path_lib.sh

#   (C) 2017 by Argonne National Laboratory.
#       See COPYRIGHT in top-level directory.

readonly BASE_PATH=${LR:-$HOME/.local}
export BASE_PATH

readonly ENV_BACKUP_FILE="$HOME/.path_lib.env.bak"

# Utilities

function init() {
    :
}

function backup_env() {
    if [ -f $ENV_BACKUP_FILE ]; then
        rm $ENV_BACKUP_FILE
    fi
    touch $ENV_BACKUP_FILE
    echo "export PATH=$PATH" >> $ENV_BACKUP_FILE
    echo "export CPATH=$CPATH" >> $ENV_BACKUP_FILE
    echo "export INCLUDE=$INCLUDE" >> $ENV_BACKUP_FILE
    echo "export C_INCLUDE_PATH=$C_INCLUDE_PATH" >> $ENV_BACKUP_FILE
    echo "export CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH" >> $ENV_BACKUP_FILE
    echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >> $ENV_BACKUP_FILE
    echo "export LIBRARY_PATH=$LIBRARY_PATH" >> $ENV_BACKUP_FILE
    echo "export LBAK_PKG_CONFIG_PATH=$PKG_CONFIG_PATH" >> $ENV_BACKUP_FILE
}

function restore_env() {
    source $ENV_BACKUP_FILE
}

function path_exists() {
    if [ -d "$1" ] || [ -h "$1" ]; then
        return 0
    else
        return 1
    fi
}

function clean_path() {
    local _tmp_p=${(P)1}
    export $1="${_tmp_p%:}"
}

function check_export_path() {
    local _tmp_p=${(P)1}
    if path_exists "$2"; then
        if [[ ! ":$_tmp_p:" = *":$2:"* ]]; then
            export $1="$2:$_tmp_p"
            clean_path $1
        fi
    else
        return 0
    fi
}

function abs_or_local_path() {
    if path_exists "$1" ; then
        NEW_PATH="$1"
        return 0
    fi
    if path_exists "$BASE_PATH/$1" ; then
        NEW_PATH="$BASE_PATH/$1"
        return 0
    fi
    echo "path_lib: $1 does not exist"
    return 1
}

# Basic path functions

function lib_path() {
    abs_or_local_path "$1"

    check_export_path CPATH "$NEW_PATH/include"
    export INCLUDE=$CPATH
    export C_INCLUDE_PATH=$CPATH
    export CPLUS_INCLUDE_PATH=$CPATH

    check_export_path LIBRARY_PATH "$NEW_PATH/lib"
    check_export_path LIBRARY_PATH "$NEW_PATH/lib64"
    export LD_LIBRARY_PATH=$LIBRARY_PATH

    check_export_path PKG_CONFIG_PATH "$NEW_PATH/lib/pkgconfig"
    check_export_path PKG_CONFIG_PATH "$NEW_PATH/lib64/pkgconfig"
}

function bin_path() {
    abs_or_local_path "$1"

    check_export_path PATH    "$NEW_PATH/bin"
}

# Convenient functions

function get_prefix() {
    echo "$BASE_PATH/$1"
}

function application_path() {
    bin_path "$1"
}

function library_path() {
    lib_path "library/$1"
}

function compiler_path() {
    bin_path "$1"
    lib_path "$1"
}

function default() {
    if [ -n "$LOCAL_DEF_PATH" ]; then return; fi

    check_export_path PATH    "$LR/usr/bin"
    check_export_path PATH    "$LR/bin"
    bin_path "bin"
    bin_path "usr/bin"

    lib_path "usr"
    lib_path "$BASE_PATH"
    export LOCAL_DEF_PATH=1
}

# vim: syn=zsh