#!/bin/sh
# script/lint: run the linter. Linting is a phase of the Dockerfile and
# this builds that phase alone; the linter is never installed or run on
# a developer host, where a shared result cache and a host-global lock
# make its answer untrustworthy.
#
# The phase is not the last stage in the file, so it is built only when
# --target names it. --no-cache because a cached lint layer is a lint
# 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)"

main() {
    cd "$ROOT"
    # The tag gets its own line: a failing command substitution inside
    # an argument does not trip `set -e`, so the inline form degrades
    # silently to an empty constant.
    tag="$("$SCRIPT_DIR/projectname")"
    docker build --no-cache \
        --target lint \
        -t "$tag-lint" .
}

main "$@"