# vyatta bash configuration mode completion

# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
# 
# 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.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
# You can also obtain it by writing to the Free Software Foundation,
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
# 
# Author: Vyatta
# Description: bash completion for Vyatta configuration commands
# 
# **** End License ****

# Turn on history logging
export HISTCONTROL=
export HISTFILESIZE=10000
export HISTSIZE=10000
export HISTTIMEFORMAT='%FT%T%z ' 
export PROMPT_COMMAND='history -a'

# remove colon from completion word seperators
export COMP_WORDBREAKS=${COMP_WORDBREAKS/:/}

builtin set histappend=1

# only do this if we are going into configure mode
if [ "$_OFR_CONFIGURE" != "ok" ]; then
  return 0
fi

if [ -r /etc/default/vyatta ]; then
  source /etc/default/vyatta
fi

# function for shell api
vyatta_cli_shell_api ()
{
  local noeval=''
  if [ "$1" == NOEVAL ]; then
    noeval=true
    shift
  fi
  local outstr
  if ! outstr=$(${vyatta_sbindir}/my_cli_shell_api -- "$@"); then
    # display the error output (if any) and then fail
    if [ -n "$outstr" ]; then
      echo "$outstr"
    fi
    return 1
  fi
  # eval the output (if any)
  if [ -n "$outstr" ]; then
    if [ -n "$noeval" ]; then
      echo "$outstr"
    else
      eval "$outstr"
    fi
  fi
  return 0
}

# set up the session environment
## note: this can not use vyatta_cli_shell_api() above since it "declares"
##       env vars.
eval "$(${vyatta_sbindir}/my_cli_shell_api getSessionEnv $$)"

declare is_set=0
declare last_idx=0
declare -a comp_words=()

# commands to unalias
declare -a unalias_cmds=( clear configure date debug edit exit load merge \
                          no run set show save terminal undebug up top )
for cmd in "${unalias_cmds[@]}"; do
  unalias $cmd >& /dev/null
done

show ()
{
  local -a opts=()
  local -a args=()
  for arg in "$@"; do
    if [ "$arg" == "-all" ]; then
      opts+=('--show-show-defaults')
    else
      args+=("$arg")
    fi
  done
  cli-shell-api "${opts[@]}" -- showCfg "${args[@]}" \
    | eval "${VYATTA_PAGER:-cat}"
}

commit ()
{
  if ! vyatta_cli_shell_api sessionChanged; then
    echo "No configuration changes to commit"
    return 1;
  fi
  local comment="commit"
  local next=0
  local -a args=()
  for arg in "$@"; do
    if [ "$next" == "1" ]; then
      comment=$arg
      next=0;
    elif [ "$arg" == "comment" ]; then
      next=1
    elif [ "$arg" == "confirm" ]; then
      echo Use commit-confirm command
      return 1;
    else
      args[${#args[@]}]="$arg"    
    fi
  done
  args+=("-C '$comment'")

  export COMMIT_VIA=cli
  /opt/vyatta/sbin/my_commit "${args[@]}"
  unset COMMIT_VIA
}

commit-confirm ()
{
  if ! vyatta_cli_shell_api sessionChanged; then
    echo "No configuration changes to commit"
    return 1;
  fi
  local -a args=()
  local first=1
  local minutes=10
  for arg in "$@"; do
    if [ "$first" = "1" ]; then
      if [[ $arg = *[[:digit:]]* ]]; then
        minutes=$arg
      else
        args[${#args[@]}]="$arg"    
      fi
      first=0
    else
      args[${#args[@]}]="$arg"    
    fi
  done
  cmd="${vyatta_sbindir}/vyatta-config-mgmt.pl --action=commit-confirm \
                                               --minutes=$minutes"
  eval "sudo sg vyattacfg \"$cmd\" "
  if [ $? = 0 ]; then
    commit "$@"
  fi
}

confirm ()
{
  ${vyatta_sbindir}/vyatta-config-mgmt.pl --action=confirm
}

compare ()
{
  ${vyatta_sbindir}/vyatta-config-mgmt.pl --action=diff "$@" | eval "${VYATTA_PAGER:-cat}"
}

