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#!/bin/bash
# Copyright 2015 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -eu
# This is a script which is installed instead of the real Bazel binary.
# It looks for a tools/bazel executable next to the containing WORKSPACE
# file and runs that. If that's not found, it runs the real Bazel binary which
# is installed next to this script as bazel-real.
# `readlink -f` that works on OSX too.
function get_realpath() {
if [ "$(uname -s)" == "Darwin" ]; then
local queue="$1"
if [[ "${queue}" != /* ]] ; then
# Make sure we start with an absolute path.
queue="${PWD}/${queue}"
fi
local current=""
while [ -n "${queue}" ]; do
# Removing a trailing /.
queue="${queue#/}"
# Pull the first path segment off of queue.
local segment="${queue%%/*}"
# If this is the last segment.
if [[ "${queue}" != */* ]] ; then
segment="${queue}"
queue=""
else
# Remove that first segment.
queue="${queue#*/}"
fi
local link="${current}/${segment}"
if [ -h "${link}" ] ; then
link="$(readlink "${link}")"
queue="${link}/${queue}"
if [[ "${link}" == /* ]] ; then
current=""
fi
else
current="${link}"
fi
done
echo "${current}"
else
readlink -f "$1"
fi
}
export BAZEL_REAL="$(dirname "$(get_realpath "${BASH_SOURCE[0]}")")/bazel-real"
WORKSPACE_DIR="${PWD}"
while [[ "${WORKSPACE_DIR}" != / ]]; do
if [[ -e "${WORKSPACE_DIR}/WORKSPACE" ]]; then
break;
fi
WORKSPACE_DIR="$(dirname "${WORKSPACE_DIR}")"
done
readonly WORKSPACE_DIR
if [[ -e "${WORKSPACE_DIR}/WORKSPACE" ]]; then
readonly WRAPPER="${WORKSPACE_DIR}/tools/bazel"
if [[ -x "${WRAPPER}" ]]; then
exec -a "$0" "${WRAPPER}" "$@"
fi
fi
if [[ ! -x "${BAZEL_REAL}" ]]; then
echo "Failed to find underlying Bazel executable at ${BAZEL_REAL}" >&2
exit 1
fi
exec -a "$0" "${BAZEL_REAL}" "$@"
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