#!/bin/sh
# script/lint: run the linter. golangci-lint is never installed locally: it
# runs via docker only, one way, everywhere — script/lint builds
# Dockerfile.lint, which COPYs the repo into the pinned golangci-lint image
# and lints as a build step. This works even when the docker daemon is remote
# and bind mounts are impossible, and it removes the host linter's shared
# cache, which has attributed other checkouts' findings to this one.
#
# --no-cache-filter=lint forces the lint stage to re-execute on every run; a
# cached lint stage exits 0 in under a second having linted nothing. The deps
# stage keeps its cache, so module downloads are not repeated.
# --progress=plain keeps the linter's own output visible on success, so a
# passing run shows the issue count rather than nothing.
# --output=type=cacheonly leaves no image behind to clean up.
set -eu

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

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

main "$@"