save ()
{
  if vyatta_cli_shell_api sessionChanged; then
    echo -e "Warning: you have uncommitted changes that will not be saved.\n"
  fi
  # return to top level.
  reset_edit_level
  # transform individual args into quoted strings
  local arg=''
  local save_cmd="${vyatta_sbindir}/vyatta-save-config.pl"
  for arg in "$@"; do
    save_cmd+=" '$arg'"
  done
  eval "sudo sg vyattacfg \"umask 0002 ; $save_cmd\""
  vyatta_cli_shell_api unmarkSessionUnsaved
}

reboot ()
{
  echo "Exit from configure mode before rebooting."
}

rollback ()
{
  if [ $# != 1 ]; then
    echo "Error: must include a revision # to rollback to"
    return 1;
  fi
  ${vyatta_sbindir}/vyatta-config-mgmt.pl --action=rollback --revnum "$@"
}

shutdown ()
{
  echo "Exit from configure mode before shutting down system."
}

reset_edit_level ()
{
  vyatta_cli_shell_api getEditResetEnv
  return $?
}

load ()
{
  # don't load if there are uncommitted changes.
  if vyatta_cli_shell_api sessionChanged; then
    echo "Cannot load: configuration modified."
    echo "Commit or discard the changes before loading a config file."
    return 1
  fi
  # return to top level.
  reset_edit_level
  ${vyatta_sbindir}/vyatta-load-config.pl "$@"
}

merge ()
{
  # don't load if there are uncommitted changes.
  if vyatta_cli_shell_api sessionChanged; then
    echo "Cannot load: configuration modified."
    echo "Commit or discard the changes before loading a config file."
    return 1
  fi
  # return to top level.
  reset_edit_level
  ${vyatta_sbindir}/vyatta-load-config.pl "$@" --merge
}

top ()
{
  if vyatta_cli_shell_api editLevelAtRoot; then
    echo "Already at the top level"
    return 0
  fi

  # go to the top level.
  reset_edit_level
}

edit ()
{
  vyatta_cli_shell_api getEditEnv "$@"
  return $?
}

up ()
{
  vyatta_cli_shell_api getEditUpEnv "$@"
  return $?
}

really_exit()
{

  if vyatta_cli_shell_api sessionUnsaved; then
    echo "Warning: configuration changes have not been saved."
  fi
  vyatta_cli_shell_api teardownSession
  unset _OFR_CONFIGURE
  builtin exit 0
}

exit ()
{
  local discard
  if [ $# == 0 ]; then
    discard=0
  elif [ $# == 1 ] && [ "$1" == "discard" ]; then
    discard=1
  else
    echo "Invalid argument \"$*\" for 'exit'"
    return 1
  fi

  if vyatta_cli_shell_api editLevelAtRoot; then
    # we are at the root level. check if we can really exit.
    if vyatta_cli_shell_api sessionChanged; then
      if (( ! discard )); then
        echo "Cannot exit: configuration modified."
        echo "Use 'exit discard' to discard the changes and exit."
        return 1
      fi
    fi
    really_exit
  fi

  # "exit" to the root level.
  reset_edit_level
}

# run op mode commands
run ()
{
 if [ $# == 0 ]; then
  echo Incomplete command
  return 1
 fi 
  _vyatta_op_run $@
}

# do op mode completion
vyatta_run_complete ()
{
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  COMP_WORDS=( "${COMP_WORDS[@]:1}" )
  (( COMP_CWORD -= 1 ))
  _vyatta_op_expand
  
  eval $restore_shopts
}

vyatta_loadsave_complete()
{
  # Generate completion help for the "load" and "save" commands

