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2.6 Using rlwrap

While Vicare comes with an interface to GNU Readline or compatible library, the REPL interaction offers only very basic editing capabilities. For this reason it is suggested to use rlwrap:

http://utopia.knoware.nl/~hlub/rlwrap/

to run Vicare’s REPL through this shell script: 

#!/bin/sh
#
# Vicare Scheme GNU Readline wrapper using Rlwrap.

## Configuration variables.

vicare_PROGRAM=$(type -p vicare)
rlwrap_PROGRAM=$(type -p rlwrap)

COMPLETIONS_FILE=~/.vicare_completions
COMPLETIONS_OPTION=--file=${COMPLETIONS_FILE}

## Data variables.

# Do NOT include '\!' and '?' in this string.
BREAK_CHARS="\"#'(),;\`\\|[]{}"

## Check programs and data files existence.

function error () {
    local MESSAGE=${1:?}
    printf 'vie error: %s\n' "${MESSAGE}" >&2
    exit 2
}
function warning () {
    local MESSAGE=${1:?}
    printf 'vie warning: %s\n' "${MESSAGE}" >&2
}

test -x "${rlwrap_PROGRAM}" || \
  error "cannot find program 'rlwrap'"
test -x "${vicare_PROGRAM}" || \
  error "cannot find program 'vicare'"

if ! test -f "${COMPLETIONS_FILE}" ; then
    warning "cannot find completions file '${COMPLETIONS_FILE}'"
    COMPLETIONS_OPTION=
fi

## Run.

exec "${rlwrap_PROGRAM}"                    \
    --ansi-colour-aware                     \
    --break-chars=${BREAK_CHARS}            \
    --complete-filenames                    \
    --history-no-dupes=2                    \
    --multi-line                            \
    --prompt-colour='1;31'                  \
    --quote-characters='"'                  \
    --remember                              \
    ${COMPLETIONS_OPTION}                   \
    "${vicare_PROGRAM}" --raw-repl "$@"

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