#!/bin/sh
# script/fmt-check: check formatting (read-only). Same tools and scope
# as script/fmt, but fails instead of writing and names what it would
# change: the Go on the host, the markdown with prettier in the
# Dockerfile's fmt-check stage.
#
# --no-cache because a cached check layer is a check that did not run.
# The tag makes each build replace the previous image instead of leaving
# a dangling one behind.
set -eu

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

# goimports v0.42.0, 2026-08-07. Must match script/fmt.
GOIMPORTS_REF="golang.org/x/tools/cmd/goimports@009367f5c17a8d4c45a961a3a509277190a9a6f0"

main() {
    cd "$ROOT"
    files="$(gofmt -s -l .)"
    if [ -n "$files" ]; then
        echo "gofmt: files not formatted:" >&2
        echo "$files" >&2
        exit 1
    fi
    files="$(go run "$GOIMPORTS_REF" -l .)"
    if [ -n "$files" ]; then
        echo "goimports: files not formatted:" >&2
        echo "$files" >&2
        exit 1
    fi
    docker build --no-cache \
        --target fmt-check \
        -t "$("$SCRIPT_DIR/projectname")-fmt-check" .
}

main "$@"