  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  # File name completion, and completion of the various URL formats
  # is not supported yet.
  #
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ]; then
      echo
      echo "Possible completions:"
      if [ "${COMP_WORDS[0]}" = "load" ]; then
	  echo -e "  <Enter>\t\t\t\tLoad from system config file"
	  echo -e "  <file>\t\t\t\tLoad from file on local machine"
	  echo -e "  scp://<user>:<passwd>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  ftp://<user>:<passwd>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  http://<host>/<file>\t\t\tLoad from file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tLoad from file on remote machine"
      elif [ "${COMP_WORDS[0]}" = "merge" ]; then
	  echo -e "  <Enter>\t\t\t\tMerge from system config file"
	  echo -e "  <file>\t\t\t\tMerge from file on local machine"
	  echo -e "  scp://<user>:<passwd>@<host>/<file>\tMerge from file on remote machine"
	  echo -e "  ftp://<user>:<passwd>@<host>/<file>\tMerge from file on remote machine"
	  echo -e "  http://<host>/<file>\t\t\tMerge from file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tMerge from file on remote machine"
      elif [ "${COMP_WORDS[0]}" = "save" ]; then
	  echo -e "  <Enter>\t\t\t\tSave to system config file"
	  echo -e "  <file>\t\t\t\tSave to file on local machine"
	  echo -e "  scp://<user>:<passwd>@<host>/<file>\tSave to file on remote machine"
	  echo -e "  ftp://<user>:<passwd>@<host>/<file>\tSave to file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tSave to file on remote machine"
      fi
      COMPREPLY=( "" " " )
  else
      COMPREPLY=()
  fi

  eval $restore_shopts
}

loadkey()
{
  # don't load if there are uncommitted changes.
  if vyatta_cli_shell_api sessionChanged; then
    echo "Cannot load: configuration modified."
    echo "Commit or discard the changes before loading a config file."
    return 1
  fi
  # return to top level.
  reset_edit_level
  ${vyatta_sbindir}/vyatta-load-user-key.pl "$@"
}

vyatta_loadkey_complete()
{
  case "$COMP_CWORD" in
      1) if [ -z "${COMP_WORDS[1]}" ]; then
	  COMPREPLY=( $(getent passwd | awk -F: '$7 == "/bin/vbash" { print $1}') )
	 else
	  COMPREPLY=( $(compgen -u -- ${COMP_WORDS[1]} ) )
         fi ;;
      2) if [ -z "${COMP_WORDS[2]}" ]; then
	  echo
	  echo "Possible completions:"
	  echo -e "  <file>\t\t\t\tLoad from file on local machine"
	  echo -e "  scp://<user>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  ftp://<user>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  http://<host>/<file>\t\t\tLoad from file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tLoad from file on remote machine"
	  COMPREPLY=()
	 else
	  COMPREPLY=( $(compgen -f -- ${COMP_WORDS[2]} ) )
	 fi ;;
  esac
}

print_commit_log ()
{
  local -a array
  eval "array=($(${vyatta_sbindir}/vyatta-config-mgmt.pl --action=show-commit-log-brief))"
  local count=0
  for i in "${array[@]}"; do
     i=${i//_/ }
     echo -e "$count\t$i"
     (( count++ ))
  done
}

vyatta_rollback_complete ()
{
  # Generate completion help for the "rollback" command

  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ]; then
      echo
      echo "Possible completions:"
      echo -e "<N>\tRollback to revision N (currently requires reboot)"
      print_commit_log
      COMPREPLY=( "" " " )
  else
      COMPREPLY=()
  fi

  eval $restore_shopts
}

vyatta_compare_complete ()
{
  # Generate completion help for the "compare" command

  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ]; then
      echo
      echo "Possible completions:"
      echo -e "<enter>\tCompare working & active configurations"
      echo -e "<N>\tCompare working with revision N"
      echo -e "<N> <M>\tCompare revision N with M"
      print_commit_log
      COMPREPLY=( "" " " )
  elif [ $COMP_CWORD -eq 2 -a -z "${COMP_WORDS[2]}" ]; then
      echo
      echo "Possible completions:"
      echo -e "<enter>\tCompare working & active configurations"
      echo -e "<N>\tCompare working with revision N"
      echo -e "<N> <M>\tCompare revision N with M"
      print_commit_log
      COMPREPLY=( "" " " )
  else
      COMPREPLY=()
  fi

  eval $restore_shopts
}

vyatta_commit_complete ()
{
  # Generate completion help for the "commit-confirm" command

