#!/bin/sh
# script/lint: run the linter, in docker only. Builds Dockerfile.lint,
# where golangci-lint runs as a build step.
#
# A cached build lints nothing, so --no-cache-filter rebuilds the lint
# stage on every run, an unchanged tree included. It ignores a stage name
# that does not exist, so --target names the same stage: a rename then
# fails the build instead of serving the lint from cache. cacheonly keeps
# no image; only the build's success matters.
set -eu

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

main() {
    cd "$ROOT"
    docker build \
        --progress=plain \
        --target lint \
        --no-cache-filter=lint \
        --output=type=cacheonly \
        -f Dockerfile.lint .
}

main "$@"