shell_utils.sh

# Copyright (C) 2022 The Android Open Source Project
#
# 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.

function gettop
{
    local TOPFILE=build/make/core/envsetup.mk
    # The ${TOP-} expansion allows this to work even with set -u
    if [ -n "${TOP:-}" -a -f "${TOP:-}/$TOPFILE" ] ; then
        # The following circumlocution ensures we remove symlinks from TOP.
        (cd "$TOP"; PWD= /bin/pwd)
    else
        if [ -f $TOPFILE ] ; then
            # The following circumlocution (repeated below as well) ensures
            # that we record the true directory name and not one that is
            # faked up with symlink names.
            PWD= /bin/pwd
        else
            local HERE=$PWD
            local T=
            while [ \( ! \( -f $TOPFILE \) \) -a \( "$PWD" != "/" \) ]; do
                \cd ..
                T=`PWD= /bin/pwd -P`
            done
            \cd "$HERE"
            if [ -f "$T/$TOPFILE" ]; then
                echo "$T"
            fi
        fi
    fi
}

# Sets TOP, or if the root of the tree can't be found, prints a message and
# exits.  Since this function exits, it should not be called from functions
# defined in envsetup.sh.
if [ -z "${IMPORTING_ENVSETUP:-}" ] ; then
function require_top
{
    TOP=$(gettop)
    if [[ ! $TOP ]] ; then
        echo "Can not locate root of source tree. $(basename $0) must be run from within the Android source tree." >&2
        exit 1
    fi
}
fi

function getoutdir
{
    local top=$(gettop)
    local out_dir="${OUT_DIR:-}"
    if [[ -z "${out_dir}" ]]; then
        if [[ -n "${OUT_DIR_COMMON_BASE:-}" && -n "${top}" ]]; then
            out_dir="${OUT_DIR_COMMON_BASE}/$(basename ${top})"
        else
            out_dir="out"
        fi
    fi
    if [[ "${out_dir}" != /* ]]; then
        out_dir="${top}/${out_dir}"
    fi
    echo "${out_dir}"
}