  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ]; then
      echo
      echo "Possible completions:"
      if [ "${COMP_WORDS[0]}" = "commit" ]; then
         echo -e "<enter>\tCommit working configuration"
      elif [ "${COMP_WORDS[0]}" = "commit-confirm" ]; then
         echo -e "<enter>\tCommit, rollback/reboot in 10 minutes if no confirm"
         echo -e "<N>\tCommit, rollback/reboot in N minutes if no confirm"
      fi
      echo -e "comment\tComment for commit log"
      COMPREPLY=( "" " " )
  elif [ "${COMP_WORDS[1]}" = "comment" ]; then
            echo
      echo "Possible completions:"
      echo -e "<txt>\tText comment for commit log (e.g. \"add user bob\")"
      COMPREPLY=( "" " " )
  else
      COMPREPLY=()
  fi

  eval $restore_shopts
}

get_prefix_filtered_list ()
{
  # $1: prefix
  # $2: \@list
  # $3: \@filtered
  declare -a olist
  local pfx=$1
  pfx=${pfx#\"}
  eval "olist=( \"\${$2[@]}\" )"
  local idx=0
  for elem in "${olist[@]}"; do
    local sub=${elem#$pfx}
    if [ "$elem" == "$sub" ] && [ -n "$pfx" ]; then
      continue
    fi
    eval "$3[$idx]=\"$elem\""
    (( idx++ ))
  done
}

get_prefix_filtered_list2 ()
{
  # $1: prefix
  # $2: \@list
  # $3: \@filtered
  # $4: \@list2
  # $5: \@filtered2
  declare -a olist
  local pfx=$1
  pfx=${pfx#\"}
  eval "olist=( \"\${$2[@]}\" )"
  eval "local orig_len=\${#$2[@]}"
  local orig_idx=0
  local idx=0
  for (( orig_idx = 0; orig_idx < orig_len; orig_idx++ )); do
    eval "local elem=\${$2[$orig_idx]}"
    eval "local elem2=\${$4[$orig_idx]}"
    local sub=${elem#$pfx}
    if [ "$elem" == "$sub" ] && [ -n "$pfx" ]; then
      continue
    fi
    eval "$3[$idx]=\"$elem\""
    eval "$5[$idx]=\"$elem2\""
    (( idx++ ))
  done
}

declare vyatta_cfg_help=""
declare vyatta_cfg_type=""
declare vyatta_cfg_tag=0
declare vyatta_cfg_multi=0
declare -a vyatta_cfg_allowed=()
declare vyatta_cfg_comp_help=""
declare -a vyatta_cfg_val_type=()
declare -a vyatta_cfg_val_help=()

declare -a _get_help_text_items=()
declare -a _get_help_text_helps=()
get_help_text ()
{
  vyatta_help_text="\\nPossible completions:"
  for (( idx = 0; idx < ${#_get_help_text_items[@]}; idx++ )); do
    vyatta_help_text+="\\n\\x20\\x20"
    if [ ${#_get_help_text_items[idx]} -lt 6 ]; then
      vyatta_help_text+="${_get_help_text_items[idx]}\\t\\t"
    elif [ ${#_get_help_text_items[idx]} -lt 14 ]; then
      vyatta_help_text+="${_get_help_text_items[idx]}\\t"
    else
      vyatta_help_text+="${_get_help_text_items[idx]}\\n\\x20\\x20\\t\\t"
    fi
    vyatta_help_text+="${_get_help_text_helps[idx]}"
  done
  if [ -n "$vyatta_cfg_comp_help" ]; then
    local hstr=${vyatta_cfg_comp_help//\'/\'\\\\\\\'\'}
    vyatta_help_text+="\\n\\nDetailed information:\\n"
    local sIFS=$IFS
    IFS='
'
    local chstr=$(echo -en "$hstr\n" \
                  | while read comp_help_line; do
                      echo "vyatta_help_text+='  $comp_help_line\\n';"
                    done)
    eval "$chstr"
    IFS=$sIFS
  fi
}

