#!/usr/bin/env bash

# Copyright © Tavian Barnes <tavianator@tavianator.com>
# SPDX-License-Identifier: 0BSD

# Convert compiler diagnostics to GitHub Actions messages
# https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-a-warning-message

set -eu

SEDFLAGS="-En"
if sed -u 's/s/s/' </dev/null &>/dev/null; then
    SEDFLAGS="${SEDFLAGS}u"
fi

filter() {
    sed $SEDFLAGS 'p; s/^([^:]*):([^:]*):([^:]*): (warning|error): (.*)$/::\4 file=\1,line=\2,col=\3,title=Compiler \4::\5/p'
}

exec "$@" > >(filter) 2> >(filter >&2)