#!/bin/sh
# script/cibuild: run the CI build. It bootstraps first: a CI runner
# checks out and runs this and nothing else, and script/fmt-check runs
# the formatter on the host, which a pristine checkout cannot do.
# A new CACHEBUST value reruns every RUN step, since a cached gate phase
# is a check that did not run; unlike --no-cache, it keeps Go's build cache.
# This relies on every stage of the Dockerfile declaring ARG CACHEBUST
# first; a stage without that line is served from cache on an unchanged
# tree, with no warning.
set -eu

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"

main() {
    cd "$ROOT"
    "$SCRIPT_DIR/bootstrap"
    "$SCRIPT_DIR/check"
    # The version and the tag each get their own line: a failing
    # command substitution inside an argument does not trip `set -e`,
    # so the inline form degrades silently to an empty constant. The
    # VERSION build argument takes precedence over the version a build
    # stage derives from the .git in the context.
    version="$(git describe --tags --always --dirty 2>/dev/null || true)"
    [ -n "$version" ] || version="unknown"
    tag="$("$SCRIPT_DIR/projectname")"
    docker build --build-arg CACHEBUST="$(date +%s)-$$" \
        --build-arg VERSION="$version" \
        -t "$tag" .
}

main "$@"