get_value_format_string ()
{
  local vtype=$1
  if [[ $vtype = !* ]]; then
    echo -n '!'
    vtype="${vtype#!}"
  fi
  case "$vtype" in
    _*)
      echo -n "${vtype#_}"
      ;;
    txt)
      echo -n '<text>'
      ;;
    u32)
      echo -n '<0-4294967295>'
      ;;
    u32:*)
      echo -n "<${vtype##u32:}>"
      ;;
    range)
      echo -n "<start>-<end>"
      ;;
    ipv4)
      echo -n '<x.x.x.x>'
      ;;
    ipv6)
      echo -n '<h:h:h:h:h:h:h:h>'
      ;;
    ipv4net)
      echo -n '<x.x.x.x/x>'
      ;;
    ipv6net)
      echo -n '<h:h:h:h:h:h:h:h/x>'
      ;;
    ipv4range)
      echo -n '<x.x.x.x>-<x.x.x.x>'
      ;;
    ipv6range)
      echo -n '<h:h:h:h:h:h:h:h>-<h:h:h:h:h:h:h:h>'
      ;;
    bool)
      echo -n '<boolean>'
      ;;
    macaddr)
      echo -n '<h:h:h:h:h:h>'
      ;;
    *)
      echo -n "$vtype"
      ;;
  esac
}

declare -a vyatta_completions
declare vyatta_help_text="\\nNo help text available"
declare vyatta_do_help=false
vyatta_do_complete ()
{
  if $vyatta_do_help; then
    printf "$vyatta_help_text"
    COMPREPLY=( "" " " )
  else
    local -a f_comps=()
    local cword=
    if (( ${#COMP_WORDS[@]} > 0 )); then
      cword=${COMP_WORDS[COMP_CWORD]}
    fi
    get_prefix_filtered_list "$cword" vyatta_completions f_comps
    local estr="COMPREPLY=( "
    for w in "${f_comps[@]}"; do
      estr="$estr\"$w\" "
    done
    estr="${estr})"
    eval "$estr"
  fi
  vyatta_help_text="\\nNo help text available"
}

vyatta_simple_complete ()
{
  # when this function is called, it is expected that:
  # * "vyatta_help_text" is filled with the help text.
  # * "vyatta_completions" is an array of "filtered" possible completions
  #   (i.e., only those starting with the current last component).
  if $vyatta_do_help; then
    printf "$vyatta_help_text"
    COMPREPLY=( "" " " )
  else
    COMPREPLY=( "${vyatta_completions[@]}" )
  fi
  vyatta_help_text="\\nNo help text available"
}

generate_pipe_help ()
{
  _get_help_text_items=( "${_vyatta_pipe_completions[@]}" \
                         "${_vyatta_pipe_noncompletions[@]}" )
  _get_help_text_helps=()
  for comp in "${_get_help_text_items[@]}"; do
    _get_help_text_helps+=("$(_vyatta_pipe_help "$comp")")
  done
  get_help_text
}

# env variables for shell api completion
declare _cli_shell_api_last_comp_val=''
declare _cli_shell_api_comp_help=''
declare -a _cli_shell_api_comp_values=()
declare -a _cli_shell_api_hitems=()
declare -a _cli_shell_api_hstrs=()

vyatta_config_complete ()
{
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  if [ "$COMP_LINE" == "$VYATTA_COMP_LINE" ]; then
    VYATTA_COMP_LINE=$VYATTA_COMP_LINE_EMPTY
    vyatta_do_help=true
  else
    VYATTA_COMP_LINE=$COMP_LINE
    vyatta_do_help=false
  fi

