extract_all_paths.sh

#!/bin/bash

function showHelp {
    printf "\nUsage: $1 [OPTION]... [IGNORES]...\n"
    printf "Valid options:\n"
    printf "  -h\tThis help message\n"
    printf "  -d\tTarget directory\n"
    printf "  -o\tOutput file\n"
    printf "  -i=[list of dirs to ignore] (must be the last option in the command)\n"
    printf "\n"
}

# joins the given arguments using one character separator
function join { local IFS="$1"; shift; echo "$*"; }

# joins the given arguments using a string separator
function multijoin {
    separator=$1 # e.g. constructing regex, pray it does not contain %s
    shift
    items=( "$@" )
    ret="$( printf "${separator}%s" "${items[@]}" )"
    ret="${ret:${#separator}}" # remove leading separator
    echo "${ret}"
}

currentFile=$0
hasIgnores=false
targetDir=.
out=""

while getopts "h?id:o:" opt; do
    case "$opt" in
    h|\?)
        showHelp $currentFile
        ;;
    i)  hasIgnores=true
        ;;
    d)  targetDir=$OPTARG
        ;;
    o)  out=$OPTARG
        ;;
    esac
done

shift $((OPTIND-1))

ignore=""

if [ "$hasIgnores" = true ] ; then
    ignores=( "$@" )
    ignore=" \( "$( multijoin " -or " "${ignores[@]/#/-wholename }" )" \) -prune -o "
fi

cmd="find $targetDir $ignore-type f -not \( -wholename $currentFile -or -name \"*.xz\" -or -name \"*.gz\" -or -name \"*.bz2\" -or -name \"*.zip\" -or -name \"*.tgz\" \) -print"
echo $cmd
echo $targetDir

if [ -z "$out" ] ; then
    echo $cmd | bash -
else
    echo $cmd | bash - > $out
fi