bash debugger Code

# -*- shell-script -*-
# Set up to Debug into another script...
#
#   Copyright (C) 2002-2004, 2006, 2008-2011, 2019
#   Rocky Bernstein <rocky@gnu.org>
#
#   This program is free software; you can redistribute it and/or
#   modify it under the terms of the GNU General Public License as
#   published by the Free Software Foundation; either version 2, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#   General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; see the file COPYING.  If not, write to
#   the Free Software Foundation, 59 Temple Place, Suite 330, Boston,
#   MA 02111 USA.

_Dbg_help_add debug \
"debug [*bash-script* [*args*...]]

Recursively debug into *bash-script*.

If *script* is not given, take the script name from the command that
is about to be executed. Note that when the nested debug finished, you
are still where you were prior to entering the debugger.

See also:
---------

**skip** and **run**."

# TODO: would work better if instead of using $source_line below
# which might have several statements, we could just pick up the next
# single statement.
_Dbg_do_debug() {

    _Dbg_shell_new_shell_profile

    typeset script_cmd=${@:-$_Dbg_bash_command}

    # We need to expand variables that might be in $script_cmd.
    # set_Dbg_nested_debug_cmd is set up to to be eval'd below.
    typeset set_Dbg_debug_cmd="typeset _Dbg_debug_cmd=\"$script_cmd\"";

    [[ -z $BASH ]] && BASH='bash'

    eval "$_seteglob"
    # Add appropriate bash debugging options
    if (( ! _Dbg_script )) ; then
	# Running "bash --debugger", so prepend "bash --debugger"
	set_Dbg_debug_cmd="typeset _Dbg_debug_cmd=\"$BASH --init-file ${_Dbg_shell_temp_profile} --debugger $script_cmd\"";
    elif [[ $_Dbg_orig_0/// == *bashdb/// ]] ; then
	# Running "bashdb", so prepend "bash bashdb .."
	set_Dbg_debug_cmd="typeset _Dbg_debug_cmd=\"$BASH $_Dbg_orig_0 -q -L $_Dbg_libdir $script_cmd\"";
    fi
    eval "$_resteglob"
    eval $set_Dbg_debug_cmd

    if (( _Dbg_set_basename )) ; then
	_Dbg_msg "Debugging new script with $script_cmd"
    else
	_Dbg_msg "Debugging new script with $_Dbg_debug_cmd"
    fi
    typeset -r old_quit_on_quit=$_Dbg_QUIT_ON_QUIT
    export _Dbg_QUIT_ON_QUIT=1
    export BASHDB_BASENAME_ONLY="$_Dbg_set_basename"
    ((_Dbg_DEBUGGER_LEVEL++))
    $_Dbg_debug_cmd
    ((_Dbg_DEBUGGER_LEVEL--))
    _Dbg_restore_from_nested_shell
    export _Dbg_QUIT_ON_QUIT=$old_quit_on_quit
}