  # handle pipe
  if _vyatta_pipe_completion "${COMP_WORDS[@]}"; then
    generate_pipe_help
    vyatta_completions=( "${_vyatta_pipe_completions[@]}" )
    vyatta_do_complete
    eval $restore_shopts
    return
  fi

  if (( ${#COMP_WORDS[@]} < 2 )); then
    _get_help_text_items=( "confirm" \
                           "comment" \
                           "commit" \
                           "commit-confirm" \
                           "compare" \
                           "copy" \
                           "delete" \
                           "discard" \
                           "edit" \
                           "exit" \
                           "load" \
                           "loadkey" \
                           "merge" \
                           "rename" \
                           "rollback" \
                           "run" \
                           "save" \
                           "set" \
                           "show" )
    _get_help_text_helps=( \
      "Confirm prior commit-confirm" \
      "Add comment to this configuration element" \
      "Commit the current set of changes" \
      "Commit the current set of changes with 'confirm' required" \
      "Compare configuration revisions" \
      "Copy a configuration element" \
      "Delete a configuration element" \
      "Discard uncommitted changes" \
      "Edit a sub-element" \
      "Exit from this configuration level" \
      "Load configuration from a file and replace running configuration" \
      "Load user SSH key from a file" \
      "Load configuration from a file and merge running configuration" \
      "Rename a configuration element" \
      "Rollback to a prior config revision (requires reboot)" \
      "Run an operational-mode command" \
      "Save configuration to a file" \
      "Set the value of a parameter or create a new element" \
      "Show the configuration (default values may be suppressed)" \
    )
    if (( ${#COMP_WORDS[@]} == 1 )); then
      declare -a fitems=()
      declare -a fstrs=()
      get_prefix_filtered_list2 "${COMP_WORDS[0]}" \
        _get_help_text_items fitems _get_help_text_helps fstrs
      _get_help_text_items=( "${fitems[@]}" )
      _get_help_text_helps=( "${fstrs[@]}" )
    fi
    get_help_text
    vyatta_completions=( "${_get_help_text_items[@]}" )
    vyatta_do_complete
    eval $restore_shopts
    return
  fi

  local command=${COMP_WORDS[0]}
  local last_comp="${COMP_WORDS[COMP_CWORD]}"

  # handle "exit"
  if [ "$command" == "exit" ]; then
    if (( COMP_CWORD > 1 )); then
      COMPREPLY=()
      eval $restore_shopts
      return
    fi
    _get_help_text_items=("discard")
    _get_help_text_helps=("Discard any changes")
    get_help_text
    vyatta_completions=("discard")
    vyatta_do_complete
    eval $restore_shopts
    return
  fi

  local -a api_args=("${COMP_WORDS[@]}")

  # handle "copy" and "rename"
  if [ "$command" == "copy" -o "$command" == "rename" ]; then
    # Syntax of copy and rename commands are:
    #
    #     copy/rename <param1> <sub-param1> to <param2> <sub-param2>
    #
    # where <param1> and <param2> are configuration parameters
    # in the tree at the current edit level.
    #
    # If parsing index 1 or 2 (i.e. <param1> or <sub-param1>),
    # fall through this test to the parameter parsing code below.
    if (( COMP_CWORD == 3 )); then
      # If parsing index 3, there's only one option.
      _get_help_text_items=("to")
      _get_help_text_helps=("Set destination")
      get_help_text
      vyatta_completions=("to")
      vyatta_do_complete
      eval $restore_shopts
      return
    elif (( COMP_CWORD > 3 && COMP_CWORD < 6 )); then
      # If parsing index 4 or 5, start completion at <param2>.
      api_args=("$command" "${COMP_WORDS[@]:4}")
    elif (( COMP_CWORD > 5 )); then
      # If parsing after index 5, there are no more valid parameters
      COMPREPLY=()
      eval $restore_shopts
      return
    fi
  fi

