script/build stamps lightweight tags too (closes #156)

When VERSION is unset or empty, script/build now takes the version from
`git describe --tags --always --dirty`, the form script/docker and
script/cibuild use. Without --tags it ignored lightweight tags, so a
binary from `make build` could report a commit where the image built
from the same tree reported the tag. README.md Entrypoints names the
same form.

Model: opus-5-5

.gitea/workflows/check.yml

@@ -1,9 +1,20 @@
 name: check
 on: [push]
+# Free the shared runner: a new push cancels only the same branch's older run.
+concurrency:
+    group: ${{ github.workflow }}-${{ github.ref }}
+    cancel-in-progress: true
 jobs:
     check:
         runs-on: ubuntu-latest
+        # Free the shared runner from a hung build.
+        timeout-minutes: 20
         steps:
             # actions/checkout v4.2.2, 2026-02-22
             - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+              # script/cibuild needs no token, so none is left in .git/config.
+              with:
+                  persist-credentials: false
+                  # All history and tags, so git describe finds the version tag.
+                  fetch-depth: 0
             - run: script/cibuild

README.md

@@ -55,7 +55,8 @@ either one is broken. We provide:
 - `script/build` — build the frontend for production into `dist/`, then the
   static `netwatch-server` binary into the repo root with its version stamped
   in: `VERSION` from the environment, or when that is unset or empty,
-  `git describe` inside a git checkout, then `dev`
+  `git describe --tags --always --dirty` inside a git checkout, as
+  `script/docker` does, then `dev`
 - `script/run` — build with `script/build`, then run `netwatch-server` with its
   defaults (see [Settings](#settings))
 - `script/clean` — remove what `script/build` writes

TODO.md

@@ -12,7 +12,8 @@
 pre-1.0. No git tags. `main` is the stable branch and `next` the development
 branch, which every PR targets. The frontend and the Go backend ship as one
 Docker image, and the Gitea workflow `.gitea/workflows/check.yml` runs
-`script/cibuild` on every push. Working toward 1.0.0.
+`script/cibuild` on every push, and cancels the older run on the same branch.
+Working toward 1.0.0.
 
 # Next Step
 
@@ -21,6 +22,20 @@ Run `make frontend-viewport-test` in CI as its own step; it is not part of
 
 # Completed Steps
 
+- 2026-10-19: when `VERSION` is unset or empty, `script/build` stamps the
+  version from `git describe --tags --always --dirty`, as `script/docker` does
+  ([#156](https://git.eeqj.de/sneak/netwatch/issues/156)). Without `--tags` it
+  skipped lightweight tags, so `make run` could report a commit where the image
+  built from the same tree reported the tag. Checked once with a lightweight tag
+  on a scratch clone: `make build` stamped it
+- 2026-10-19: `.gitea/workflows/check.yml` is the sneak/prompts copy at
+  `0653579` ([#153](https://git.eeqj.de/sneak/netwatch/issues/153)). Its
+  checkout step sets `fetch-depth: 0`, so CI clones all history and tags, and
+  `git describe` in `script/cibuild` gives the image built from a tagged commit
+  the tag as its version; it gave the short commit. The checkout step also sets
+  `persist-credentials: false`, so the job's token is not left in `.git/config`.
+  A new push cancels the older run on the same branch, and a run stops after 20
+  minutes
 - 2026-10-19: `script/bootstrap` keeps the `yarn` on `PATH` only when
   `yarn --version` is exactly `YARN_VERSION`, and otherwise installs that
   version as it did when no yarn was installed

script/build

@@ -10,9 +10,10 @@ main() {
     cd "$ROOT"
     "$ROOT/script/yarn" build
 
-    # VERSION comes from the environment. Unset or empty, it is git
-    # describe, or "dev" where there is no git or no repository history.
-    version="${VERSION:-$(git describe --always --dirty 2>/dev/null || echo dev)}"
+    # VERSION comes from the environment. Unset or empty, it is
+    # `git describe --tags --always --dirty`, as in script/docker, or
+    # "dev" where there is no git or no repository history.
+    version="${VERSION:-$(git describe --tags --always --dirty 2>/dev/null || echo dev)}"
 
     CGO_ENABLED=0 go build -trimpath \
         -ldflags "-s -w -X main.Version=$version" \