more idiomatic makefile

Reviewed-on: #6

Makefile

@@ -3,7 +3,7 @@
 
 # Target bodies live in script/ (Scripts to Rule Them All); the targets
 # below are thin shims that call them.
-.DEFAULT_GOAL := check
+.DEFAULT_GOAL := build
 
 VERSION ?= $(shell git describe --tags --always)
 
@@ -37,7 +37,9 @@ cibuild:
 hooks:
 	@script/install-precommit
 
-build:
+build: ./bin/rtnetmon
+
+./bin/rtnetmon: ./cmd ./internal go.sum go.mod
 	CGO_ENABLED=0 go build -trimpath -ldflags "-X main.Version=$(VERSION)" \
 		-o bin/rtnetmon ./cmd/rtnetmon
 

TODO.md

@@ -15,3 +15,27 @@ from `main` onto `prod`; `prod` never follows `main` automatically.
 
 Other issue branches do not touch this file; it changes only in its own PR to
 `next`, because every branch editing `TODO.md` conflicts with every other.
+
+# Status
+
+On `next`:
+
+- Repo standards (https://git.eeqj.de/sneak/rtnetmon/issues/1): the `script/`
+  entrypoints, the vendored `.golangci.yml`, and `REPO_POLICIES.md`.
+- Interface detection on Linux and macOS
+  (https://git.eeqj.de/sneak/rtnetmon/issues/2).
+- The fix for macOS VPN detection (https://git.eeqj.de/sneak/rtnetmon/issues/8).
+- Starlink status lines (https://git.eeqj.de/sneak/rtnetmon/issues/3).
+- A version stamp: built with `make build` or a plain `docker build .`, the
+  binary logs its git tag or short commit at startup
+  (https://git.eeqj.de/sneak/rtnetmon/issues/10).
+- CI that runs `script/cibuild` on every push to a branch
+  (https://git.eeqj.de/sneak/rtnetmon/issues/12).
+
+# Next Step
+
+- `sneak` merges the milestone PR, https://git.eeqj.de/sneak/rtnetmon/pulls/6,
+  carrying `next` into `main`.
+- A first run on a real Mac of what is on `next` now. The fix for
+  https://git.eeqj.de/sneak/rtnetmon/issues/8 has not run on a Mac yet;
+  `sneak`'s first run on his Mac is its test.