path tags are cut.

  * Guard releases against replace directives; regenerate SDK docs

  The go-libfossil rename bridges the in-repo modules with `replace` directives. Go refuses a main module that carries them, so a tag cut while they are present breaks `go install .../cmd/libfossil@<tag>` and every `@version` fetch of the driver submodules. Add a Release workflow step that fails the job before anything is published if any tracked go.mod still contains a replace directive, so the bridge is a CI-enforced TODO rather than a silent landmine. The step comment records what unblocks a release: re-tag the submodules with the corrected module paths, bump the root requires, then drop the replace blocks.

  Regenerate the SDK reference docs. The previous pass only substituted URLs over the pre-existing generated files, leaving stale signatures (Repo.Timeline was still documented as taking LogOpts rather than TimelineOpts). Note that gomarkdoc must be run outside a git worktree — inside one it silently strips every source link.

  Also reword the README rename note, which read as though the import path had not changed, and re-sort the ncruces require block. (user: [email protected], size: 2235) [annotate] [blame] [check-ins using]

package sync

import (
	"bytes"
	"context"
	"fmt"
	"io"
	"net/http"

	"github.com/danmestas/go-libfossil/internal/xfer"
)

// Transport sends an xfer request and returns the response.
// Implementations handle encoding (the request Message is already decoded),
// network I/O, and decoding. The xfer.Message uses zlib-compressed payloads
// internally — see [xfer.Encode] and [xfer.Decode] for wire format details.
//
// Built-in implementations: [HTTPTransport] (Fossil HTTP /xfer protocol),
// [MockTransport] (canned responses for testing). The leaf agent adds
// NATSTransport for NATS-based peer-to-peer sync.
type Transport interface {
	Exchange(ctx context.Context, request *xfer.Message) (*xfer.Message, error)
}

// MockTransport replays canned responses for testing.
type MockTransport struct {
	Handler func(req *xfer.Message) *xfer.Message
}

func (t *MockTransport) Exchange(ctx context.Context, req *xfer.Message) (*xfer.Message, error) {
	if req == nil {
		panic("sync.MockTransport.Exchange: req must not be nil")
	}
	if t.Handler == nil {
		return &xfer.Message{}, nil
	}
	return t.Handler(req), nil
}

// HTTPTransport speaks Fossil's HTTP /xfer protocol.
// Fossil routes to /xfer based on Content-Type: application/x-fossil,
// NOT the URL path. URL should be the repo root (e.g. "http://localhost:8080").
type HTTPTransport struct {
	URL string // repo root, e.g. "http://localhost:8080"
}

func (t *HTTPTransport) Exchange(ctx context.Context, req *xfer.Message) (*xfer.Message, error) {
	if req == nil {
		panic("sync.HTTPTransport.Exchange: req must not be nil")
	}
	body, err := req.Encode()
	if err != nil {
		return nil, fmt.Errorf("sync.HTTPTransport encode: %w", err)
	}
	httpReq, err := http.NewRequestWithContext(ctx, "POST", t.URL, bytes.NewReader(body))
	if err != nil {
		return nil, fmt.Errorf("sync.HTTPTransport request: %w", err)
	}
	httpReq.Header.Set("Content-Type", "application/x-fossil")
	resp, err := http.DefaultClient.Do(httpReq)
	if err != nil {
		return nil, fmt.Errorf("sync.HTTPTransport do: %w", err)
	}
	defer resp.Body.Close()
	respBody, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("sync.HTTPTransport read: %w", err)
	}
	return xfer.Decode(respBody)
}