CodeAF (Agent-Field/CodeAF) is a Go coding harness that ships one binary.
Pinned to v0.7.1; the flake's nixpkgs already carries go 1.26.7 and go.mod
asks for 1.26.5, so no extra nixpkgs input is needed.
Two things about this build are not obvious from the derivation:
- `make build` runs two host-side steps before compiling: `go generate
./internal/manual` packs the built-in manual into the pages.pack.gz and
chat.pack.gz that the codeaf_packed_manual tag embeds, and
internal/furrowbin/cmd/fetch stages the pinned Agent-Field/furrow release
into internal/furrowbin/cache for go:embed. Both are run in preBuild with
GOOS/GOARCH unset, the way the Makefile does it, so a cross build does not
try to run a target binary on the build machine. buildGoModule runs preBuild
in the vendoring derivation as well, before vendor/ exists and before the
dependencies are in reach, so the two steps are gated on vendor/.
- The furrow step gets its bytes from fetchurl and `-from`, the offline road
upstream documents. The fetcher still checks the sha256 in
internal/furrowbin/pin.json, so the hashes here duplicate a pin that is
already in the source; drop the furrow entirely and codeaf still builds and
falls back to looking for the binary on PATH.
Tests are off: the upstream suite is a make/CI matrix with network and timing
assumptions, not a `go test ./...` that fits buildGoModule.
Verified with nix build .#codeaf, `codeaf --version` reporting 0.7.1 and
`codeaf manual` listing the packed manual pages.
Refs nix-overlay-m5y
