rmcmd

#!/bin/zsh
# A simple command to automate the deletion of shell scripts.
# Companion to "mkcmd".

VERSION=1.0.1
HOME_BIN=${HOME}/bin
LOCAL_BIN=${HOME}/.local/bin
TARGET_BIN=""
WARN=true

showHelp()
{
cat <<- "EOF"
    Usage: rmcmd [-hvn] [-b|--bin <directory>] <command>

        -h, --help        print help document
        -v, --version     print script version
        -n, --no-warn     do not prompt before delete
        -b, --bin=OUTDIR  set the search directory to OUTDIR

    Config:
        rmcmd can be configured with a pre-determined search directory via the
        variable "default_bin_directory". The config file is the same as mkcmd,
        either $HOME/.mkcmd.conf or $XDG_CONFIG_HOME/mkcmd.conf. As an example,
        to set the default output directory to $HOME/bin, you would write this
        in the config file: default_bin_directory=$HOME/bin

    Examples:
        rmcmd new_command
        rmcmd -n --bin .local/bin new_command_2

    rmcmd v$VERSION
EOF
}

readConfig()
{
    [[ ! -f ${HOME}/.mkcmd.conf && ! -f ${XDG_CONFIG_HOME:-HOME"/.config"}/mkcmd.conf ]] && return 0
    [[ -f ${HOME}/.mkcmd.conf ]] && CONFIG=${HOME}/.mkcmd.conf
    [[ -f ${XDG_CONFIG_HOME:-HOME"/.config"}/mkcmd.conf ]] && CONFIG=${XDG_CONFIG_HOME:-HOME"/.config"}/mkcmd.conf
    CONF_BIN_DIR=$(grep -P "(?<=default_bin_directory=).+" --only-matching --color=no ${CONFIG})
    BUFFER=""
    for (( i=0 ; i < ${#CONF_BIN_DIR} ; i++ )); do
        if [[ ${CONF_BIN_DIR:$i:1} == "$" ]]; then
            i+=1
            VAR_BUFFER=""
            while [[ ${CONF_BIN_DIR:$i:1} =~ '\w' ]]; do
                VAR_BUFFER="${VAR_BUFFER}${CONF_BIN_DIR:$i:1}"
                i+=1
            done
            BUFFER="${BUFFER}$(env | grep --only-matching --color=no -P "(?<=\b${VAR_BUFFER}\b=).+")"
        fi
        BUFFER="${BUFFER}${CONF_BIN_DIR:$i:1}"
    done
    TARGET_BIN="${BUFFER}/"
}

readConfig

OPTIONS=$(getopt -l "help,version,no-warn,bin:" -o "hvnb:" -a -- "$@")
eval set -- ${OPTIONS}

while true
do
    case ${1} in
    -h|--help)
        showHelp
        exit 0
        ;;
    -v|--version)
        printf "rmcmd $VERSION"
        exit 0
        ;;
    -b|--bin)
        shift
        TARGET_BIN=${1}
        ;;
    -n|--no-warn)
        WARN=false
        ;;
    --)
        shift
        break
        ;;
    esac
    shift
done

CMDNAMES=($@)

if [[ ${#CMDNAMES[@]} == 0 ]]; then
    printf "[ERROR] Command name(s)/path(s) missing!\n"
    exit -1
fi

queryHomeBin()
{
    TARGET_BIN=${HOME_BIN:-LOCAL_BIN}
    if [[ -d ${HOME_BIN} && -d ${LOCAL_BIN} ]]; then
        printf "Multiple user bin/ directories discovered\n:: Directories\n   1) ${HOME_BIN}  2) ${LOCAL_BIN}\n"
        read -s "?Selection (default = 1): " CHOICE ; echo ""
        [[ ${CHOICE} == 2 ]] && TARGET_BIN=${LOCAL_BIN}
        return 0
    fi

    if [[ ! -d ${TARGET_BIN} ]]; then
        printf "[ERROR] Couldn't find ${HOME_BIN} or ${LOCAL_BIN}. Make sure at least one of them exists!\n"
        return -1
    fi
}

warnDelete()
{
    [[ ${WARN} == false ]] && return 0
    read -qs "?Delete file \"${COMMAND}\"? [Y/n] " CHOICE ; echo ""
    return ${CHOICE}
}

for COMMAND in ${CMDNAMES[@]}; do
    if [[ ! ${COMMAND} =~ "/" ]]; then
        [[ -z ${TARGET_BIN} || ! -d ${TARGET_BIN} ]] && queryHomeBin
        [[ $? -eq -1 ]] && exit -1
        COMMAND="${TARGET_BIN}/${COMMAND}"
    fi

    if [[ ! -e ${COMMAND} ]]; then
        printf "File not found at \"${COMMAND}\". Skipping!\n"
        continue
    fi

    warnDelete
    rm ${COMMAND}
done