How can I find out if this shell script has already been run in a bash window?

Question

The shell script is below. It starts something called Nios II command shell and is used with Intel Quartus tools and their FPGAs. This script would be run in a shell like bash in Cygwin. The problem is that I forget to run this script before some others are executed. As far as I am aware, this script should be run only once after the terminal is open and not another time.

#!/bin/bash
############################################################
#                                                          #
# Nios2 Software Build Tools (SBT) Command Shell           #
#                                                          #
# Execute this script to setup an environment for          #
# using the Nios2eds Software Build Tools (SBT)            #
#                                                          #
# This shell uses nios2-elf-gcc version 4.7.3              #
#                                                          #
#                                                          #
# Copyright (c) 2010,2012,2013 Altera Corporation          #
# All Rights Reserved.                                     #
#                                                          #
############################################################


############################################################
#
# Get the Root ACDS directory
#

# Don't delimit on whitespace so that dirname is happy with
# spaces in paths
IFS=

if [ -n "${COMSPEC}" ]; then
    _IS_WINDOWS=1
    PATH="/bin:/usr/bin:${PATH}"
fi

if [ "${_IS_WINDOWS}" = "1" ] && [ -n "$(which cygpath 2>/dev/null)" ]; then
    _IS_CYGWIN=1
fi

if [ "${_IS_CYGWIN}" = "1" ]; then
    printf "33]2;Altera Nios II EDS 18.1 [gcc4]a"
fi

_this_nios2_command_shell_script=$(cd ${0%[\/]*} && echo $(pwd 2>/dev/null)/${0##*/})
_ACDS_ROOT=$(dirname $(dirname ${_this_nios2_command_shell_script}))
unset _this_nios2_command_shell_script

if [ ! -d "${_ACDS_ROOT}/nios2eds" ]; then
    echo "${_ACDS_ROOT}/nios2eds not found. Invalid or corrupt ACDS Install" 1>&2
    exit 1
fi

if [ -z "${QUARTUS_ROOTDIR_OVERRIDE}" ]; then
    if [ ! -d "${_ACDS_ROOT}/quartus" ]; then
        echo "${_ACDS_ROOT}/quartus not found. Invalid or corrupt ACDS Install" 1>&2
        exit 1
    fi
fi

############################################################


############################################################
#
# Convenience bash functions for setting up the environment
#

env_var_delete () {
    local var=${2:-PATH}
    local value
    local IFS=':'
    for i in ${!var} ; do
        if [ "$i" != "$1" ] ; then
            value=${value:+$value:}$i
        fi
    done
    export $var="$value"
}

env_var_prepend () {
    env_var_delete $1 $2
    local var=${2:-PATH}
    export $var="$1${!var:+:${!var}}"
}

env_var_append () {
    env_var_delete $1 $2
    local var=${2:-PATH}
    export $var="${!var:+${!var}:}$1"
}
############################################################


############################################################
#
# Setup Quartus II
#

if [ -n "${QUARTUS_ROOTDIR_OVERRIDE}" ]; then
    QUARTUS_ROOTDIR=${QUARTUS_ROOTDIR_OVERRIDE}

    if [ "${_IS_CYGWIN}" = "1" ]; then
        QUARTUS_ROOTDIR="$(cygpath -u "${QUARTUS_ROOTDIR}" 2>/dev/null)"
    fi
else
    QUARTUS_ROOTDIR=${_ACDS_ROOT}/quartus
fi

env_var_prepend "${QUARTUS_ROOTDIR}/sopc_builder/bin"

if [ -d "${QUARTUS_ROOTDIR}/bin64" ]; then
    if [ -d "${QUARTUS_ROOTDIR}/bin32" ]; then
        env_var_prepend "${QUARTUS_ROOTDIR}/bin32"
    fi
    env_var_prepend "${QUARTUS_ROOTDIR}/bin64"
else
    env_var_prepend "${QUARTUS_ROOTDIR}/bin"
fi

if [ "${_IS_CYGWIN}" = "1" ]; then
    QUARTUS_ROOTDIR="$(cygpath -m "${QUARTUS_ROOTDIR}" 2>/dev/null)"
fi
export QUARTUS_ROOTDIR
############################################################


############################################################
#
# Setup Modelsim AE
#  (if modelsim_ae/modelsim_ase directory exists and vsim not in PATH)
#

if [ -z "$(which vsim 2>/dev/null)" ]; then

    if [ "${_IS_WINDOWS}" = "1" ]; then
        _VSIM_EXEC_DIR=win32aloem
    else
        _VSIM_EXEC_DIR=linuxaloem
    fi

    if [ -d "${_ACDS_ROOT}/modelsim_ae/${_VSIM_EXEC_DIR}" ]; then
        env_var_prepend "${_ACDS_ROOT}/modelsim_ae/${_VSIM_EXEC_DIR}"
    else
        if [ -d "${_ACDS_ROOT}/modelsim_ase/${_VSIM_EXEC_DIR}" ]; then
            env_var_prepend "${_ACDS_ROOT}/modelsim_ase/${_VSIM_EXEC_DIR}"
        fi
    fi
    unset _VSIM_EXEC_DIR
fi
############################################################


############################################################
#
# Setup Nios2eds (GCC 4)
#

SOPC_KIT_NIOS2=${_ACDS_ROOT}/nios2eds

env_var_prepend "${SOPC_KIT_NIOS2}/bin"
env_var_prepend "${SOPC_KIT_NIOS2}/sdk2/bin"

if [ "${_IS_WINDOWS}" = "1" ]; then
    if [ -d "${SOPC_KIT_NIOS2}/bin/gnu/H-x86_64-mingw32/bin" ]; then
    env_var_prepend ${SOPC_KIT_NIOS2}/bin/gnu/H-x86_64-mingw32/bin
    else
        env_var_prepend ${SOPC_KIT_NIOS2}/bin/gnu/H-i686-mingw32/bin
    fi
else
    if [ -d "${SOPC_KIT_NIOS2}/bin/gnu/H-x86_64-pc-linux-gnu/bin" ]; then
    env_var_prepend ${SOPC_KIT_NIOS2}/bin/gnu/H-x86_64-pc-linux-gnu/bin
    else
    env_var_prepend ${SOPC_KIT_NIOS2}/bin/gnu/H-i686-pc-linux-gnu/bin
    fi
fi

if [ "${_IS_CYGWIN}" = "1" ]; then
    SOPC_KIT_NIOS2="$(cygpath -m "${SOPC_KIT_NIOS2}" 2>/dev/null)"
fi
export SOPC_KIT_NIOS2
############################################################


unset _ACDS_ROOT
unset _IS_WINDOWS
unset _IS_CYGWIN
unset _NIOS2EDS_ROOT
unset _QUARTUS_ROOT
unset env_var_prepend
unset env_var_append
unset env_var_remove


if [ -n "$*" ]; then
    exec $@
else
    echo "------------------------------------------------"
    echo "Altera Nios2 Command Shell [GCC 4]"
    echo
    echo "Version 18.1, Build 625"
    echo "------------------------------------------------"

    # Use bash --norc to get a clean shell
    # Use bash --rcfile <bashrc> to for a user rcfile
    # Default to using ~/.bashrc
    bash
fi

My question is, can another script find out if this script has already been run? I cannot change this script.

question from:https://stackoverflow.com/questions/65904193/how-can-i-find-out-if-this-shell-script-has-already-been-run-in-a-bash-window

Answer 1

Waitting for answers