nex.sh/nex at master · astynax/nex.sh · GitHub

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#!/bin/sh

set -e

FZF=$(which fzf || true)
if [ -z "$FZF" ]; then
    echo "FZF not found :("
fi

NC=$(which nc)
if [ -z "$NC" ]; then
    echo "nc (netcat) not found :("
fi

HOST=""
if [ -z "$1" ]; then
    printf "Usage: nex HOST"
    exit 1
else
    HOST="$1"
fi

LOC="${2:-/}"

# collapses multiple slashes and handle . and ..
normalize_path() {
    # split $1 by /
    path="$1"
    oldIFS=$IFS
    IFS=/
    set -- $path  # no quotes!
    IFS=$oldIFS

    out='/'
    for comp; do
        case "$comp" in
            ''|.) continue ;;
            ..)
                out="${out%/*}"
                ;;
            *)
                case "$out" in
                    /) out="/$comp" ;;
                    *) out="$out/$comp" ;;
                esac
                ;;
        esac
    done
    case "$path" in
        */)
        case "$out" in
            */) ;;
            *) out="$out/"
        esac
        ;;
    esac
    printf '%s\n' "$out"
}

LOC=$(normalize_path "$LOC")

VIEW="$FZF +s +m --no-mouse --info=hidden --layout=reverse-list --height=~100%"

while :; do
    case "$LOC" in
        */) IS_DIR=1 ;;
        *) IS_DIR='' ;;
    esac

    NEXT=$(
        {
            [ "$LOC" != '/' ] && echo '=> /'
            [ -z "$IS_DIR" ] && echo '=> ./'
            [ "$LOC" != '/' ] && echo '=> ../'
            printf '%s\n' "$LOC" | $NC "$HOST" 1900
        } | $VIEW --footer="$HOST :: $LOC" || echo ':q'
        )

    if [ "$NEXT" = ':q' ]; then
        echo "bye!"
        break
    fi

    case "$NEXT" in
        "=> "*)
            set -- $NEXT  # split by spaces
            LINK=$2
            ;;
        *)
            # non-link selected, just do page refresh
            continue
            ;;
    esac

    case "$LINK" in
        nex://*)
            echo TODO
            ;;
        /*)
            # local absolute path, just go to it
            LOC=$(normalize_path "$LINK")
            ;;
        *)
            # select current directory if LOC points to the file
            case "$LOC" in
                /) ;;
                */) ;;
                *) LOC="$(dirname "$LOC")/";;
            esac

            LOC=$(normalize_path "$LOC$LINK")
            ;;
    esac
done