  if ! vyatta_cli_shell_api getCompletionEnv "${api_args[@]}"; then
    # invalid completion
    eval $restore_shopts
    return
  fi
  vyatta_cfg_comp_help=$_cli_shell_api_comp_help
  _get_help_text_helps=( "${_cli_shell_api_hstrs[@]}" )
  if $_cli_shell_api_last_comp_val; then
    # last component is a "value". need to do the following:
    #   use comp_help if exists
    #   prefix filter comp_values
    #   replace any <*> in comp_values with ""
    #   convert help items to <...> representation
    _get_help_text_items=()
    for ((i = 0; i < ${#_cli_shell_api_hitems[@]}; i++)); do
      local t=$(get_value_format_string "${_cli_shell_api_hitems[i]}")
      _get_help_text_items+=("$t")
    done
    vyatta_completions=()
    for ((i = 0; i < ${#_cli_shell_api_comp_values[@]}; i++)); do
      if [ -z "$last_comp" ] \
         && [[ "${_cli_shell_api_comp_values[i]}" = \<*\> ]]; then
        vyatta_completions+=("")
      elif [ -z "$last_comp" ] \
           || [[ "${_cli_shell_api_comp_values[i]}" = "$last_comp"* ]]; then
        vyatta_completions+=("${_cli_shell_api_comp_values[i]}")
      fi
    done
  else
    _get_help_text_items=( "${_cli_shell_api_hitems[@]}" )
    vyatta_completions=( "${_cli_shell_api_comp_values[@]}" )
  fi
  get_help_text
  vyatta_simple_complete
  eval $restore_shopts
}

if ! vyatta_cli_shell_api setupSession; then
  echo 'Failed to set up config session'
  builtin exit 1
fi

# disallow 'Ctrl-D' exit, since we need special actions on 'exit'
builtin set -o ignoreeof 1

reset_edit_level
alias set=/opt/vyatta/sbin/my_set
alias delete=/opt/vyatta/sbin/my_delete
alias rename=/opt/vyatta/sbin/my_rename
alias copy=/opt/vyatta/sbin/my_copy
alias comment=/opt/vyatta/sbin/my_comment
alias discard=/opt/vyatta/sbin/my_discard

export VYATTA_COMP_LINE_EMPTY=VYATTA_COMP_LINE_EMPTY
export VYATTA_COMP_LINE=$VYATTA_COMP_LINE_EMPTY

# readline bindings
bind 'set show-all-if-ambiguous on'
if ! bind -p |grep -q '\\C-x\\C-t'; then
  bind '"\C-x\C-t": kill-region'
fi
if ! bind -p |grep -q '\\C-x\\C-o'; then
  bind '"\C-x\C-o": copy-region-as-kill'
fi

# note: now that we're using bash's new "empty completion" (-E), it becomes
# necessary to capture the "default completion" (-D) as well in order to
# provide completion "within the first word". (see below for -E and -D
# assignments.) however, this changes the previous behavior that uses
# "filename completion" as default completion.
#
# since we explicitly specify the completion function for each vyatta command,
# the "default completion" only applies in two scenarios:
#   1. "within" the first word, and
#   2. after any non-vyatta commands that do not have completion functions.
#
# therefore, to provide the previous behavior, just detect scenario 2 above
# and use filename completion.
vyatta_config_default_complete ()
{
  local wc=${#COMP_WORDS[@]}
  if (( wc < 2 )); then
    vyatta_config_complete
  else
    # after the first word => cannot be vyatta command so use original default
    compopt -o filenames
    _filedir_xspec
  fi
}

complete -E -F vyatta_config_complete 
complete -D -F vyatta_config_default_complete
complete -F vyatta_config_complete set
complete -F vyatta_config_complete delete
complete -F vyatta_config_complete show
complete -F vyatta_config_complete edit
complete -F vyatta_config_complete exit
complete -F vyatta_run_complete run
complete -F vyatta_loadsave_complete save
complete -F vyatta_loadsave_complete load
complete -F vyatta_loadsave_complete merge
complete -F vyatta_loadkey_complete loadkey
complete -F vyatta_compare_complete compare
complete -F vyatta_config_complete comment
complete -F vyatta_config_complete copy
complete -F vyatta_config_complete rename
complete -F vyatta_rollback_complete rollback
complete -F vyatta_commit_complete commit
complete -F vyatta_commit_complete commit-confirm

# Local Variables:
# mode: shell-script
# sh-indentation: 4
# End: