Tools/ccache/ccache-wrapper

#!/usr/bin/env bash

# Copyright (C) 2017 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.

try_one()
{
    [[ -x "$1" && ! -d "$1" ]] && { CCACHE="$1"; return 0; }
    return 1
}

try()
{
    [[ -n "${CCACHE}" ]] && return 0
    try_one "$1" || \
    try_one "$1/ccache" || \
    try_one "$1/bin/ccache"
}

try $(which ccache &> /dev/null)
try /usr/local
try /opt/brew
try /opt/homebrew
try "${HOMEBREW_TEMP}/../brew"
try "${HOMEBREW_TEMP}/../../brew"

if [[ -n "${CCACHE}" ]]; then
    CCACHE_SLOPPINESS="pch_defines,time_macros" "${CCACHE}" "$@"
else
    "$@"
fi