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check / check (pull_request) Successful in 3m54s
A plain `docker build .` stamped `dev`: `.dockerignore` left out `.git` and the Dockerfile defaulted VERSION to `dev`. `.dockerignore` is now the canonical one plus this repo's entries, sending `.git` without `.git/config`. Given no build arguments, the builder stamps `git describe --tags --always` and the commit and date from git, and fails if `.git` is present but yields no version. The empty CHECK_EPOCH refusal is gone so the plain build succeeds; the scripts still pass an epoch. `script/version` now prints `git describe --tags --always --dirty`, so make, the scripts and a plain build agree. Model: opus-5-5
79 lines
3.5 KiB
Bash
Executable File
79 lines
3.5 KiB
Bash
Executable File
#!/bin/sh
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# script/cibuild: run the CI build. This is the full gate, and it is two
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# builds, in this order:
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#
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# Dockerfile.lint the linter, as a build step (a clean build IS a
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# clean lint)
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# Dockerfile `make fmt-check` and `make test` in the builder
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# stage, then the product image
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#
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# Either one failing fails this script. Note what follows from the
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# split: script/docker builds only the product image and so no longer
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# lints -- this script and script/check (which runs script/lint) are the
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# things that decide whether the tree is clean.
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#
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# Generic apart from the two Dockerfiles: the Gitea workflow runs this
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# on push.
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set -eu
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ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
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main() {
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cd "$ROOT"
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# Both Dockerfiles key their check layers on CHECK_EPOCH, so a fresh
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# value is what forces those layers to re-run: without it an
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# unchanged tree replays them from cache, the checks never execute,
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# and the build still exits 0. Each ARG sits immediately above the
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# check RUNs, so dependency and module layers still cache.
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# Dockerfile.lint also refuses to build at all when CHECK_EPOCH is
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# empty, so a missing value fails its build loudly rather than passing
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# quietly; the product Dockerfile does not, because a plain `docker
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# build .` must succeed.
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#
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# The value must be unique per invocation, not per second. `date +%s`
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# is second-granular, so two concurrent invocations in the same
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# second get identical epochs and the later one can be served from
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# cache -- the original defect in miniature. `%N` alone does not fix
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# it: busybox silently drops %N, exits 0, and hands back second
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# granularity with no warning. `$$` is what makes this correct
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# regardless, since concurrent invocations have different pids.
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#
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# Assign the epoch on its own line rather than inline in the
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# argument. Under `set -eu` a command substitution that fails
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# inside an argument does NOT abort the script: CHECK_EPOCH would
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# become an empty string, an empty string is a constant, and a
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# constant CHECK_EPOCH is exactly the cached-check false green this
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# script exists to prevent -- so the guard would disarm itself and
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# still exit 0. As a bare assignment, `set -e` catches a failing
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# `date` and no build starts.
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#
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# A separate value per build, because they are separate builds: one
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# `date` shared between them would still be fresh, but reusing it
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# invites the two to be collapsed into a single value that is
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# computed somewhere else and passed in.
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epoch="$(date +%s%N)$$"
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# cacheonly for the lint build: its verdict is the exit status and
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# the image is never run, so exporting it is pure cost. See
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# script/lint.
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docker build --output=type=cacheonly \
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--build-arg CHECK_EPOCH="$epoch" -f Dockerfile.lint .
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# Version, commit and build date are computed here on the host, the
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# same way script/docker does, and passed into the product build,
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# where they take precedence over what the build would derive from
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# the .git in its context. VERSION comes from script/version, as in
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# the Makefile.
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version="$("$ROOT/script/version")"
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commit="$(git rev-parse HEAD 2>/dev/null || echo unknown)"
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commit_date="$(git show -s --format=%cs HEAD 2>/dev/null || echo unknown)"
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epoch="$(date +%s%N)$$"
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docker build --build-arg CHECK_EPOCH="$epoch" \
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--build-arg VERSION="$version" \
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--build-arg COMMIT="$commit" \
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--build-arg COMMIT_DATE="$commit_date" \
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.
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}
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main "$@"
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